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esp8266/esppwm: Clip negative duty numbers to 0.

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Prior to this patch a negative duty would lead to full PWM.
This commit is contained in:
Olivier Ortigues 2018-02-12 23:43:40 +01:00 committed by Damien George
parent ab7819c314
commit 5c83d05b49
2 changed files with 3 additions and 3 deletions
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4
ports/esp8266/esppwm.c
View File

@ -210,12 +210,12 @@ pwm_start(void)
/******************************************************************************
* FunctionName : pwm_set_duty
* Description : set each channel's duty params
* Parameters : uint8 duty : 0 ~ PWM_DEPTH
* Parameters : int16_t duty : 0 ~ PWM_DEPTH
* uint8 channel : channel index
* Returns : NONE
*******************************************************************************/
void ICACHE_FLASH_ATTR
pwm_set_duty(uint16 duty, uint8 channel)
pwm_set_duty(int16_t duty, uint8 channel)
{
uint8 i;
for(i=0;i<pwm_channel_num;i++){

2
ports/esp8266/esppwm.h
View File

@ -7,7 +7,7 @@
void pwm_init(void);
void pwm_start(void);
void pwm_set_duty(uint16_t duty, uint8_t channel);
void pwm_set_duty(int16_t duty, uint8_t channel);
uint16_t pwm_get_duty(uint8_t channel);
void pwm_set_freq(uint16_t freq, uint8_t channel);
uint16_t pwm_get_freq(uint8_t channel);