Kinetis MicrocontrollersのトピックRe: Bus Fault

Bus Fault

PeterFromSweden — Thu, 29 Oct 2020 09:26:07 GMT

This simple program causes a bus fault?!?

int main(void){  uint32_t tmp;  tmp = PORTD_PCR14; // <-- Causes HardFault or BusFault?!?                     // SCB_HFSR = 0x40000000                     // SCB_CFSR = 0x8200   return 0;}

TWR-K60, Baremetal project.

Any Ideas what happened?

Re: Bus Fault

Dekiru — Tue, 25 Oct 2011 22:10:02 GMT

You have to enable clock to modules before you access them, otherwise fault will happen.

Example:

/* Enable clock gate to used ports */
SIM_SCGC5 |= SIM_SCGC5_PORTE_MASK | SIM_SCGC5_PORTB_MASK | SIM_SCGC5_PORTC_MASK;