Merge pull request #9105 from LaurentLouf/improve-precision-duty-cycle-pwm-stm

Cruz Monrreal · web-flow · commit ff6744c85e5c · 2018-12-17T14:43:43.000-06:00
Add some rounding to determine the pulse value for PWM for the STM target
diff --git a/targets/TARGET_STM/pwmout_api.c b/targets/TARGET_STM/pwmout_api.c
@@ -182,7 +182,7 @@ void pwmout_write(pwmout_t *obj, float value)
         value = 1.0;
     }
 
-    obj->pulse = (uint32_t)((float)obj->period * value);
+    obj->pulse = (uint32_t)((float)obj->period * value + 0.5);
 
     // Configure channels
     sConfig.OCMode       = TIM_OCMODE_PWM1;

Original file line number	Diff line number	Diff line change
`@@ -182,7 +182,7 @@ void pwmout_write(pwmout_t *obj, float value)`
`182`	`182`	`value = 1.0;`
`183`	`183`	`}`
`184`	`184`
`185`		`- obj->pulse = (uint32_t)((float)obj->period * value);`
	`185`	`+ obj->pulse = (uint32_t)((float)obj->period * value + 0.5);`
`186`	`186`
`187`	`187`	`// Configure channels`
`188`	`188`	`sConfig.OCMode = TIM_OCMODE_PWM1;`