ST STM32F105 series - Figure 3. Get Command: Host Side; Figure 4. Get Command: Device Side

USART bootloader AN2662
16/83 Doc ID 14156 Rev 1
Figure 3. Get command: host side
Figure 4. Get command: device side
Send 0x00 + 0xFF
Start Get
Wait for ACK
or NACK
Receive the number of bytes
(version+commands)
Receive the bootloader version
Receive the supported commands
Wait for ACK
or NACK
End of Get
NACK
ACK
ai14631
NACK
ACK
Send ACK byte
Start Get
Received
byte = 0x00+0xFF?
Send the number of bytes
(version+commands)
Send the bootloader version
Send the supported commands
End of Get
No
Ye s
ai14632
Send NACK byte
Send ACK byte