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AN3154

Bootloader code sequence

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Bootloader code sequence

Figure 1. Bootloader for STM32 with CAN

1. it is recommended to send a frame with a Standard ID = 0x79.

Once the system memory boot mode is entered and the STM32 device has been configured

(for more details refer to application note AN2606 “STM32 system memory boot mode”), the

bootloader code waits for a frame on the CANx_Rx pin. When a detection occurs the CAN

bootloader firmware starts to check the external clock frequency.

Figure 2 shows the flowchart of the frequency check.