micropythonでshrike-lite その31

概要

micropythonでshrike-lite、やってみた。
spi見つけたので、pythonから叩いてみた。

参考にしたページ

サンプルコード

from machine import Pin, SPI
import time
import shrike

SCK = 2
CS = 1
MOSI = 3
MISO = 0
FPGA_RESET = 14
print("ok0")
shrike.reset()
shrike.flash("template.bin")
print("ok1")
reset_pin = Pin(FPGA_RESET, Pin.OUT, value = 1)
reset_pin.value(0)
time.sleep_ms(100)
reset_pin.value(1)
time.sleep_ms(100)

cs = Pin(CS, Pin.OUT, value = 1)
spi = SPI(0, baudrate = 1_000_000, polarity = 0, phase = 0, bits = 8, firstbit = SPI.MSB, sck = Pin(SCK), mosi = Pin(MOSI), miso = Pin(MISO))
print("ok2")

def spi_exchange(value):
	tx = bytes([value])
	rx = bytearray(1)
	cs.value(0)
	spi.write_readinto(tx, rx)
	cs.value(1)
	return rx[0]

patterns = [0x00, 0x12, 0x7F, 0xFF]
expected_rx = 0x00

def test():
	global expected_rx
	for value in patterns:
		received = spi_exchange(value)
		result = "PASS" if received == expected_rx else "FAIL"
		print("TX: 0x{:02X} RX: 0x{:02X} EXPECT: 0x{:02X} {}".format(value, received, expected_rx, result))
		expected_rx = (value + 1) & 0xFF
		time.sleep_ms(100)

print("ok3")

実行結果

>shrike0
Port open ok
ok0
[shrike_flash] FPGA reset done
[shrike_flash] FPGA reset  Starting FPGA flash...
[shrike_fpga] flashing: template.bin
[shrike_flash] FPGA programming done.
ok1
ok2
ok3
MicroPython v1.26.0-preview.527.g599f545a3.dirty on 2025-10-11; Vicharak Shrike FPGA with RP2040
Type "help()" for more information.
test()
>>> test()
TX: 0x00 RX: 0x00 EXPECT: 0x00 PASS
TX: 0x12 RX: 0x01 EXPECT: 0x01 PASS
TX: 0x7F RX: 0x13 EXPECT: 0x13 PASS
TX: 0xFF RX: 0x80 EXPECT: 0x80 PASS

>>>

以上。