mirror of
https://github.com/im-tomu/fomu-workshop.git
synced 2024-09-20 03:10:12 +00:00
add migen examples for blink and blink-expanded
This commit is contained in:
Pascal Mainini
parent
d42d25121a
commit
b009e1c533
140
migen/blink-expanded.py
Executable file
140
migen/blink-expanded.py
Executable file
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#!/usr/bin/env python3
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"""Simple tri-colour LED blink example."""
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# Import lxbuildenv to integrate the deps/ directory
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import os, sys
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sys.path.insert(0, os.path.dirname(__file__))
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import lxbuildenv
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from migen import *
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from migen.build.generic_platform import *
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import fomu
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if 'FOMU_REV' not in os.environ:
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print('Board type must be specified in FOMU_REV environment variable!')
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exit(1)
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#
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# Parameters from iCE40 UltraPlus LED Driver Usage Guide, pages 19-20
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#
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# Current modes
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RGBA_CURRENT_MODE_FULL = '0b0'
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RGBA_CURRENT_MODE_HALF = '0b1'
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# Current levels in Full / Half mode
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RGBA_CURRENT_04MA_02MA = '0b000001'
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RGBA_CURRENT_08MA_04MA = '0b000011'
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RGBA_CURRENT_12MA_06MA = '0b000111'
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RGBA_CURRENT_16MA_08MA = '0b001111'
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RGBA_CURRENT_20MA_10MA = '0b011111'
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RGBA_CURRENT_24MA_12MA = '0b111111'
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# Type for input pins, from ICE Technology Library Manual, pages 87-90
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SB_IO_TYPE_SIMPLE_INPUT = 0b000001
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#
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# Signals
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#
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counter = Signal(28)
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rgb0_pwm = Signal(1)
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rgb1_pwm = Signal(1)
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rgb2_pwm = Signal(1)
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input1 = Signal(1)
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input2 = Signal(1)
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# Setup platform and correctly map pins for the
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# iCE40UP5K SB_RGBA_DRV hard macro.
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if os.environ['FOMU_REV'] in ['evt1', 'evt2']:
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platform = fomu.FomuEvt2Platform()
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blue_pwm = rgb0_pwm
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red_pwm = rgb1_pwm
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green_pwm = rgb2_pwm
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elif os.environ['FOMU_REV'] == 'evt3':
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platform = fomu.FomuEvt3Platform()
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blue_pwm = rgb0_pwm
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red_pwm = rgb1_pwm
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green_pwm = rgb2_pwm
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elif os.environ['FOMU_REV'] == 'hacker':
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platform = fomu.FomuHackerPlatform()
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blue_pwm = rgb0_pwm
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green_pwm = rgb1_pwm
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red_pwm = rgb2_pwm
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elif os.environ['FOMU_REV'] == 'pvt':
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platform = fomu.FomuPvtPlatform()
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green_pwm = rgb0_pwm
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red_pwm = rgb1_pwm
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blue_pwm = rgb2_pwm
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else:
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print('Board not supported!')
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exit(2)
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usb_pins = platform.request('usb')
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rgb_pins = platform.request('rgb_led')
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touch_pins = [platform.request('user_touch_n', i) for i in range(0, 4)]
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m = Module()
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###
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# Drive the USB outputs to constant values as they are not in use.
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# Assign USB pins to "0" so as to disconnect Fomu from
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# the host system. Otherwise it would try to talk to
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# us over USB, which wouldn't work since we have no stack.
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m.comb += [usb_pins.d_p.eq(0),
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usb_pins.d_n.eq(0),
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usb_pins.pullup.eq(0)]
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# Use touch pins 1+2 to ground pulled-up inputs
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m.comb += [touch_pins[1].eq(0),
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touch_pins[2].eq(0)]
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# Wire inputs and clock divider to LEDs
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m.comb += [red_pwm.eq(~input2),
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green_pwm.eq(counter[23]),
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blue_pwm.eq(~input1)]
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# Increment counter on clock signal
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m.sync += counter.eq(counter + 1)
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# Instantiate iCE40 LED driver hard logic, connecting up
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# latched button state, counter state, and LEDs.
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#
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# Note that it's possible to drive the LEDs directly,
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# however that is not current-limited and results in
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# overvolting the red LED.
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#
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# See also:
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# https://www.latticesemi.com/-/media/LatticeSemi/Documents/ApplicationNotes/IK/ICE40LEDDriverUsageGuide.ashx?document_id=50668
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m.specials += Instance('SB_RGBA_DRV',
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i_CURREN=0b1,
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i_RGBLEDEN=0b1,
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i_RGB0PWM=rgb0_pwm,
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i_RGB1PWM=rgb1_pwm,
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i_RGB2PWM=rgb2_pwm,
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o_RGB0=rgb_pins.r,
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o_RGB1=rgb_pins.g,
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o_RGB2=rgb_pins.b,
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p_CURRENT_MODE=RGBA_CURRENT_MODE_HALF,
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p_RGB0_CURRENT=RGBA_CURRENT_08MA_04MA,
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p_RGB1_CURRENT=RGBA_CURRENT_08MA_04MA,
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p_RGB2_CURRENT=RGBA_CURRENT_08MA_04MA)
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m.specials += Instance('SB_IO',
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i_PACKAGE_PIN=touch_pins[0],
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i_OUTPUT_ENABLE=0b0,
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o_D_IN_0=input1,
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p_PIN_TYPE=SB_IO_TYPE_SIMPLE_INPUT,
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p_PULLUP=0b1)
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m.specials += Instance('SB_IO',
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i_PACKAGE_PIN=touch_pins[3],
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i_OUTPUT_ENABLE=0b0,
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o_D_IN_0=input2,
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p_PIN_TYPE=SB_IO_TYPE_SIMPLE_INPUT,
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p_PULLUP=0b1)
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platform.build(m)
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112
migen/blink.py
Executable file
112
migen/blink.py
Executable file
@ -0,0 +1,112 @@
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#!/usr/bin/env python3
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"""Simple tri-colour LED blink example."""
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# Import lxbuildenv to integrate the deps/ directory
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import os, sys
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sys.path.insert(0, os.path.dirname(__file__))
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import lxbuildenv
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from migen import *
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import fomu
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if 'FOMU_REV' not in os.environ:
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print('Board type must be specified in FOMU_REV environment variable!')
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exit(1)
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#
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# Parameters from iCE40 UltraPlus LED Driver Usage Guide, pages 19-20
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#
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# Current modes
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RGBA_CURRENT_MODE_FULL = '0b0'
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RGBA_CURRENT_MODE_HALF = '0b1'
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# Current levels in Full / Half mode
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RGBA_CURRENT_04MA_02MA = '0b000001'
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RGBA_CURRENT_08MA_04MA = '0b000011'
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RGBA_CURRENT_12MA_06MA = '0b000111'
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RGBA_CURRENT_16MA_08MA = '0b001111'
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RGBA_CURRENT_20MA_10MA = '0b011111'
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RGBA_CURRENT_24MA_12MA = '0b111111'
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#
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# Signals
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#
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counter = Signal(28)
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rgb0_pwm = Signal(1)
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rgb1_pwm = Signal(1)
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rgb2_pwm = Signal(1)
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# Setup platform and correctly map pins for the
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# iCE40UP5K SB_RGBA_DRV hard macro.
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if os.environ['FOMU_REV'] in ['evt1', 'evt2']:
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platform = fomu.FomuEvt2Platform()
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blue_pwm = rgb0_pwm
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red_pwm = rgb1_pwm
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green_pwm = rgb2_pwm
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elif os.environ['FOMU_REV'] == 'evt3':
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platform = fomu.FomuEvt3Platform()
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blue_pwm = rgb0_pwm
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red_pwm = rgb1_pwm
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green_pwm = rgb2_pwm
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elif os.environ['FOMU_REV'] == 'hacker':
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platform = fomu.FomuHackerPlatform()
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blue_pwm = rgb0_pwm
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green_pwm = rgb1_pwm
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red_pwm = rgb2_pwm
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elif os.environ['FOMU_REV'] == 'pvt':
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platform = fomu.FomuPvtPlatform()
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green_pwm = rgb0_pwm
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red_pwm = rgb1_pwm
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blue_pwm = rgb2_pwm
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else:
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print('Board not supported!')
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exit(2)
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usb_pins = platform.request('usb')
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rgb_pins = platform.request('rgb_led')
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m = Module()
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###
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# Drive the USB outputs to constant values as they are not in use.
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# Assign USB pins to "0" so as to disconnect Fomu from
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# the host system. Otherwise it would try to talk to
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# us over USB, which wouldn't work since we have no stack.
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m.comb += [usb_pins.d_p.eq(0),
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usb_pins.d_n.eq(0),
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usb_pins.pullup.eq(0)]
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m.comb += [red_pwm.eq(counter[24]),
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green_pwm.eq(counter[23]),
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blue_pwm.eq(counter[25])]
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# Increment counter on clock signal
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m.sync += counter.eq(counter + 1)
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# Instantiate iCE40 LED driver hard logic, connecting up
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# latched button state, counter state, and LEDs.
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#
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# Note that it's possible to drive the LEDs directly,
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# however that is not current-limited and results in
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# overvolting the red LED.
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#
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# See also:
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# https://www.latticesemi.com/-/media/LatticeSemi/Documents/ApplicationNotes/IK/ICE40LEDDriverUsageGuide.ashx?document_id=50668
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m.specials += Instance('SB_RGBA_DRV',
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i_CURREN=0b1,
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i_RGBLEDEN=0b1,
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i_RGB0PWM=rgb0_pwm,
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i_RGB1PWM=rgb1_pwm,
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i_RGB2PWM=rgb2_pwm,
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o_RGB0=rgb_pins.r,
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o_RGB1=rgb_pins.g,
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o_RGB2=rgb_pins.b,
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p_CURRENT_MODE=RGBA_CURRENT_MODE_HALF,
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p_RGB0_CURRENT=RGBA_CURRENT_08MA_04MA,
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p_RGB1_CURRENT=RGBA_CURRENT_08MA_04MA,
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p_RGB2_CURRENT=RGBA_CURRENT_08MA_04MA)
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platform.build(m)
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141
migen/fomu.py
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141
migen/fomu.py
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@ -0,0 +1,141 @@
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""" Fomu board definitions (mapping of I/O pins, clock, etc.) """
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from migen import *
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from migen.build.generic_platform import *
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from migen.build.lattice import LatticePlatform
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class FomuPvtPlatform(LatticePlatform):
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""" Based on
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https://github.com/litex-hub/litex-boards/blob/master/litex_boards/partner/platforms/fomu_pvt.py """
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_io = [
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('clk48', 0, Pins('F4'), IOStandard('LVCMOS33')),
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('user_led_n', 0, Pins('A5'), IOStandard('LVCMOS33')),
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('rgb_led', 0,
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Subsignal('r', Pins('C5')),
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Subsignal('g', Pins('B5')),
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Subsignal('b', Pins('A5')),
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IOStandard('LVCMOS33')),
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('user_touch_n', 0, Pins('E4'), IOStandard('LVCMOS33')),
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('user_touch_n', 1, Pins('D5'), IOStandard('LVCMOS33')),
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('user_touch_n', 2, Pins('E5'), IOStandard('LVCMOS33')),
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('user_touch_n', 3, Pins('F5'), IOStandard('LVCMOS33')),
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('usb', 0,
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Subsignal('d_p', Pins('A1')),
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Subsignal('d_n', Pins('A2')),
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Subsignal('pullup', Pins('A4')),
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IOStandard('LVCMOS33'))
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]
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_connectors = [
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('touch_pins', 'E4 D5 E5 F5')
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]
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default_clk_name = 'clk48'
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default_clk_period = 1e9 / 48e6
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def __init__(self):
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LatticePlatform.__init__(self,
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'ice40-up5k-uwg30',
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self._io,
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self._connectors,
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toolchain='icestorm')
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def create_programmer(self):
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return IceStormProgrammer()
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class FomuHackerPlatform(LatticePlatform):
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""" Based on
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https://github.com/litex-hub/litex-boards/blob/master/litex_boards/partner/platforms/fomu_hacker.py """
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_io = [
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('clk48', 0, Pins('F5'), IOStandard('LVCMOS33')),
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('user_led_n', 0, Pins('A5'), IOStandard('LVCMOS33')),
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('rgb_led', 0,
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Subsignal('r', Pins('C5')),
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Subsignal('g', Pins('B5')),
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Subsignal('b', Pins('A5')),
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IOStandard('LVCMOS33')),
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('user_touch_n', 0, Pins('F4'), IOStandard('LVCMOS33')),
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('user_touch_n', 1, Pins('E5'), IOStandard('LVCMOS33')),
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('user_touch_n', 2, Pins('E4'), IOStandard('LVCMOS33')),
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('user_touch_n', 3, Pins('F2'), IOStandard('LVCMOS33')),
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('usb', 0,
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Subsignal('d_p', Pins('A4')),
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Subsignal('d_n', Pins('A2')),
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Subsignal('pullup', Pins('D5')),
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IOStandard('LVCMOS33'))
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]
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_connectors = [
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('touch_pins', 'F4 E5 E4 F2')
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]
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default_clk_name = 'clk48'
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default_clk_period = 1e9 / 48e6
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def __init__(self):
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LatticePlatform.__init__(self,
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'ice40-up5k-uwg30',
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self._io,
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self._connectors,
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toolchain='icestorm')
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def create_programmer(self):
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return IceStormProgrammer()
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class FomuEvt2Platform(LatticePlatform):
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""" Based on
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https://github.com/litex-hub/litex-boards/blob/master/litex_boards/partner/platforms/fomu_evt.py """
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_io = [
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('clk48', 0, Pins('44'), IOStandard('LVCMOS33')),
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('user_led_n', 0, Pins('41'), IOStandard('LVCMOS33')),
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('rgb_led', 0,
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Subsignal('r', Pins('40')),
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Subsignal('g', Pins('39')),
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Subsignal('b', Pins('41')),
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IOStandard('LVCMOS33')),
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('user_touch_n', 0, Pins('48'), IOStandard('LVCMOS33')),
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('user_touch_n', 1, Pins('47'), IOStandard('LVCMOS33')),
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('user_touch_n', 2, Pins('46'), IOStandard('LVCMOS33')),
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('user_touch_n', 3, Pins('45'), IOStandard('LVCMOS33')),
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('usb', 0,
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Subsignal('d_p', Pins('34')),
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Subsignal('d_n', Pins('37')),
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Subsignal('pullup', Pins('35')),
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Subsignal('pulldown', Pins('36')),
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IOStandard('LVCMOS33'))
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]
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_connectors = [
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('touch_pins', '48 47 46 45')
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]
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default_clk_name = 'clk48'
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default_clk_period = 1e9 / 48e6
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def __init__(self):
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LatticePlatform.__init__(self,
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'ice40-up5k-sg48',
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self._io,
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self._connectors,
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toolchain='icestorm')
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def create_programmer(self):
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return IceStormProgrammer()
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FomuEvt3Platform = FomuEvt2Platform
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