// Handle an exception/interrupt.
// Arguments:
// - cause: exception cause, see potato.h for values
// - epc: exception return address
// - regbase: base of the stored context, can be used for printing all
// registers with regbase[0] = x1 and upwards.
void exception_handler(uint32_t cause, void * epc, void * regbase)
{
if(cause == ((1 << CAUSE_INTERRUPT_BIT) | (CAUSE_IRQ_BASE + 5))) // Timer interrupt
{
uart_puts(IO_ADDRESS(UART_BASE), "Hashes per second: ");
uart_puth(IO_ADDRESS(UART_BASE), hashes_per_second);
uart_puts(IO_ADDRESS(UART_BASE), "\n\r");
seg7_set_value(IO_ADDRESS(SEG7_BASE), hashes_per_second);
if(led_status == 0)
{
gpio_set_output(IO_ADDRESS(GPIO2_BASE), 1);
led_status = 1;
} else {
gpio_set_output(IO_ADDRESS(GPIO2_BASE), 0);
led_status = 0;
}
hashes_per_second = 0;
timer_reset(IO_ADDRESS(TIMER_BASE));
} else {
uart_puts(IO_ADDRESS(UART_BASE), "Unhandled exception!\n\r");
uart_puts(IO_ADDRESS(UART_BASE), "Cause: ");
uart_puth(IO_ADDRESS(UART_BASE), cause);
uart_puts(IO_ADDRESS(UART_BASE), "\n\r");
uart_puts(IO_ADDRESS(UART_BASE), "EPC: ");
uart_puth(IO_ADDRESS(UART_BASE), (uint32_t) epc);
uart_puts(IO_ADDRESS(UART_BASE), "\n\r");
while(1) asm volatile("nop\n");
}
}
int main(void){
uart_init();
uart_puts_P(PSTR("\nETHERNET TEST > PROGRAM STARTED\n"));
uart_puts_P(PSTR("UART initiated\n"));
startSPI();
uint16_t v = socketNumberToAddress(2);
uint8_t a[] = {v<<8, v|0xFF};
uart_puth(a , 2);
uart_puts_P(PSTR("\n\n"));
uart_putn(pgm_read_byte(var) & 0xFF);
halt();
return 0;
}