mirror of
https://github.com/polhenarejos/pico-hsm.git
synced 2024-09-20 03:10:09 +00:00
First commit. Attempting to emulate a CCID device. Not easy with RP2040
Signed-off-by: Pol Henarejos <pol.henarejos@cttc.es>
This commit is contained in:
parent
a2939d610c
commit
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17
CMakeLists.txt
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17
CMakeLists.txt
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cmake_minimum_required(VERSION 3.13)
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include(pico_sdk_import.cmake)
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project(hsm2040 C CXX ASM)
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set(CMAKE_C_STANDARD 11)
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set(CMAKE_CXX_STANDARD 17)
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pico_sdk_init()
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add_executable(hsm2040
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hsm2040.c
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)
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pico_add_extra_outputs(hsm2040)
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target_link_libraries(hsm2040 PRIVATE pico_stdlib hardware_resets hardware_irq)
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612
hsm2040.c
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612
hsm2040.c
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/**
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* Copyright (c) 2020 Raspberry Pi (Trading) Ltd.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <stdio.h>
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// Pico
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#include "pico/stdlib.h"
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// For memcpy
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#include <string.h>
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// Include descriptor struct definitions
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#include "usb_common.h"
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// USB register definitions from pico-sdk
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#include "hardware/regs/usb.h"
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// USB hardware struct definitions from pico-sdk
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#include "hardware/structs/usb.h"
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// For interrupt enable and numbers
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#include "hardware/irq.h"
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// For resetting the USB controller
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#include "hardware/resets.h"
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// Device descriptors
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#include "hsm2040.h"
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#define usb_hw_set hw_set_alias(usb_hw)
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#define usb_hw_clear hw_clear_alias(usb_hw)
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// Function prototypes for our device specific endpoint handlers defined
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// later on
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void ep0_in_handler(uint8_t *buf, uint16_t len);
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void ep0_out_handler(uint8_t *buf, uint16_t len);
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void ep1_out_handler(uint8_t *buf, uint16_t len);
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void ep2_in_handler(uint8_t *buf, uint16_t len);
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// Global device address
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static bool should_set_address = false;
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static uint8_t dev_addr = 0;
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static volatile bool configured = false;
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// Global data buffer for EP0
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static uint8_t ep0_buf[64];
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// Struct defining the device configuration
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static struct usb_device_configuration dev_config = {
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.device_descriptor = &device_descriptor,
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.interface_descriptor = &interface_descriptor,
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.config_descriptor = &config_descriptor,
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.lang_descriptor = lang_descriptor,
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.descriptor_strings = descriptor_strings,
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.endpoints = {
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{
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.descriptor = &ep0_out,
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.handler = &ep0_out_handler,
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.endpoint_control = NULL, // NA for EP0
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.buffer_control = &usb_dpram->ep_buf_ctrl[0].out,
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// EP0 in and out share a data buffer
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.data_buffer = &usb_dpram->ep0_buf_a[0],
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},
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{
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.descriptor = &ep0_in,
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.handler = &ep0_in_handler,
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.endpoint_control = NULL, // NA for EP0,
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.buffer_control = &usb_dpram->ep_buf_ctrl[0].in,
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// EP0 in and out share a data buffer
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.data_buffer = &usb_dpram->ep0_buf_a[0],
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},
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{
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.descriptor = &ep1_out,
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.handler = &ep1_out_handler,
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// EP1 starts at offset 0 for endpoint control
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.endpoint_control = &usb_dpram->ep_ctrl[0].out,
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.buffer_control = &usb_dpram->ep_buf_ctrl[1].out,
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// First free EPX buffer
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.data_buffer = &usb_dpram->epx_data[0 * 64],
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},
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{
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.descriptor = &ep2_in,
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.handler = &ep2_in_handler,
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.endpoint_control = &usb_dpram->ep_ctrl[1].in,
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.buffer_control = &usb_dpram->ep_buf_ctrl[2].in,
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// Second free EPX buffer
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.data_buffer = &usb_dpram->epx_data[1 * 64],
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}
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}
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};
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/**
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* @brief Given an endpoint address, return the usb_endpoint_configuration of that endpoint. Returns NULL
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* if an endpoint of that address is not found.
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*
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* @param addr
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* @return struct usb_endpoint_configuration*
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*/
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struct usb_endpoint_configuration *usb_get_endpoint_configuration(uint8_t addr) {
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struct usb_endpoint_configuration *endpoints = dev_config.endpoints;
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for (int i = 0; i < USB_NUM_ENDPOINTS; i++) {
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if (endpoints[i].descriptor && (endpoints[i].descriptor->bEndpointAddress == addr)) {
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return &endpoints[i];
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}
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}
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return NULL;
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}
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/**
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* @brief Given a C string, fill the EP0 data buf with a USB string descriptor for that string.
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*
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* @param C string you would like to send to the USB host
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* @return the length of the string descriptor in EP0 buf
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*/
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uint8_t usb_prepare_string_descriptor(const unsigned char *str) {
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// 2 for bLength + bDescriptorType + strlen * 2 because string is unicode. i.e. other byte will be 0
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uint8_t bLength = 2 + (strlen((const char *)str) * 2);
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static const uint8_t bDescriptorType = 0x03;
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volatile uint8_t *buf = &ep0_buf[0];
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*buf++ = bLength;
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*buf++ = bDescriptorType;
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uint8_t c;
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do {
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c = *str++;
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*buf++ = c;
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*buf++ = 0;
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} while (c != '\0');
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return bLength;
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}
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/**
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* @brief Take a buffer pointer located in the USB RAM and return as an offset of the RAM.
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*
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* @param buf
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* @return uint32_t
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*/
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static inline uint32_t usb_buffer_offset(volatile uint8_t *buf) {
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return (uint32_t) buf ^ (uint32_t) usb_dpram;
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}
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/**
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* @brief Set up the endpoint control register for an endpoint (if applicable. Not valid for EP0).
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*
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* @param ep
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*/
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void usb_setup_endpoint(const struct usb_endpoint_configuration *ep) {
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printf("Set up endpoint 0x%x with buffer address 0x%p\n", ep->descriptor->bEndpointAddress, ep->data_buffer);
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// EP0 doesn't have one so return if that is the case
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if (!ep->endpoint_control) {
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return;
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}
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// Get the data buffer as an offset of the USB controller's DPRAM
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uint32_t dpram_offset = usb_buffer_offset(ep->data_buffer);
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uint32_t reg = EP_CTRL_ENABLE_BITS
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| EP_CTRL_INTERRUPT_PER_BUFFER
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| (ep->descriptor->bmAttributes << EP_CTRL_BUFFER_TYPE_LSB)
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| dpram_offset;
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*ep->endpoint_control = reg;
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}
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/**
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* @brief Set up the endpoint control register for each endpoint.
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*
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*/
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void usb_setup_endpoints() {
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const struct usb_endpoint_configuration *endpoints = dev_config.endpoints;
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for (int i = 0; i < USB_NUM_ENDPOINTS; i++) {
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if (endpoints[i].descriptor && endpoints[i].handler) {
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usb_setup_endpoint(&endpoints[i]);
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}
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}
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}
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/**
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* @brief Set up the USB controller in device mode, clearing any previous state.
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*
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*/
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void usb_device_init() {
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// Reset usb controller
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reset_block(RESETS_RESET_USBCTRL_BITS);
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unreset_block_wait(RESETS_RESET_USBCTRL_BITS);
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// Clear any previous state in dpram just in case
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memset(usb_dpram, 0, sizeof(*usb_dpram)); // <1>
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// Enable USB interrupt at processor
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irq_set_enabled(USBCTRL_IRQ, true);
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// Mux the controller to the onboard usb phy
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usb_hw->muxing = USB_USB_MUXING_TO_PHY_BITS | USB_USB_MUXING_SOFTCON_BITS;
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// Force VBUS detect so the device thinks it is plugged into a host
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usb_hw->pwr = USB_USB_PWR_VBUS_DETECT_BITS | USB_USB_PWR_VBUS_DETECT_OVERRIDE_EN_BITS;
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// Enable the USB controller in device mode.
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usb_hw->main_ctrl = USB_MAIN_CTRL_CONTROLLER_EN_BITS;
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// Enable an interrupt per EP0 transaction
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usb_hw->sie_ctrl = USB_SIE_CTRL_EP0_INT_1BUF_BITS; // <2>
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// Enable interrupts for when a buffer is done, when the bus is reset,
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// and when a setup packet is received
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usb_hw->inte = USB_INTS_BUFF_STATUS_BITS |
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USB_INTS_BUS_RESET_BITS |
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USB_INTS_SETUP_REQ_BITS;
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// Set up endpoints (endpoint control registers)
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// described by device configuration
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usb_setup_endpoints();
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// Present full speed device by enabling pull up on DP
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usb_hw_set->sie_ctrl = USB_SIE_CTRL_PULLUP_EN_BITS;
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}
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/**
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* @brief Given an endpoint configuration, returns true if the endpoint
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* is transmitting data to the host (i.e. is an IN endpoint)
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*
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* @param ep, the endpoint configuration
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* @return true
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* @return false
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*/
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static inline bool ep_is_tx(struct usb_endpoint_configuration *ep) {
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return ep->descriptor->bEndpointAddress & USB_DIR_IN;
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}
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/**
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* @brief Starts a transfer on a given endpoint.
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*
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* @param ep, the endpoint configuration.
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* @param buf, the data buffer to send. Only applicable if the endpoint is TX
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* @param len, the length of the data in buf (this example limits max len to one packet - 64 bytes)
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*/
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void usb_start_transfer(struct usb_endpoint_configuration *ep, uint8_t *buf, uint16_t len) {
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// We are asserting that the length is <= 64 bytes for simplicity of the example.
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// For multi packet transfers see the tinyusb port.
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assert(len <= 64);
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printf("Start transfer of len %d on ep addr 0x%x\n", len, ep->descriptor->bEndpointAddress);
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// Prepare buffer control register value
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uint32_t val = len | USB_BUF_CTRL_AVAIL;
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printf("VAL %d (%x)\n",val,val);
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if (ep_is_tx(ep)) {
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// Need to copy the data from the user buffer to the usb memory
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memcpy((void *) ep->data_buffer, (void *) buf, len);
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// Mark as full
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val |= USB_BUF_CTRL_FULL;
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}
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// Set pid and flip for next transfer
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val |= ep->next_pid ? USB_BUF_CTRL_DATA1_PID : USB_BUF_CTRL_DATA0_PID;
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ep->next_pid ^= 1u;
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*ep->buffer_control = val;
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}
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/**
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* @brief Send device descriptor to host
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*
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*/
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void usb_handle_device_descriptor(volatile struct usb_setup_packet *pkt) {
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const struct usb_device_descriptor *d = dev_config.device_descriptor;
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// EP0 in
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struct usb_endpoint_configuration *ep = usb_get_endpoint_configuration(EP0_IN_ADDR);
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// Always respond with pid 1
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ep->next_pid = 1;
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usb_start_transfer(ep, (uint8_t *) d, MIN(sizeof(struct usb_device_descriptor),pkt->wLength));
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}
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/**
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* @brief Send the configuration descriptor (and potentially the configuration and endpoint descriptors) to the host.
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*
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* @param pkt, the setup packet received from the host.
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*/
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void usb_handle_config_descriptor(volatile struct usb_setup_packet *pkt) {
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uint8_t *buf = &ep0_buf[0];
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// First request will want just the config descriptor
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const struct usb_configuration_descriptor *d = dev_config.config_descriptor;
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memcpy((void *) buf, d, sizeof(struct usb_configuration_descriptor));
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buf += sizeof(struct usb_configuration_descriptor);
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// If we more than just the config descriptor copy it all
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if (pkt->wLength >= d->wTotalLength) {
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memcpy((void *) buf, dev_config.interface_descriptor, sizeof(struct usb_interface_descriptor));
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buf += sizeof(struct usb_interface_descriptor);
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const struct usb_endpoint_configuration *ep = dev_config.endpoints;
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// Copy all the endpoint descriptors starting from EP1
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for (uint i = 2; i < USB_NUM_ENDPOINTS; i++) {
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if (ep[i].descriptor) {
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memcpy((void *) buf, ep[i].descriptor, sizeof(struct usb_endpoint_descriptor));
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buf += sizeof(struct usb_endpoint_descriptor);
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}
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}
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}
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// Send data
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// Get len by working out end of buffer subtract start of buffer
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uint32_t len = (uint32_t) buf - (uint32_t) &ep0_buf[0];
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usb_start_transfer(usb_get_endpoint_configuration(EP0_IN_ADDR), &ep0_buf[0], MIN(len,pkt->wLength));
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}
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/**
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* @brief Handle a BUS RESET from the host by setting the device address back to 0.
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*
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*/
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void usb_bus_reset(void) {
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// Set address back to 0
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dev_addr = 0;
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should_set_address = false;
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usb_hw->dev_addr_ctrl = 0;
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configured = false;
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}
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/**
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* @brief Send the requested string descriptor to the host.
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*
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* @param pkt, the setup packet from the host.
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*/
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void usb_handle_string_descriptor(volatile struct usb_setup_packet *pkt) {
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uint8_t i = pkt->wValue & 0xff;
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uint8_t len = 0;
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if (i == 0) {
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len = 4;
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memcpy(&ep0_buf[0], dev_config.lang_descriptor, len);
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} else {
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// Prepare fills in ep0_buf
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len = usb_prepare_string_descriptor(dev_config.descriptor_strings[i - 1]);
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}
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usb_start_transfer(usb_get_endpoint_configuration(EP0_IN_ADDR), &ep0_buf[0], MIN(len,pkt->wLength));
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}
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/**
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* @brief Sends a zero length status packet back to the host.
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*/
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void usb_acknowledge_out_request(void) {
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usb_start_transfer(usb_get_endpoint_configuration(EP0_IN_ADDR), NULL, 0);
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}
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/**
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* @brief Handles a SET_ADDR request from the host. The actual setting of the device address in
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|
* hardware is done in ep0_in_handler. This is because we have to acknowledge the request first
|
||||||
|
* as a device with address zero.
|
||||||
|
*
|
||||||
|
* @param pkt, the setup packet from the host.
|
||||||
|
*/
|
||||||
|
void usb_set_device_address(volatile struct usb_setup_packet *pkt) {
|
||||||
|
// Set address is a bit of a strange case because we have to send a 0 length status packet first with
|
||||||
|
// address 0
|
||||||
|
dev_addr = (pkt->wValue & 0xff);
|
||||||
|
printf("Set address %d\r\n", dev_addr);
|
||||||
|
// Will set address in the callback phase
|
||||||
|
should_set_address = true;
|
||||||
|
usb_acknowledge_out_request();
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @brief Handles a SET_CONFIGRUATION request from the host. Assumes one configuration so simply
|
||||||
|
* sends a zero length status packet back to the host.
|
||||||
|
*
|
||||||
|
* @param pkt, the setup packet from the host.
|
||||||
|
*/
|
||||||
|
void usb_set_device_configuration(volatile struct usb_setup_packet *pkt) {
|
||||||
|
// Only one configuration so just acknowledge the request
|
||||||
|
printf("Device Enumerated\r\n");
|
||||||
|
usb_acknowledge_out_request();
|
||||||
|
configured = true;
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @brief Respond to a setup packet from the host.
|
||||||
|
*
|
||||||
|
*/
|
||||||
|
void usb_handle_setup_packet(void) {
|
||||||
|
volatile struct usb_setup_packet *pkt = (volatile struct usb_setup_packet *) &usb_dpram->setup_packet;
|
||||||
|
uint8_t req_direction = pkt->bmRequestType & USB_DIR_IN;
|
||||||
|
uint8_t req_type = pkt->bmRequestType & USB_REQ_TYPE_TYPE_MASK;
|
||||||
|
uint8_t req = pkt->bRequest;
|
||||||
|
|
||||||
|
// Reset PID to 1 for EP0 IN
|
||||||
|
usb_get_endpoint_configuration(EP0_IN_ADDR)->next_pid = 1u;
|
||||||
|
|
||||||
|
if (req_type != USB_REQ_TYPE_STANDARD) {
|
||||||
|
printf("NON STANDARD TYPE REQUEST\r\n");
|
||||||
|
}
|
||||||
|
else {
|
||||||
|
if (req_direction == USB_DIR_OUT) {
|
||||||
|
if (req == USB_REQUEST_SET_ADDRESS) {
|
||||||
|
usb_set_device_address(pkt);
|
||||||
|
printf("SET ADDRESS\r\n");
|
||||||
|
} else if (req == USB_REQUEST_SET_CONFIGURATION) {
|
||||||
|
usb_set_device_configuration(pkt);
|
||||||
|
printf("SET CONFIGURATION\r\n");
|
||||||
|
} else {
|
||||||
|
usb_acknowledge_out_request();
|
||||||
|
printf("Other OUT request (0x%x)\r\n", pkt->bRequest);
|
||||||
|
}
|
||||||
|
} else if (req_direction == USB_DIR_IN) {
|
||||||
|
if (req == USB_REQUEST_GET_DESCRIPTOR) {
|
||||||
|
uint16_t descriptor_type = pkt->wValue >> 8;
|
||||||
|
|
||||||
|
switch (descriptor_type) {
|
||||||
|
case USB_DT_DEVICE:
|
||||||
|
usb_handle_device_descriptor(pkt);
|
||||||
|
printf("GET DEVICE DESCRIPTOR\r\n");
|
||||||
|
break;
|
||||||
|
|
||||||
|
case USB_DT_CONFIG:
|
||||||
|
usb_handle_config_descriptor(pkt);
|
||||||
|
printf("GET CONFIG DESCRIPTOR\r\n");
|
||||||
|
break;
|
||||||
|
|
||||||
|
case USB_DT_STRING:
|
||||||
|
usb_handle_string_descriptor(pkt);
|
||||||
|
printf("GET STRING DESCRIPTOR\r\n");
|
||||||
|
break;
|
||||||
|
|
||||||
|
default:
|
||||||
|
printf("Unhandled GET_DESCRIPTOR type 0x%x\r\n", descriptor_type);
|
||||||
|
}
|
||||||
|
} else {
|
||||||
|
printf("Other IN request (0x%x)\r\n", pkt->bRequest);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @brief Notify an endpoint that a transfer has completed.
|
||||||
|
*
|
||||||
|
* @param ep, the endpoint to notify.
|
||||||
|
*/
|
||||||
|
static void usb_handle_ep_buff_done(struct usb_endpoint_configuration *ep) {
|
||||||
|
uint32_t buffer_control = *ep->buffer_control;
|
||||||
|
// Get the transfer length for this endpoint
|
||||||
|
uint16_t len = buffer_control & USB_BUF_CTRL_LEN_MASK;
|
||||||
|
|
||||||
|
// Call that endpoints buffer done handler
|
||||||
|
ep->handler((uint8_t *) ep->data_buffer, len);
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @brief Find the endpoint configuration for a specified endpoint number and
|
||||||
|
* direction and notify it that a transfer has completed.
|
||||||
|
*
|
||||||
|
* @param ep_num
|
||||||
|
* @param in
|
||||||
|
*/
|
||||||
|
static void usb_handle_buff_done(uint ep_num, bool in) {
|
||||||
|
uint8_t ep_addr = ep_num | (in ? USB_DIR_IN : 0);
|
||||||
|
printf("EP %d (in = %d) done\n", ep_num, in);
|
||||||
|
for (uint i = 0; i < USB_NUM_ENDPOINTS; i++) {
|
||||||
|
struct usb_endpoint_configuration *ep = &dev_config.endpoints[i];
|
||||||
|
if (ep->descriptor && ep->handler) {
|
||||||
|
if (ep->descriptor->bEndpointAddress == ep_addr) {
|
||||||
|
usb_handle_ep_buff_done(ep);
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @brief Handle a "buffer status" irq. This means that one or more
|
||||||
|
* buffers have been sent / received. Notify each endpoint where this
|
||||||
|
* is the case.
|
||||||
|
*/
|
||||||
|
static void usb_handle_buff_status() {
|
||||||
|
uint32_t buffers = usb_hw->buf_status;
|
||||||
|
uint32_t remaining_buffers = buffers;
|
||||||
|
|
||||||
|
uint bit = 1u;
|
||||||
|
for (uint i = 0; remaining_buffers && i < USB_NUM_ENDPOINTS * 2; i++) {
|
||||||
|
if (remaining_buffers & bit) {
|
||||||
|
// clear this in advance
|
||||||
|
usb_hw_clear->buf_status = bit;
|
||||||
|
// IN transfer for even i, OUT transfer for odd i
|
||||||
|
usb_handle_buff_done(i >> 1u, !(i & 1u));
|
||||||
|
remaining_buffers &= ~bit;
|
||||||
|
}
|
||||||
|
bit <<= 1u;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @brief USB interrupt handler
|
||||||
|
*
|
||||||
|
*/
|
||||||
|
/// \tag::isr_setup_packet[]
|
||||||
|
void isr_usbctrl(void) {
|
||||||
|
// USB interrupt handler
|
||||||
|
uint32_t status = usb_hw->ints;
|
||||||
|
uint32_t handled = 0;
|
||||||
|
|
||||||
|
// Setup packet received
|
||||||
|
if (status & USB_INTS_SETUP_REQ_BITS) {
|
||||||
|
handled |= USB_INTS_SETUP_REQ_BITS;
|
||||||
|
usb_hw_clear->sie_status = USB_SIE_STATUS_SETUP_REC_BITS;
|
||||||
|
usb_handle_setup_packet();
|
||||||
|
}
|
||||||
|
/// \end::isr_setup_packet[]
|
||||||
|
|
||||||
|
// Buffer status, one or more buffers have completed
|
||||||
|
if (status & USB_INTS_BUFF_STATUS_BITS) {
|
||||||
|
handled |= USB_INTS_BUFF_STATUS_BITS;
|
||||||
|
usb_handle_buff_status();
|
||||||
|
}
|
||||||
|
|
||||||
|
// Bus is reset
|
||||||
|
if (status & USB_INTS_BUS_RESET_BITS) {
|
||||||
|
printf("BUS RESET\n");
|
||||||
|
handled |= USB_INTS_BUS_RESET_BITS;
|
||||||
|
usb_hw_clear->sie_status = USB_SIE_STATUS_BUS_RESET_BITS;
|
||||||
|
usb_bus_reset();
|
||||||
|
}
|
||||||
|
|
||||||
|
if (status ^ handled) {
|
||||||
|
panic("Unhandled IRQ 0x%x\n", (uint) (status ^ handled));
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @brief EP0 in transfer complete. Either finish the SET_ADDRESS process, or receive a zero
|
||||||
|
* length status packet from the host.
|
||||||
|
*
|
||||||
|
* @param buf the data that was sent
|
||||||
|
* @param len the length that was sent
|
||||||
|
*/
|
||||||
|
void ep0_in_handler(uint8_t *buf, uint16_t len) {
|
||||||
|
if (should_set_address) {
|
||||||
|
// Set actual device address in hardware
|
||||||
|
usb_hw->dev_addr_ctrl = dev_addr;
|
||||||
|
should_set_address = false;
|
||||||
|
} else {
|
||||||
|
// Receive a zero length status packet from the host on EP0 OUT
|
||||||
|
struct usb_endpoint_configuration *ep = usb_get_endpoint_configuration(EP0_OUT_ADDR);
|
||||||
|
usb_start_transfer(ep, NULL, 0);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
void ep0_out_handler(uint8_t *buf, uint16_t len) {
|
||||||
|
;
|
||||||
|
}
|
||||||
|
|
||||||
|
// Device specific functions
|
||||||
|
void ep1_out_handler(uint8_t *buf, uint16_t len) {
|
||||||
|
printf("RX %d bytes from host\n", len);
|
||||||
|
// Send data back to host
|
||||||
|
struct usb_endpoint_configuration *ep = usb_get_endpoint_configuration(EP2_IN_ADDR);
|
||||||
|
usb_start_transfer(ep, buf, len);
|
||||||
|
}
|
||||||
|
|
||||||
|
void ep2_in_handler(uint8_t *buf, uint16_t len) {
|
||||||
|
printf("Sent %d bytes to host\n", len);
|
||||||
|
// Get ready to rx again from host
|
||||||
|
usb_start_transfer(usb_get_endpoint_configuration(EP1_OUT_ADDR), NULL, 64);
|
||||||
|
}
|
||||||
|
|
||||||
|
int main(void) {
|
||||||
|
stdio_init_all();
|
||||||
|
printf("USB Device Low-Level hardware example\n");
|
||||||
|
usb_device_init();
|
||||||
|
|
||||||
|
gpio_init(18);
|
||||||
|
gpio_set_dir(18, GPIO_OUT);
|
||||||
|
gpio_init(19);
|
||||||
|
gpio_set_dir(19, GPIO_OUT);
|
||||||
|
gpio_init(20);
|
||||||
|
gpio_set_dir(20, GPIO_OUT);
|
||||||
|
gpio_put(18, 1);
|
||||||
|
gpio_put(19, 1);
|
||||||
|
gpio_put(20, 1);
|
||||||
|
|
||||||
|
|
||||||
|
// Wait until configured
|
||||||
|
while (!configured) {
|
||||||
|
tight_loop_contents();
|
||||||
|
gpio_put(18, 1);
|
||||||
|
sleep_ms(250);
|
||||||
|
gpio_put(18, 0);
|
||||||
|
sleep_ms(250);
|
||||||
|
}
|
||||||
|
|
||||||
|
// Get ready to rx from host
|
||||||
|
usb_start_transfer(usb_get_endpoint_configuration(EP1_OUT_ADDR), NULL, 64);
|
||||||
|
gpio_put(18, 1);
|
||||||
|
gpio_put(19, 1);
|
||||||
|
gpio_put(20, 1);
|
||||||
|
|
||||||
|
// Everything is interrupt driven so just loop here
|
||||||
|
while (1) {
|
||||||
|
tight_loop_contents();
|
||||||
|
|
||||||
|
gpio_put(19, 1);
|
||||||
|
sleep_ms(250);
|
||||||
|
gpio_put(19, 0);
|
||||||
|
sleep_ms(250);
|
||||||
|
}
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
141
hsm2040.h
Normal file
141
hsm2040.h
Normal file
@ -0,0 +1,141 @@
|
|||||||
|
/**
|
||||||
|
* Copyright (c) 2020 Raspberry Pi (Trading) Ltd.
|
||||||
|
*
|
||||||
|
* SPDX-License-Identifier: BSD-3-Clause
|
||||||
|
*/
|
||||||
|
|
||||||
|
#ifndef DEV_LOWLEVEL_H_
|
||||||
|
#define DEV_LOWLEVEL_H_
|
||||||
|
|
||||||
|
#include "usb_common.h"
|
||||||
|
|
||||||
|
// Struct in which we keep the endpoint configuration
|
||||||
|
typedef void (*usb_ep_handler)(uint8_t *buf, uint16_t len);
|
||||||
|
struct usb_endpoint_configuration {
|
||||||
|
const struct usb_endpoint_descriptor *descriptor;
|
||||||
|
usb_ep_handler handler;
|
||||||
|
|
||||||
|
// Pointers to endpoint + buffer control registers
|
||||||
|
// in the USB controller DPSRAM
|
||||||
|
volatile uint32_t *endpoint_control;
|
||||||
|
volatile uint32_t *buffer_control;
|
||||||
|
volatile uint8_t *data_buffer;
|
||||||
|
|
||||||
|
// Toggle after each packet (unless replying to a SETUP)
|
||||||
|
uint8_t next_pid;
|
||||||
|
};
|
||||||
|
|
||||||
|
// Struct in which we keep the device configuration
|
||||||
|
struct usb_device_configuration {
|
||||||
|
const struct usb_device_descriptor *device_descriptor;
|
||||||
|
const struct usb_interface_descriptor *interface_descriptor;
|
||||||
|
const struct usb_configuration_descriptor *config_descriptor;
|
||||||
|
const unsigned char *lang_descriptor;
|
||||||
|
const unsigned char **descriptor_strings;
|
||||||
|
// USB num endpoints is 16
|
||||||
|
struct usb_endpoint_configuration endpoints[USB_NUM_ENDPOINTS];
|
||||||
|
};
|
||||||
|
|
||||||
|
#define EP0_IN_ADDR (USB_DIR_IN | 0)
|
||||||
|
#define EP0_OUT_ADDR (USB_DIR_OUT | 0)
|
||||||
|
#define EP1_OUT_ADDR (USB_DIR_OUT | 1)
|
||||||
|
#define EP2_IN_ADDR (USB_DIR_IN | 2)
|
||||||
|
|
||||||
|
// EP0 IN and OUT
|
||||||
|
static const struct usb_endpoint_descriptor ep0_out = {
|
||||||
|
.bLength = sizeof(struct usb_endpoint_descriptor),
|
||||||
|
.bDescriptorType = USB_DT_ENDPOINT,
|
||||||
|
.bEndpointAddress = EP0_OUT_ADDR, // EP number 0, OUT from host (rx to device)
|
||||||
|
.bmAttributes = USB_TRANSFER_TYPE_CONTROL,
|
||||||
|
.wMaxPacketSize = 64,
|
||||||
|
.bInterval = 0
|
||||||
|
};
|
||||||
|
|
||||||
|
static const struct usb_endpoint_descriptor ep0_in = {
|
||||||
|
.bLength = sizeof(struct usb_endpoint_descriptor),
|
||||||
|
.bDescriptorType = USB_DT_ENDPOINT,
|
||||||
|
.bEndpointAddress = EP0_IN_ADDR, // EP number 0, OUT from host (rx to device)
|
||||||
|
.bmAttributes = USB_TRANSFER_TYPE_CONTROL,
|
||||||
|
.wMaxPacketSize = 64,
|
||||||
|
.bInterval = 0
|
||||||
|
};
|
||||||
|
|
||||||
|
// Descriptors
|
||||||
|
static const struct usb_device_descriptor device_descriptor = {
|
||||||
|
.bLength = sizeof(struct usb_device_descriptor),
|
||||||
|
.bDescriptorType = USB_DT_DEVICE,
|
||||||
|
.bcdUSB = 0x0200, // USB 1.1 device
|
||||||
|
.bDeviceClass = 0, // Specified in interface descriptor
|
||||||
|
.bDeviceSubClass = 0, // No subclass
|
||||||
|
.bDeviceProtocol = 0, // No protocol
|
||||||
|
.bMaxPacketSize0 = 64, // Max packet size for ep0
|
||||||
|
.idVendor = 0x0D46, // Your vendor id
|
||||||
|
.idProduct = 0x3010, // Your product ID
|
||||||
|
.bcdDevice = 0, // No device revision number
|
||||||
|
.iManufacturer = 1, // Manufacturer string index
|
||||||
|
.iProduct = 2, // Product string index
|
||||||
|
.iSerialNumber = 3, // No serial number
|
||||||
|
.bNumConfigurations = 1 // One configuration
|
||||||
|
};
|
||||||
|
|
||||||
|
static const struct usb_interface_descriptor interface_descriptor = {
|
||||||
|
.bLength = sizeof(struct usb_interface_descriptor),
|
||||||
|
.bDescriptorType = USB_DT_INTERFACE,
|
||||||
|
.bInterfaceNumber = 0,
|
||||||
|
.bAlternateSetting = 0,
|
||||||
|
.bNumEndpoints = 2, // Interface has 2 endpoints
|
||||||
|
.bInterfaceClass = 0x0b, // Vendor specific endpoint
|
||||||
|
.bInterfaceSubClass = 0,
|
||||||
|
.bInterfaceProtocol = 0,
|
||||||
|
.iInterface = 4
|
||||||
|
};
|
||||||
|
|
||||||
|
static const struct usb_endpoint_descriptor ep1_out = {
|
||||||
|
.bLength = sizeof(struct usb_endpoint_descriptor),
|
||||||
|
.bDescriptorType = USB_DT_ENDPOINT,
|
||||||
|
.bEndpointAddress = EP1_OUT_ADDR, // EP number 1, OUT from host (rx to device)
|
||||||
|
.bmAttributes = USB_TRANSFER_TYPE_BULK,
|
||||||
|
.wMaxPacketSize = 64,
|
||||||
|
.bInterval = 0
|
||||||
|
};
|
||||||
|
|
||||||
|
static const struct usb_endpoint_descriptor ep2_in = {
|
||||||
|
.bLength = sizeof(struct usb_endpoint_descriptor),
|
||||||
|
.bDescriptorType = USB_DT_ENDPOINT,
|
||||||
|
.bEndpointAddress = EP2_IN_ADDR, // EP number 2, IN from host (tx from device)
|
||||||
|
.bmAttributes = USB_TRANSFER_TYPE_BULK,
|
||||||
|
.wMaxPacketSize = 64,
|
||||||
|
.bInterval = 0
|
||||||
|
};
|
||||||
|
|
||||||
|
static const struct usb_configuration_descriptor config_descriptor = {
|
||||||
|
.bLength = sizeof(struct usb_configuration_descriptor),
|
||||||
|
.bDescriptorType = USB_DT_CONFIG,
|
||||||
|
.wTotalLength = (sizeof(config_descriptor) +
|
||||||
|
sizeof(interface_descriptor) +
|
||||||
|
sizeof(ep1_out) +
|
||||||
|
sizeof(ep2_in)),
|
||||||
|
.bNumInterfaces = 1,
|
||||||
|
.bConfigurationValue = 1, // Configuration 1
|
||||||
|
.iConfiguration = 4, // No string
|
||||||
|
.bmAttributes = 0xc0, // attributes: self powered, no remote wakeup
|
||||||
|
.bMaxPower = 0x32 // 100ma
|
||||||
|
};
|
||||||
|
|
||||||
|
static const unsigned char lang_descriptor[] = {
|
||||||
|
4, // bLength
|
||||||
|
0x03, // bDescriptorType == String Descriptor
|
||||||
|
0x09, 0x04 // language id = us english
|
||||||
|
};
|
||||||
|
|
||||||
|
static const unsigned char *descriptor_strings[] = {
|
||||||
|
(unsigned char *) "Virtual SC", // Vendor
|
||||||
|
(unsigned char *) "CCID", // Product
|
||||||
|
(unsigned char *) "11223344",
|
||||||
|
(unsigned char *) "Configuration rocks",
|
||||||
|
(unsigned char *) "Interface rocks"
|
||||||
|
};
|
||||||
|
|
||||||
|
#define USB_REQ_CCID 0xA1
|
||||||
|
|
||||||
|
#endif
|
62
pico_sdk_import.cmake
Normal file
62
pico_sdk_import.cmake
Normal file
@ -0,0 +1,62 @@
|
|||||||
|
# This is a copy of <PICO_SDK_PATH>/external/pico_sdk_import.cmake
|
||||||
|
|
||||||
|
# This can be dropped into an external project to help locate this SDK
|
||||||
|
# It should be include()ed prior to project()
|
||||||
|
|
||||||
|
if (DEFINED ENV{PICO_SDK_PATH} AND (NOT PICO_SDK_PATH))
|
||||||
|
set(PICO_SDK_PATH $ENV{PICO_SDK_PATH})
|
||||||
|
message("Using PICO_SDK_PATH from environment ('${PICO_SDK_PATH}')")
|
||||||
|
endif ()
|
||||||
|
|
||||||
|
if (DEFINED ENV{PICO_SDK_FETCH_FROM_GIT} AND (NOT PICO_SDK_FETCH_FROM_GIT))
|
||||||
|
set(PICO_SDK_FETCH_FROM_GIT $ENV{PICO_SDK_FETCH_FROM_GIT})
|
||||||
|
message("Using PICO_SDK_FETCH_FROM_GIT from environment ('${PICO_SDK_FETCH_FROM_GIT}')")
|
||||||
|
endif ()
|
||||||
|
|
||||||
|
if (DEFINED ENV{PICO_SDK_FETCH_FROM_GIT_PATH} AND (NOT PICO_SDK_FETCH_FROM_GIT_PATH))
|
||||||
|
set(PICO_SDK_FETCH_FROM_GIT_PATH $ENV{PICO_SDK_FETCH_FROM_GIT_PATH})
|
||||||
|
message("Using PICO_SDK_FETCH_FROM_GIT_PATH from environment ('${PICO_SDK_FETCH_FROM_GIT_PATH}')")
|
||||||
|
endif ()
|
||||||
|
|
||||||
|
set(PICO_SDK_PATH "${PICO_SDK_PATH}" CACHE PATH "Path to the Raspberry Pi Pico SDK")
|
||||||
|
set(PICO_SDK_FETCH_FROM_GIT "${PICO_SDK_FETCH_FROM_GIT}" CACHE BOOL "Set to ON to fetch copy of SDK from git if not otherwise locatable")
|
||||||
|
set(PICO_SDK_FETCH_FROM_GIT_PATH "${PICO_SDK_FETCH_FROM_GIT_PATH}" CACHE FILEPATH "location to download SDK")
|
||||||
|
|
||||||
|
if (NOT PICO_SDK_PATH)
|
||||||
|
if (PICO_SDK_FETCH_FROM_GIT)
|
||||||
|
include(FetchContent)
|
||||||
|
set(FETCHCONTENT_BASE_DIR_SAVE ${FETCHCONTENT_BASE_DIR})
|
||||||
|
if (PICO_SDK_FETCH_FROM_GIT_PATH)
|
||||||
|
get_filename_component(FETCHCONTENT_BASE_DIR "${PICO_SDK_FETCH_FROM_GIT_PATH}" REALPATH BASE_DIR "${CMAKE_SOURCE_DIR}")
|
||||||
|
endif ()
|
||||||
|
FetchContent_Declare(
|
||||||
|
pico_sdk
|
||||||
|
GIT_REPOSITORY https://github.com/raspberrypi/pico-sdk
|
||||||
|
GIT_TAG master
|
||||||
|
)
|
||||||
|
if (NOT pico_sdk)
|
||||||
|
message("Downloading Raspberry Pi Pico SDK")
|
||||||
|
FetchContent_Populate(pico_sdk)
|
||||||
|
set(PICO_SDK_PATH ${pico_sdk_SOURCE_DIR})
|
||||||
|
endif ()
|
||||||
|
set(FETCHCONTENT_BASE_DIR ${FETCHCONTENT_BASE_DIR_SAVE})
|
||||||
|
else ()
|
||||||
|
message(FATAL_ERROR
|
||||||
|
"SDK location was not specified. Please set PICO_SDK_PATH or set PICO_SDK_FETCH_FROM_GIT to on to fetch from git."
|
||||||
|
)
|
||||||
|
endif ()
|
||||||
|
endif ()
|
||||||
|
|
||||||
|
get_filename_component(PICO_SDK_PATH "${PICO_SDK_PATH}" REALPATH BASE_DIR "${CMAKE_BINARY_DIR}")
|
||||||
|
if (NOT EXISTS ${PICO_SDK_PATH})
|
||||||
|
message(FATAL_ERROR "Directory '${PICO_SDK_PATH}' not found")
|
||||||
|
endif ()
|
||||||
|
|
||||||
|
set(PICO_SDK_INIT_CMAKE_FILE ${PICO_SDK_PATH}/pico_sdk_init.cmake)
|
||||||
|
if (NOT EXISTS ${PICO_SDK_INIT_CMAKE_FILE})
|
||||||
|
message(FATAL_ERROR "Directory '${PICO_SDK_PATH}' does not appear to contain the Raspberry Pi Pico SDK")
|
||||||
|
endif ()
|
||||||
|
|
||||||
|
set(PICO_SDK_PATH ${PICO_SDK_PATH} CACHE PATH "Path to the Raspberry Pi Pico SDK" FORCE)
|
||||||
|
|
||||||
|
include(${PICO_SDK_INIT_CMAKE_FILE})
|
134
usb_common.h
Normal file
134
usb_common.h
Normal file
@ -0,0 +1,134 @@
|
|||||||
|
/*
|
||||||
|
* Copyright (c) 2020 Raspberry Pi (Trading) Ltd.
|
||||||
|
*
|
||||||
|
* SPDX-License-Identifier: BSD-3-Clause
|
||||||
|
*/
|
||||||
|
|
||||||
|
#ifndef _USB_COMMON_H
|
||||||
|
#define _USB_COMMON_H
|
||||||
|
|
||||||
|
#include "pico/types.h"
|
||||||
|
#include "hardware/structs/usb.h"
|
||||||
|
|
||||||
|
// bmRequestType bit definitions
|
||||||
|
#define USB_REQ_TYPE_STANDARD 0x00u
|
||||||
|
#define USB_REQ_TYPE_TYPE_MASK 0x60u
|
||||||
|
#define USB_REQ_TYPE_TYPE_CLASS 0x20u
|
||||||
|
#define USB_REQ_TYPE_TYPE_VENDOR 0x40u
|
||||||
|
|
||||||
|
#define USB_REQ_TYPE_RECIPIENT_MASK 0x1fu
|
||||||
|
#define USB_REQ_TYPE_RECIPIENT_DEVICE 0x00u
|
||||||
|
#define USB_REQ_TYPE_RECIPIENT_INTERFACE 0x01u
|
||||||
|
#define USB_REQ_TYPE_RECIPIENT_ENDPOINT 0x02u
|
||||||
|
|
||||||
|
#define USB_DIR_OUT 0x00u
|
||||||
|
#define USB_DIR_IN 0x80u
|
||||||
|
|
||||||
|
#define USB_TRANSFER_TYPE_CONTROL 0x0
|
||||||
|
#define USB_TRANSFER_TYPE_ISOCHRONOUS 0x1
|
||||||
|
#define USB_TRANSFER_TYPE_BULK 0x2
|
||||||
|
#define USB_TRANSFER_TYPE_INTERRUPT 0x3
|
||||||
|
#define USB_TRANSFER_TYPE_BITS 0x3
|
||||||
|
|
||||||
|
// Descriptor types
|
||||||
|
#define USB_DT_DEVICE 0x01
|
||||||
|
#define USB_DT_CONFIG 0x02
|
||||||
|
#define USB_DT_STRING 0x03
|
||||||
|
#define USB_DT_INTERFACE 0x04
|
||||||
|
#define USB_DT_ENDPOINT 0x05
|
||||||
|
|
||||||
|
#define USB_REQUEST_GET_STATUS 0x0
|
||||||
|
#define USB_REQUEST_CLEAR_FEATURE 0x01
|
||||||
|
#define USB_REQUEST_SET_FEATURE 0x03
|
||||||
|
#define USB_REQUEST_SET_ADDRESS 0x05
|
||||||
|
#define USB_REQUEST_GET_DESCRIPTOR 0x06
|
||||||
|
#define USB_REQUEST_SET_DESCRIPTOR 0x07
|
||||||
|
#define USB_REQUEST_GET_CONFIGURATION 0x08
|
||||||
|
#define USB_REQUEST_SET_CONFIGURATION 0x09
|
||||||
|
#define USB_REQUEST_GET_INTERFACE 0x0a
|
||||||
|
#define USB_REQUEST_SET_INTERFACE 0x0b
|
||||||
|
#define USB_REQUEST_SYNC_FRAME 0x0c
|
||||||
|
|
||||||
|
#define USB_REQUEST_MSC_GET_MAX_LUN 0xfe
|
||||||
|
#define USB_REQUEST_MSC_RESET 0xff
|
||||||
|
|
||||||
|
#define USB_FEAT_ENDPOINT_HALT 0x00
|
||||||
|
#define USB_FEAT_DEVICE_REMOTE_WAKEUP 0x01
|
||||||
|
#define USB_FEAT_TEST_MODE 0x02
|
||||||
|
|
||||||
|
#define USB_DESCRIPTOR_TYPE_ENDPOINT 0x05
|
||||||
|
|
||||||
|
struct usb_setup_packet {
|
||||||
|
uint8_t bmRequestType;
|
||||||
|
uint8_t bRequest;
|
||||||
|
uint16_t wValue;
|
||||||
|
uint16_t wIndex;
|
||||||
|
uint16_t wLength;
|
||||||
|
} __packed;
|
||||||
|
|
||||||
|
struct usb_descriptor {
|
||||||
|
uint8_t bLength;
|
||||||
|
uint8_t bDescriptorType;
|
||||||
|
};
|
||||||
|
|
||||||
|
struct usb_device_descriptor {
|
||||||
|
uint8_t bLength;
|
||||||
|
uint8_t bDescriptorType;
|
||||||
|
uint16_t bcdUSB;
|
||||||
|
uint8_t bDeviceClass;
|
||||||
|
uint8_t bDeviceSubClass;
|
||||||
|
uint8_t bDeviceProtocol;
|
||||||
|
uint8_t bMaxPacketSize0;
|
||||||
|
uint16_t idVendor;
|
||||||
|
uint16_t idProduct;
|
||||||
|
uint16_t bcdDevice;
|
||||||
|
uint8_t iManufacturer;
|
||||||
|
uint8_t iProduct;
|
||||||
|
uint8_t iSerialNumber;
|
||||||
|
uint8_t bNumConfigurations;
|
||||||
|
} __packed;
|
||||||
|
|
||||||
|
struct usb_configuration_descriptor {
|
||||||
|
uint8_t bLength;
|
||||||
|
uint8_t bDescriptorType;
|
||||||
|
uint16_t wTotalLength;
|
||||||
|
uint8_t bNumInterfaces;
|
||||||
|
uint8_t bConfigurationValue;
|
||||||
|
uint8_t iConfiguration;
|
||||||
|
uint8_t bmAttributes;
|
||||||
|
uint8_t bMaxPower;
|
||||||
|
} __packed;
|
||||||
|
|
||||||
|
struct usb_interface_descriptor {
|
||||||
|
uint8_t bLength;
|
||||||
|
uint8_t bDescriptorType;
|
||||||
|
uint8_t bInterfaceNumber;
|
||||||
|
uint8_t bAlternateSetting;
|
||||||
|
uint8_t bNumEndpoints;
|
||||||
|
uint8_t bInterfaceClass;
|
||||||
|
uint8_t bInterfaceSubClass;
|
||||||
|
uint8_t bInterfaceProtocol;
|
||||||
|
uint8_t iInterface;
|
||||||
|
} __packed;
|
||||||
|
|
||||||
|
struct usb_endpoint_descriptor {
|
||||||
|
uint8_t bLength;
|
||||||
|
uint8_t bDescriptorType;
|
||||||
|
uint8_t bEndpointAddress;
|
||||||
|
uint8_t bmAttributes;
|
||||||
|
uint16_t wMaxPacketSize;
|
||||||
|
uint8_t bInterval;
|
||||||
|
} __packed;
|
||||||
|
|
||||||
|
struct usb_endpoint_descriptor_long {
|
||||||
|
uint8_t bLength;
|
||||||
|
uint8_t bDescriptorType;
|
||||||
|
uint8_t bEndpointAddress;
|
||||||
|
uint8_t bmAttributes;
|
||||||
|
uint16_t wMaxPacketSize;
|
||||||
|
uint8_t bInterval;
|
||||||
|
uint8_t bRefresh;
|
||||||
|
uint8_t bSyncAddr;
|
||||||
|
} __attribute__((packed));
|
||||||
|
|
||||||
|
#endif
|
Loading…
Reference in New Issue
Block a user