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@ -36,7 +36,53 @@ |
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#include "stm32f1xx_it.h" |
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/* USER CODE BEGIN 0 */ |
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#include "utils/debug.h" |
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/**
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* Hard Fault diagnosis function (for use with debugger) |
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* |
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* Source: |
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* http://www.freertos.org/Debugging-Hard-Faults-On-Cortex-M-Microcontrollers.html
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*/ |
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static void __attribute__((noreturn)) __attribute__((used)) |
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prvGetRegistersFromStack(uint32_t *pulFaultStackAddress) |
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{ |
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/* These are volatile to try and prevent the compiler/linker optimising them
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away as the variables never actually get used. If the debugger won't show the |
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values of the variables, make them global my moving their declaration outside |
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of this function. */ |
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volatile __attribute__((unused)) uint32_t r0; |
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volatile __attribute__((unused)) uint32_t r1; |
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volatile __attribute__((unused)) uint32_t r2; |
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volatile __attribute__((unused)) uint32_t r3; |
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volatile __attribute__((unused)) uint32_t r12; |
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volatile __attribute__((unused)) uint32_t lr; /* Link register. */ |
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volatile __attribute__((unused)) uint32_t pc; /* Program counter. */ |
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volatile __attribute__((unused)) uint32_t psr;/* Program status register. */ |
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r0 = pulFaultStackAddress[ 0 ]; |
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r1 = pulFaultStackAddress[ 1 ]; |
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r2 = pulFaultStackAddress[ 2 ]; |
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r3 = pulFaultStackAddress[ 3 ]; |
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r12 = pulFaultStackAddress[ 4 ]; |
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lr = pulFaultStackAddress[ 5 ]; |
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pc = pulFaultStackAddress[ 6 ]; |
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psr = pulFaultStackAddress[ 7 ]; |
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error("Hard fault."); |
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dbg("r0 = 0x%08"PRIu32, r0); |
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dbg("r1 = 0x%08"PRIu32, r1); |
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dbg("r2 = 0x%08"PRIu32, r2); |
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dbg("r3 = 0x%08"PRIu32, r3); |
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dbg("r12 = 0x%08"PRIu32, r12); |
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dbg("LR = 0x%08"PRIu32, lr); |
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dbg("PC = 0x%08"PRIu32, pc); |
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dbg("PSR = 0x%08"PRIu32, psr); |
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/* When the following line is hit, the variables contain the register values. */ |
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for (;;); |
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} |
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/* USER CODE END 0 */ |
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/* External variables --------------------------------------------------------*/ |
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@ -65,6 +111,20 @@ void HardFault_Handler(void) |
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{ |
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/* USER CODE BEGIN HardFault_IRQn 0 */ |
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// Branch to HF reporting routine
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__asm volatile ( |
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" tst lr, #4 \n" |
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" ite eq \n" |
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" mrseq r0, msp \n" |
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" mrsne r0, psp \n" |
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" ldr r1, [r0, #24] \n" |
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" ldr r2, =prvGetRegistersFromStack \n" |
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" bx r2 \n" |
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); |
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// NOTE: Dead code follows
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/* USER CODE END HardFault_IRQn 0 */ |
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while (1) |
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{ |
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@ -80,7 +140,7 @@ void HardFault_Handler(void) |
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void MemManage_Handler(void) |
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{ |
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/* USER CODE BEGIN MemoryManagement_IRQn 0 */ |
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error("Memory management fault."); |
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/* USER CODE END MemoryManagement_IRQn 0 */ |
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while (1) |
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{ |
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@ -96,7 +156,7 @@ void MemManage_Handler(void) |
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void BusFault_Handler(void) |
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{ |
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/* USER CODE BEGIN BusFault_IRQn 0 */ |
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error("Prefetch fault."); |
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/* USER CODE END BusFault_IRQn 0 */ |
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while (1) |
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{ |
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@ -112,7 +172,7 @@ void BusFault_Handler(void) |
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void UsageFault_Handler(void) |
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{ |
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/* USER CODE BEGIN UsageFault_IRQn 0 */ |
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error("Usage fault."); |
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/* USER CODE END UsageFault_IRQn 0 */ |
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while (1) |
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{ |
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