import sys, os import time import array import math import argparse import usb.core import usb.util #======= Some C-like static constants ======= DFU_ID_VENDOR = 0x4348 DFU_ID_PRODUCT = 0x55e0 EP_OUT_ADDR = 0x02 EP_IN_ADDR = 0x82 USB_MAX_TIMEOUT = 2000 DETECT_CHIP_CMD_V2 = [0xa1, 0x12, 0x00, 0x52, 0x11, 0x4d, 0x43, 0x55, 0x20, 0x49, 0x53, 0x50, 0x20, 0x26, 0x20, 0x57, 0x43, 0x48, 0x2e, 0x43, 0x4e] END_FLASH_CMD_V2 = [0xa2, 0x01, 0x00, 0x00] RESET_RUN_CMD_V2 = [0xa2, 0x01, 0x00, 0x01] SEND_KEY_CMD_V20 = [0xa3, 0x30, 0x00] SEND_KEY_CMD_V23 = [0xa3, 0x38, 0x00] + [0x00] * (0x38) ERASE_CHIP_CMD_V2 = [0xa4, 0x01, 0x00, 0x08] WRITE_CMD_V2 = [0xa5, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00] VERIFY_CMD_V2 = [0xa6, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00] READ_CFG_CMD_V2 = [0xa7, 0x02, 0x00, 0x1f, 0x00] CH55X_IC_REF = {} CH55X_IC_REF[0x51] = {'device_name': 'CH551', 'device_flash_size': 10240, 'device_dataflash_size': 128, 'chip_id': 0x51} CH55X_IC_REF[0x52] = {'device_name': 'CH552', 'device_flash_size': 16384, 'device_dataflash_size': 128, 'chip_id': 0x52} CH55X_IC_REF[0x53] = {'device_name': 'CH553', 'device_flash_size': 10240, 'device_dataflash_size': 128, 'chip_id': 0x53} CH55X_IC_REF[0x54] = {'device_name': 'CH554', 'device_flash_size': 14336, 'device_dataflash_size': 128, 'chip_id': 0x54} CH55X_IC_REF[0x59] = {'device_name': 'CH559', 'device_flash_size': 61440, 'device_dataflash_size': 128, 'chip_id': 0x59} #============================================= def __get_dfu_device(idVendor=DFU_ID_VENDOR, idProduct=DFU_ID_PRODUCT): dev = usb.core.find(idVendor=idVendor, idProduct=idProduct) if dev is None: return (None, 'NO_DEV_FOUND') try: if dev.is_kernel_driver_active(0): try: dev.detach_kernel_driver(0) except usb.core.USBError: return (None, 'USB_ERROR_CANNOT_DETACH_KERNEL_DRIVER') except: pass #Windows dont need detach try: dev.set_configuration() except usb.core.USBError: return (None, 'USB_ERROR_CANNOT_SET_CONFIG') try: usb.util.claim_interface(dev, 0) except usb.core.USBError: return (None, 'USB_ERROR_CANNOT_CLAIM_INTERFACE') return (dev, '') def __detect_ch55x_v2(dev): dev.write(EP_OUT_ADDR, DETECT_CHIP_CMD_V2) ret = dev.read(EP_IN_ADDR, 6, USB_MAX_TIMEOUT) try: return CH55X_IC_REF[ret[4]] except KeyError: return None def __read_cfg_ch55x_v2(dev): dev.write(EP_OUT_ADDR, READ_CFG_CMD_V2) ret = dev.read(EP_IN_ADDR, 30, USB_MAX_TIMEOUT) ver_str = 'V%d.%d%d' % (ret[19], ret[20], ret[21]) chk_sum = (ret[22] + ret[23] + ret[24] + ret[25]) % 256 return (ver_str, chk_sum) def __write_key_ch55x_v20(dev, chk_sum): SEND_KEY_CMD_V20 = SEND_KEY_CMD_V20 + [chk_sum] * 0x30 dev.write(EP_OUT_ADDR, SEND_KEY_CMD_V20) ret = dev.read(EP_IN_ADDR, 6, USB_MAX_TIMEOUT) if ret[3] == 0: return True else: return None def __write_key_ch55x_v23(dev): dev.write(EP_OUT_ADDR, SEND_KEY_CMD_V23) ret = dev.read(EP_IN_ADDR, 6, USB_MAX_TIMEOUT) if ret[3] == 0: return True else: return None def __erase_chip_ch55x_v2(dev): dev.write(EP_OUT_ADDR, ERASE_CHIP_CMD_V2) ret = dev.read(EP_IN_ADDR, 6, USB_MAX_TIMEOUT) if ret[3] == 0: return True else: return None def __write_flash_ch55x_v20(dev, chk_sum, chip_id, payload): payload = payload + [0] * ((math.ceil(len(payload) / 56) * 56) - len(payload)) # Payload needs to be padded, 56 is a good number file_length = len(payload) for index in range(file_length): if index % 8 == 7: payload[index] = (payload[index] ^ ((chk_sum + chip_id) % 256)) % 256 left_len = file_length curr_addr = 0 while curr_addr < file_length: if left_len >= 56: pkt_length = 56 else: pkt_length = left_len __WRITE_CMD_V2 = WRITE_CMD_V2 __WRITE_CMD_V2[1] = pkt_length + 5 __WRITE_CMD_V2[3] = curr_addr % 256 __WRITE_CMD_V2[4] = (curr_addr >> 8) % 256 __WRITE_CMD_V2[7] = left_len % 256 __WRITE_CMD_V2 = __WRITE_CMD_V2 + payload[curr_addr:curr_addr+pkt_length] dev.write(EP_OUT_ADDR, __WRITE_CMD_V2) ret = dev.read(EP_IN_ADDR, 6, USB_MAX_TIMEOUT) curr_addr = curr_addr + pkt_length left_len = left_len - pkt_length if ret[4] != 0x00: return None return file_length def __write_flash_ch55x_v23(dev, chk_sum, chip_id, payload): payload = payload + [0] * ((math.ceil(len(payload) / 56) * 56) - len(payload)) # Payload needs to be padded, 56 is a good number file_length = len(payload) for index in range(file_length): if index % 8 == 7: payload[index] = (payload[index] ^ ((chk_sum + chip_id) % 256)) % 256 else: payload[index] = (payload[index] ^ chk_sum) % 256 left_len = file_length curr_addr = 0 while curr_addr < file_length: if left_len >= 56: pkt_length = 56 else: pkt_length = left_len __WRITE_CMD_V2 = WRITE_CMD_V2 __WRITE_CMD_V2[1] = pkt_length + 5 __WRITE_CMD_V2[3] = curr_addr % 256 __WRITE_CMD_V2[4] = (curr_addr >> 8) % 256 __WRITE_CMD_V2[7] = left_len % 256 __WRITE_CMD_V2 = __WRITE_CMD_V2 + payload[curr_addr:curr_addr+pkt_length] dev.write(EP_OUT_ADDR, __WRITE_CMD_V2) ret = dev.read(EP_IN_ADDR, 6, USB_MAX_TIMEOUT) curr_addr = curr_addr + pkt_length left_len = left_len - pkt_length if ret[4] != 0x00: return None return file_length def __verify_flash_ch55x_v20(dev, chk_sum, chip_id, payload): payload = payload + [0] * ((math.ceil(len(payload) / 56) * 56) - len(payload)) # Payload needs to be padded, 56 is a good number file_length = len(payload) for index in range(file_length): if index % 8 == 7: payload[index] = (payload[index] ^ ((chk_sum + chip_id) % 256)) % 256 left_len = file_length curr_addr = 0 while curr_addr < file_length: if left_len >= 56: pkt_length = 56 else: pkt_length = left_len __VERIFY_CMD_V2 = VERIFY_CMD_V2 __VERIFY_CMD_V2[1] = pkt_length + 5 __VERIFY_CMD_V2[3] = curr_addr % 256 __VERIFY_CMD_V2[4] = (curr_addr >> 8) % 256 __VERIFY_CMD_V2[7] = left_len % 256 __VERIFY_CMD_V2 = __VERIFY_CMD_V2 + payload[curr_addr:curr_addr+pkt_length] dev.write(EP_OUT_ADDR, __VERIFY_CMD_V2) ret = dev.read(EP_IN_ADDR, 6, USB_MAX_TIMEOUT) curr_addr = curr_addr + pkt_length left_len = left_len - pkt_length if ret[4] != 0x00: return None return file_length def __verify_flash_ch55x_v23(dev, chk_sum, chip_id, payload): payload = payload + [0] * ((math.ceil(len(payload) / 56) * 56) - len(payload)) # Payload needs to be padded, 56 is a good number file_length = len(payload) for index in range(file_length): if index % 8 == 7: payload[index] = (payload[index] ^ ((chk_sum + chip_id) % 256)) % 256 else: payload[index] = (payload[index] ^ chk_sum) % 256 left_len = file_length curr_addr = 0 while curr_addr < file_length: if left_len >= 56: pkt_length = 56 else: pkt_length = left_len __VERIFY_CMD_V2 = VERIFY_CMD_V2 __VERIFY_CMD_V2[1] = pkt_length + 5 __VERIFY_CMD_V2[3] = curr_addr % 256 __VERIFY_CMD_V2[4] = (curr_addr >> 8) % 256 __VERIFY_CMD_V2[7] = left_len % 256 __VERIFY_CMD_V2 = __VERIFY_CMD_V2 + payload[curr_addr:curr_addr+pkt_length] dev.write(EP_OUT_ADDR, __VERIFY_CMD_V2) ret = dev.read(EP_IN_ADDR, 6, USB_MAX_TIMEOUT) curr_addr = curr_addr + pkt_length left_len = left_len - pkt_length if ret[4] != 0x00: return None return file_length def __end_flash_ch55x_v2(dev): dev.write(EP_OUT_ADDR, END_FLASH_CMD_V2) ret = dev.read(EP_IN_ADDR, 6, USB_MAX_TIMEOUT) if ret[4] != 0x00: return None else: return True def __restart_run_ch55x_v2(dev): dev.write(EP_OUT_ADDR, RESET_RUN_CMD_V2) def __main(): parser = argparse.ArgumentParser(description="USBISP Tool For WinChipHead CH55x.") parser.add_argument('-f', '--file', type=str, default='', help="The target file to be flashed.") parser.add_argument('-r', '--reset_after_flash', action='store_true', default=False, help="Reset after finsh flash.") args = parser.parse_args() ret = __get_dfu_device() if ret[0] is None: sys.exit(ret[1]) dev = ret[0] ret = __detect_ch55x_v2(dev) if ret is None: print('Unable to detect CH55x.') print('Found %s.' % ret['device_name']) chip_id = ret['chip_id'] ret = __read_cfg_ch55x_v2(dev) chk_sum = ret[1] print('BTVER: %s.' % ret[0]) if args.file != '': payload = list(open(args.file, 'rb').read()) if ret[0] == 'V2.30': ret = __write_key_ch55x_v20(dev, chk_sum) if ret is None: sys.exit('Failed to write key to CH55x.') ret = __erase_chip_ch55x_v2(dev) if ret is None: sys.exit('Failed to erase CH55x.') ret = __write_flash_ch55x_v20(dev, chk_sum, chip_id, payload) if ret is None: sys.exit('Failed to flash firmware of CH55x.') ret = __verify_flash_ch55x_v20(dev, chk_sum, chip_id, payload) if ret is None: sys.exit('Failed to verify firmware of CH55x.') else: if ret[0] == 'V2.31': ret = __write_key_ch55x_v23(dev) if ret is None: sys.exit('Failed to write key to CH55x.') ret = __erase_chip_ch55x_v2(dev) if ret is None: sys.exit('Failed to erase CH55x.') ret = __write_flash_ch55x_v23(dev, chk_sum, chip_id, payload) if ret is None: sys.exit('Failed to flash firmware of CH55x.') ret = __verify_flash_ch55x_v23(dev, chk_sum, chip_id, payload) if ret is None: sys.exit('Failed to verify firmware of CH55x.') else: sys.exit('Bootloader version not supported.') ret = __end_flash_ch55x_v2(dev) if ret is None: sys.exit('Failed to end flash process.') print('Flash done.') if args.reset_after_flash: __restart_run_ch55x_v2(dev) print('Restart and run.') if __name__ == '__main__': __main()