In the Vector table you’ll see something like this
.word _estack
.word Reset_Handler
.word NMI_Handler
.word HardFault_Handler
.word MemManage_Handler
.word BusFault_Handler
.word UsageFault_Handler
We need to add the C code
.word _estack
.word Reset_Handler
.word NMI_Handler
.word HardFault_Handler
.word MemManage_Handler
.word BusFault_Handler
.word UsageFault_Handler
We need to add the C code
void hard_fault_handler_c (unsigned int * hardfault_args) { unsigned int stacked_r0; unsigned int stacked_r1; unsigned int stacked_r2; unsigned int stacked_r3; unsigned int stacked_r12; unsigned int stacked_lr; unsigned int stacked_pc; unsigned int stacked_psr; stacked_r0 = ((unsigned long) hardfault_args[0]); stacked_r1 = ((unsigned long) hardfault_args[1]); stacked_r2 = ((unsigned long) hardfault_args[2]); stacked_r3 = ((unsigned long) hardfault_args[3]); stacked_r12 = ((unsigned long) hardfault_args[4]); stacked_lr = ((unsigned long) hardfault_args[5]); stacked_pc = ((unsigned long) hardfault_args[6]); stacked_psr = ((unsigned long) hardfault_args[7]); printf ("\n\n[Hard fault handler - all numbers in hex]\n"); printf ("R0 = %x\n", stacked_r0); printf ("R1 = %x\n", stacked_r1); printf ("R2 = %x\n", stacked_r2); printf ("R3 = %x\n", stacked_r3); printf ("R12 = %x\n", stacked_r12); printf ("LR [R14] = %x subroutine call return address\n", stacked_lr); printf ("PC [R15] = %x program counter\n", stacked_pc); printf ("PSR = %x\n", stacked_psr); printf ("BFAR = %x\n", (*((volatile unsigned long *)(0xE000ED38)))); printf ("CFSR = %x\n", (*((volatile unsigned long *)(0xE000ED28)))); printf ("HFSR = %x\n", (*((volatile unsigned long *)(0xE000ED2C)))); printf ("DFSR = %x\n", (*((volatile unsigned long *)(0xE000ED30)))); printf ("AFSR = %x\n", (*((volatile unsigned long *)(0xE000ED3C)))); printf ("SCB_SHCSR = %x\n", SCB->SHCSR); while (1); }
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