pwm.c

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#include "rl.h"
#include "sysfs.h"
 
#include "pwm.h"
 
int pwm_init(void) {
    sysfs_export_unexported((EPWM0A_SYSFS_PATH), (PWMSS0_SYSFS_PATH "export"),
                            EPWM0A_SYSFS_INDEX);
    sysfs_export_unexported((EPWM1A_SYSFS_PATH), (PWMSS1_SYSFS_PATH "export"),
                            EPWM1A_SYSFS_INDEX);
    sysfs_export_unexported((EPWM1B_SYSFS_PATH), (PWMSS1_SYSFS_PATH "export"),
                            EPWM1B_SYSFS_INDEX);
 
    sysfs_write_int((EPWM0A_SYSFS_PATH "period"), PWM_PERIOD_DEFAULT);
    sysfs_write_int((EPWM1A_SYSFS_PATH "period"), PWM_PERIOD_DEFAULT);
    sysfs_write_int((EPWM1B_SYSFS_PATH "period"), PWM_PERIOD_DEFAULT);
 
    sysfs_write_int((EPWM0A_SYSFS_PATH "duty_cycle"), PWM_DUTY_CYCLE_DEFAULT);
    sysfs_write_int((EPWM1A_SYSFS_PATH "duty_cycle"), PWM_DUTY_CYCLE_DEFAULT);
    sysfs_write_int((EPWM1B_SYSFS_PATH "duty_cycle"), PWM_DUTY_CYCLE_DEFAULT);
 
    sysfs_write_int((EPWM0A_SYSFS_PATH "enable"), 1);
    sysfs_write_int((EPWM1A_SYSFS_PATH "enable"), 1);
    sysfs_write_int((EPWM1B_SYSFS_PATH "enable"), 1);
 
    return SUCCESS;
}
 
void pwm_deinit(void) {
    sysfs_write_int((EPWM0A_SYSFS_PATH "enable"), 0);
    sysfs_write_int((EPWM1A_SYSFS_PATH "enable"), 0);
    sysfs_write_int((EPWM1B_SYSFS_PATH "enable"), 0);
 
    sysfs_unexport((PWMSS0_SYSFS_PATH "unexport"), EPWM0A_SYSFS_INDEX);
    sysfs_unexport((PWMSS1_SYSFS_PATH "unexport"), EPWM1A_SYSFS_INDEX);
    sysfs_unexport((PWMSS1_SYSFS_PATH "unexport"), EPWM1B_SYSFS_INDEX);
}