/* 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; }