mraa_pwm_context setupPWMO( int pinNumber ) {
on = 0;
mraa_pwm_context pwmo = mraa_pwm_init( pinNumber );
if ( ! pwmo ) {
printf( " Failed initing pwmo\n" );
mraa_result_print( MRAA_ERROR_UNSPECIFIED );
return 0;
}
response = mraa_pwm_enable( pwmo, 0 ); // Initially off
if (response != MRAA_SUCCESS) {
// printf( " Failed setting pwmo enable to off during setup\n" );
mraa_result_print((mraa_result_t) response);
return 0;
}
response = mraa_pwm_config_percent( pwmo, 100, 0.25 ); // Startup settings, 0.1 second, 50% duty cycle
if (response != MRAA_SUCCESS) {
// printf( " Failed setting pwmo period and duty cycle\n" );
mraa_result_print((mraa_result_t) response);
return 0;
}
response = mraa_pwm_enable( pwmo, 1 ); // Now enable it
if (response != MRAA_SUCCESS) {
// printf( " Failed setting pwmo enable to on during setup\n" );
mraa_result_print((mraa_result_t) response);
return 0;
}
// printf( " Inited pwmo for pin %d\n", pinNumber );
return pwmo;
}
/**
* Set the period and duty (percent) of a PWM object.
*
* @param period as represented in ms.
* @param duty percentage i.e. 50% = 0.5f
* @return Result of operation
*/
mraa_result_t
config_percent(int period, float duty)
{
return mraa_pwm_config_percent(m_pwm, period, duty);
}