Part Number: MSP432P401R
Tool/software: TI C/C++ Compiler
I am trying to read in 2 signals through the ADC pins. Whenever I run the code, only the first ADC pin value is stored. During debugging, I found out that the registers ADC14MEM0 and ADC14MEM1 change values but the change is only reflected in the variable that stores the value of ADC14MEM0.
Also I dont know if this is useful or not but the voltage values being read in are from a pair of analog proximity sensors that are powered with 3.3V from the Microcontroller.
Below is my code setup;
/* DriverLib Includes */
#include <ti/devices/msp432p4xx/driverlib/driverlib.h>
/* Standard Includes */
#include <stdint.h>
#include <string.h>
static uint16_t resultsBuffer[2];
int main(void)
{
/* Halting WDT */
MAP_WDT_A_holdTimer();
MAP_Interrupt_enableSleepOnIsrExit();
/* Zero-filling buffer */
memset(resultsBuffer, 0x00, 2);
//![Simple REF Example]
/* Setting reference voltage to 2.5 and enabling reference */
// MAP_REF_A_setReferenceVoltage(REF_A_VREF2_5V);
MAP_REF_A_enableReferenceVoltage();
//![Simple REF Example]
/* Initializing ADC (MCLK/1/1) */
MAP_ADC14_enableModule();
MAP_ADC14_initModule(ADC_CLOCKSOURCE_MCLK, ADC_PREDIVIDER_1, ADC_DIVIDER_1,
0);
/* Configuring GPIOs for Analog In */
MAP_GPIO_setAsPeripheralModuleFunctionInputPin(GPIO_PORT_P5,
GPIO_PIN5 | GPIO_PIN4, GPIO_TERTIARY_MODULE_FUNCTION);
/* Configuring ADC Memory (ADC_MEM0 - ADC_MEM7 (A0 - A7) with no repeat)
* with internal 2.5v reference */
MAP_ADC14_configureMultiSequenceMode(ADC_MEM0, ADC_MEM1, true);
MAP_ADC14_configureConversionMemory(ADC_MEM0,
ADC_VREFPOS_AVCC_VREFNEG_VSS,
ADC_INPUT_A0, false);
MAP_ADC14_configureConversionMemory(ADC_MEM1,
ADC_VREFPOS_AVCC_VREFNEG_VSS,
ADC_INPUT_A1, false);
/* Enabling the interrupt when a conversion on channel 7 (end of sequence)
* is complete and enabling conversions */
MAP_ADC14_enableInterrupt(ADC_INT1);
/* Enabling Interrupts */
MAP_Interrupt_enableInterrupt(INT_ADC14);
MAP_Interrupt_enableMaster();
/* Setting up the sample timer to automatically step through the sequence
* convert.
*/
MAP_ADC14_enableSampleTimer(ADC_AUTOMATIC_ITERATION);
//ADC14_setSampleHoldTime(ADC_PULSE_WIDTH_64, ADC_PULSE_WIDTH_64);
/* Triggering the start of the sample */
MAP_ADC14_enableConversion();
MAP_ADC14_toggleConversionTrigger();
/* Going to sleep */
while (1)
{
MAP_PCM_gotoLPM0();
}
}
/* This interrupt is fired whenever a conversion is completed and placed in
* ADC_MEM7. This signals the end of conversion and the results array is
* grabbed and placed in resultsBuffer */
void ADC14_IRQHandler(void)
{
uint64_t status;
status = MAP_ADC14_getEnabledInterruptStatus();
MAP_ADC14_clearInterruptFlag(status);
if(status & ADC_INT1)
{
MAP_ADC14_getMultiSequenceResult(resultsBuffer);
}
}
