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252 lines
7.4 KiB
C
252 lines
7.4 KiB
C
/******************** (C) COPYRIGHT 2010 STMicroelectronics ********************
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* File Name : usb_pwr.c
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* Author : MCD Application Team
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* Version : V3.1.1
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* Date : 04/07/2010
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* Description : Connection/disconnection & power management
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********************************************************************************
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* THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
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* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME.
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* AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT,
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* INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE
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* CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING
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* INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
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*******************************************************************************/
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/* Includes ------------------------------------------------------------------*/
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#include "stm32f10x.h"
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#include "usb_lib.h"
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#include "usb_conf.h"
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#include "usb_pwr.h"
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#include "hw_config.h"
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/* Private typedef -----------------------------------------------------------*/
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/* Private define ------------------------------------------------------------*/
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/* Private macro -------------------------------------------------------------*/
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/* Private variables ---------------------------------------------------------*/
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__IO uint32_t bDeviceState = UNCONNECTED; /* USB device status */
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__IO bool fSuspendEnabled = TRUE; /* true when suspend is possible */
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struct
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{
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__IO RESUME_STATE eState;
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__IO uint8_t bESOFcnt;
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}ResumeS;
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/* Extern variables ----------------------------------------------------------*/
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/* Private function prototypes -----------------------------------------------*/
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/* Extern function prototypes ------------------------------------------------*/
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/* Private functions ---------------------------------------------------------*/
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/*******************************************************************************
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* Function Name : PowerOn
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* Description :
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* Input : None.
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* Output : None.
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* Return : USB_SUCCESS.
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*******************************************************************************/
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RESULT PowerOn(void)
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{
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#ifndef STM32F10X_CL
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uint16_t wRegVal;
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/*** cable plugged-in ? ***/
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USB_Cable_Config(ENABLE);
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/*** CNTR_PWDN = 0 ***/
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wRegVal = CNTR_FRES;
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_SetCNTR(wRegVal);
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/*** CNTR_FRES = 0 ***/
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wInterrupt_Mask = 0;
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_SetCNTR(wInterrupt_Mask);
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/*** Clear pending interrupts ***/
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_SetISTR(0);
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/*** Set interrupt mask ***/
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wInterrupt_Mask = CNTR_RESETM | CNTR_SUSPM | CNTR_WKUPM;
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_SetCNTR(wInterrupt_Mask);
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#endif /* STM32F10X_CL */
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return USB_SUCCESS;
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}
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/*******************************************************************************
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* Function Name : PowerOff
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* Description : handles switch-off conditions
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* Input : None.
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* Output : None.
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* Return : USB_SUCCESS.
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*******************************************************************************/
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RESULT PowerOff()
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{
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#ifndef STM32F10X_CL
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/* disable all ints and force USB reset */
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_SetCNTR(CNTR_FRES);
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/* clear interrupt status register */
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_SetISTR(0);
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/* Disable the Pull-Up*/
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USB_Cable_Config(DISABLE);
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/* switch-off device */
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_SetCNTR(CNTR_FRES + CNTR_PDWN);
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#endif /* STM32F10X_CL */
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/* sw variables reset */
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/* ... */
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return USB_SUCCESS;
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}
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/*******************************************************************************
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* Function Name : Suspend
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* Description : sets suspend mode operating conditions
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* Input : None.
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* Output : None.
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* Return : USB_SUCCESS.
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*******************************************************************************/
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void Suspend(void)
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{
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#ifndef STM32F10X_CL
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uint16_t wCNTR;
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/* suspend preparation */
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/* ... */
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/* macrocell enters suspend mode */
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wCNTR = _GetCNTR();
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wCNTR |= CNTR_FSUSP;
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_SetCNTR(wCNTR);
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#endif /* STM32F10X_CL */
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/* ------------------ ONLY WITH BUS-POWERED DEVICES ---------------------- */
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/* power reduction */
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/* ... on connected devices */
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#ifndef STM32F10X_CL
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/* force low-power mode in the macrocell */
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wCNTR = _GetCNTR();
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wCNTR |= CNTR_LPMODE;
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_SetCNTR(wCNTR);
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#endif /* STM32F10X_CL */
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/* switch-off the clocks */
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/* ... */
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Enter_LowPowerMode();
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}
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/*******************************************************************************
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* Function Name : Resume_Init
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* Description : Handles wake-up restoring normal operations
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* Input : None.
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* Output : None.
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* Return : USB_SUCCESS.
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*******************************************************************************/
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void Resume_Init(void)
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{
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#ifndef STM32F10X_CL
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uint16_t wCNTR;
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#endif /* STM32F10X_CL */
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/* ------------------ ONLY WITH BUS-POWERED DEVICES ---------------------- */
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/* restart the clocks */
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/* ... */
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#ifndef STM32F10X_CL
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/* CNTR_LPMODE = 0 */
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wCNTR = _GetCNTR();
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wCNTR &= (~CNTR_LPMODE);
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_SetCNTR(wCNTR);
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#endif /* STM32F10X_CL */
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/* restore full power */
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/* ... on connected devices */
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Leave_LowPowerMode();
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#ifndef STM32F10X_CL
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/* reset FSUSP bit */
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_SetCNTR(IMR_MSK);
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#endif /* STM32F10X_CL */
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/* reverse suspend preparation */
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/* ... */
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}
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/*******************************************************************************
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* Function Name : Resume
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* Description : This is the state machine handling resume operations and
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* timing sequence. The control is based on the Resume structure
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* variables and on the ESOF interrupt calling this subroutine
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* without changing machine state.
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* Input : a state machine value (RESUME_STATE)
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* RESUME_ESOF doesn't change ResumeS.eState allowing
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* decrementing of the ESOF counter in different states.
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* Output : None.
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* Return : None.
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*******************************************************************************/
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void Resume(RESUME_STATE eResumeSetVal)
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{
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#ifndef STM32F10X_CL
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uint16_t wCNTR;
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#endif /* STM32F10X_CL */
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if (eResumeSetVal != RESUME_ESOF)
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ResumeS.eState = eResumeSetVal;
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switch (ResumeS.eState)
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{
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case RESUME_EXTERNAL:
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Resume_Init();
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ResumeS.eState = RESUME_OFF;
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break;
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case RESUME_INTERNAL:
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Resume_Init();
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ResumeS.eState = RESUME_START;
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break;
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case RESUME_LATER:
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ResumeS.bESOFcnt = 2;
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ResumeS.eState = RESUME_WAIT;
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break;
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case RESUME_WAIT:
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ResumeS.bESOFcnt--;
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if (ResumeS.bESOFcnt == 0)
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ResumeS.eState = RESUME_START;
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break;
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case RESUME_START:
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#ifdef STM32F10X_CL
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OTGD_FS_Dev_SetRemoteWakeup();
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#else
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wCNTR = _GetCNTR();
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wCNTR |= CNTR_RESUME;
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_SetCNTR(wCNTR);
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#endif /* STM32F10X_CL */
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ResumeS.eState = RESUME_ON;
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ResumeS.bESOFcnt = 10;
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break;
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case RESUME_ON:
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#ifndef STM32F10X_CL
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ResumeS.bESOFcnt--;
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if (ResumeS.bESOFcnt == 0)
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{
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#endif /* STM32F10X_CL */
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#ifdef STM32F10X_CL
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OTGD_FS_Dev_ResetRemoteWakeup();
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#else
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wCNTR = _GetCNTR();
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wCNTR &= (~CNTR_RESUME);
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_SetCNTR(wCNTR);
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#endif /* STM32F10X_CL */
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ResumeS.eState = RESUME_OFF;
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#ifndef STM32F10X_CL
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}
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#endif /* STM32F10X_CL */
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break;
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case RESUME_OFF:
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case RESUME_ESOF:
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default:
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ResumeS.eState = RESUME_OFF;
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break;
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}
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}
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/******************* (C) COPYRIGHT 2010 STMicroelectronics *****END OF FILE****/
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