lby/mr-library
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1。代码优化。

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MacRsh
2023-12-27 23:47:57 +08:00
parent f4cfebefe1
commit b2c2ff1532
13 changed files with 78 additions and 92 deletions
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18
device/pwm.c
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@@ -67,9 +67,7 @@ static int pwm_calculate(struct mr_pwm *pwm, uint32_t freq)
{
uint32_t clk = pwm->info->clk, psc_max = pwm->info->prescaler_max, per_max = pwm->info->period_max;
uint32_t psc_best = 0, per_best = 0;
uint32_t psc = 0, per = 0;
uint32_t timeout = 0;
int error = 0, error_min = INT32_MAX;
int error_min = INT32_MAX;
/* Check the clock */
if (clk == 0 || freq == 0)
@@ -78,15 +76,15 @@ static int pwm_calculate(struct mr_pwm *pwm, uint32_t freq)
}
/* Calculate the timeout */
timeout = (clk * 1000000) / freq;
uint32_t timeout = (clk * 1000000) / freq;
/* Calculate the Least error period */
for (per = (timeout <= per_max) ? timeout : (timeout / (per_max + 1)); per > 0; per--)
for (uint32_t per = (timeout <= per_max) ? timeout : (timeout / (per_max + 1)); per > 0; per--)
{
psc = timeout / per;
uint32_t psc = timeout / per;
/* Calculate the error */
error = (int)timeout - (int)(psc * per);
int error = (int)timeout - (int)(psc * per);
if (error == 0)
{
psc_best = psc;
@@ -120,7 +118,7 @@ static int pwm_calculate(struct mr_pwm *pwm, uint32_t freq)
break;
}
/* Check if reload can be used as period or prescaler */
/* Check if prescaler can be used as period */
if ((psc_best > per_best) && (psc_best < per_max))
{
mr_swap(per_best, psc_best);
@@ -154,8 +152,7 @@ static int mr_pwm_close(struct mr_dev *dev)
struct mr_pwm_ops *ops = (struct mr_pwm_ops *)dev->drv->ops;
/* Disable all channels */
int i = 0;
for (i = 0; i < 32; i++)
for (int i = 0; i < 32; i++)
{
if (mr_bits_is_set(pwm->channel, (1 << i)) == MR_ENABLE)
{
@@ -318,6 +315,7 @@ int mr_pwm_register(struct mr_pwm *pwm, const char *name, struct mr_drv *drv, st
pwm->channel_polarity = 0;
pwm->info = info;
/* Register the pwm */
return mr_dev_register(&pwm->dev, name, Mr_Dev_Type_PWM, MR_SFLAG_RDWR, &ops, drv);
}