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nrf5/hal/pwm: Updating PWM implementation to support manually set duty cycle period. Pulse width has precidence over duty cycle percentage. Also adding support for the two configurable modes, high to low, and low to high, duty cycles.

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This commit is contained in:
Glenn Ruben Bakke 2017-04-18 20:56:19 +02:00
parent 4d56f2a76d
commit d0d350da16
1 changed files with 13 additions and 3 deletions
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16
nrf5/hal/hal_pwm.c
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@ -50,10 +50,20 @@ static const uint32_t hal_pwm_frequency_lookup[] = {
void hal_pwm_init(NRF_PWM_Type * p_instance, hal_pwm_init_t const * p_pwm_init) {
g_pwm_period = p_pwm_init->period;
uint16_t duty_cycle = ((g_pwm_period * p_pwm_init->duty)/100);
uint16_t pulse_width = ((g_pwm_period * p_pwm_init->duty)/100);
if (p_pwm_init->pulse_width > 0) {
pulse_width = p_pwm_init->pulse_width;
}
if (p_pwm_init->mode == HAL_PWM_MODE_HIGH_LOW) {
g_pwm_seq[0] = g_pwm_period - pulse_width;
g_pwm_seq[1] = g_pwm_period - pulse_width;
} else {
g_pwm_seq[0] = pulse_width;
g_pwm_seq[1] = pulse_width;
}
g_pwm_seq[0] = duty_cycle;
g_pwm_seq[1] = duty_cycle;
g_pwm_seq[2] = 0;
g_pwm_seq[3] = 0;