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AN3154 Fiches technique(PDF) 22 Page - STMicroelectronics

No de pièce AN3154
Description  CAN protocol used in the STM32 bootloader
PDF  34 Pages
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN3154 Fiches technique(HTML) 22 Page - STMicroelectronics

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Bootloader command set
AN3154
22/34
DocID017063 Rev 5
Figure 17. Write memory command: device side
The STM32 sends messages as follows:
ACK message: Std ID = 0x31, DLC = 1, data[0] = ACK if the content of the command is
correct else data[0] = NACK
ROP inactive?
Receive the ’data messages’ and
temporarily write the data to RAM
No
Yes
Start write memory
Yes
Received message
Send ACK message
Send ACK message
End of write memory
No
Yes
Send NACK message
If a message is corrupted
Write the received data to RAM
from the start address
Write the received data to RAM
from the start address
Write the received data to RAM
from the start address
ai15719b
Address in Flash ?
Address valid?
Write the received data to the
memory from the start address
Yes
No
Address in RAM ?
Write the received data to RAM
from the start address
Write the received data to RAM
from the start address
Write the received data to RAM
from the start address
Yes
No
Address= 0x1FFF F800 ?
Write the Keys for Option byte
area access
Write the received data to Option
area access from start address
Send ACK message
Generated system reset
No
with stdID
= 0x31?



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