117 lines
3.0 KiB
C
117 lines
3.0 KiB
C
// WiringPi test program: benchmark
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// Compile: gcc -Wall wiringpi_test7_bench.c -o wiringpi_test7_bench -lwiringPi
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#include "wpi_test.h"
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//#include <stdio.h>
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//#include <stdlib.h>
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//#include <signal.h>
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#include <string.h>
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#include <time.h>
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#include <sys/time.h>
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int ToggleValue = 240000000;
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float fExpectMHzdigitalWrite = 10;
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float fExpectMHzpinMode = 4;
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int GPIO = 19;
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int GPIOIN = 26;
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int RaspberryPiModel = -1;
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void ReportElaped(const char* msg, const float fExpectMHz, struct timeval t1, struct timeval t2) {
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double elapsedTime, fTimePerOperation, fFreq;
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elapsedTime = (t2.tv_sec-t1.tv_sec)+(t2.tv_usec-t1.tv_usec)/1000000.0;
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fTimePerOperation = elapsedTime*1000000.0/ToggleValue;
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fFreq = ToggleValue/elapsedTime/1000000.0;
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printf(" % 9d toggle took %.3f s, Time per toggle %.3f us, Freq %.3f MHz \n",
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ToggleValue, elapsedTime, fTimePerOperation, fFreq);
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CheckSameFloat(msg, fFreq, fExpectMHz, fExpectMHz*0.2f);
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}
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int main (void) {
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struct timeval t1, t2;
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if (wiringPiSetupGpio() == -1) {
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printf("wiringPiSetupGpio failed\n\n");
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exit(EXIT_FAILURE);
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}
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int rev, mem, maker, overVolted;
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piBoardId(&RaspberryPiModel, &rev, &mem, &maker, &overVolted);
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CheckNotSame("Model: ", RaspberryPiModel, -1);
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if (!piBoard40Pin()) {
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GPIO = 23;
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GPIOIN = 24;
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}
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switch(RaspberryPiModel) {
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case PI_MODEL_A:
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case PI_MODEL_B:
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case PI_MODEL_BP:
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case PI_MODEL_AP:
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case PI_MODEL_ZERO:
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case PI_MODEL_ZERO_W:
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case PI_MODEL_CM:
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ToggleValue /= 8;
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break;
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case PI_MODEL_2:
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ToggleValue /= 4;
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break;
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case PI_MODEL_3B:
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case PI_MODEL_CM3:
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case PI_MODEL_3BP:
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case PI_MODEL_3AP:
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case PI_MODEL_CM3P:
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case PI_MODEL_ZERO_2W:
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ToggleValue /= 2;
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break;
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case PI_MODEL_4B:
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case PI_MODEL_400:
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case PI_MODEL_CM4:
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case PI_MODEL_CM4S:
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ToggleValue = ToggleValue;
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fExpectMHzdigitalWrite = 24.5; //MHz;
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fExpectMHzpinMode = 4.1;
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break;
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case PI_MODEL_5:
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ToggleValue *= 2;
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break;
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}
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printf("WiringPi GPIO speed test program (using GPIO %d) and toggle %d times\n", GPIO, ToggleValue);
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printf(" testing digital Wirte and pinMode\n");
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pinMode(GPIO, OUTPUT);
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printf("toggle % 3d million times pin value ...\n", ToggleValue/1000000);
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gettimeofday(&t1, NULL);
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for (int loop=1; loop<ToggleValue; loop++) {
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digitalWrite(GPIO, LOW);
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digitalWrite(GPIO, HIGH);
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}
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gettimeofday(&t2, NULL);
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ReportElaped("GPIO digitalWrite max. frequency ", fExpectMHzdigitalWrite, t1, t2);
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digitalWrite(GPIO, LOW);
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pinMode(GPIO, INPUT);
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ToggleValue /= 10;
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printf("\n\n");
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printf("toggle % 3d million times pin mode...\n", ToggleValue/1000000);
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gettimeofday(&t1, NULL);
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for (int loop=1; loop<ToggleValue; loop++) {
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pinMode(GPIO, OUTPUT);
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pinMode(GPIO, INPUT);
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}
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gettimeofday(&t2, NULL);
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ReportElaped("GPIO pinMode max. frequency ", fExpectMHzpinMode, t1, t2);
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return(EXIT_SUCCESS);
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}
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