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rt-thread-official/bsp/nuvoton/libraries/m480/rtt_port/drv_ecap.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
* 2020-5-21 Philo First version
*
******************************************************************************/
#include <rtconfig.h>
#if defined(BSP_USING_ECAP)
#if ((BSP_USING_ECAP0_CHMSK+BSP_USING_ECAP1_CHMSK)!=0)
#include <rtdevice.h>
#include "NuMicro.h"
#define ECAP_CH0_POS (0)
#define ECAP_CH1_POS (1)
#define ECAP_CH2_POS (2)
#define ECAP_CHANNEL_NUM 0x3
#define ECAP_CLK_DIV ECAP_CAPTURE_TIMER_CLKDIV_32
/* Private typedef --------------------------------------------------------------*/
typedef struct _ecap_dev
{
ECAP_T *ecap_base;
float fUsPerTick;
} nu_ecap_dev_t;
typedef struct _ecap
{
struct rt_inputcapture_device parent;
nu_ecap_dev_t *ecap_dev;
uint8_t u8Channel;
rt_bool_t bfirstData;
uint32_t u32CurrentCnt;
uint32_t u32LastCnt;
rt_bool_t input_data_level;
} nu_capture_t;
/* Private functions ------------------------------------------------------------*/
static rt_err_t nu_capture_init(struct rt_inputcapture_device *inputcapture);
static rt_err_t nu_capture_open(struct rt_inputcapture_device *inputcapture);
static rt_err_t nu_capture_close(struct rt_inputcapture_device *inputcapture);
static rt_err_t nu_capture_get_pulsewidth(struct rt_inputcapture_device *inputcapture, rt_uint32_t *pulsewidth_us);
/* Private define ---------------------------------------------------------------*/
#define NU_ECAP_GET_LEVEL(status, channel) ((status&(ECAP_STATUS_CAP0_Msk<<channel))?1:0)
#define ECAP_GET_CLK_DIV_INDEX(ecap) ((ecap)->CTL1 = ((ecap)->CTL1 & ECAP_CTL1_CLKSEL_Msk)>>ECAP_CTL1_CLKSEL_Pos)
/* Public functions -------------------------------------------------------------*/
/* Private variables ------------------------------------------------------------*/
#if (BSP_USING_ECAP0_CHMSK!=0)
static const char *nu_ecap0_device_name[ECAP_CHANNEL_NUM] = { "ecap0i0", "ecap0i1", "ecap0i2" };
static nu_capture_t *nu_ecap0_capture[ECAP_CHANNEL_NUM] = {0};
static nu_ecap_dev_t nu_ecap0_dev = {.ecap_base = ECAP0};
#endif
#if (BSP_USING_ECAP1_CHMSK!=0)
static const char *nu_ecap1_device_name[ECAP_CHANNEL_NUM] = { "ecap1i0", "ecap1i1", "ecap1i2" };
static nu_capture_t *nu_ecap1_capture[ECAP_CHANNEL_NUM] = {0};
static nu_ecap_dev_t nu_ecap1_dev = {.ecap_base = ECAP1};
#endif
static struct rt_inputcapture_ops nu_capture_ops =
{
.init = nu_capture_init,
.open = nu_capture_open,
.close = nu_capture_close,
.get_pulsewidth = nu_capture_get_pulsewidth,
};
/* Functions define ------------------------------------------------------------*/
#if (BSP_USING_ECAP0_CHMSK!=0)
void ECAP0_IRQHandler(void)
{
/* enter interrupt */
rt_interrupt_enter();
uint32_t u32Status;
/* Get input Capture status */
u32Status = ECAP_GET_INT_STATUS(ECAP0);
#if (BSP_USING_ECAP0_CHMSK & (0x1<<ECAP_CH0_POS))
/* Check input capture channel flag */
if ((u32Status & ECAP_STATUS_CAPTF0_Msk) == ECAP_STATUS_CAPTF0_Msk)
{
/* Clear input capture channel flag */
ECAP_CLR_CAPTURE_FLAG(ECAP0, ECAP_STATUS_CAPTF0_Msk);
if (NU_ECAP_GET_LEVEL(u32Status, 0))
{
nu_ecap0_capture[0]->input_data_level = RT_FALSE;
}
else
{
nu_ecap0_capture[0]->input_data_level = RT_TRUE;
}
nu_ecap0_capture[0]->u32CurrentCnt = ECAP_GET_CNT_HOLD_VALUE(ECAP0, ECAP_IC0);
rt_hw_inputcapture_isr(&nu_ecap0_capture[0]->parent, nu_ecap0_capture[0]->input_data_level);
}
#endif
#if (BSP_USING_ECAP0_CHMSK & (0x1<<ECAP_CH1_POS))
/* Check input capture channel flag */
if ((u32Status & ECAP_STATUS_CAPTF1_Msk) == ECAP_STATUS_CAPTF1_Msk)
{
/* Clear input capture channel flag */
ECAP_CLR_CAPTURE_FLAG(ECAP0, ECAP_STATUS_CAPTF1_Msk);
if (NU_ECAP_GET_LEVEL(u32Status, 1))
{
nu_ecap0_capture[1]->input_data_level = RT_FALSE;
}
else
{
nu_ecap0_capture[1]->input_data_level = RT_TRUE;
}
nu_ecap0_capture[1]->u32CurrentCnt = ECAP_GET_CNT_HOLD_VALUE(ECAP0, ECAP_IC1);
rt_hw_inputcapture_isr(&nu_ecap0_capture[1]->parent, nu_ecap0_capture[1]->input_data_level);
}
#endif
#if (BSP_USING_ECAP0_CHMSK & (0x1<<ECAP_CH2_POS))
/* Check input capture channel flag */
if ((u32Status & ECAP_STATUS_CAPTF2_Msk) == ECAP_STATUS_CAPTF2_Msk)
{
/* Clear input capture channel flag */
ECAP_CLR_CAPTURE_FLAG(ECAP0, ECAP_STATUS_CAPTF2_Msk);
if (NU_ECAP_GET_LEVEL(u32Status, 2))
{
nu_ecap0_capture[2]->input_data_level = RT_FALSE;
}
else
{
nu_ecap0_capture[2]->input_data_level = RT_TRUE;
}
nu_ecap0_capture[2]->u32CurrentCnt = ECAP_GET_CNT_HOLD_VALUE(ECAP0, ECAP_IC2);
rt_hw_inputcapture_isr(&nu_ecap0_capture[2]->parent, nu_ecap0_capture[2]->input_data_level);
}
#endif
/* leave interrupt */
rt_interrupt_leave();
}
#endif //(BSP_USING_ECAP0_CHMSK!=0)
#if (BSP_USING_ECAP1_CHMSK!=0)
void ECAP1_IRQHandler(void)
{
/* enter interrupt */
rt_interrupt_enter();
uint32_t u32Status;
/* Get input Capture status */
u32Status = ECAP_GET_INT_STATUS(ECAP1);
#if (BSP_USING_ECAP1_CHMSK & (0x1<<ECAP_CH0_POS))
/* Check input capture channel flag */
if ((u32Status & ECAP_STATUS_CAPTF0_Msk) == ECAP_STATUS_CAPTF0_Msk)
{
/* Clear input capture channel flag */
ECAP_CLR_CAPTURE_FLAG(ECAP1, ECAP_STATUS_CAPTF0_Msk);
if (NU_ECAP_GET_LEVEL(u32Status, 0))
{
nu_ecap1_capture[0]->input_data_level = RT_FALSE;
}
else
{
nu_ecap1_capture[0]->input_data_level = RT_TRUE;
}
nu_ecap1_capture[0]->u32CurrentCnt = ECAP_GET_CNT_HOLD_VALUE(ECAP1, ECAP_IC0);
rt_hw_inputcapture_isr(&nu_ecap1_capture[0]->parent, nu_ecap1_capture[0]->input_data_level);
}
#endif
#if (BSP_USING_ECAP1_CHMSK & (0x1<<ECAP_CH1_POS))
/* Check input capture channel flag */
if ((u32Status & ECAP_STATUS_CAPTF1_Msk) == ECAP_STATUS_CAPTF1_Msk)
{
/* Clear input capture channel flag */
ECAP_CLR_CAPTURE_FLAG(ECAP1, ECAP_STATUS_CAPTF1_Msk);
if (NU_ECAP_GET_LEVEL(u32Status, 1))
{
nu_ecap1_capture[1]->input_data_level = RT_FALSE;
}
else
{
nu_ecap1_capture[1]->input_data_level = RT_TRUE;
}
nu_ecap1_capture[1]->u32CurrentCnt = ECAP_GET_CNT_HOLD_VALUE(ECAP1, ECAP_IC1);
rt_hw_inputcapture_isr(&nu_ecap1_capture[1]->parent, nu_ecap1_capture[1]->input_data_level);
}
#endif
#if (BSP_USING_ECAP1_CHMSK & (0x1<<ECAP_CH2_POS))
/* Check input capture channel flag */
if ((u32Status & ECAP_STATUS_CAPTF2_Msk) == ECAP_STATUS_CAPTF2_Msk)
{
/* Clear input capture channel flag */
ECAP_CLR_CAPTURE_FLAG(ECAP1, ECAP_STATUS_CAPTF2_Msk);
if (NU_ECAP_GET_LEVEL(u32Status, 2))
{
nu_ecap1_capture[2]->input_data_level = RT_FALSE;
}
else
{
nu_ecap1_capture[2]->input_data_level = RT_TRUE;
}
nu_ecap1_capture[2]->u32CurrentCnt = ECAP_GET_CNT_HOLD_VALUE(ECAP1, ECAP_IC2);
rt_hw_inputcapture_isr(&nu_ecap1_capture[2]->parent, nu_ecap1_capture[2]->input_data_level);
}
#endif
/* leave interrupt */
rt_interrupt_leave();
}
#endif //(BSP_USING_ECAP1_CHMSK!=0)
static rt_err_t nu_capture_get_pulsewidth(struct rt_inputcapture_device *inputcapture, rt_uint32_t *pulsewidth_us)
{
rt_err_t ret = RT_EOK;
nu_capture_t *nu_capture;
float fTempCnt;
nu_capture = (nu_capture_t *)inputcapture;
if (nu_capture->bfirstData)
{
nu_capture->bfirstData = RT_FALSE;
ret = -RT_ERROR;
return -(ret);
}
if (nu_capture->u32CurrentCnt > nu_capture->u32LastCnt)
fTempCnt = nu_capture->u32CurrentCnt - nu_capture->u32LastCnt;
else /* Overrun case */
fTempCnt = nu_capture->u32CurrentCnt + ((0x1000000 - nu_capture->u32LastCnt) + 1);
*pulsewidth_us = (int)(fTempCnt * nu_capture->ecap_dev->fUsPerTick);
nu_capture->u32LastCnt = nu_capture->u32CurrentCnt;
return -(ret);
}
static float get_ecap_tick_time_us(nu_capture_t *nu_capture)
{
uint8_t u8ClockDivider[8] = { 1, 4, 16, 32, 64, 96, 112, 128};
if (nu_capture->ecap_dev->ecap_base == ECAP0)
return ((float)1000000 / ((float)CLK_GetPCLK0Freq() / u8ClockDivider[(nu_capture->ecap_dev->ecap_base->CTL1 & ECAP_CTL1_CLKSEL_Msk) >> ECAP_CTL1_CLKSEL_Pos]));
else
return ((float)1000000 / ((float)CLK_GetPCLK1Freq() / u8ClockDivider[(nu_capture->ecap_dev->ecap_base->CTL1 & ECAP_CTL1_CLKSEL_Msk) >> ECAP_CTL1_CLKSEL_Pos]));
}
static rt_err_t nu_ecap_init(nu_capture_t *nu_capture)
{
rt_err_t ret = -RT_ERROR;
static rt_bool_t bECAP0Inited = RT_FALSE;
static rt_bool_t bECAP1Inited = RT_FALSE;
if (nu_capture->ecap_dev->ecap_base == ECAP0)
{
if (bECAP0Inited == RT_FALSE)
{
/* Enable ECAP0 clock */
SYS_UnlockReg();
CLK_EnableModuleClock(ECAP0_MODULE);
SYS_LockReg();
NVIC_EnableIRQ(ECAP0_IRQn);
bECAP0Inited = RT_TRUE;
}
else
{
return ret = RT_EOK;
}
}
else if (nu_capture->ecap_dev->ecap_base == ECAP1)
{
if (bECAP1Inited == RT_FALSE)
{
/* Enable ECAP1 clock */
SYS_UnlockReg();
CLK_EnableModuleClock(ECAP1_MODULE);
SYS_LockReg();
NVIC_EnableIRQ(ECAP1_IRQn);
bECAP1Inited = RT_TRUE;
}
else
{
return ret = RT_EOK;
}
}
else
{
return ret;
}
/* Enable ECAP */
ECAP_Open(nu_capture->ecap_dev->ecap_base, ECAP_DISABLE_COMPARE);
ECAP_SEL_TIMER_CLK_DIV(nu_capture->ecap_dev->ecap_base, ECAP_CLK_DIV);
/* Select Reload function */
ECAP_SET_CNT_CLEAR_EVENT(nu_capture->ecap_dev->ecap_base, ECAP_CTL1_OVRLDEN_Msk);
/* Enable ECAP0 source IC */
ECAP_SEL_INPUT_SRC(nu_capture->ecap_dev->ecap_base, ECAP_IC0, ECAP_CAP_INPUT_SRC_FROM_IC);
ECAP_SEL_INPUT_SRC(nu_capture->ecap_dev->ecap_base, ECAP_IC1, ECAP_CAP_INPUT_SRC_FROM_IC);
ECAP_SEL_INPUT_SRC(nu_capture->ecap_dev->ecap_base, ECAP_IC2, ECAP_CAP_INPUT_SRC_FROM_IC);
/* Select IC detect rising edge */
ECAP_SEL_CAPTURE_EDGE(nu_capture->ecap_dev->ecap_base, ECAP_IC0, ECAP_RISING_FALLING_EDGE);
ECAP_SEL_CAPTURE_EDGE(nu_capture->ecap_dev->ecap_base, ECAP_IC1, ECAP_RISING_FALLING_EDGE);
ECAP_SEL_CAPTURE_EDGE(nu_capture->ecap_dev->ecap_base, ECAP_IC2, ECAP_RISING_FALLING_EDGE);
ret = RT_EOK;
return -(ret);
}
static rt_err_t nu_capture_init(struct rt_inputcapture_device *inputcapture)
{
rt_err_t ret = RT_EOK;
nu_capture_t *nu_capture;
RT_ASSERT(inputcapture != RT_NULL);
nu_capture = (nu_capture_t *) inputcapture;
if (nu_ecap_init(nu_capture) != RT_EOK)
{
rt_kprintf("Failed to initialize ECAP.\n");
ret = -RT_ERROR;
}
return -(ret);
}
static rt_err_t nu_capture_open(struct rt_inputcapture_device *inputcapture)
{
rt_err_t ret = RT_EOK;
nu_capture_t *nu_capture;
RT_ASSERT(inputcapture != RT_NULL);
nu_capture = (nu_capture_t *) inputcapture;
nu_capture->ecap_dev->fUsPerTick = get_ecap_tick_time_us(nu_capture);
/* Enable ECAP Input Channel */
ECAP_ENABLE_INPUT_CHANNEL(nu_capture->ecap_dev->ecap_base, 0x1 << (ECAP_CTL0_IC0EN_Pos + nu_capture->u8Channel));
/* Input Channel interrupt enabled */
ECAP_EnableINT(nu_capture->ecap_dev->ecap_base, 0x1 << (ECAP_CTL0_CAPIEN0_Pos + nu_capture->u8Channel));
/* ECAP_CNT starts up-counting */
ECAP_CNT_START(nu_capture->ecap_dev->ecap_base);
return ret;
}
static rt_err_t nu_capture_close(struct rt_inputcapture_device *inputcapture)
{
rt_err_t ret = RT_EOK;
nu_capture_t *nu_capture;
RT_ASSERT(inputcapture != RT_NULL);
nu_capture = (nu_capture_t *) inputcapture;
/* Input Channel interrupt disabled */
ECAP_DisableINT(nu_capture->ecap_dev->ecap_base, 0x1 << (ECAP_CTL0_CAPIEN0_Pos + nu_capture->u8Channel));
/* Disable ECAP Input Channel */
ECAP_DISABLE_INPUT_CHANNEL(nu_capture->ecap_dev->ecap_base, 0x1 << (ECAP_CTL0_IC0EN_Pos + nu_capture->u8Channel));
/* Clear input capture channel flag */
ECAP_CLR_CAPTURE_FLAG(nu_capture->ecap_dev->ecap_base, 0x1 << (ECAP_STATUS_CAPTF0_Pos + nu_capture->u8Channel));
return ret;
}
static void ecap_init(nu_capture_t *nu_capture, uint8_t u8Channel, nu_ecap_dev_t *ecap_dev, const char *device_name)
{
nu_capture->ecap_dev = ecap_dev;
nu_capture->u8Channel = u8Channel;
nu_capture->bfirstData = RT_TRUE;
nu_capture->u32CurrentCnt = 0;
nu_capture->u32LastCnt = 0;
nu_capture->parent.ops = &nu_capture_ops;
/* register inputcapture device */
rt_device_inputcapture_register(&nu_capture->parent, device_name, &nu_capture);
}
/* Init and register ecap capture */
static int nu_ecap_capture_device_init(void)
{
for (int i = 0; i < ECAP_CHANNEL_NUM; i++)
{
#if (BSP_USING_ECAP0_CHMSK!=0)
if (BSP_USING_ECAP0_CHMSK & (0x1 << i))
{
nu_ecap0_capture[i] = (nu_capture_t *)rt_malloc(sizeof(nu_capture_t));
ecap_init(nu_ecap0_capture[i], i, &nu_ecap0_dev, nu_ecap0_device_name[i]);
}
#endif //#if (BSP_USING_ECAP0_CHMSK!=0)
#if (BSP_USING_ECAP1_CHMSK!=0)
if (BSP_USING_ECAP1_CHMSK & (0x1 << i))
{
nu_ecap1_capture[i] = (nu_capture_t *)rt_malloc(sizeof(nu_capture_t));
ecap_init(nu_ecap1_capture[i], i, &nu_ecap1_dev, nu_ecap1_device_name[i]);
}
#endif //#if (BSP_USING_ECAP1_CHMSK!=0)
}
return 0;
}
INIT_DEVICE_EXPORT(nu_ecap_capture_device_init);
#endif //#if ((BSP_USING_ECAP0_CHMSK+BSP_USING_ECAP1_CHMSK)!=0)
#endif //#if defined(BSP_USING_ECAP)
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