added firmware flasher script

Author: dekuNukem

user_program/flash_fw.py

@@ -0,0 +1,79 @@
+import os
+import sys
+import time
+import spidev
+import RPi.GPIO as GPIO
+
+PBOARD_RESET_PIN = 25
+PBOARD_BOOT0_PIN = 12
+SLAVE_REQ_PIN = 16
+GPIO.setmode(GPIO.BCM)
+GPIO.setup(PBOARD_RESET_PIN, GPIO.IN)
+GPIO.setup(PBOARD_BOOT0_PIN, GPIO.IN)
+GPIO.setup(SLAVE_REQ_PIN, GPIO.IN, pull_up_down=GPIO.PUD_DOWN)
+
+def enter_dfu():
+    # RESET LOW: Enter reset
+    GPIO.setup(PBOARD_RESET_PIN, GPIO.OUT)
+    GPIO.output(PBOARD_RESET_PIN, GPIO.LOW)
+    time.sleep(0.05)
+    # BOOT0 HIGH: Boot into DFU mode
+    GPIO.setup(PBOARD_BOOT0_PIN, GPIO.OUT)
+    GPIO.output(PBOARD_BOOT0_PIN, GPIO.HIGH)
+    time.sleep(0.05)
+    # Release RESET, BOOT0 still HIGH, STM32 now in DFU mode
+    GPIO.setup(PBOARD_RESET_PIN, GPIO.IN)
+    time.sleep(1)
+
+def exit_dfu():
+    # Release BOOT0
+    GPIO.setup(PBOARD_BOOT0_PIN, GPIO.IN)
+    # Activate RESET
+    GPIO.setup(PBOARD_RESET_PIN, GPIO.OUT)
+    GPIO.output(PBOARD_RESET_PIN, GPIO.LOW)
+    time.sleep(0.05)
+    # Release RESET, BOOT0 is LOW, STM32 boots in normal mode
+    GPIO.setup(PBOARD_RESET_PIN, GPIO.IN)
+    time.sleep(0.2)
+
+def flash_firmware(fw_path):
+    print(f"----------------- Flashing: {fw_path.split('/')[-1]} -----------------")
+    enter_dfu()
+    exit_code = os.system(f'sudo stm32flash -w {fw_path} -a 0x3b /dev/i2c-1') >> 8
+    exit_dfu()
+    if exit_code != 0:
+        for x in range(5):
+            print("!!!!!!!!!!!!!!!!! TEST FLASH FAILED !!!!!!!!!!!!!!!!!")
+        exit()
+
+if(len(sys.argv) < 2):
+    print(sys.argv[0] + ' hex_file')
+    exit()
+
+os.system("clear")
+
+pcard_spi = spidev.SpiDev(0, 0)
+pcard_spi.max_speed_hz = 2000000
+
+payload_fw_path = sys.argv[1]
+
+flash_firmware(payload_fw_path)
+
+SPI_MOSI_MAGIC = 0xde
+SPI_MOSI_MSG_TYPE_INFO_REQUEST = 1
+
+nop_spi_msg_template = [SPI_MOSI_MAGIC] + [0]*31
+info_request_spi_msg_template = [SPI_MOSI_MAGIC, 0, SPI_MOSI_MSG_TYPE_INFO_REQUEST] + [0]*29
+
+this_msg = list(info_request_spi_msg_template)
+pcard_spi.xfer(this_msg)
+time.sleep(0.1)
+response = pcard_spi.xfer(list(nop_spi_msg_template))
+time.sleep(0.1)
+print(response)
+
+if response[0] != 205:
+    for x in range(5):
+        print("!!!!!!!!!!!!!!!!! WRONG RESPONSE !!!!!!!!!!!!!!!!!")
+else:
+    print("----------------- TEST OK! -----------------")