Question
DFUSE Demo bricks STM32L476
Posted on October 21, 2016 at 21:00
We had success updating our device with the DFUSE demo which uses a STM32F4 device. We now have a product with a STM32L476 device, but when I try to update it via DFUSE demo, it bricks it.
To get the device in DFU mode, I do the following instructions immediately after a reset. This is similar to the STM32F4 code, but modified for the STM32L476, which has same registers but different address and bitmapping.asm(
''LDR R0, =0x40021060\n\t'' /* RCC_APB2ENR */
''LDR R1, =0x00000001\n\t'' /* ENABLE SYSCFG CLOCK */
''STR R1, [R0, #0]\n\t''
''LDR R0, =0x40010000\n\t'' /* SYSCFG_MEMRMP */
''LDR R1, =0x00000001\n\t'' /* MAP ROM AT ZERO */
''STR R1, [R0, #0]\n\t''
''LDR R0, =0x1FFF0000\n\t'' /* ROM BASE */
''LDR SP,[R0, #0]\n\t'' /* SP @ +0 */
''LDR R0,[R0, #4]\n\t'' /* PC @ +4 */
''BX R0''
);