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AN3154 Datasheet(PDF) 18 Page - STMicroelectronics |
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AN3154 Datasheet(HTML) 18 Page - STMicroelectronics |
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18 / 34 page  Bootloader command set AN3154 18/34 DocID017063 Rev 5 Figure 13. Read memory command: device side The STM32 sends messages as follows: ACK message: Std ID = 0x11, DLC = 1, data[0] = ACK if content of the command is correct else data[0] = NACK Data message (N+1) / 8: Std ID = 0x11, DLC = Number of Byte, data[0] = 0xXX... data[Number of Byte - 1] = 0xYY ACK message: Std ID = 0x11, DLC = 1, data[0] = ACK 3.6 Go command The Go command is used to execute the downloaded code or any other code by branching to an address specified by the application. When the bootloader receives the Go command, it starts if the message contains the following valid information: • ID of the command is correct or not • ReadOutProtection is disabled or enabled • Branch destination address is valid or not(data[0] is the address MSB and data[3] 4 is LSB If the message content is correct it transmits an ACK message otherwise it transmits a NACK message. |
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