int bcm2835_i2c_init(void)
{
struct bcm2835_i2c_ctrl *bcm2835_i2c = bcm2835_i2c_get_ctrl();
RegisterInterrupt(BCM2835_IRQ_ID_I2C, bcm2835_i2c_isr, bcm2835_i2c);
bcm2835_i2c_debug_print_status();
return 0;
}
/*
* Setup the timer 0 to generate the tick interrupts at the required frequency.
*/
static void prvSetupTimerInterrupt( void )
{
uint32_t ulCompareMatch;
/* Calculate the match value required for our wanted tick rate. */
ulCompareMatch = 1000000 / configTICK_RATE_HZ;
/* Protect against divide by zero. Using an if() statement still results
in a warning - hence the #if. */
#if portPRESCALE_VALUE != 0
{
ulCompareMatch /= ( portPRESCALE_VALUE + 1 );
}
#endif
DisableInterrupts();
pRegs->CTL = 0x003E0000;
pRegs->LOD = ulCompareMatch;
pRegs->RLD = ulCompareMatch;
pRegs->DIV = portTIMER_PRESCALE;
pRegs->CLI = 0;
pRegs->CTL = 0x003E00A2;
RegisterInterrupt(64, vTickISR, NULL);
EnableInterrupt(64);
EnableInterrupts();
}
