/* Return main A clock rate */
uint32_t Chip_Clock_GetMain_A_ClockRate(void)
{
uint32_t clkRate = 0;
switch (Chip_Clock_GetMain_A_ClockSource()) {
case SYSCON_MAIN_A_CLKSRC_FRO12MHZ:
clkRate = SYSCON_FRO12MHZ_FREQ;
break;
case SYSCON_MAIN_A_CLKSRCA_CLKIN:
clkRate = Chip_Clock_GetExtClockInRate();
break;
case SYSCON_MAIN_A_CLKSRCA_WDTOSC:
clkRate = Chip_Clock_GetWDTOSCRate();
break;
case SYSCON_MAIN_A_CLKSRCA_FROHF:
clkRate = Chip_Clock_GetFROHFRate();
break;
default:
clkRate = 0;
break;
}
return clkRate;
}
/**
* @brief Application main function
* @return Does not return
*/
int main(void)
{
/* Board Initialization */
SystemCoreClockUpdate();
Board_Init();
/* Clock enables and checks */
if (CLKOUT_SEL == SYSCON_CLKOUTSRC_RTC) {
/* Turn on the RTC 32K Oscillator */
Chip_SYSCON_PowerUp(SYSCON_PDRUNCFG_PD_32K_OSC);
Chip_Clock_EnableRTCOsc();
}
else if (CLKOUT_SEL == SYSCON_CLKOUTSRC_WDTOSC) {
/* Enable the power to the WDT Oscillator */
Chip_SYSCON_PowerUp(SYSCON_PDRUNCFG_PD_WDT_OSC);
}
else if (CLKOUT_SEL == SYSCON_CLKOUTSRC_CLKIN) {
/* Setup CLKIN via IOCON (pin muxing) */
Chip_IOCON_PinMuxSet(LPC_IOCON, 0, 22,
(IOCON_FUNC1 | IOCON_MODE_INACT | IOCON_DIGITAL_EN));
if (Chip_Clock_GetExtClockInRate() == 0) {
/* Can't continue, stop! */
DEBUGSTR("CLKIN selected for CLKOUT, but CLKIN rate is 0\r\n");
while (1) {}
}
}
/* Map P0.21 as CLKOUT pin */
Chip_IOCON_PinMuxSet(LPC_IOCON, 0, 21,
(IOCON_FUNC1 | IOCON_MODE_INACT | IOCON_DIGITAL_EN));
/* There isn't too much to this example */
Chip_Clock_SetCLKOUTSource(CLKOUT_SEL, CLKOUT_DIV);
return 0;
}
