You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
65 lines
1.7 KiB
65 lines
1.7 KiB
7 years ago
|
//
|
||
|
|
// Created by MightyPork on 2018/02/03.
|
||
|
|
//
|
||
|
|
|
||
|
|
#include "platform.h"
|
||
|
|
#include "unit_base.h"
|
||
|
|
#include "unit_pwmdim.h"
|
||
|
|
|
||
|
|
#define PWMDIM_INTERNAL
|
||
|
|
#include "_pwmdim_internal.h"
|
||
|
|
|
||
|
|
error_t UPWMDIM_SetFreq(Unit *unit, uint32_t freq)
|
||
|
|
{
|
||
|
|
struct priv *priv = unit->data;
|
||
|
|
|
||
|
|
uint16_t presc;
|
||
|
|
uint32_t count;
|
||
|
|
float real_freq;
|
||
|
|
if (!hw_solve_timer(PLAT_APB1_HZ, freq, true, &presc, &count, &real_freq)) {
|
||
|
|
dbg("Failed to resolve timer params.");
|
||
|
|
return E_BAD_VALUE;
|
||
|
|
}
|
||
|
|
LL_TIM_SetPrescaler(priv->TIMx, (uint32_t) (presc - 1));
|
||
|
|
LL_TIM_SetAutoReload(priv->TIMx, count - 1);
|
||
|
|
|
||
|
|
// we must re-calculate duty cycles because they are absolute related to the ARR which we just changed
|
||
|
|
UPWMDIM_SetDuty(unit, 0, priv->duty1);
|
||
|
|
UPWMDIM_SetDuty(unit, 1, priv->duty2);
|
||
|
|
UPWMDIM_SetDuty(unit, 2, priv->duty3);
|
||
|
|
UPWMDIM_SetDuty(unit, 3, priv->duty4);
|
||
|
|
|
||
|
|
// LL_TIM_GenerateEvent_UPDATE(priv->TIMx); // - this appears to cause jumpiness
|
||
|
|
priv->freq = freq;
|
||
|
|
|
||
|
|
return E_SUCCESS;
|
||
|
|
}
|
||
|
|
|
||
|
|
error_t UPWMDIM_SetDuty(Unit *unit, uint8_t ch, uint16_t duty1000)
|
||
|
|
{
|
||
|
|
struct priv *priv = unit->data;
|
||
|
|
|
||
|
|
uint32_t cnt = (LL_TIM_GetAutoReload(priv->TIMx) + 1)*duty1000 / 1000;
|
||
|
|
|
||
|
|
if (ch == 0) {
|
||
|
|
priv->duty1 = duty1000;
|
||
|
|
LL_TIM_OC_SetCompareCH1(priv->TIMx, cnt);
|
||
|
|
}
|
||
|
|
else if (ch == 1) {
|
||
|
|
priv->duty2 = duty1000;
|
||
|
|
LL_TIM_OC_SetCompareCH2(priv->TIMx, cnt);
|
||
|
|
}
|
||
|
|
else if (ch == 2) {
|
||
|
|
priv->duty3 = duty1000;
|
||
|
|
LL_TIM_OC_SetCompareCH3(priv->TIMx, cnt);
|
||
|
|
}
|
||
|
|
else if (ch == 3) {
|
||
|
|
priv->duty4 = duty1000;
|
||
|
|
LL_TIM_OC_SetCompareCH4(priv->TIMx, cnt);
|
||
|
|
} else {
|
||
|
|
return E_BAD_VALUE;
|
||
|
|
}
|
||
|
|
|
||
|
|
return E_SUCCESS;
|
||
|
|
}
|