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rt-thread-official/bsp/essemi/es32vf2264/drivers/drv_pwm.c

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/*
* Copyright (C) 2018 Shanghai Eastsoft Microelectronics Co., Ltd.
*
* SPDX-License-Identifier: Apache-2.0
*
* Licensed under the Apache License, Version 2.0 (the License); you may
* not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an AS IS BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* Change Logs:
* Date Author Notes
* 2019-03-11 wangyq the first version
* 2019-11-01 wangyq update libraries
* 2021-04-20 liuhy the second version
*/
#include <rthw.h>
#include <rtthread.h>
#include <rtdevice.h>
#include <board.h>
#include "es_conf_info_pwm.h"
#ifdef RT_USING_PWM
static void pwm_set_duty(ald_timer_handle_t *timer_initstruct, ald_timer_channel_t ch, uint32_t ns)
{
uint64_t tmp = (uint64_t)ald_cmu_get_pclk_clock() * ns / 1000000000 /
(timer_initstruct->init.prescaler + 1);
if (ch == ALD_TIMER_CHANNEL_1)
WRITE_REG(timer_initstruct->perh->CCVAL1, (uint32_t)tmp);
else if (ch == ALD_TIMER_CHANNEL_2)
WRITE_REG(timer_initstruct->perh->CCVAL2, (uint32_t)tmp);
else if (ch == ALD_TIMER_CHANNEL_3)
WRITE_REG(timer_initstruct->perh->CCVAL3, (uint32_t)tmp);
else if (ch == ALD_TIMER_CHANNEL_4)
WRITE_REG(timer_initstruct->perh->CCVAL4, (uint32_t)tmp);
}
static rt_err_t es32f3_pwm_control(struct rt_device_pwm *device, int cmd, void *arg)
{
rt_err_t ret = RT_EOK;
uint64_t _arr,bus_speed,tmp;
uint32_t _maxcnt,_ccep_ch_en = 0U;
ald_timer_channel_t pwm_channel;
ald_timer_oc_init_t tim_ocinit;
ald_timer_handle_t *timer_initstruct = (ald_timer_handle_t *)device->parent.user_data;
struct rt_pwm_configuration *cfg = (struct rt_pwm_configuration *)arg;
RT_ASSERT(timer_initstruct != RT_NULL);
/* select pwm output channel */
if (1 == cfg->channel)
{
pwm_channel = ALD_TIMER_CHANNEL_1;
_ccep_ch_en = timer_initstruct->perh->CCEP & TIMER_CCEP_CC1EN_MSK;
}
else if (2 == cfg->channel)
{
pwm_channel = ALD_TIMER_CHANNEL_2;
_ccep_ch_en = timer_initstruct->perh->CCEP & TIMER_CCEP_CC2EN_MSK;
}
else if (3 == cfg->channel)
{
pwm_channel = ALD_TIMER_CHANNEL_3;
_ccep_ch_en = timer_initstruct->perh->CCEP & TIMER_CCEP_CC3EN_MSK;
}
else if (4 == cfg->channel)
{
pwm_channel = ALD_TIMER_CHANNEL_4;
_ccep_ch_en = timer_initstruct->perh->CCEP & TIMER_CCEP_CC4EN_MSK;
}
else
return RT_EINVAL;
switch (cmd)
{
case PWM_CMD_ENABLE:
ald_timer_pwm_start(timer_initstruct, pwm_channel);
break;
case PWM_CMD_DISABLE:
ald_timer_pwm_stop(timer_initstruct, pwm_channel);
break;
case PWM_CMD_SET:
/*当通道没开的时候：关通道，设置输出模式和极性，初始化通道*/
if(!_ccep_ch_en)
{
tim_ocinit.oc_mode = ES_PWM_OC_MODE;
tim_ocinit.oc_polarity = ES_PWM_OC_POLARITY;
tim_ocinit.oc_fast_en = DISABLE;
tim_ocinit.ocn_polarity = ALD_TIMER_OCN_POLARITY_HIGH;
tim_ocinit.ocn_idle = ALD_TIMER_OCN_IDLE_RESET;
tim_ocinit.oc_idle = ALD_TIMER_OC_IDLE_RESET;
ald_timer_oc_config_channel(timer_initstruct, &tim_ocinit, pwm_channel);
}
bus_speed = (uint64_t)ald_cmu_get_pclk_clock();
/*判断外设的计数器最大值*/
#ifdef ES32F36xx
if((timer_initstruct->perh == GP32C4T0)||(timer_initstruct->perh == GP32C4T1))
{
_maxcnt = 0xFFFFFFFF;
}
else _maxcnt = 0xFFFF;
#else
_maxcnt = 0xFFFF;
#endif
/*当最大分频 <= _maxcnt时：估计大概的分频，加快速度 */
tmp = bus_speed * (cfg->period)/1000000000/_maxcnt;
timer_initstruct->init.prescaler = (tmp > 2U) ? (tmp - 2U) : 0U ; /*bus_speed < 500000000*/
/* count registers max , auto adjust prescaler */
do
{
_arr = bus_speed * (cfg->period) / 1000000000 /(++timer_initstruct->init.prescaler);
}
while (_arr > _maxcnt);
WRITE_REG(timer_initstruct->perh->AR, (uint32_t)_arr);
timer_initstruct->init.period = (uint32_t)_arr;
/* update prescaler */
WRITE_REG(timer_initstruct->perh->PRES, --timer_initstruct->init.prescaler);
pwm_set_duty(timer_initstruct, pwm_channel, cfg->pulse);
break;
case PWM_CMD_GET:
cfg->pulse = ald_timer_read_capture_value(timer_initstruct, pwm_channel) * 100 /
READ_REG(timer_initstruct->perh->AR);
break;
default:
break;
}
return ret;
}
const static struct rt_pwm_ops es32f3_pwm_ops =
{
es32f3_pwm_control
};
int rt_hw_pwm_init(void)
{
rt_err_t ret = RT_EOK;
ald_gpio_init_t gpio_initstructure;
gpio_initstructure.mode = ALD_GPIO_MODE_OUTPUT;
gpio_initstructure.od = ALD_GPIO_PUSH_PULL;
gpio_initstructure.pupd = ALD_GPIO_PUSH_UP;
gpio_initstructure.odrv = ALD_GPIO_OUT_DRIVE_NORMAL;
gpio_initstructure.flt = ALD_GPIO_FILTER_DISABLE;
gpio_initstructure.type = ALD_GPIO_TYPE_CMOS;
#ifdef BSP_USING_AD16C4T0_PWM /* 4 channels */
static struct rt_device_pwm ad16c4t0_pwm_dev;
static ald_timer_handle_t ad16c4t0_timer_initstruct;
ad16c4t0_timer_initstruct.perh = AD16C4T;
ald_timer_pwm_init(&ad16c4t0_timer_initstruct);
/* gpio initialization */
#if defined(ES_AD16C4T0_CH1_GPIO_FUNC)&&defined(ES_AD16C4T0_CH1_GPIO_PORT)&&defined(ES_AD16C4T0_CH1_GPIO_PIN)
gpio_initstructure.func = ES_AD16C4T0_CH1_GPIO_FUNC;
ald_gpio_init(ES_AD16C4T0_CH1_GPIO_PORT, ES_AD16C4T0_CH1_GPIO_PIN, &gpio_initstructure);
#endif
#if defined(ES_AD16C4T0_CH2_GPIO_FUNC)&&defined(ES_AD16C4T0_CH2_GPIO_PORT)&&defined(ES_AD16C4T0_CH2_GPIO_PIN)
gpio_initstructure.func = ES_AD16C4T0_CH2_GPIO_FUNC;
ald_gpio_init(ES_AD16C4T0_CH2_GPIO_PORT, ES_AD16C4T0_CH2_GPIO_PIN, &gpio_initstructure);
#endif
#if defined(ES_AD16C4T0_CH3_GPIO_FUNC)&&defined(ES_AD16C4T0_CH3_GPIO_PORT)&&defined(ES_AD16C4T0_CH3_GPIO_FUNC)
gpio_initstructure.func = ES_AD16C4T0_CH3_GPIO_FUNC;
ald_gpio_init(ES_AD16C4T0_CH3_GPIO_PORT, ES_AD16C4T0_CH3_GPIO_PIN, &gpio_initstructure);
#endif
#if defined(ES_AD16C4T0_CH4_GPIO_FUNC)&&defined(ES_AD16C4T0_CH4_GPIO_PORT)&&defined(ES_AD16C4T0_CH4_GPIO_PIN)
gpio_initstructure.func = ES_AD16C4T0_CH4_GPIO_FUNC;
ald_gpio_init(ES_AD16C4T0_CH4_GPIO_PORT, ES_AD16C4T0_CH4_GPIO_PIN, &gpio_initstructure);
#endif
ret = rt_device_pwm_register(&ad16c4t0_pwm_dev, ES_DEVICE_NAME_AD16C4T0_PWM, &es32f3_pwm_ops,
&ad16c4t0_timer_initstruct);
#endif
#ifdef BSP_USING_GP16C4T0_PWM /* 4 channels */
static struct rt_device_pwm gp16c4t0_pwm_dev;
static ald_timer_handle_t gp16c4t0_timer_initstruct;
gp16c4t0_timer_initstruct.perh = GP16C4T0;
ald_timer_pwm_init(&gp16c4t0_timer_initstruct);
/* gpio initialization */
#if defined(ES_GP16C4T0_CH1_GPIO_FUNC)&&defined(ES_GP16C4T0_CH1_GPIO_PORT)&&defined(ES_GP16C4T0_CH1_GPIO_PIN)
gpio_initstructure.func = ES_GP16C4T0_CH1_GPIO_FUNC;
ald_gpio_init(ES_GP16C4T0_CH1_GPIO_PORT, ES_GP16C4T0_CH1_GPIO_PIN, &gpio_initstructure);
#endif
#if defined(ES_GP16C4T0_CH2_GPIO_FUNC)&&defined(ES_GP16C4T0_CH2_GPIO_PORT)&&defined(ES_GP16C4T0_CH2_GPIO_PIN)
gpio_initstructure.func = ES_GP16C4T0_CH2_GPIO_FUNC;
ald_gpio_init(ES_GP16C4T0_CH2_GPIO_PORT, ES_GP16C4T0_CH2_GPIO_PIN, &gpio_initstructure);
#endif
#if defined(ES_GP16C4T0_CH3_GPIO_FUNC)&&defined(ES_GP16C4T0_CH3_GPIO_PORT)&&defined(ES_GP16C4T0_CH3_GPIO_PIN)
gpio_initstructure.func = ES_GP16C4T0_CH3_GPIO_FUNC;
ald_gpio_init(ES_GP16C4T0_CH3_GPIO_PORT, ES_GP16C4T0_CH3_GPIO_PIN, &gpio_initstructure);
#endif
#if defined(ES_GP16C4T0_CH4_GPIO_FUNC)&&defined(ES_GP16C4T0_CH4_GPIO_PORT)&&defined(ES_GP16C4T0_CH4_GPIO_PIN)
gpio_initstructure.func = ES_GP16C4T0_CH4_GPIO_FUNC;
ald_gpio_init(ES_GP16C4T0_CH4_GPIO_PORT, ES_GP16C4T0_CH4_GPIO_PIN, &gpio_initstructure);
#endif
ret = rt_device_pwm_register(&gp16c4t0_pwm_dev, ES_DEVICE_NAME_GP16C4T0_PWM, &es32f3_pwm_ops,
&gp16c4t0_timer_initstruct);
#endif
#ifdef BSP_USING_GP16C4T1_PWM /* 4 channels */
static struct rt_device_pwm gp16c4t1_pwm_dev;
static ald_timer_handle_t gp16c4t1_timer_initstruct;
gp16c4t1_timer_initstruct.perh = GP16C4T1;
ald_timer_pwm_init(&gp16c4t1_timer_initstruct);
/* gpio initialization */
#if defined(ES_GP16C4T1_CH1_GPIO_FUNC)&&defined(ES_GP16C4T1_CH1_GPIO_PORT)&&defined(ES_GP16C4T1_CH1_GPIO_PIN)
gpio_initstructure.func = ES_GP16C4T1_CH1_GPIO_FUNC;
ald_gpio_init(ES_GP16C4T1_CH1_GPIO_PORT, ES_GP16C4T1_CH1_GPIO_PIN, &gpio_initstructure);
#endif
#if defined(ES_GP16C4T1_CH2_GPIO_FUNC)&&defined(ES_GP16C4T1_CH2_GPIO_PORT)&&defined(ES_GP16C4T1_CH2_GPIO_PIN)
gpio_initstructure.func = ES_GP16C4T1_CH2_GPIO_FUNC;
ald_gpio_init(ES_GP16C4T1_CH2_GPIO_PORT, ES_GP16C4T1_CH2_GPIO_PIN, &gpio_initstructure);
#endif
#if defined(ES_GP16C4T1_CH3_GPIO_FUNC)&&defined(ES_GP16C4T1_CH3_GPIO_PORT)&&defined(ES_GP16C4T1_CH3_GPIO_PIN)
gpio_initstructure.func = ES_GP16C4T1_CH3_GPIO_FUNC;
ald_gpio_init(ES_GP16C4T1_CH3_GPIO_PORT, ES_GP16C4T1_CH3_GPIO_PIN, &gpio_initstructure);
#endif
#if defined(ES_GP16C4T1_CH4_GPIO_FUNC)&&defined(ES_GP16C4T1_CH4_GPIO_PORT)&&defined(ES_GP16C4T1_CH4_GPIO_PIN)
gpio_initstructure.func = ES_GP16C4T1_CH4_GPIO_FUNC;
ald_gpio_init(ES_GP16C4T1_CH4_GPIO_PORT, ES_GP16C4T1_CH4_GPIO_PIN, &gpio_initstructure);
#endif
ret = rt_device_pwm_register(&gp16c4t1_pwm_dev, ES_DEVICE_NAME_GP16C4T1_PWM, &es32f3_pwm_ops,
&gp16c4t1_timer_initstruct);
#endif
#ifdef BSP_USING_GP16C4T2_PWM /* 4 channels */
static struct rt_device_pwm gp16c4t2_pwm_dev;
static ald_timer_handle_t gp16c4t2_timer_initstruct;
gp16c4t2_timer_initstruct.perh = GP16C4T2;
ald_timer_pwm_init(&gp16c4t2_timer_initstruct);
/* gpio initialization */
#if defined(ES_GP16C4T2_CH1_GPIO_FUNC)&&defined(ES_GP16C4T2_CH1_GPIO_PORT)&&defined(ES_GP16C4T2_CH1_GPIO_PIN)
gpio_initstructure.func = ES_GP16C4T2_CH1_GPIO_FUNC;
ald_gpio_init(ES_GP16C4T2_CH1_GPIO_PORT, ES_GP16C4T2_CH1_GPIO_PIN, &gpio_initstructure);
#endif
#if defined(ES_GP16C4T2_CH2_GPIO_FUNC)&&defined(ES_GP16C4T2_CH2_GPIO_PORT)&&defined(ES_GP16C4T2_CH2_GPIO_PIN)
gpio_initstructure.func = ES_GP16C4T2_CH2_GPIO_FUNC;
ald_gpio_init(ES_GP16C4T2_CH2_GPIO_PORT, ES_GP16C4T2_CH2_GPIO_PIN, &gpio_initstructure);
#endif
#if defined(ES_GP16C4T2_CH3_GPIO_FUNC)&&defined(ES_GP16C4T2_CH3_GPIO_PORT)&&defined(ES_GP16C4T2_CH3_GPIO_PIN)
gpio_initstructure.func = ES_GP16C4T2_CH3_GPIO_FUNC;
ald_gpio_init(ES_GP16C4T2_CH3_GPIO_PORT, ES_GP16C4T2_CH3_GPIO_PIN, &gpio_initstructure);
#endif
#if defined(ES_GP16C4T2_CH4_GPIO_FUNC)&&defined(ES_GP16C4T2_CH4_GPIO_PORT)&&defined(ES_GP16C4T2_CH4_GPIO_PIN)
gpio_initstructure.func = ES_GP16C4T2_CH4_GPIO_FUNC;
ald_gpio_init(ES_GP16C4T2_CH4_GPIO_PORT, ES_GP16C4T2_CH4_GPIO_PIN, &gpio_initstructure);
#endif
ret = rt_device_pwm_register(&gp16c4t2_pwm_dev, ES_DEVICE_NAME_GP16C4T2_PWM, &es32f3_pwm_ops,
&gp16c4t2_timer_initstruct);
#endif
return ret;
}
INIT_DEVICE_EXPORT(rt_hw_pwm_init);
#endif
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