Dear community,
I have been fighting against the Bootloader for a time now.
I manage to initiate it, using GET commands and the read unprotect command. But when it comes to reading or writing, I just get a timeout, no NACK or anything.
I don't know what is wrong with my code, and I cannot find an example of working c code. I already checked the application notes.
The setup is the following:
- Board1 L476RG in Bootloader mode (Patter 7)
- Board 2 L4P5ZG running the program in c to enter into the Board1 memory.
I connected Tx-Rx and Rx-Tx plus the GND.
Uart configuration:
huart1.Instance = USART1;
huart1.Init.BaudRate = 9600;
huart1.Init.WordLength = UART_WORDLENGTH_9B;
huart1.Init.StopBits = UART_STOPBITS_1;
huart1.Init.Parity = UART_PARITY_EVEN;
This is the output of the terminal:
Sending..
ACK... Ready
Response: 0x79
Response: 0x79
Sending command ...
ACK
Response: 0x79
Response: 0x0B
Response: 0x31
Response: 0x00
Response: 0x01
Response: 0x02
Response: 0x11
Response: 0x21
Response: 0x31
Response: 0x44
Response: 0x63
Response: 0x73
Response: 0x82
Response: 0x92
Response: 0x79
Get version - status: 1
ACK
Response: 0x79
Response: 0x79
Read unprotect 1
UART Receive Status: 3
Response: 0x00
Response: 0x00
I attach the code, it is divided into a boot_util class with the functions and the main code that is activated by a button.
I would be grateful if someone could help me because I have been stuck now with this issue for many weeks and I cannot understand the error.
Thank you!
