/* Set up and initialize all required blocks and functions related to the
board hardware */
void Board_Init(void)
{
QUICKJACK_IO_Init();
/* Initialize GPIO */
Chip_GPIO_Init(LPC_GPIO_PORT);
/* Initialize the LEDs */
Board_LED_Init();
// init sensor switch
SensorSwitch_Init();
/* Configure GPIO pin as input pin */
Chip_GPIO_SetPinDIRInput(LPC_GPIO_PORT, 0, 0);
/* MCU Tx Pin initialize */
Chip_IOCON_PinSetMode(LPC_IOCON, QUICKJACKTXPIN, PIN_MODE_INACTIVE);
Chip_GPIO_SetPinDIROutput(LPC_GPIO_PORT, 0, QUICKJACKTXPINNUM);
Chip_GPIO_SetPinState(LPC_GPIO_PORT, 0, QUICKJACKTXPINNUM, 1);
/* MCU Rx Pin initialize */
Chip_IOCON_PinSetMode(LPC_IOCON, QUICKJACKRXPIN, PIN_MODE_INACTIVE);
/* Configure analog comparator for Manchester Rx */
Chip_SWM_FixedPinEnable(SWM_FIXED_ACMP_I1, 1);
Chip_ACMP_Init(LPC_CMP);
Chip_ACMP_SetPosVoltRef(LPC_CMP, ACMP_POSIN_ACMP_I1);
Chip_ACMP_SetNegVoltRef(LPC_CMP, ACMP_NEGIN_VLO);
Chip_ACMP_SetupVoltLadder(LPC_CMP, (15<<1), false);
Chip_ACMP_EnableVoltLadder(LPC_CMP);
Chip_ACMP_SetHysteresis(LPC_CMP, ACMP_HYS_10MV);
Chip_ACMP_SetEdgeSelection(LPC_CMP, ACMP_EDGESEL_RISING);
/* Uncomment below 2 lines to connect analog comparator output to P1_0 (not needed for normal operation) */
// Chip_SWM_FixedPinEnable(SWM_FIXED_ACMP_I2, 0);
// Chip_SWM_MovablePinAssign(SWM_ACMP_O_O, 1);
Chip_ACMP_EdgeClear(LPC_CMP);
NVIC_EnableIRQ(CMP_IRQn);
/* Disable clocks to SWM and IOCON to save power */
Chip_Clock_DisablePeriphClock(SYSCTL_CLOCK_SWM);
Chip_Clock_DisablePeriphClock(SYSCTL_CLOCK_IOCON);
}
/**
* @brief Main program body
* @return Does not return
*/
int main(void)
{
/* initialize the board */
SystemCoreClockUpdate();
Board_Init();
Board_LED_Set(0, false);
/* initialize the ACMP */
Chip_ACMP_Init(LPC_CMP);
/* Setup board specific ACMP pin muxing */
Init_ACMP_PinMux();
/* Positive and negative references, no hysteresis */
Chip_ACMP_SetupACMPRefs(LPC_CMP, CMP_INDEX, ACMP_POSIN_ADCIN_1, ACMP_NEGIN_VREF_DIV, ACMP_HYS_NONE);
/* Edge triggered interrupt on both edges*/
Chip_ACMP_SetupACMPInt(LPC_CMP, CMP_INDEX, false, false, ACMP_EDGESEL_BOTH);
Chip_ACMP_EnableCompInt(LPC_CMP, CMP_INDEX);
Chip_ACMP_SetupVoltLadder(LPC_CMP, CMP_INDEX, 0x15, false);
Chip_ACMP_EnableVoltLadder(LPC_CMP, CMP_INDEX);
/* Setup Comparator Filter register to bypass filter and use SysClk without any division */
Chip_ACMP_SetCompFiltReg(LPC_CMP, CMP_INDEX, ACMP_SMODE_0, ACMP_CLKDIV_1);
/* Enable Comparator */
Chip_ACMP_EnableComp(LPC_CMP, CMP_INDEX);
/* Enable the Interrupt for the compare output */
NVIC_EnableIRQ(CMP3_IRQ);
while (1) {
/* Enter low power mode until interrupt */
__WFI();
if (Chip_ACMP_GetCompStatus(LPC_CMP, CMP_INDEX)) {
Board_LED_Set(0, true);
}
else {
Board_LED_Set(0, false);
}
}
return 0;
}
int __attribute__ ((noinline)) main(void)
{
/* set systick and start systick interrupt */
SysTick_Config(SYS_CORE_CLOCK/1000UL*(unsigned long)SYS_TICK_PERIOD_IN_MS);
/* turn on GPIO */
Chip_GPIO_Init(LPC_GPIO_PORT);
/* disable SWCLK and SWDIO, after reset, boot code may activate this */
Chip_SWM_DisableFixedPin(2);
Chip_SWM_DisableFixedPin(3);
/* turn on IOCON */
Chip_Clock_EnablePeriphClock(SYSCTL_CLOCK_IOCON);
/* turn on switch matrix */
Chip_SWM_Init();
/* activate analog comperator */
Chip_ACMP_Init(LPC_CMP);
/* let LED on pin 4 of the DIP8 blink */
Chip_GPIO_SetPinDIROutput(LPC_GPIO_PORT, 0, 2);
for(;;)
{
Chip_GPIO_SetPinOutHigh(LPC_GPIO_PORT, 0, 2);
delay_micro_seconds(500000UL);
Chip_GPIO_SetPinOutLow(LPC_GPIO_PORT, 0, 2);
delay_micro_seconds(500000UL);
}
/* enter sleep mode: Reduce from 1.4mA to 0.8mA with 12MHz */
while (1)
{
SCB->SCR |= (1UL << SCB_SCR_SLEEPONEXIT_Pos); /* enter sleep mode after interrupt */
Chip_PMU_SleepState(LPC_PMU); /* enter sleep mode now */
}
}