mirror of
https://github.com/tillitis/tillitis-key1.git
synced 2025-08-04 20:54:17 -04:00
Make the flash sleep function toggleable
This commit is contained in:
Matthew Mets
Michael Cardell Widerkrantz
parent
c81b186c10
commit
04be27f6a7
1 changed files with 466 additions and 469 deletions
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@ -456,6 +456,63 @@ def bitstream2nvcm(bitstream):
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return rows
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def sleep_flash():
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# Disable board power
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flasher.gpio_put(tp1_pins['5v_en'], False)
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flasher.gpio_set_direction(tp1_pins['5v_en'], True)
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# Pull CRST low to prevent FPGA from starting
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flasher.gpio_set_direction(tp1_pins['crst'], True)
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flasher.gpio_put(tp1_pins['crst'], False)
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# Enable board power
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flasher.gpio_put(tp1_pins['5v_en'], True)
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# Configure pins for talking to flash
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flasher.gpio_set_direction(tp1_pins['ss'], True)
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flasher.gpio_set_direction(tp1_pins['mosi'], False)
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flasher.gpio_set_direction(tp1_pins['sck'], True)
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flasher.gpio_set_direction(tp1_pins['miso'], True)
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flasher.gpio_put(tp1_pins['ss'], False)
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flasher.spi_bitbang(sck_pin=tp1_pins['sck'], mosi_pin=tp1_pins['miso'], miso_pin=tp1_pins['mosi'], buf=[0xAB])
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flasher.gpio_put(tp1_pins['ss'], True)
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# Confirm we can talk to flash
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flasher.gpio_put(tp1_pins['ss'], False)
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data = flasher.spi_bitbang(sck_pin=tp1_pins['sck'], mosi_pin=tp1_pins['miso'], miso_pin=tp1_pins['mosi'], buf=[0x9f, 0,0])
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flasher.gpio_put(tp1_pins['ss'], True)
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print('flash ID while awake:', ' '.join(['{:02x}'.format(b) for b in data]))
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assert(data == bytes([0xff, 0xef, 0x40]))
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# Test that the flash will ignore a sleep command that doesn't start on the first byte
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flasher.gpio_put(tp1_pins['ss'], False)
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flasher.spi_bitbang(sck_pin=tp1_pins['sck'], mosi_pin=tp1_pins['miso'], miso_pin=tp1_pins['mosi'], buf=[0, 0xb9])
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flasher.gpio_put(tp1_pins['ss'], True)
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# Confirm we can talk to flash
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flasher.gpio_put(tp1_pins['ss'], False)
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data = flasher.spi_bitbang(sck_pin=tp1_pins['sck'], mosi_pin=tp1_pins['miso'], miso_pin=tp1_pins['mosi'], buf=[0x9f, 0,0])
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flasher.gpio_put(tp1_pins['ss'], True)
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print('flash ID while awake:', ' '.join(['{:02x}'.format(b) for b in data]))
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assert(data == bytes([0xff, 0xef, 0x40]))
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# put the flash to sleep
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flasher.gpio_put(tp1_pins['ss'], False)
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flasher.spi_bitbang(sck_pin=tp1_pins['sck'], mosi_pin=tp1_pins['miso'], miso_pin=tp1_pins['mosi'], buf=[0xb9])
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flasher.gpio_put(tp1_pins['ss'], True)
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# Confirm flash is asleep
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flasher.gpio_put(tp1_pins['ss'], False)
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data = flasher.spi_bitbang(sck_pin=tp1_pins['sck'], mosi_pin=tp1_pins['miso'], miso_pin=tp1_pins['mosi'], buf=[0x9f, 0,0])
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flasher.gpio_put(tp1_pins['ss'], True)
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print('flash ID while asleep:', ' '.join(['{:02x}'.format(b) for b in data]))
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assert(data == bytes([0xff, 0xff, 0xff]))
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if __name__ == "__main__":
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import argparse
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@ -472,6 +529,11 @@ if __name__ == "__main__":
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action='store_true',
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help='Show debug information and serial read/writes')
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parser.add_argument('-f', '--sleep_flash',
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dest='sleep_flash',
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action='store_true',
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help='Put an attached SPI flash chip in deep sleep before programming FPGA')
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parser.add_argument('-b', '--boot',
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dest='do_boot',
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action='store_true',
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@ -552,62 +614,8 @@ if __name__ == "__main__":
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# for pin in tp1_pins:
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# flasher.gpio_set_direction(tp1_pins[pin], False)
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# Disable board power
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flasher.gpio_put(tp1_pins['5v_en'], False)
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flasher.gpio_set_direction(tp1_pins['5v_en'], True)
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# Pull CRST low to prevent FPGA from starting
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flasher.gpio_set_direction(tp1_pins['crst'], True)
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flasher.gpio_put(tp1_pins['crst'], False)
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sleep(1)
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# Enable board power
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flasher.gpio_put(tp1_pins['5v_en'], True)
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# Configure pins for talking to flash
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flasher.gpio_set_direction(tp1_pins['ss'], True)
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flasher.gpio_set_direction(tp1_pins['mosi'], False)
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flasher.gpio_set_direction(tp1_pins['sck'], True)
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flasher.gpio_set_direction(tp1_pins['miso'], True)
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flasher.gpio_put(tp1_pins['ss'], False)
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flasher.spi_bitbang(sck_pin=tp1_pins['sck'], mosi_pin=tp1_pins['miso'], miso_pin=tp1_pins['mosi'], buf=[0xAB])
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flasher.gpio_put(tp1_pins['ss'], True)
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# Confirm we can talk to flash
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flasher.gpio_put(tp1_pins['ss'], False)
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data = flasher.spi_bitbang(sck_pin=tp1_pins['sck'], mosi_pin=tp1_pins['miso'], miso_pin=tp1_pins['mosi'], buf=[0x9f, 0,0])
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flasher.gpio_put(tp1_pins['ss'], True)
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print('flash ID while awake:', ' '.join(['{:02x}'.format(b) for b in data]))
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assert(data == bytes([0xff, 0xef, 0x40]))
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# Test that the flash will ignore a sleep command that doesn't start on the first byte
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flasher.gpio_put(tp1_pins['ss'], False)
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flasher.spi_bitbang(sck_pin=tp1_pins['sck'], mosi_pin=tp1_pins['miso'], miso_pin=tp1_pins['mosi'], buf=[0, 0xb9])
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flasher.gpio_put(tp1_pins['ss'], True)
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# Confirm we can talk to flash
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flasher.gpio_put(tp1_pins['ss'], False)
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data = flasher.spi_bitbang(sck_pin=tp1_pins['sck'], mosi_pin=tp1_pins['miso'], miso_pin=tp1_pins['mosi'], buf=[0x9f, 0,0])
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flasher.gpio_put(tp1_pins['ss'], True)
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print('flash ID while awake:', ' '.join(['{:02x}'.format(b) for b in data]))
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assert(data == bytes([0xff, 0xef, 0x40]))
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# put the flash to sleep
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flasher.gpio_put(tp1_pins['ss'], False)
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flasher.spi_bitbang(sck_pin=tp1_pins['sck'], mosi_pin=tp1_pins['miso'], miso_pin=tp1_pins['mosi'], buf=[0xb9])
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flasher.gpio_put(tp1_pins['ss'], True)
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# Confirm flash is asleep
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flasher.gpio_put(tp1_pins['ss'], False)
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data = flasher.spi_bitbang(sck_pin=tp1_pins['sck'], mosi_pin=tp1_pins['miso'], miso_pin=tp1_pins['mosi'], buf=[0x9f, 0,0])
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flasher.gpio_put(tp1_pins['ss'], True)
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print('flash ID while asleep:', ' '.join(['{:02x}'.format(b) for b in data]))
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assert(data == bytes([0xff, 0xff, 0xff]))
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if args.sleep_flash:
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sleep_flash()
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# Configure pins for talking to ice40
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flasher.gpio_set_direction(tp1_pins['ss'], True)
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@ -617,17 +625,6 @@ if __name__ == "__main__":
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# # Turn on ICE40 in CRAM boot mode
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# init()
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# nvcm_enable()
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# nvcm_info()
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# release power down: 0xAB
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# sleep: 0xB9
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## Request the JEDEC ID from the SPI device
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#jedec_id = dev.exchange([0x9f], 3)
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enable(1, 0) # enable and reset high
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sleep(0.2)
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enable(1, 1) # enable low, reset high
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