//------------------------------------------------------------------------------
int InitOneWire(void)
{
int err = 0;
/* Configuring Timer_A0 for Up Mode */
MAP_Timer_A_configureUpMode(TIMER_A0_BASE, &upConfig);
// enable timer interrupts (more configuration done in dht22.c)
MAP_Timer_A_enableInterrupt(TIMER_A0_BASE);
return err;
}
void SetTimerA0_0Period(uint32_t periodConfigA0)
{
const Timer_A_UpModeConfig upConfig =
{
TIMER_A_CLOCKSOURCE_ACLK, // SMCLK Clock Source
TIMER_A_CLOCKSOURCE_DIVIDER_1, // SMCLK = 48 MHZ
periodConfigA0,
TIMER_A_TAIE_INTERRUPT_DISABLE, // Disable Timer interrupt
TIMER_A_CCIE_CCR0_INTERRUPT_ENABLE,// Enable CCR0 interrupt
TIMER_A_DO_CLEAR // Clear value
};
MAP_Timer_A_configureUpMode(TIMER_A0_MODULE, &upConfig);
}
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
