void backtrace(int pcAddr, int spAddr, unsigned *line)
{
UnwResult r;
lcd_putsf(0, (*line)++, "pc:%08x sp:%08x", pcAddr, spAddr);
lcd_update();
r = UnwindStart(pcAddr, spAddr, &cliCallbacks, (void *)line);
lcd_puts(0, (*line)++, "bt end");
lcd_update();
}
void HardFault_HandlerC(unsigned long *sp, unsigned long lr, unsigned long cause) {
static const char* causestr[] = {
"NMI","Hard","Mem","Bus","Usage","Debug","WDT","RSTC"
};
UnwindFrame btf;
// Dump report to the Programming port (interrupts are DISABLED)
TXBegin();
TX("\n\n## Software Fault detected ##\n");
TX("Cause: "); TX(causestr[cause]); TX('\n');
TX("R0 : "); TXHex(((unsigned long)sp[0])); TX('\n');
TX("R1 : "); TXHex(((unsigned long)sp[1])); TX('\n');
TX("R2 : "); TXHex(((unsigned long)sp[2])); TX('\n');
TX("R3 : "); TXHex(((unsigned long)sp[3])); TX('\n');
TX("R12 : "); TXHex(((unsigned long)sp[4])); TX('\n');
TX("LR : "); TXHex(((unsigned long)sp[5])); TX('\n');
TX("PC : "); TXHex(((unsigned long)sp[6])); TX('\n');
TX("PSR : "); TXHex(((unsigned long)sp[7])); TX('\n');
// Configurable Fault Status Register
// Consists of MMSR, BFSR and UFSR
TX("CFSR : "); TXHex((*((volatile unsigned long *)(0xE000ED28)))); TX('\n');
// Hard Fault Status Register
TX("HFSR : "); TXHex((*((volatile unsigned long *)(0xE000ED2C)))); TX('\n');
// Debug Fault Status Register
TX("DFSR : "); TXHex((*((volatile unsigned long *)(0xE000ED30)))); TX('\n');
// Auxiliary Fault Status Register
TX("AFSR : "); TXHex((*((volatile unsigned long *)(0xE000ED3C)))); TX('\n');
// Read the Fault Address Registers. These may not contain valid values.
// Check BFARVALID/MMARVALID to see if they are valid values
// MemManage Fault Address Register
TX("MMAR : "); TXHex((*((volatile unsigned long *)(0xE000ED34)))); TX('\n');
// Bus Fault Address Register
TX("BFAR : "); TXHex((*((volatile unsigned long *)(0xE000ED38)))); TX('\n');
TX("ExcLR: "); TXHex(lr); TX('\n');
TX("ExcSP: "); TXHex((unsigned long)sp); TX('\n');
btf.sp = ((unsigned long)sp) + 8*4; // The original stack pointer
btf.fp = btf.sp;
btf.lr = ((unsigned long)sp[5]);
btf.pc = ((unsigned long)sp[6]) | 1; // Force Thumb, as CORTEX only support it
// Perform a backtrace
TX("\nBacktrace:\n\n");
int ctr = 0;
UnwindStart(&btf, &UnwCallbacks, &ctr);
// Disable all NVIC interrupts
NVIC->ICER[0] = 0xFFFFFFFF;
NVIC->ICER[1] = 0xFFFFFFFF;
// Relocate VTOR table to default position
SCB->VTOR = 0;
// Disable USB
otg_disable();
// Restart watchdog
WDT_Restart(WDT);
// Reset controller
NVIC_SystemReset();
while(1) { WDT_Restart(WDT); }
}