ank/ECE3849
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read adc registers

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This commit is contained in:
Andy Killorin 2025-03-27 10:31:30 -04:00
parent 1482a29a0f
commit ac0bd4fc33
Signed by: ank
GPG key ID: 23F9463ECB67FE8C
1 changed files with 4 additions and 2 deletions
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6
sampling.c
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@ -3,6 +3,7 @@
#include "inc/tm4c1294ncpdt.h" #include "inc/tm4c1294ncpdt.h"
#include "driverlib/adc.h" #include "driverlib/adc.h"
#include "sysctl_pll.h" #include "sysctl_pll.h"
#include "inc/hw_types.h"
#define ADC_BUFFER_SIZE 2048 // size must be a power of 2 #define ADC_BUFFER_SIZE 2048 // size must be a power of 2
@ -15,7 +16,8 @@ volatile uint32_t gADCErrors = 0; // number of missed ADC deadlines
void ADC_ISR(void) void ADC_ISR(void)
{ {
// clear ADC1 sequence0 interrupt flag in the ADCISC register // clear ADC1 sequence0 interrupt flag in the ADCISC register
<...>; HWREGBITW(ADC1_ISC_R, 16) = 1;
// check for ADC FIFO overflow // check for ADC FIFO overflow
if(ADC1_OSTAT_R & ADC_OSTAT_OV0) { if(ADC1_OSTAT_R & ADC_OSTAT_OV0) {
gADCErrors++; // count errors gADCErrors++; // count errors
@ -23,7 +25,7 @@ void ADC_ISR(void)
} }
gADCBufferIndex = ADC_BUFFER_WRAP(gADCBufferIndex + 1) gADCBufferIndex = ADC_BUFFER_WRAP(gADCBufferIndex + 1)
// read sample from the ADC1 sequence 0 FIFO // read sample from the ADC1 sequence 0 FIFO
gADCBuffer[gADCBufferIndex] = <...>; gADCBuffer[gADCBufferIndex] = ADC1_SSFIFO0_R & 0xFFF;
} }