/* Setup a timer for a periodic (repeat mode) rate */
static void setupMRT(uint8_t ch, MRT_MODE_T mode, uint32_t rate)
{
LPC_MRT_CH_T *pMRT;
/* Get pointer to timer selected by ch */
pMRT = Chip_MRT_GetRegPtr(ch);
/* Setup timer with rate based on MRT clock */
Chip_MRT_SetInterval(pMRT, (Chip_Clock_GetSystemClockRate() / rate) |
MRT_INTVAL_LOAD);
/* Timer mode */
Chip_MRT_SetMode(pMRT, mode);
/* Clear pending interrupt and enable timer */
Chip_MRT_IntClear(pMRT);
Chip_MRT_SetEnabled(pMRT);
}
// Pin interrupt, triggered when push button is pressed or released
void PIN_INT0_IRQHandler(void){
// Clear interrupt, in level mode also flips active level
PININT_ClearIntAndFlipActiveLevel(LPC_GPIO_PIN_INT, 1 << 0);
switch (pbState){
case READY:
PININT_DisableLevelInt(LPC_GPIO_PIN_INT, 1 << 0);
Chip_MRT_SetMode(LPC_MRT_CH(0), MRT_MODE_ONESHOT);
Chip_MRT_SetInterval(LPC_MRT_CH(0), (20 * (SystemCoreClock / 1000)) | MRT_INTVAL_LOAD); //20ms
break;
case TRIGGERED:
pbShortPress = true;
Chip_MRT_SetInterval(LPC_MRT_CH(0), MRT_INTVAL_LOAD);
case LONGPRESS:
PININT_EnableLevelInt(LPC_GPIO_PIN_INT, 1 << 0);
PININT_HighActive(LPC_GPIO_PIN_INT, 1 << 0);
}
pbState = READY;
}
// Timer interrupt, used to track press time for long press detection
void MRT0_IRQHandler(void){
if(pbState == READY){
if(Chip_GPIO_GetPinState(LPC_GPIO, 0, PWR_PB_SENSE)){
pbState = TRIGGERED;
PININT_EnableLevelInt(LPC_GPIO_PIN_INT, 1 << 0);
PININT_LowActive(LPC_GPIO_PIN_INT, 1 << 0);
Chip_MRT_SetMode(LPC_MRT_CH(0), MRT_MODE_REPEAT);
Chip_MRT_SetInterval(LPC_MRT_CH(0), (100 * (SystemCoreClock / 1000)) | MRT_INTVAL_LOAD); //100ms
pbTenths = 0;
}else{
PININT_EnableLevelInt(LPC_GPIO_PIN_INT, 1 << 0);
PININT_HighActive(LPC_GPIO_PIN_INT, 1 << 0);
}
}else if(pbState == TRIGGERED){
pbTenths++;
if(pbTenths >= 10){
pbState = LONGPRESS;
pbLongPress = true;
Chip_MRT_SetInterval(LPC_MRT_CH(0), MRT_INTVAL_LOAD);
}
}
}
int32_t main(void) {
int32_t i,cnt=0;
uint8_t RC5_System_prev=0;
uint8_t RC5_Command_prev=0;
CHIP_PMU_MCUPOWER_T mcupower=PMU_MCU_SLEEP;
SystemCoreClockUpdate();
// init GPIO
Chip_GPIO_Init(LPC_GPIO_PORT);
Chip_SYSCTL_PeriphReset(RESET_GPIO);
// init SPI0 at SystemCoreClock speed
Chip_SPI_Init(LPC_SPI0);
Chip_SPI_ConfigureSPI(LPC_SPI0,SPI_MODE_MASTER|
SPI_CLOCK_CPHA0_CPOL0|
SPI_DATA_MSB_FIRST|
SPI_SSEL_ACTIVE_LO);
LPC_SPI0->DIV=0;
Chip_SPI_Enable(LPC_SPI0);
// init MRT
Chip_MRT_Init();
// init SWM
Chip_SWM_Init();
Chip_SWM_DisableFixedPin(SWM_FIXED_SWCLK);//PIO0_3
Chip_SWM_DisableFixedPin(SWM_FIXED_SWDIO);//PIO0_2
Chip_SWM_DisableFixedPin(SWM_FIXED_ACMP_I2);//PIO0_1
Chip_SWM_DisableFixedPin(SWM_FIXED_ACMP_I1);//PIO0_0
Chip_SWM_MovablePinAssign(SWM_SPI0_SCK_IO,CLK_PIN);
Chip_SWM_MovablePinAssign(SWM_SPI0_MOSI_IO,MOSI_PIN);
Chip_SWM_MovablePinAssign(SWM_CTIN_0_I,IR_PIN);
Chip_SWM_Deinit();
// init onboard LED
Chip_GPIO_SetPinState(LPC_GPIO_PORT,0,LED_PIN,true);
Chip_GPIO_SetPinDIROutput(LPC_GPIO_PORT,0,LED_PIN);
// init LCD reset pin
Chip_GPIO_SetPinDIROutput(LPC_GPIO_PORT,0,RESET_PIN);
// init LCD
LCDInit();
LCDClearScreenBlack();
// init SCT
Chip_SCT_Init(LPC_SCT);
// set prescaler, SCT clock = 1 MHz, clear counter
LPC_SCT->CTRL_L |= SCT_CTRL_PRE_L(SystemCoreClock/1000000-1) | SCT_CTRL_CLRCTR_L;
sct_fsm_init();
NVIC_EnableIRQ(SCT_IRQn);
// init PIO0_3 pin interrupt for wakeup from sleep mode
Chip_SYSCTL_SetPinInterrupt(IR_IRQ,IR_PIN);
Chip_PININT_EnableIntLow(LPC_PININT, PININTCH(IR_IRQ));
NVIC_EnableIRQ(PININT3_IRQn);
Chip_SYSCTL_EnablePINTWakeup(IR_IRQ);
// set sleep options
Chip_SYSCTL_SetDeepSleepPD(SYSCTL_DEEPSLP_BOD_PD | SYSCTL_DEEPSLP_WDTOSC_PD);
Chip_SYSCTL_SetWakeup(~(SYSCTL_SLPWAKE_IRCOUT_PD | SYSCTL_SLPWAKE_IRC_PD | SYSCTL_SLPWAKE_FLASH_PD ));
LCDPutStr("kbiva.wordpress.com", MAX_X / 2 + 50, 10, WHITE, BLACK);
LCDPutStr("RC5 Decoder", MAX_X / 2 + 35, 35, WHITE, BLACK);
LCDPutStr("Frame:", MAX_X / 2 + 20, 1, WHITE, BLACK);
LCDPutStr("System:", MAX_X / 2 + 5 , 1, WHITE, BLACK);
LCDPutStr("Cmd:", MAX_X / 2 - 10, 1, WHITE, BLACK);
LCDPutStr("Toggle:", MAX_X / 2 - 25, 1, WHITE, BLACK);
LCDPutStr("Count:", MAX_X / 2 - 40, 1, WHITE, BLACK);
while (1) {
// put chip to sleep
switch(mcupower) {
case PMU_MCU_SLEEP:
default:
LCDPutStr("SLEEP ", MAX_X / 2 - 60, 10, WHITE, BLACK);
Chip_PMU_SleepState(LPC_PMU);
break;
case PMU_MCU_DEEP_SLEEP:
LCDPutStr("DEEP-SLEEP", MAX_X / 2 - 60, 10, WHITE, BLACK);
Chip_PMU_DeepSleepState(LPC_PMU);
break;
case PMU_MCU_POWER_DOWN:
LCDPutStr("POWER-DOWN", MAX_X / 2 - 60, 10, WHITE, BLACK);
Chip_PMU_PowerDownState(LPC_PMU);
break;
}
// start MRT timer channel 0
Chip_MRT_SetInterval(LPC_MRT_CH0, SystemCoreClock | MRT_INTVAL_LOAD);
Chip_MRT_SetMode(LPC_MRT_CH0,MRT_MODE_ONESHOT);
Chip_MRT_SetEnabled(LPC_MRT_CH0);
// turn on onboard LED
Chip_GPIO_SetPinState(LPC_GPIO_PORT,0,LED_PIN,false);
// start SCT
LPC_SCT->CTRL_L &= ~SCT_CTRL_HALT_L;
// wait for timeout
while(!RC5_timeout)
{};
// stop SCT
LPC_SCT->CTRL_L |= SCT_CTRL_HALT_L;
if (RC5_flag) {
// if frame received, output information on LCD
if((RC5_System != RC5_System_prev) || (RC5_Command != RC5_Command_prev)) {
cnt = 1;
}
else {
cnt++;
}
for (i = 3; i >= 0; i--){
LCDPutChar(ascii[(RC5_Frame >> (i * 4)) & 0x0F],MAX_X / 2 + 20,80+(3-i)*7,WHITE, BLACK);
if(i < 2) {
if((RC5_System!=RC5_System_prev) || (RC5_Command!=RC5_Command_prev)){
LCDPutChar(ascii[(RC5_System >> (i * 4)) & 0x0F],MAX_X / 2 + 5,66+(3-i)*7,WHITE, BLACK);
LCDPutChar(ascii[(RC5_Command >> (i * 4)) & 0x0F],MAX_X / 2 - 10,66+(3-i)*7,WHITE, BLACK);
}
}
LCDPutChar(ascii[(cnt >> (i * 4)) & 0x0F],MAX_X / 2 - 40,80+(3-i)*7,WHITE, BLACK);
}
LCDPutStr(RC5_Toggle ? "ON ":"OFF", MAX_X / 2 - 25, 80, WHITE, BLACK);
switch(RC5_Command) {
case 0x50:
mcupower = PMU_MCU_SLEEP;
break;
case 0x55:
if(RC5_Toggle){
spi0Transfer(SLEEPOUT);
spi0Transfer(DISPON);
}
else {
spi0Transfer(DISPOFF);
spi0Transfer(SLEEPIN);
}
break;
case 0x56:
mcupower = PMU_MCU_DEEP_SLEEP;
break;
case 0x6B:
mcupower = PMU_MCU_POWER_DOWN;
break;
}
RC5_System_prev = RC5_System;
RC5_Command_prev = RC5_Command;
}
// turn off onboard LED
Chip_GPIO_SetPinState(LPC_GPIO_PORT,0,LED_PIN,true);
// clear flags
RC5_flag = 0;
RC5_timeout = 0;
}