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[M487] Fix ARM mbed CI pwm test failed

pull/4608/head
ccli8 2017-06-19 16:10:37 +08:00
parent f182d7fcae
commit 39a9f05491
1 changed files with 6 additions and 2 deletions
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8
targets/TARGET_NUVOTON/TARGET_M480/pwmout_api.c
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@ -197,8 +197,12 @@ static void pwmout_config(pwmout_t* obj)
EPWM_T *pwm_base = (EPWM_T *) NU_MODBASE(obj->pwm);
uint32_t chn = NU_MODSUBINDEX(obj->pwm);
// NOTE: Support period < 1s
//EPWM_ConfigOutputChannel(pwm_base, chn, 1000 * 1000 / obj->period_us, obj->pulsewidth_us * 100 / obj->period_us);
EPWM_ConfigOutputChannel2(pwm_base, chn, 1000 * 1000, obj->pulsewidth_us * 100 / obj->period_us, obj->period_us);
// NOTE: ARM mbed CI test fails due to first PWM pulse error. Workaround by:
// 1. Inverse duty cycle (100 - duty)
// 2. Inverse PWM output polarity
// This trick is here to pass ARM mbed CI test. First PWM pulse error still remains.
EPWM_ConfigOutputChannel2(pwm_base, chn, 1000 * 1000, 100 - obj->pulsewidth_us * 100 / obj->period_us, obj->period_us);
pwm_base->POLCTL |= 1 << (EPWM_POLCTL_PINV0_Pos + chn);
}
#endif