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

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2019-06-12 15:01:12 +08:00
/*
* 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) && \
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!defined(BSP_USING_PWM4_CH0) && !defined(BSP_USING_PWM4_CH1) && !defined(BSP_USING_PWM4_CH2) && !defined(BSP_USING_PWM4_CH3) && \
!defined(BSP_USING_QTMR1_CH0) && !defined(BSP_USING_QTMR1_CH1) && !defined(BSP_USING_QTMR1_CH2) && !defined(BSP_USING_QTMR1_CH3) && \
!defined(BSP_USING_QTMR2_CH0) && !defined(BSP_USING_QTMR2_CH1) && !defined(BSP_USING_QTMR2_CH2) && !defined(BSP_USING_QTMR2_CH3) && \
!defined(BSP_USING_QTMR3_CH0) && !defined(BSP_USING_QTMR3_CH1) && !defined(BSP_USING_QTMR3_CH2) && !defined(BSP_USING_QTMR3_CH3) && \
!defined(BSP_USING_QTMR4_CH0) && !defined(BSP_USING_QTMR4_CH1) && !defined(BSP_USING_QTMR4_CH2) && !defined(BSP_USING_QTMR4_CH3)
#error "Please define at least one BSP_USING_PWMx_CHx or BSP_USING_QTMRx_CHx"
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#endif
#define LOG_TAG "drv.pwm"
#include <drv_log.h>
#include <rtdevice.h>
#include "fsl_pwm.h"
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#if defined(FSL_FEATURE_SOC_TMR_COUNT) && FSL_FEATURE_SOC_TMR_COUNT > 0
#include "fsl_qtmr.h"
#endif
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#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");
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return -RT_ERROR;
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}
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)
{
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return -RT_ERROR;
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}
#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)
{
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return -RT_ERROR;
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}
#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)
{
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return -RT_ERROR;
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}
#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)
{
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return -RT_ERROR;
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}
#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)
{
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return -RT_ERROR;
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}
#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)
{
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return -RT_ERROR;
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}
#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)
{
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return -RT_ERROR;
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}
#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)
{
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return -RT_ERROR;
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}
#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)
{
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return -RT_ERROR;
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}
#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)
{
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return -RT_ERROR;
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}
#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)
{
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return -RT_ERROR;
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}
#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)
{
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return -RT_ERROR;
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}
#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)
{
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return -RT_ERROR;
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}
#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)
{
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return -RT_ERROR;
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}
#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)
{
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return -RT_ERROR;
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}
#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)
{
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return -RT_ERROR;
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}
#endif /* BSP_USING_PWM4_CH3 */
return RT_EOK;
}
#endif /* BSP_USING_PWM4 */
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static rt_err_t imxrt_drv_qtmr_control(struct rt_device_pwm *device, int cmd, void *arg);
static struct rt_pwm_ops imxrt_drv_qtmr_ops =
{
.control = imxrt_drv_qtmr_control
};
static rt_err_t imxrt_drv_qtmr_enable(struct rt_device_pwm *device, struct rt_pwm_configuration *configuration, rt_bool_t enable)
{
TMR_Type *base;
base = (TMR_Type *)device->parent.user_data;
if (!enable)
{
QTMR_StopTimer(base, configuration->channel);
base->CHANNEL[configuration->channel].SCTRL |= (TMR_SCTRL_FORCE_MASK | TMR_SCTRL_OEN_MASK);
}
else
{
QTMR_StartTimer(base, configuration->channel, kQTMR_PriSrcRiseEdge);
}
return RT_EOK;
}
static rt_err_t imxrt_drv_qtmr_get(struct rt_device_pwm *device, struct rt_pwm_configuration *configuration)
{
TMR_Type *base;
rt_uint32_t high_count, low_count, clk_divider, clk_freq;
base = (TMR_Type *)device->parent.user_data;
low_count = base->CHANNEL[configuration->channel].COMP1;
high_count = base->CHANNEL[configuration->channel].COMP2;
clk_divider = 1 << (((base->CHANNEL[configuration->channel].CTRL & TMR_CTRL_PCS_MASK) >> TMR_CTRL_PCS_SHIFT) - 8);
clk_freq = CLOCK_GetFreq(kCLOCK_IpgClk) / clk_divider;
configuration->period = 1000000000 / clk_freq * (high_count + low_count);
configuration->pulse = 1000000000 / clk_freq * high_count;
return RT_EOK;
}
static rt_err_t imxrt_drv_qtmr_set(struct rt_device_pwm *device, struct rt_pwm_configuration *configuration)
{
RT_ASSERT(configuration->period > 0);
RT_ASSERT(configuration->pulse <= configuration->period);
TMR_Type *base = (TMR_Type *)device->parent.user_data;
rt_size_t clk_freq = CLOCK_GetFreq(kCLOCK_IpgClk) / (1 << (((base->CHANNEL[configuration->channel].CTRL & TMR_CTRL_PCS_MASK) >> TMR_CTRL_PCS_SHIFT) - 8));
rt_size_t current_period_count = base->CHANNEL[configuration->channel].CMPLD1 + base->CHANNEL[configuration->channel].CMPLD2;
rt_size_t period_count = clk_freq / (1000000000 / configuration->period);
if (current_period_count == period_count)
{
rt_size_t high_count = period_count * configuration->pulse / configuration->period;
rt_size_t low_count = period_count - high_count;
base->CHANNEL[configuration->channel].CMPLD1 = (uint16_t)low_count;
base->CHANNEL[configuration->channel].CMPLD2 = (uint16_t)high_count;
}
else
{
rt_bool_t timer_is_on = base->CHANNEL[configuration->channel].CTRL & TMR_CTRL_CM_MASK;
rt_uint8_t duty = configuration->pulse * 100 / configuration->period;
QTMR_StopTimer(base, configuration->channel);
if (kStatus_Success != QTMR_SetupPwm(base, configuration->channel, 1000000000 / configuration->period, duty, DEFAULT_POLARITY, clk_freq))
{
LOG_E(LOG_TAG" setup pwm failed \n");
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return -RT_ERROR;
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}
if (timer_is_on)
{
QTMR_StartTimer(base, configuration->channel, kQTMR_PriSrcRiseEdge);
}
}
return RT_EOK;
}
static rt_err_t imxrt_drv_qtmr_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_qtmr_enable(device, configuration, RT_TRUE);
case PWM_CMD_DISABLE:
return imxrt_drv_qtmr_enable(device, configuration, RT_FALSE);
case PWM_CMD_SET:
return imxrt_drv_qtmr_set(device, configuration);
case PWM_CMD_GET:
return imxrt_drv_qtmr_get(device, configuration);
default:
return RT_EINVAL;
}
}
static rt_err_t imxrt_drv_qtmr_init(TMR_Type *base, qtmr_channel_selection_t channel, uint16_t psc, uint32_t fre, uint8_t duty)
{
qtmr_config_t qtmr_config;
rt_uint32_t qtmr_clock_freq;
QTMR_GetDefaultConfig(&qtmr_config);
qtmr_config.primarySource = (qtmr_primary_count_source_t)(psc + 8);
qtmr_clock_freq = CLOCK_GetFreq(kCLOCK_IpgClk) / (1 << psc);
QTMR_Init(base, channel, &qtmr_config);
if (kStatus_Success != QTMR_SetupPwm(base, channel, fre, duty, DEFAULT_POLARITY, qtmr_clock_freq))
{
LOG_E(LOG_TAG" setup pwm failed \n");
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return -RT_ERROR;
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}
return RT_EOK;
}
static rt_err_t imxrt_qtmr_init()
{
TMR_Type *base_list[] =
{
#ifdef BSP_USING_QTMR1
TMR1,
#endif
#ifdef BSP_USING_QTMR2
TMR2,
#endif
#ifdef BSP_USING_QTMR3
TMR3,
#endif
#ifdef BSP_USING_QTMR4
TMR4,
#endif
};
rt_uint8_t channel_list[] =
{
#ifdef BSP_USING_QTMR1
#ifdef BSP_USING_QTMR1_CH0
1 << 0 |
#endif
#ifdef BSP_USING_QTMR1_CH1
1 << 1 |
#endif
#ifdef BSP_USING_QTMR1_CH2
1 << 2 |
#endif
#ifdef BSP_USING_QTMR1_CH3
1 << 3 |
#endif
0,
#endif
#ifdef BSP_USING_QTMR2
#ifdef BSP_USING_QTMR2_CH0
1 << 0 |
#endif
#ifdef BSP_USING_QTMR2_CH1
1 << 1 |
#endif
#ifdef BSP_USING_QTMR2_CH2
1 << 2 |
#endif
#ifdef BSP_USING_QTMR2_CH3
1 << 3 |
#endif
0,
#endif
#ifdef BSP_USING_QTMR3
#ifdef BSP_USING_QTMR3_CH0
1 << 0 |
#endif
#ifdef BSP_USING_QTMR3_CH1
1 << 1 |
#endif
#ifdef BSP_USING_QTMR3_CH2
1 << 2 |
#endif
#ifdef BSP_USING_QTMR3_CH3
1 << 3 |
#endif
0,
#endif
#ifdef BSP_USING_QTMR4
#ifdef BSP_USING_QTMR4_CH0
1 << 0 |
#endif
#ifdef BSP_USING_QTMR4_CH1
1 << 1 |
#endif
#ifdef BSP_USING_QTMR4_CH2
1 << 2 |
#endif
#ifdef BSP_USING_QTMR4_CH3
1 << 3 |
#endif
0,
#endif
};
for (rt_uint8_t i = 0; i < sizeof(base_list)/sizeof(TMR_Type *); ++i)
{
for (rt_uint8_t j = 0; j < 8; ++j)
{
if ((channel_list[i] >> j) & 1)
{
if (imxrt_drv_qtmr_init(base_list[i], j, DEFAULT_PRE, DEFAULT_FRE, DEFAULT_DUTY) != RT_EOK)
{
return -RT_ERROR;
}
}
}
}
return RT_EOK;
}
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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 */
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#if defined(BSP_USING_QTMR1) || defined(BSP_USING_QTMR2) || defined(BSP_USING_QTMR3) || defined(BSP_USING_QTMR4)
if (imxrt_qtmr_init() != RT_EOK)
{
LOG_E(LOG_TAG" init qtmr failed");
}
#endif
#ifdef BSP_USING_QTMR1
static struct rt_device_pwm qtmr1_device;
ret = rt_device_pwm_register(&qtmr1_device, "pwm5", &imxrt_drv_qtmr_ops, TMR1);
if (ret != RT_EOK)
{
LOG_E("%s register failed", "pwm5");
}
#endif /* BSP_USING_QTMR1 */
#ifdef BSP_USING_QTMR2
static struct rt_device_pwm qtmr2_device;
ret = rt_device_pwm_register(&qtmr2_device, "pwm6", &imxrt_drv_qtmr_ops, TMR2);
if (ret != RT_EOK)
{
LOG_E("%s register failed", "pwm6");
}
#endif /* BSP_USING_QTMR2 */
#ifdef BSP_USING_QTMR3
static struct rt_device_pwm qtmr3_device;
ret = rt_device_pwm_register(&qtmr3_device, "pwm7", &imxrt_drv_qtmr_ops, TMR3);
if (ret != RT_EOK)
{
LOG_E("%s register failed", "pwm7");
}
#endif /* BSP_USING_QTMR3 */
#ifdef BSP_USING_QTMR4
static struct rt_device_pwm qtmr4_device;
ret = rt_device_pwm_register(&qtmr4_device, "pwm8", &imxrt_drv_qtmr_ops, TMR4);
if (ret != RT_EOK)
{
LOG_E("%s register failed", "pwm8");
}
#endif /* BSP_USING_QTMR4 */
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return ret;
}
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INIT_BOARD_EXPORT(rt_hw_pwm_init);
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#endif /* BSP_USING_PWM */