/* Initialize FlexCOMM to a given peripheral */
int Chip_FLEXCOMM_Init(LPC_FLEXCOMM_T *pFCOMM, FLEXCOMM_PERIPH_T periph)
{
int ret;
int idx = Chip_FLEXCOMM_GetIndex(pFCOMM);
if (idx < 0)
return idx;
/* Enable the peripheral clock */
Chip_Clock_EnablePeriphClock((CHIP_SYSCON_CLOCK_T) (SYSCON_CLOCK_FLEXCOMM0 + idx));
/* Reset FlexCOMM */
Chip_SYSCON_PeriphReset((CHIP_SYSCON_PERIPH_RESET_T) (RESET_FLEXCOMM0 + idx));
/* Set the FLEXCOMM to given peripheral */
ret = Chip_FLEXCOMM_SetPeriph(pFCOMM, periph, 0);
if (ret) {
return ret;
}
/* By default enable wakeup from this peripheral */
Chip_SYSCON_EnableWakeup((CHIP_SYSCON_WAKEUP_T) (SYSCON_STARTER_FLEXCOMM0 + idx));
/* Set a default source for this flexcomm */
Chip_Clock_SetFLEXCOMMClockSource(idx, SYSCON_FLEXCOMMCLKSELSRC_FRO12MHZ);
return 0;
}
/**
* @brief Main program body
* @return Does not return
*/
int main(void)
{
/* Generic Initialization */
SystemCoreClockUpdate();
/* Board_Init calls Chip_GPIO_Init and enables GPIO clock if needed,
Chip_GPIO_Init is not called again */
Board_Init();
Board_LED_Set(0, false);
Chip_PININT_Init(LPC_PININT);
/* Configure GPIO pin as input */
Chip_GPIO_SetPinDIRInput(LPC_GPIO, GPIO_PININT_PORT, GPIO_PININT_PIN);
/* Configure pin as GPIO */
Chip_IOCON_PinMuxSet(LPC_IOCON, GPIO_PININT_PORT, GPIO_PININT_PIN,
(IOCON_FUNC0 | IOCON_DIGITAL_EN | IOCON_GPIO_MODE));
/* Configure pin interrupt selection for the GPIO pin in Input Mux Block */
Chip_INMUX_PinIntSel(GPIO_PININT_INDEX, GPIO_PININT_PORT, GPIO_PININT_PIN);
/* Configure channel interrupt as edge sensitive and falling edge interrupt */
Chip_PININT_ClearIntStatus(LPC_PININT, PININTCH(GPIO_PININT_INDEX));
Chip_PININT_SetPinModeEdge(LPC_PININT, PININTCH(GPIO_PININT_INDEX));
Chip_PININT_EnableIntLow(LPC_PININT, PININTCH(GPIO_PININT_INDEX));
/* Enable interrupt in the NVIC */
NVIC_EnableIRQ(PININT_NVIC_NAME);
/* Enable wakeup for PININT0 */
Chip_SYSCON_EnableWakeup(SYSCON_STARTER_PINT0);
/* save the clock source, power down the PLL */
saved_clksrc = Chip_Clock_GetMainClockSource();
/* Go to sleep mode - LED will toggle on each wakeup event */
while (1) {
/* Go to sleep state - will wake up automatically on interrupt */
/* Disable PLL, if previously enabled, prior to sleep */
if (saved_clksrc == SYSCON_MAINCLKSRC_PLLOUT) {
Chip_Clock_SetMainClockSource(SYSCON_MAINCLKSRC_IRC);
Chip_SYSCON_PowerDown(SYSCON_PDRUNCFG_PD_SYS_PLL);
}
/* Lower system voltages to current lock (likely IRC) */
Chip_POWER_SetVoltage(POWER_LOW_POWER_MODE, Chip_Clock_GetMainClockRate());
/* Go to sleep leaving SRAM powered during sleep. Use lower
voltage during sleep. */
Chip_POWER_EnterPowerMode(PDOWNMODE,
(SYSCON_PDRUNCFG_PD_SRAM0A | SYSCON_PDRUNCFG_PD_SRAM0B));
/* On wakeup, restore PLL power if needed */
if (saved_clksrc == SYSCON_MAINCLKSRC_PLLOUT) {
Chip_SYSCON_PowerUp(SYSCON_PDRUNCFG_PD_SYS_PLL);
/* Wait for PLL lock */
while (!Chip_Clock_IsSystemPLLLocked()) {}
Chip_POWER_SetVoltage(POWER_LOW_POWER_MODE, Chip_Clock_GetSystemPLLOutClockRate(false));
/* Use PLL for system clock */
Chip_Clock_SetMainClockSource(SYSCON_MAINCLKSRC_PLLOUT);
}
}
return 0;
}
