dfu_init.h

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// https://community.st.com/s/question/0D50X00009bNBluSAG/boot-stm32h7-after-power-up
// https://community.st.com/s/article/STM32H7-bootloader-jump-from-application
 
#ifndef HW_LAYER_PORTS_STM32_STM32F7_DFU_INIT_H_
#define HW_LAYER_PORTS_STM32_STM32F7_DFU_INIT_H_
 
// System control block registers base
LDR R1, =0xE000ED00
 
// location of system memory (DFU bootloader)
LDR R0, =0x1FF09800
 
// Set the vector table offset to the sysmem image
STR R0, [R1, #8]
 
// load the stack pointer
LDR SP, [R0, #0]
 
// prepare for jump to bootloader
LDR R0, [R0, #4]
 
#endif /* HW_LAYER_PORTS_STM32_STM32F7_DFU_INIT_H_ */