/** Read NAP's IRQ register.
* NAP's IRQ register shows which channels in NAP need to be serviced. NAP IRQ
* line will stay high as long as any bit in IRQ register reads is high.
*
* \return 32 bit value from NAP's IRQ register.
*/
static u32 nap_irq_rd_blocking(void)
{
u8 temp[4] = { 0, 0, 0, 0 };
nap_xfer_blocking(NAP_REG_IRQ, 4, temp, temp);
return (temp[0] << 24) | (temp[1] << 16) | (temp[2] << 8) | temp[3];
}
int main(void)
{
init(1);
printf("\n\nFirmware info - git: " GIT_VERSION ", built: " __DATE__ " " __TIME__ "\n\r");
printf("--- NAP TEST REGS TEST ---\n\r");
u8 rdwr_in[4];
u8 rdwr_out[4] = {0, 0, 0, 0};
u32 count = 1;
u32 rdwr_bad = 0;
u32 beef_bad = 0;
/* First read should give "DECAFBAD", */
nap_xfer_blocking(254, 4, rdwr_in, rdwr_out);
if (rdwr_in[0] != 0xDE ||
rdwr_in[1] != 0xCA ||
rdwr_in[2] != 0xFB ||
rdwr_in[3] != 0xAD) {
printf("First read of rd/wr test register reads %02X%02X%02X%02X, "
"should be DECAFBAD\n",
rdwr_in[0], rdwr_in[1],
rdwr_in[2], rdwr_in[3]);
rdwr_bad++;
}
u8 i = 1;
while (1) {
rdwr_out[0] = i;
rdwr_out[1] = i;
rdwr_out[2] = i;
rdwr_out[3] = i;
nap_xfer_blocking(254, 4, rdwr_in, rdwr_out);
if (rdwr_in[0] != (u8)(i-1) ||
rdwr_in[1] != (u8)(i-1) ||
rdwr_in[2] != (u8)(i-1) ||
rdwr_in[3] != (u8)(i-1)) {
printf("\nrd/wr register reads %02X%02X%02X%02X, "
" but i = 0x%02X\n",
rdwr_in[0], rdwr_in[1],
rdwr_in[2], rdwr_in[3], (u8)(i-1));
rdwr_bad++;
}
i++;
nap_xfer_blocking(255, 4, rdwr_in, NULL);
if (rdwr_in[0] != 0xDE ||
rdwr_in[1] != 0xAD ||
rdwr_in[2] != 0xBE ||
rdwr_in[3] != 0xEF) {
printf("\nDeceased cow register reads %02X%02X%02X%02X, "
"should be DEADBEEF\n",
rdwr_in[0], rdwr_in[1],
rdwr_in[2], rdwr_in[3]);
beef_bad++;
}
led_toggle(LED_GREEN);
led_toggle(LED_RED);
count++;
if (count % 5000 == 0)
printf("%d/%d errors out of %d\n",
(unsigned int)rdwr_bad, (unsigned int)beef_bad, (unsigned int)count);
/*for (u32 i = 0; i < 60000; i++)*/
/*__asm__("nop");*/
}
while (1);
return 0;
}
