Tool/software: Code Composer Studio
Hi friends!
I have modified the initial code about temperature sensor for read by ADC P8.4 a measurement of my conditioner.
It's run well.
Now, I need to read other two signals by the ports 8.5 and 8.6. Then I will operate similary that 8.4
I never have worked with ADC and I dont know the form I can do it.
Can you help me?
Thanks!
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/*******************************************************************************
*
* TempSensorMode.c
*
* Simple thermometer application that uses the internal temperature sensor to
* measure and display die temperature on the segmented LCD screen
*
* February 2015
* E. Chen
*
******************************************************************************/
#include <driverlib.h>
#include "TempSensorMode.h"
#include "hal_LCD.h"
#include <math.h>
volatile unsigned char tempUnit = 0; // Temperature Unit
signed long degC; // Celcius measurement
signed long degF; // Fahrenheit measurement
// TimerA UpMode Configuration Parameter
Timer_A_initUpModeParam initUpParam_A1 =
{
TIMER_A_CLOCKSOURCE_ACLK, // ACLK Clock Source
TIMER_A_CLOCKSOURCE_DIVIDER_1, // ACLK/1 = 32768Hz
0x2000, // Timer period
TIMER_A_TAIE_INTERRUPT_DISABLE, // Disable Timer interrupt
TIMER_A_CCIE_CCR0_INTERRUPT_DISABLE , // Disable CCR0 interrupt
TIMER_A_DO_CLEAR // Clear value
};
Timer_A_initCompareModeParam initCompParam =
{
TIMER_A_CAPTURECOMPARE_REGISTER_1, // Compare register 1
TIMER_A_CAPTURECOMPARE_INTERRUPT_DISABLE, // Disable Compare interrupt
TIMER_A_OUTPUTMODE_RESET_SET, // Timer output mode 7
0x1000 // Compare value
};
void tempSensor()
{
//Enter LPM3 mode with interrupts enabled
while(mode == TEMPSENSOR_MODE)
{
__bis_SR_register(LPM3_bits | GIE); // LPM3 with interrupts enabled
__no_operation(); // Only for debugger
P8DIR |= BIT7;
P8OUT |= BIT7;
// P9OUT |= BIT7; // Turn LED2 On
if (tempSensorRunning)
{
// Turn LED1 on when waking up to calculate temperature and update display
P1OUT |= BIT0;
// Calculate Temperature in degree C and F
signed long temp = ADC12MEM0;
degC = (484.8417005+(sqrt(1472.66038-0.09269042969*(long)temp))/-0.075932)*100;
degF = (long)temp;
// Update temperature on LCD
displayTemp();
P1OUT &= ~BIT0;
}
}
}
void tempSensorModeInit()
{
tempSensorRunning = 1;
displayScrollText("TEMPSENSOR MODE");
RTC_C_holdClock(RTC_C_BASE); // Stop stopwatch
RTC_C_holdCounterPrescale(RTC_C_BASE, RTC_C_PRESCALE_0);
// Select internal ref = 1.2V //CAMBIAMOS A 2.5V
Ref_A_setReferenceVoltage(REF_A_BASE,
REF_A_VREF2_5V);
// Internal Reference ON
Ref_A_enableReferenceVoltage(REF_A_BASE);
// Enables the internal temperature sensor
Ref_A_enableTempSensor(REF_A_BASE);
while(!Ref_A_isVariableReferenceVoltageOutputReady(REF_A_BASE));
// Initialize the ADC12B Module
/*
* Base address of ADC12B Module
* Use internal ADC12B bit as sample/hold signal to start conversion
* USE MODOSC 5MHZ Digital Oscillator as clock source
* Use default clock divider/pre-divider of 1
* Use Temperature Sensor internal channel
*/
ADC12_B_initParam initParam = {0};
P8SEL1 |= BIT4; //Set P8.4 as Analog Input, A7
P8SEL0 |= BIT4;
P8SEL1 |= BIT5; //Set P8.5 as Analog Input, A6
P8SEL0 |= BIT5;
P8SEL1 |= BIT6; //Set P8.6 as Analog Input, A5
P8SEL0 |= BIT6;
initParam.sampleHoldSignalSourceSelect = ADC12_B_SAMPLEHOLDSOURCE_4;
initParam.clockSourceSelect = ADC12_B_CLOCKSOURCE_ADC12OSC;
initParam.clockSourceDivider = ADC12_B_CLOCKDIVIDER_1;
initParam.clockSourcePredivider = ADC12_B_CLOCKPREDIVIDER__1;
initParam.internalChannelMap = ADC12_B_NOINTCH; // Estaba esto ADC12_B_TEMPSENSEMAP
ADC12_B_init(ADC12_B_BASE, &initParam);
// Enable the ADC12B module
ADC12_B_enable(ADC12_B_BASE);
/*
* Base address of ADC12B Module
* For memory buffers 0-7 sample/hold for 256 clock cycles
* For memory buffers 8-15 sample/hold for 4 clock cycles (default)
* Disable Multiple Sampling
*/
ADC12_B_setupSamplingTimer(ADC12_B_BASE,
ADC12_B_CYCLEHOLD_256_CYCLES,
ADC12_B_CYCLEHOLD_4_CYCLES,
ADC12_B_MULTIPLESAMPLESDISABLE);
// Configure Memory Buffer
/*
* Base address of the ADC12B Module
* Configure memory buffer 0
* Map input A30 to memory buffer 0
* Vref+ = VRef+
* Vref- = Vref-
* Memory buffer 0 is the end of a sequence
*/
ADC12_B_configureMemoryParam configureMemoryParam = {0};
configureMemoryParam.memoryBufferControlIndex = ADC12_B_MEMORY_0;
configureMemoryParam.inputSourceSelect = ADC12_B_INPUT_A7;
configureMemoryParam.refVoltageSourceSelect =
ADC12_B_VREFPOS_INTBUF_VREFNEG_VSS;
configureMemoryParam.endOfSequence = ADC12_B_ENDOFSEQUENCE;
configureMemoryParam.windowComparatorSelect =
ADC12_B_WINDOW_COMPARATOR_DISABLE;
configureMemoryParam.differentialModeSelect =
ADC12_B_DIFFERENTIAL_MODE_DISABLE;
ADC12_B_configureMemory(ADC12_B_BASE, &configureMemoryParam);
ADC12_B_clearInterrupt(ADC12_B_BASE,
0,
ADC12_B_IFG0
);
// Enable memory buffer 0 interrupt
ADC12_B_enableInterrupt(ADC12_B_BASE,
ADC12_B_IE0,
0,
0);
// Start ADC conversion
ADC12_B_startConversion(ADC12_B_BASE, ADC12_B_START_AT_ADC12MEM0, ADC12_B_REPEATED_SINGLECHANNEL);
// TimerA1.1 (125ms ON-period) - ADC conversion trigger signal
Timer_A_initUpMode(TIMER_A1_BASE, &initUpParam_A1);
// Initialize compare mode to generate PWM1
Timer_A_initCompareMode(TIMER_A1_BASE, &initCompParam);
// Start timer A1 in up mode
Timer_A_startCounter(TIMER_A1_BASE,
TIMER_A_UP_MODE
);
// Check if any button is pressed
Timer_A_initUpMode(TIMER_A0_BASE, &initUpParam_A0);
__bis_SR_register(LPM3_bits | GIE); // enter LPM3
__no_operation();
}
void displayTemp()
{
clearLCD();
// Pick C or F depending on tempUnit state
signed long deg;
if (tempUnit == 0)
{
showChar('C',pos6);
deg = degC;
}
else
{
showChar('V',pos6);
deg = degF;
}
// Handle negative values
if (deg < 0)
{
deg *= -1;
// Negative sign
LCDMEM[pos1+1] |= 0x04; //LCDMEM[pos1+1] |= 0x04;
}
// Handles displaying up to 999.9 degrees
if (deg>=1000)
showChar((deg/1000)%10 + '0',pos2);
if (deg>=100)
showChar((deg/100)%10 + '0',pos3);
if (deg>=10)
showChar((deg/10)%10 + '0',pos4);
if (deg>=1)
showChar((deg/1)%10 + '0',pos5);
// Decimal point
LCDMEM[pos3+1] |= 0x01;
// Degree symbol
LCDMEM[pos5+1] |= 0x04;
}
