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rt-thread-official/bsp/imxrt/libraries/drivers/drv_pwm.c

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/*
* Copyright (c) 2006-2018, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2019-04-28 tyustli first version
*
*/
#include <rtthread.h>
#ifdef BSP_USING_PWM
#if !defined(BSP_USING_PWM1_CH0) && !defined(BSP_USING_PWM1_CH1) && !defined(BSP_USING_PWM1_CH2) && !defined(BSP_USING_PWM1_CH3) && \
!defined(BSP_USING_PWM2_CH0) && !defined(BSP_USING_PWM2_CH1) && !defined(BSP_USING_PWM2_CH2) && !defined(BSP_USING_PWM2_CH3) && \
!defined(BSP_USING_PWM3_CH0) && !defined(BSP_USING_PWM3_CH1) && !defined(BSP_USING_PWM3_CH2) && !defined(BSP_USING_PWM3_CH3) && \
!defined(BSP_USING_PWM4_CH0) && !defined(BSP_USING_PWM4_CH1) && !defined(BSP_USING_PWM4_CH2) && !defined(BSP_USING_PWM4_CH3)
#error "Please define at least one BSP_USING_PWMx_CHx"
#endif
#define LOG_TAG "drv.pwm"
#include <drv_log.h>
#include <rtdevice.h>
#include "fsl_pwm.h"
#include "drv_pwm.h"
#define DEFAULT_PRE 5
#define DEFAULT_DUTY 50
#define DEFAULT_FRE 1000
#define PWM_SRC_CLK_FREQ CLOCK_GetFreq(kCLOCK_IpgClk)
#define DEFAULT_COMPLEMENTARY_PAIR kPWM_PwmA
#define DEFAULT_POLARITY kPWM_HighTrue
static pwm_signal_param_t Pwm_Signal;
static rt_err_t imxrt_drv_pwm_control(struct rt_device_pwm *device, int cmd, void *arg);
static struct rt_pwm_ops imxrt_drv_ops =
{
.control = imxrt_drv_pwm_control
};
static rt_err_t imxrt_drv_pwm_enable(struct rt_device_pwm *device, struct rt_pwm_configuration *configuration, rt_bool_t enable)
{
PWM_Type *base;
pwm_module_control_t pwm_module_control;
base = (PWM_Type *)device->parent.user_data;
pwm_module_control = (pwm_module_control_t)(1 << configuration->channel);
if (!enable)
{
PWM_StopTimer(base, pwm_module_control);
}
else
{
PWM_StartTimer(base, pwm_module_control);
}
return RT_EOK;
}
static rt_err_t imxrt_drv_pwm_get(struct rt_device_pwm *device, struct rt_pwm_configuration *configuration)
{
uint8_t get_duty;
uint16_t pulseCnt = 0, pwmHighPulse = 0;
uint32_t get_frequence;
uint32_t pwmClock;
PWM_Type *base;
pwm_submodule_t pwm_submodule;
base = (PWM_Type *)device->parent.user_data;
pwm_submodule = (pwm_submodule_t)configuration->channel;
/* get frequence */
get_frequence = base->SM[pwm_submodule].VAL1;
pwmClock = (PWM_SRC_CLK_FREQ / (1U << ((base->SM[pwm_submodule].CTRL & PWM_CTRL_PRSC_MASK) >> PWM_CTRL_PRSC_SHIFT)));
get_frequence = pwmClock / get_frequence;
/* get dutycycle */
pulseCnt = base->SM[pwm_submodule].VAL1;
pwmHighPulse = pulseCnt - (base->SM[pwm_submodule].VAL2) * 2;
get_duty = pwmHighPulse * 100 / pulseCnt;
/* conversion */
configuration->period = 1000000000 / get_frequence;
configuration->pulse = get_duty * configuration->period / 100;
return RT_EOK;
}
static rt_err_t imxrt_drv_pwm_set(struct rt_device_pwm *device, struct rt_pwm_configuration *configuration)
{
RT_ASSERT(configuration->period > 0);
RT_ASSERT(configuration->pulse <= configuration->period);
PWM_Type *base;
pwm_submodule_t pwm_submodule;
pwm_module_control_t pwm_module_control;
uint32_t period = 0;
uint8_t duty = 0;
base = (PWM_Type *)device->parent.user_data;
pwm_submodule = (pwm_submodule_t)configuration->channel;
pwm_module_control = (pwm_module_control_t)(1 << configuration->channel);
duty = configuration->pulse * 100 / configuration->period;
Pwm_Signal.dutyCyclePercent = duty;
period = (uint32_t)(1000000000 / configuration->period);
PWM_SetupPwm(base, pwm_submodule, &Pwm_Signal, 1, kPWM_CenterAligned, period, PWM_SRC_CLK_FREQ);
PWM_UpdatePwmDutycycle(base, pwm_submodule, DEFAULT_COMPLEMENTARY_PAIR, kPWM_CenterAligned, duty);
PWM_SetPwmLdok(base, pwm_module_control, true);
return RT_EOK;
}
static rt_err_t imxrt_drv_pwm_control(struct rt_device_pwm *device, int cmd, void *arg)
{
struct rt_pwm_configuration *configuration = (struct rt_pwm_configuration *)arg;
switch (cmd)
{
case PWM_CMD_ENABLE:
return imxrt_drv_pwm_enable(device, configuration, RT_TRUE);
case PWM_CMD_DISABLE:
return imxrt_drv_pwm_enable(device, configuration, RT_FALSE);
case PWM_CMD_SET:
return imxrt_drv_pwm_set(device, configuration);
case PWM_CMD_GET:
return imxrt_drv_pwm_get(device, configuration);
default:
return RT_EINVAL;
}
}
static rt_err_t imxrt_drv_pwm_init(PWM_Type *base, pwm_submodule_t pwm_submodule, uint16_t psc, uint32_t fre, uint8_t duty)
{
pwm_config_t PwmConfig;
uint8_t fault_input;
pwm_clock_prescale_t pwm_prescale = (pwm_clock_prescale_t)psc;
fault_input = (uint8_t)pwm_submodule;
PWM_GetDefaultConfig(&PwmConfig);
PwmConfig.prescale = pwm_prescale;
PwmConfig.reloadLogic = kPWM_ReloadPwmFullCycle;
PwmConfig.pairOperation = kPWM_Independent;
PwmConfig.enableDebugMode = true;
if (PWM_Init(base, pwm_submodule, &PwmConfig) == kStatus_Fail)
{
LOG_E("init pwm failed \n");
return RT_ERROR;
}
base->SM[fault_input].DISMAP[0] = 0x00;
base->SM[fault_input].DISMAP[1] = 0x00;
Pwm_Signal.pwmChannel = DEFAULT_COMPLEMENTARY_PAIR;
Pwm_Signal.level = DEFAULT_POLARITY;
Pwm_Signal.dutyCyclePercent = duty;
PWM_SetupPwm(base, pwm_submodule, &Pwm_Signal, 1, kPWM_CenterAligned, fre, PWM_SRC_CLK_FREQ);
PWM_SetPwmLdok(base, pwm_submodule, true);
return RT_EOK;
}
#ifdef BSP_USING_PWM1
static rt_err_t imxrt_pwm1_init(PWM_Type *base)
{
#ifdef BSP_USING_PWM1_CH0
if (imxrt_drv_pwm_init(base, kPWM_Module_0, DEFAULT_PRE, DEFAULT_FRE, DEFAULT_DUTY) != RT_EOK)
{
return RT_ERROR;
}
#endif /* BSP_USING_PWM1_CH0 */
#ifdef BSP_USING_PWM1_CH1
if (imxrt_drv_pwm_init(base, kPWM_Module_1, DEFAULT_PRE, DEFAULT_FRE, DEFAULT_DUTY) != RT_EOK)
{
return RT_ERROR;
}
#endif /* BSP_USING_PWM1_CH1 */
#ifdef BSP_USING_PWM1_CH2
if (imxrt_drv_pwm_init(base, kPWM_Module_2, DEFAULT_PRE, DEFAULT_FRE, DEFAULT_DUTY) != RT_EOK)
{
return RT_ERROR;
}
#endif /*BSP_USING_PWM1_CH2 */
#ifdef BSP_USING_PWM1_CH3
if (imxrt_drv_pwm_init(base, kPWM_Module_3, DEFAULT_PRE, DEFAULT_FRE, DEFAULT_DUTY) != RT_EOK)
{
return RT_ERROR;
}
#endif /* BSP_USING_PWM1_CH3 */
return RT_EOK;
}
#endif /* BSP_USING_PWM1 */
#ifdef BSP_USING_PWM2
static rt_err_t imxrt_pwm2_init(PWM_Type *base)
{
#ifdef BSP_USING_PWM2_CH0
if (imxrt_drv_pwm_init(base, kPWM_Module_0, DEFAULT_PRE, DEFAULT_FRE, DEFAULT_DUTY) != RT_EOK)
{
return RT_ERROR;
}
#endif /* BSP_USING_PWM2_CH0 */
#ifdef BSP_USING_PWM2_CH1
if (imxrt_drv_pwm_init(base, kPWM_Module_1, DEFAULT_PRE, DEFAULT_FRE, DEFAULT_DUTY) != RT_EOK)
{
return RT_ERROR;
}
#endif /* BSP_USING_PWM2_CH1 */
#ifdef BSP_USING_PWM2_CH2
if (imxrt_drv_pwm_init(base, kPWM_Module_2, DEFAULT_PRE, DEFAULT_FRE, DEFAULT_DUTY) != RT_EOK)
{
return RT_ERROR;
}
#endif /*BSP_USING_PWM2_CH2 */
#ifdef BSP_USING_PWM2_CH3
if (imxrt_drv_pwm_init(base, kPWM_Module_3, DEFAULT_PRE, DEFAULT_FRE, DEFAULT_DUTY) != RT_EOK)
{
return RT_ERROR;
}
#endif /* BSP_USING_PWM2_CH3 */
return RT_EOK;
}
#endif /* BSP_USING_PWM2 */
#ifdef BSP_USING_PWM3
static rt_err_t imxrt_pwm3_init(PWM_Type *base)
{
#ifdef BSP_USING_PWM3_CH0
if (imxrt_drv_pwm_init(base, kPWM_Module_0, DEFAULT_PRE, DEFAULT_FRE, DEFAULT_DUTY) != RT_EOK)
{
return RT_ERROR;
}
#endif /* BSP_USING_PWM3_CH0 */
#ifdef BSP_USING_PWM3_CH1
if (imxrt_drv_pwm_init(base, kPWM_Module_1, DEFAULT_PRE, DEFAULT_FRE, DEFAULT_DUTY) != RT_EOK)
{
return RT_ERROR;
}
#endif /* BSP_USING_PWM3_CH1 */
#ifdef BSP_USING_PWM3_CH2
if (imxrt_drv_pwm_init(base, kPWM_Module_2, DEFAULT_PRE, DEFAULT_FRE, DEFAULT_DUTY) != RT_EOK)
{
return RT_ERROR;
}
#endif /*BSP_USING_PWM3_CH2 */
#ifdef BSP_USING_PWM3_CH3
if (imxrt_drv_pwm_init(base, kPWM_Module_3, DEFAULT_PRE, DEFAULT_FRE, DEFAULT_DUTY) != RT_EOK)
{
return RT_ERROR;
}
#endif /* BSP_USING_PWM3_CH3 */
return RT_EOK;
}
#endif /* BSP_USING_PWM3 */
#ifdef BSP_USING_PWM4
static rt_err_t imxrt_pwm4_init(PWM_Type *base)
{
#ifdef BSP_USING_PWM4_CH0
if (imxrt_drv_pwm_init(base, kPWM_Module_0, DEFAULT_PRE, DEFAULT_FRE, DEFAULT_DUTY) != RT_EOK)
{
return RT_ERROR;
}
#endif /* BSP_USING_PWM4_CH0 */
#ifdef BSP_USING_PWM4_CH1
if (imxrt_drv_pwm_init(base, kPWM_Module_1, DEFAULT_PRE, DEFAULT_FRE, DEFAULT_DUTY) != RT_EOK)
{
return RT_ERROR;
}
#endif /* BSP_USING_PWM4_CH1 */
#ifdef BSP_USING_PWM4_CH2
if (imxrt_drv_pwm_init(base, kPWM_Module_2, DEFAULT_PRE, DEFAULT_FRE, DEFAULT_DUTY) != RT_EOK)
{
return RT_ERROR;
}
#endif /*BSP_USING_PWM4_CH2 */
#ifdef BSP_USING_PWM4_CH3
if (imxrt_drv_pwm_init(base, kPWM_Module_3, DEFAULT_PRE, DEFAULT_FRE, DEFAULT_DUTY) != RT_EOK)
{
return RT_ERROR;
}
#endif /* BSP_USING_PWM4_CH3 */
return RT_EOK;
}
#endif /* BSP_USING_PWM4 */
int rt_hw_pwm_init(void)
{
rt_err_t ret = RT_EOK;
#ifdef BSP_USING_PWM1
static struct rt_device_pwm pwm1_device;
if (imxrt_pwm1_init(PWM1) != RT_EOK)
{
LOG_E("init pwm1 failed\n");
}
ret = rt_device_pwm_register(&pwm1_device, "pwm1", &imxrt_drv_ops, PWM1);
if (ret != RT_EOK)
{
LOG_E("%s register failed", "pwm1");
}
#endif /* BSP_USING_PWM1 */
#ifdef BSP_USING_PWM2
static struct rt_device_pwm pwm2_device;
if (imxrt_pwm2_init(PWM2) != RT_EOK)
{
LOG_E("init pwm2 failed\n");
}
ret = rt_device_pwm_register(&pwm2_device, "pwm2", &imxrt_drv_ops, PWM2);
if (ret != RT_EOK)
{
LOG_E("%s register failed", "pwm2");
}
#endif /* BSP_USING_PWM2 */
#ifdef BSP_USING_PWM3
static struct rt_device_pwm pwm3_device;
if (imxrt_pwm3_init(PWM3) != RT_EOK)
{
LOG_E("init pwm3 failed\n");
}
ret = rt_device_pwm_register(&pwm3_device, "pwm3", &imxrt_drv_ops, PWM3);
if (ret != RT_EOK)
{
LOG_E("%s register failed", "pwm3");
}
#endif /* BSP_USING_PWM3 */
#ifdef BSP_USING_PWM4
static struct rt_device_pwm pwm4_device;
if (imxrt_pwm4_init(PWM4) != RT_EOK)
{
LOG_E("init pwm4 failed\n");
}
ret = rt_device_pwm_register(&pwm4_device, "pwm4", &imxrt_drv_ops, PWM4);
if (ret != RT_EOK)
{
LOG_E("%s register failed", "pwm4");
}
#endif /* BSP_USING_PWM4 */
return ret;
}
INIT_DEVICE_EXPORT(rt_hw_pwm_init);
#endif /* BSP_USING_PWM */
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