ST STM32F105 series - Figure 55. Download Request: Device Side

AN2662 DFU bootloader
Doc ID 14156 Rev 1 73/83
Figure 55. Download request: Device side
1. This routine can be used to reset the device to be reset or to jump to the application.
Download request
Erase
command
Set Address
No
Ye s
Decode the command
(First byte of the received buffer)
Set Address
Pointer routine
Read Unprotect
wBlockNum == 0 ?
Pointer command
Unsupported
command
Erase
routine
State = dfuERROR
Status = errSTALLEDPKT
Read Unprotect
routine
command
Write Memory
routine
No
Ye s
wBlockNum > 1?
Stall
Wait for data stage
Return Status:
dfuDNBUSY
Current status is
dfuIDLE or dfuDNLOAD-IDLE
Stall
No
Acknowledge
the request
Ye s
Receive data
buffer
Wait for Get Status
wLength > 0
Ye s
No
routine
1)
Leave DFU