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rt-thread/bsp/nuvoton/libraries/m480/rtt_port/drv_tpwm.c

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/**************************************************************************//**
*
* @copyright (C) 2020 Nuvoton Technology Corp. All rights reserved.
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2020-5-5 YCHuang12 First version
*
* Note: 2 channels of a tpwm have the same output.
******************************************************************************/
#include <rtconfig.h>
#if (defined(BSP_USING_TPWM) && defined(RT_USING_PWM))
#define LOG_TAG "drv.tpwm"
#define DBG_ENABLE
#define DBG_SECTION_NAME LOG_TAG
#define DBG_LEVEL DBG_INFO
#define TPWM_CHANNEL_NUM 2
#include <rtdbg.h>
#include <stdint.h>
#include <rtdevice.h>
#include <rthw.h>
#include "NuMicro.h"
/* Private define ---------------------------------------------------------------*/
#define NU_TPWM_DEVICE(tpwm) (nu_tpwm_t *)(tpwm)
/* Private typedef --------------------------------------------------------------*/
typedef struct nu_tpwm
{
struct rt_device_pwm tpwm_dev;
char *name;
TIMER_T *tpwm_base;
rt_uint32_t channel_mask; //TPWM_CH0 | TPWM_CH1
} nu_tpwm_t;
/* Private functions ------------------------------------------------------------*/
static rt_err_t nu_tpwm_enable(struct rt_device_pwm *tpwm_dev, struct rt_pwm_configuration *tpwm_config, rt_bool_t enable);
static rt_err_t nu_tpwm_set(struct rt_device_pwm *tpwm_dev, struct rt_pwm_configuration *tpwm_config);
static rt_err_t nu_tpwm_get(struct rt_device_pwm *tpwm_dev, struct rt_pwm_configuration *tpwm_config);
static rt_err_t nu_tpwm_control(struct rt_device_pwm *tpwm_dev, int cmd, void *arg);
/* Private variables ------------------------------------------------------------*/
#ifdef BSP_USING_TPWM0
static nu_tpwm_t nu_tpwm0;
#endif
#ifdef BSP_USING_TPWM1
static nu_tpwm_t nu_tpwm1;
#endif
#ifdef BSP_USING_TPWM2
static nu_tpwm_t nu_tpwm2;
#endif
#ifdef BSP_USING_TPWM3
static nu_tpwm_t nu_tpwm3;
#endif
static struct rt_pwm_ops nu_tpwm_ops =
{
nu_tpwm_control
};
/* Functions define ------------------------------------------------------------*/
static rt_err_t nu_tpwm_enable(struct rt_device_pwm *tpwm_dev, struct rt_pwm_configuration *tpwm_config, rt_bool_t enable)
{
rt_err_t result = RT_EOK;
rt_uint32_t tpwm_channel = tpwm_config->channel;
nu_tpwm_t *nu_tpwm = NU_TPWM_DEVICE(tpwm_dev->parent.user_data);
if (enable == RT_TRUE)
{
if (nu_tpwm->channel_mask == 0)
{
TPWM_START_COUNTER(nu_tpwm->tpwm_base);
}
nu_tpwm->channel_mask |= (1 << tpwm_channel);
TPWM_ENABLE_OUTPUT(nu_tpwm->tpwm_base, nu_tpwm->channel_mask);
}
else
{
nu_tpwm->channel_mask &= ~(1 << tpwm_channel);
TPWM_ENABLE_OUTPUT(nu_tpwm->tpwm_base, nu_tpwm->channel_mask);
if (nu_tpwm->channel_mask == 0)
{
TPWM_STOP_COUNTER(nu_tpwm->tpwm_base);
}
}
return result;
}
static rt_err_t nu_tpwm_set(struct rt_device_pwm *tpwm_dev, struct rt_pwm_configuration *tpwm_config)
{
if (tpwm_config->period <= 0)
return -(RT_ERROR);
rt_uint32_t tpwm_freq, tpwm_dutycycle ;
rt_uint32_t tpwm_period = tpwm_config->period;
rt_uint32_t tpwm_pulse = tpwm_config->pulse;
nu_tpwm_t *nu_tpwm = NU_TPWM_DEVICE(tpwm_dev->parent.user_data);
rt_uint32_t pre_tpwm_prescaler = TPWM_GET_PRESCALER(nu_tpwm->tpwm_base);
tpwm_freq = 1000000000 / tpwm_period;
tpwm_dutycycle = (tpwm_pulse * 100) / tpwm_period;
TPWM_ConfigOutputFreqAndDuty(nu_tpwm->tpwm_base, tpwm_freq, tpwm_dutycycle) ;
return RT_EOK;
}
static rt_err_t nu_tpwm_get(struct rt_device_pwm *tpwm_dev, struct rt_pwm_configuration *tpwm_config)
{
rt_uint32_t tpwm_real_period, tpwm_real_duty, time_tick, u32TPWMClockFreq ;
nu_tpwm_t *nu_tpwm = NU_TPWM_DEVICE(tpwm_dev->parent.user_data);
rt_uint32_t tpwm_prescale = TPWM_GET_PRESCALER(nu_tpwm->tpwm_base);
rt_uint32_t tpwm_period = TPWM_GET_PERIOD(nu_tpwm->tpwm_base);
rt_uint32_t tpwm_pulse = TPWM_GET_CMPDAT(nu_tpwm->tpwm_base);
u32TPWMClockFreq = TIMER_GetModuleClock(nu_tpwm->tpwm_base);
time_tick = 1000000000000 / u32TPWMClockFreq;
tpwm_real_period = (((tpwm_prescale + 1) * (tpwm_period + 1)) * time_tick) / 1000;
tpwm_real_duty = (((tpwm_prescale + 1) * tpwm_pulse * time_tick)) / 1000;
tpwm_config->period = tpwm_real_period;
tpwm_config->pulse = tpwm_real_duty;
LOG_I("%s %d %d %d\n", nu_tpwm->name, tpwm_config->channel, tpwm_config->period, tpwm_config->pulse);
return RT_EOK;
}
static rt_err_t nu_tpwm_control(struct rt_device_pwm *tpwm_dev, int cmd, void *arg)
{
struct rt_pwm_configuration *tpwm_config = (struct rt_pwm_configuration *)arg;
RT_ASSERT(tpwm_dev != RT_NULL);
RT_ASSERT(tpwm_config != RT_NULL);
nu_tpwm_t *nu_tpwm = NU_TPWM_DEVICE(tpwm_dev->parent.user_data);
RT_ASSERT(nu_tpwm != RT_NULL);
RT_ASSERT(nu_tpwm->tpwm_base != RT_NULL);
if ((tpwm_config->channel + 1) > TPWM_CHANNEL_NUM)
return -(RT_ERROR);
switch (cmd)
{
case PWM_CMD_ENABLE:
return nu_tpwm_enable(tpwm_dev, tpwm_config, RT_TRUE);
case PWM_CMD_DISABLE:
return nu_tpwm_enable(tpwm_dev, tpwm_config, RT_FALSE);
case PWM_CMD_SET:
return nu_tpwm_set(tpwm_dev, tpwm_config);
case PWM_CMD_GET:
return nu_tpwm_get(tpwm_dev, tpwm_config);
default:
break;
}
return -(RT_EINVAL);
}
int rt_hw_tpwm_init(void)
{
rt_err_t ret = RT_EOK;
#ifdef BSP_USING_TPWM0
nu_tpwm0.tpwm_base = TIMER0;
nu_tpwm0.name = "tpwm0";
nu_tpwm0.channel_mask = 0;
ret = rt_device_pwm_register(&nu_tpwm0.tpwm_dev, nu_tpwm0.name, &nu_tpwm_ops, &nu_tpwm0);
if (ret != RT_EOK)
{
rt_kprintf("tpwm0 register failed\n");
}
SYS_ResetModule(TMR0_RST);
CLK_EnableModuleClock(TMR0_MODULE);
TPWM_ENABLE_PWM_MODE(TIMER0);
#endif
#ifdef BSP_USING_TPWM1
nu_tpwm1.tpwm_base = TIMER1;
nu_tpwm1.name = "tpwm1";
nu_tpwm1.channel_mask = 0;
ret = rt_device_pwm_register(&nu_tpwm1.tpwm_dev, nu_tpwm1.name, &nu_tpwm_ops, &nu_tpwm1);
if (ret != RT_EOK)
{
rt_kprintf("tpwm1 register failed\n");
}
SYS_ResetModule(TMR1_RST);
CLK_EnableModuleClock(TMR1_MODULE);
TPWM_ENABLE_PWM_MODE(TIMER1);
#endif
#ifdef BSP_USING_TPWM2
nu_tpwm2.tpwm_base = TIMER2;
nu_tpwm2.name = "tpwm2";
nu_tpwm2.channel_mask = 0;
ret = rt_device_pwm_register(&nu_tpwm2.tpwm_dev, nu_tpwm2.name, &nu_tpwm_ops, &nu_tpwm2);
if (ret != RT_EOK)
{
rt_kprintf("tpwm2 register failed\n");
}
SYS_ResetModule(TMR2_RST);
CLK_EnableModuleClock(TMR2_MODULE);
TPWM_ENABLE_PWM_MODE(TIMER2);
#endif
#ifdef BSP_USING_TPWM3
nu_tpwm3.tpwm_base = TIMER3;
nu_tpwm3.name = "tpwm3";
nu_tpwm3.channel_mask = 0;
ret = rt_device_pwm_register(&nu_tpwm3.tpwm_dev, nu_tpwm3.name, &nu_tpwm_ops, &nu_tpwm3);
if (ret != RT_EOK)
{
rt_kprintf("tpwm3 register failed\n");
}
SYS_ResetModule(TMR3_RST);
CLK_EnableModuleClock(TMR3_MODULE);
TPWM_ENABLE_PWM_MODE(TIMER3);
#endif
return ret;
}
INIT_DEVICE_EXPORT(rt_hw_tpwm_init);
#endif //#if (defined(BSP_USING_TPWM) && defined(RT_USING_PWM))
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