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Add hard fault handler for STM32 that dumps register contents to aid in

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debugging.

Might be nice to have a generalized form of something like this to help in
pointing in the right direction when one doesn't have a JTAG debugger.
This commit is contained in:
James Snyder 2009-11-07 00:24:02 +00:00
parent 4d724fd5f9
commit a66a9fed6d
2 changed files with 55 additions and 8 deletions
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1
SConstruct
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@ -278,6 +278,7 @@ module_files = " " + " ".join( [ "src/modules/%s" % name for name in module_name
#opt = "-O3"
opt = "-Os -fomit-frame-pointer"
#opt += " -ffreestanding"
#opt += " -fconserve-stack" # conserve stack at potential speed cost, >=GCC4.4
# Toolset data (filled by each platform in part)

62
src/platform/stm32/stm32f10x_it.c
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@ -23,6 +23,8 @@
/* Includes ------------------------------------------------------------------*/
#include "stm32f10x_it.h"
#include "systick.h"
#include <stdio.h>
#include "platform.h"
/** @addtogroup Template_Project
* @{
*/
@ -47,6 +49,51 @@ void NMI_Handler(void)
{
}
int fputc(int ch, FILE *f)
{
platform_uart_send(0, ch);
return ch;
}
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 ("[Hard fault handler]\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 = %x\n", stacked_lr);
printf ("PC = %x\n", stacked_pc);
printf ("PSR = %x\n", stacked_psr);
printf ("BFAR = %x\n", (*((volatile unsigned *)(0xE000ED38))));
printf ("CFSR = %x\n", (*((volatile unsigned *)(0xE000ED28))));
printf ("HFSR = %x\n", (*((volatile unsigned *)(0xE000ED2C))));
printf ("DFSR = %x\n", (*((volatile unsigned *)(0xE000ED30))));
printf ("AFSR = %x\n", (*((volatile unsigned *)(0xE000ED3C))));
while (1) { ;; }
}
/**
* @brief This function handles Hard Fault exception.
* @param None
@ -54,14 +101,13 @@ void NMI_Handler(void)
*/
void HardFault_Handler(void)
{
/* Go to infinite loop when Hard Fault exception occurs */
while (1)
{
platform_uart_send(0, ' ');
platform_uart_send(0, 'H');
platform_uart_send(0, 'F');
platform_uart_send(0, '!');
}
asm(
"tst lr, #4\n\t"
"ite eq\n\t"
"mrseq r0, msp\n\t"
"mrsne r0, psp\n\t"
"b hard_fault_handler_c"
);
}
/**