68 lines
1.5 KiB
C
68 lines
1.5 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <unistd.h>
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#include <stdint.h>
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#include <stdbool.h>
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#include <libsoc_pwm.h>
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/*
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* libsoc PWM API Documentation: https://jackmitch.github.io/libsoc/c/pwm/
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*/
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int main(void)
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{
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pwm* vf_pwm = NULL;
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uint32_t ret = EXIT_SUCCESS;
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uint32_t pwm_period = 0;
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uint32_t pwm_number = 0;
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uint32_t pwm_chip_number = 0;
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uint32_t pwm_duty_cycle = 0;
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printf("Enter PWM chip number:\t");
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scanf("%d", &pwm_chip_number);
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printf("Enter PWM number:\t");
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scanf("%d", &pwm_number);
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vf_pwm = libsoc_pwm_request(pwm_chip_number, pwm_number, LS_WEAK);
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if (vf_pwm == NULL) {
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perror("PWM request failed");
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return EXIT_FAILURE;
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}
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printf("Enter PWM Period:\t");
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scanf("%d", &pwm_period);
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ret = libsoc_pwm_set_period(vf_pwm, pwm_period);
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if (ret == EXIT_FAILURE) {
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perror("PWM set period failed");
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goto exit_failure;
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}
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printf("Enter PWM Duty Cycle:\t");
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scanf("%d", &pwm_duty_cycle);
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ret = libsoc_pwm_set_duty_cycle(vf_pwm, pwm_duty_cycle);
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if (ret == EXIT_FAILURE) {
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perror("PWM set duty cycle failed");
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goto exit_failure;
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}
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ret = libsoc_pwm_set_enabled(vf_pwm, ENABLED);
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if (ret == EXIT_FAILURE) {
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perror("PWM enable failed");
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goto exit_failure;
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}
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printf("PWM will be running for 10 seconds\n");
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sleep(10);
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printf("Disabling PWM\n");
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ret = libsoc_pwm_set_enabled(vf_pwm, DISABLED);
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if (ret == EXIT_FAILURE)
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perror("PWM disable failed");
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exit_failure:
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libsoc_pwm_free(vf_pwm);
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return ret;
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}
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