STM32 chip firmware update using NodeJs

stm32 firmupdate step

1. BOOT0 to 1
2. RESET to 1
3. RESET to 0

boot mode enter

1. TX 0x7F
2. RX 0x79

flash erase

1. TX 0x43
2. TX 0xBC
3. RX 0x79 // erasing flash
4. TX 0xFF
5. TX 0x00
6. RX 0x79 // flash Erase success

---------------- loop start ---------------

1. TX 0x31
2. TX 0xCE
3. RX 0x79

send address starting 0x08000000

0x12345678
|31-----------24|23-----------16|15------------8|7---------bit 0|
+---------------+---------------+---------------+---------------+
|0 0 0 1 0 0 1 0|0 0 1 1 0 1 0 0|0 1 0 1 0 1 1 0|0 1 1 1 1 0 0 0|
+---------------+---------------+---------------+---------------+

4. TX -
   1byte - 0 0 0 1 0 0 1 0
   2byte - 0 0 1 1 0 1 0 0
   3byte - 0 1 0 1 0 1 1 0
   4byte - 0 1 1 1 1 0 0 0
   5byte - XOR (|0 0 0 1 0 0 1 0|0 0 1 1 0 1 0 0|0 1 0 1 0 1 1 0|0 1 1 1 1 0 0 0|)
   

5. RX 0x79 // address send
   

6. TX number of bytes --- (128 -1)
   

7. Tx 128 byte send
   

checksunm TX -- XOR(send byte)

8. RX 0x79 // packet send done .........................
   

------------ loop end ------------------------

boot mode exit

1. BOOT0 to 0
2. RESET to 1
3. RESET to 0

Referecnce

1. https://nodejs.org/docs/latest-v12.x/api/
2. https://medium.com/hackernoon/arduino-serial-data-796c4f7d27ce
3. https://serialport.io/docs/next/api-serialport
4. https://theiotlearninginitiative.gitbook.io/embedded-linux/subsystems/general-purpose-input-output
5. http://doc.industio.com/docs/ssd20x_manual/ssd20x_manual-1cradq5hh4qn2
6. https://github.com/florisla/stm32loader/tree/master