void setup_adc(){
/* Setting reference voltage to 2.5 and enabling reference */
REF_A_setReferenceVoltage(REF_A_VREF2_5V);
MAP_REF_A_enableReferenceVoltage();
MAP_ADC14_enableModule();
//~47 KHz
MAP_ADC14_initModule(ADC_CLOCKSOURCE_MCLK, ADC_PREDIVIDER_32, ADC_DIVIDER_2, 0);
/* Configuring GPIOs for Analog In */
MAP_GPIO_setAsPeripheralModuleFunctionInputPin(GPIO_PORT_P5,
GPIO_PIN5 | GPIO_PIN4 | GPIO_PIN3 | GPIO_PIN2, GPIO_TERTIARY_MODULE_FUNCTION);
/* Configuring ADC Memory (ADC_MEM0 - ADC_MEM7 (A0 - A1) with no repeat)
* with internal 2.5v reference */
MAP_ADC14_configureMultiSequenceMode(ADC_MEM0, ADC_MEM3, true);
MAP_ADC14_configureConversionMemory(ADC_MEM0, ADC_VREFPOS_INTBUF_VREFNEG_VSS, ADC_INPUT_A0, false);
MAP_ADC14_configureConversionMemory(ADC_MEM1, ADC_VREFPOS_INTBUF_VREFNEG_VSS, ADC_INPUT_A1, false);
MAP_ADC14_configureConversionMemory(ADC_MEM2, ADC_VREFPOS_INTBUF_VREFNEG_VSS, ADC_INPUT_A2, false);
MAP_ADC14_configureConversionMemory(ADC_MEM3, ADC_VREFPOS_INTBUF_VREFNEG_VSS, ADC_INPUT_A3, false);
/* Setting up the sample timer to automatically step through the sequence convert.*/
MAP_ADC14_enableSampleTimer(ADC_AUTOMATIC_ITERATION);
/* Triggering the start of the sample */
MAP_ADC14_enableConversion();
MAP_ADC14_toggleConversionTrigger();
}
int main(void)
{
/* Halting WDT */
MAP_WDT_A_holdTimer();
MAP_Interrupt_enableSleepOnIsrExit();
resPos = 0;
/* Setting up clocks
* MCLK = MCLK = 3MHz
* ACLK = REFO/4 = 32Khz */
MAP_CS_initClockSignal(CS_ACLK, CS_REFOCLK_SELECT, CS_CLOCK_DIVIDER_1);
/* Initializing ADC (MCLK/1/1) */
MAP_ADC14_enableModule();
MAP_ADC14_initModule(ADC_CLOCKSOURCE_MCLK, ADC_PREDIVIDER_1, ADC_DIVIDER_1,
0);
/* Configuring GPIOs (5.5 A0) */
MAP_GPIO_setAsPeripheralModuleFunctionInputPin(GPIO_PORT_P5, GPIO_PIN5,
GPIO_TERTIARY_MODULE_FUNCTION);
/* Configuring ADC Memory */
MAP_ADC14_configureSingleSampleMode(ADC_MEM0, true);
MAP_ADC14_configureConversionMemory(ADC_MEM0, ADC_VREFPOS_AVCC_VREFNEG_VSS,
ADC_INPUT_A0, false);
/* Configuring Timer_A in continuous mode and sourced from ACLK */
MAP_Timer_A_configureContinuousMode(TIMER_A0_MODULE, &continuousModeConfig);
/* Configuring Timer_A0 in CCR1 to trigger at 16000 (0.5s) */
MAP_Timer_A_initCompare(TIMER_A0_MODULE, &compareConfig);
/* Configuring the sample trigger to be sourced from Timer_A0 and setting it
* to automatic iteration after it is triggered*/
MAP_ADC14_setSampleHoldTrigger(ADC_TRIGGER_SOURCE1, false);
/* Enabling the interrupt when a conversion on channel 1 is complete and
* enabling conversions */
MAP_ADC14_enableInterrupt(ADC_INT0);
MAP_ADC14_enableConversion();
/* Enabling Interrupts */
MAP_Interrupt_enableInterrupt(INT_ADC14);
MAP_Interrupt_enableMaster();
/* Starting the Timer */
MAP_Timer_A_startCounter(TIMER_A0_MODULE, TIMER_A_CONTINUOUS_MODE);
/* Going to sleep */
while (1)
{
MAP_PCM_gotoLPM0();
}
}
int main(void)
{
WDT_A_holdTimer();
//Configure Timer
unsigned int dcoFrequency = 3E+6;
MAP_CS_setDCOFrequency(dcoFrequency);
MAP_CS_initClockSignal(CS_SMCLK, CS_DCOCLK_SELECT, CS_CLOCK_DIVIDER_1); // ( 3Mhz / 64 ) / (Period = 46875) = 1 second
//Set LED's as outputs and turn off
MAP_GPIO_setAsOutputPin(GPIO_PORT_P1,GPIO_PIN0);
MAP_GPIO_setAsOutputPin(GPIO_PORT_P2,GPIO_PIN0);
MAP_GPIO_setOutputLowOnPin(GPIO_PORT_P1, GPIO_PIN0);
MAP_GPIO_setOutputLowOnPin(GPIO_PORT_P2, GPIO_PIN0);
////////////////////////////////////////////////////////////////////////////////////////////////////
// ADC INITILIZATION P5.5
////////////////////////////////////////////////////////////////////////////////////////////////////
/* Initializing ADC */
MAP_ADC14_enableModule();
GPIO_setAsPeripheralModuleFunctionInputPin(GPIO_PORT_P5, GPIO_PIN5, GPIO_TERTIARY_MODULE_FUNCTION); //writes 0's in PXSEL registers for pins 1.2 and 1.3
MAP_ADC14_setResolution(ADC_10BIT); // initialize to use a 10 Bit ADC
MAP_ADC14_initModule(ADC_CLOCKSOURCE_SMCLK, ADC_PREDIVIDER_1, ADC_DIVIDER_1,0);
/* Configuring ADC Memory */
MAP_ADC14_configureSingleSampleMode(ADC_MEM0, false); //put results in this 16 bit register location to hold results, false means we are manually triggering
MAP_ADC14_configureConversionMemory(ADC_MEM0, ADC_VREFPOS_AVCC_VREFNEG_VSS, ADC_INPUT_A0, false); //pin 5.5 is tied to channel 0 (A0)
/* Configuring Sample Timer */
MAP_ADC14_enableSampleTimer(ADC_MANUAL_ITERATION);
//Timer A setup
MAP_Timer_A_configureUpMode(TIMER_A0_MODULE, &upConfig0);
Interrupt_enableInterrupt(INT_TA0_0);
Timer_A_startCounter(TIMER_A0_MODULE, TIMER_A_UP_MODE);
/* Enabling/Toggling Conversion */
MAP_ADC14_enableConversion();
MAP_ADC14_toggleConversionTrigger();
////////////////////////////////////////////////////////////////////////////////////////////////////
// END ADC
////////////////////////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////////////////////////
// Timer A 2 and PWM on P5.6
////////////////////////////////////////////////////////////////////////////////////////////////////
GPIO_setAsPeripheralModuleFunctionOutputPin(GPIO_PORT_P5, GPIO_PIN6, GPIO_PRIMARY_MODULE_FUNCTION); //writes 0's in PXSEL registers for pins 1.2 and 1.3
// Set Timer A period (PWM signal period)
TA2CCR0 = 10000 ; // i think i wrote this wring, his example he showed in class is is 10000
// Set Duty cycle
TA2CCR1 = DUTY_CYCLE * 10000; //inital DutyCycle of 0%.. Duty_Cycle is macro
// Set output mode to Reset/Set
TA2CCTL1 = OUTMOD_7 ; // Macro which is equal to 0x00e0, defined in msp432p401r.h
// Initialize Timer A
TA2CTL = TASSEL__SMCLK | MC__UP | TACLR ; // this bitwise or’s multiple settings at the same time (this just sets different bits in the register to set these functionalities/settings)
//Does this start the timer?? (is next line necessary?)
Timer_A_startCounter(TIMER_A2_MODULE, TIMER_A_UP_MODE);
////////////////////////////////////////////////////////////////////////////////////////////////////
// END Timer A 2 and PWM on 5.6
////////////////////////////////////////////////////////////////////////////////////////////////////
Interrupt_enableMaster() ;
while(1){
while(MAP_ADC14_isBusy()==0){ // poll the busy flag. we have a conversion going bc we already triggerted it above, so we are waiting for the conversion to be done, when it is, we are going to call the get result function. this just returns the 16 bit value rsults
ADC_result = (uint16_t)MAP_ADC14_getResult(ADC_MEM0); //just goes to memory location takes results and returns the 16 bit value... this just continues to get repopulted.
MAP_ADC14_toggleConversionTrigger(); ////once we got the result we start a new conversion and we go back to top and begin wiaitng until its dones again
}//end nested while
}//end inf while
}//end main