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#263 New pwm unit test for start stop reset

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This commit is contained in:
mstroh76
2024-08-23 16:31:53 +02:00
parent 6992794f1d
commit 0ce38bd091
2 changed files with 207 additions and 35 deletions
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172
wiringPi/test/wiringpi_test8_pwm.c Normal file
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@@ -0,0 +1,172 @@
// WiringPi test program: PWM test
// Compile: gcc -Wall wiringpi_test8_pwm.c -o wiringpi_test8_pwm -lwiringPi
#include "wpi_test.h"
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <sys/time.h>
#include <time.h>
#include <stdint.h>
int PWM_OUT[4] = { 18, 12, 13, 19 };
int PWM_IN[4] = { 17, 13, 12, 26 };
volatile int gCounter = 0;
//Interrupt Service Routine for FREQIN
void ISR_FREQIN(void) {
gCounter++;
}
double MeasureAndCheckFreq(const char* msg, double expect_freq) {
double fFrequency;
clock_t CPUClockBegin, CPUClockEnd;
int CountBegin, CountEnd;
double CPUClockInterval, CountInterval;
double elapsed_time, CPULoad;
uint64_t tbegin, tend;
int SleepMs = 1200;
CPUClockBegin = clock();
tbegin = piMicros64();
CountBegin = gCounter;
delay(SleepMs);
CountEnd = gCounter;
CPUClockEnd = clock();
tend = piMicros64();
elapsed_time = (double)(tend-tbegin)/1.0e6;
CountInterval = CountEnd - CountBegin;
CPUClockInterval = CPUClockEnd - CPUClockBegin;
CPULoad = CPUClockInterval*100.0 / CLOCKS_PER_SEC / elapsed_time;
fFrequency = CountInterval / elapsed_time / 1000;
printf("\nInterval: time: %.6f sec (CPU: %3.1f %%), count: %g -> frequency: %.3f kHz\n",
elapsed_time, CPULoad, CountInterval, fFrequency);
CheckSameDouble("Wait for freq. meas.", elapsed_time, SleepMs/1000.0, 0.1); //100ms tolerance. maybe problematic on high freq/cpu load
CheckSameDouble(msg, fFrequency, expect_freq, (expect_freq!=0.0) ? expect_freq*2/100:0.1); //2% tolerance
return fFrequency;
}
int main (void) {
int major, minor;
// char msg[255];
int PWM, FREQIN;
wiringPiVersion(&major, &minor);
printf("WiringPi PWM GPIO test program 8\n");
printf("PWM/ISR test (WiringPi %d.%d)\n", major, minor);
wiringPiSetupGpio() ;
int rev, mem, maker, overVolted, RaspberryPiModel;
piBoardId(&RaspberryPiModel, &rev, &mem, &maker, &overVolted);
CheckNotSame("Model: ", RaspberryPiModel, -1);
switch(RaspberryPiModel) {
case PI_MODEL_5:
return UnitTestState(); //not supported so far
}
PWM = 18;
FREQIN = 17;
printf("Register ISR@%d\n", PWM);
// INT_EDGE_BOTH, INT_EDGE_FALLING, INT_EDGE_RISING only one ISR per input
int result = wiringPiISR(FREQIN, INT_EDGE_RISING, &ISR_FREQIN);
CheckSame("Register ISR", result, 0);
if (result < 0) {
printf("Unable to setup ISR for GPIO %d (%s)\n\n", FREQIN, strerror(errno));
return UnitTestState();
}
printf("Set pwm 0%% and enable PWM output\n");
pwmWrite(PWM, 0); // <-- Allways start with 0 Hz
pinMode(PWM, PWM_OUTPUT); //Mode BAL, pwmr=1024, pwmc=32
delay(250);
double duty_fact = 0.0;
double freq = 0.0;
MeasureAndCheckFreq("PMW BAL without change", freq);
pwmSetMode(PWM_MODE_MS);
delay(250);
MeasureAndCheckFreq("PWM MS without change", freq);
// Now Change values
pwmSetMode(PWM_MODE_BAL);
int pwmc = 1000;
int pwmr = 1024;
int pwm = 512;
pwmSetClock(pwmc);
pwmSetRange(pwmr);
pwmWrite(PWM, pwm);
delay(250);
duty_fact = (double)pwm/(double)pwmr;
printf("duty factor: %g\n", duty_fact);
freq = 19200.0/pwmc*duty_fact;
MeasureAndCheckFreq("PWM BAL with settings", freq);
pwmSetMode(PWM_MODE_MS);
pwmc = 10;
pwmr = 256;
pwm = 171;
pwmSetClock(pwmc);
pwmSetRange(pwmr);
pwmWrite(PWM, pwm);
delay(250);
duty_fact = (double)pwm/(double)pwmr;
printf("duty factor: %g\n", duty_fact);
freq = 19200.0/(double)pwmc/(double)pwmr;
MeasureAndCheckFreq("PWM BAL with settings", freq);
printf("set PWM@GPIO%d (output) off\n", PWM);
pinMode(PWM, PM_OFF);
delay(1000);
MeasureAndCheckFreq("PMW off", 0.0);
printf("Set pwm settings and enable PWM\n");
pwmc = 800;
pwmr = 2048;
pwm = 768;
pwmSetRange(pwmr);
pwmSetClock(pwmc);
pwmWrite(PWM, pwm);
pinMode(PWM, PWM_BAL_OUTPUT);
delay(250);
duty_fact = (double)pwm/(double)pwmr;
printf("duty factor: %g\n", duty_fact);
freq = 19200.0/pwmc*duty_fact;
MeasureAndCheckFreq("PMW BAL start values", freq);
printf("set PWM@GPIO%d (output) off\n", PWM);
pinMode(PWM, PM_OFF);
delay(1000);
MeasureAndCheckFreq("PMW off", 0.0);
printf("Set pwm settings and enable PWM\n");
pwmc = 5;
pwmr = 1024;
pwm = 768;
pwmSetRange(pwmr);
pwmSetClock(pwmc);
pwmWrite(PWM, pwm);
pinMode(PWM, PWM_MS_OUTPUT);
delay(250);
duty_fact = (double)pwm/(double)pwmr;
printf("duty factor: %g\n", duty_fact);
freq = 19200.0/(double)pwmc/(double)pwmr;
MeasureAndCheckFreq("PMW MS start values", freq);
result = wiringPiISRStop(FREQIN);
CheckSame("\n\nRelease ISR", result, 0);
if (result < 0) {
printf("Unable to release ISR for GPIO %d (%s)\n\n", FREQIN, strerror(errno));
return UnitTestState();
}
return UnitTestState();
}

70
wiringPi/test/wiringpi_test9_pwm.c
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@@ -73,41 +73,41 @@ int main (void) {
int rev, mem, maker, overVolted, RaspberryPiModel;
piBoardId(&RaspberryPiModel, &rev, &mem, &maker, &overVolted);
CheckNotSame("Model: ", RaspberryPiModel, -1);
int Pi4 = 0;
double MaxFreq = 100.0;
switch(RaspberryPiModel) {
case PI_MODEL_A:
case PI_MODEL_B:
case PI_MODEL_BP:
case PI_MODEL_AP:
case PI_MODEL_ZERO:
case PI_MODEL_ZERO_W:
case PI_MODEL_CM:
MaxFreq = 13.0; // 12.5 kHz -> ~40% CPU@800 MHz
printf(" - Pi1/BCM2835 detected, will skip tests with frequency above %g kHz\n", MaxFreq);
break;
case PI_MODEL_2:
MaxFreq = 20.0;
printf(" - Pi2/BCM2836 detected, will skip tests with frequency above %g kHz\n", MaxFreq);
break;
case PI_MODEL_3B:
case PI_MODEL_CM3:
case PI_MODEL_3BP:
case PI_MODEL_3AP:
case PI_MODEL_CM3P:
case PI_MODEL_ZERO_2W:
MaxFreq = 50.0;
printf(" - Pi3/BCM2837 detected, will skip tests with frequency above %g kHz\n", MaxFreq);
break;
case PI_MODEL_4B:
case PI_MODEL_400:
case PI_MODEL_CM4:
case PI_MODEL_CM4S:
Pi4 = 1;
break;
case PI_MODEL_5:
return UnitTestState(); //not supported so far
}
int Pi4 = 0;
double MaxFreq = 100.0;
switch(RaspberryPiModel) {
case PI_MODEL_A:
case PI_MODEL_B:
case PI_MODEL_BP:
case PI_MODEL_AP:
case PI_MODEL_ZERO:
case PI_MODEL_ZERO_W:
case PI_MODEL_CM:
MaxFreq = 13.0; // 12.5 kHz -> ~40% CPU@800 MHz
printf(" - Pi1/BCM2835 detected, will skip tests with frequency above %g kHz\n", MaxFreq);
break;
case PI_MODEL_2:
MaxFreq = 20.0;
printf(" - Pi2/BCM2836 detected, will skip tests with frequency above %g kHz\n", MaxFreq);
break;
case PI_MODEL_3B:
case PI_MODEL_CM3:
case PI_MODEL_3BP:
case PI_MODEL_3AP:
case PI_MODEL_CM3P:
case PI_MODEL_ZERO_2W:
MaxFreq = 50.0;
printf(" - Pi3/BCM2837 detected, will skip tests with frequency above %g kHz\n", MaxFreq);
break;
case PI_MODEL_4B:
case PI_MODEL_400:
case PI_MODEL_CM4:
case PI_MODEL_CM4S:
Pi4 = 1;
break;
case PI_MODEL_5:
return UnitTestState(); //not supported so far
}
if (!piBoard40Pin()) {
testruns = 1; // only fist PWM0, supported