288 lines
9.3 KiB
C
288 lines
9.3 KiB
C
|
/**************************************************************************//**
|
||
|
|
*
|
||
|
|
* @copyright (C) 2020 Nuvoton Technology Corp. All rights reserved.
|
||
|
|
*
|
||
|
|
* SPDX-License-Identifier: Apache-2.0
|
||
|
|
*
|
||
|
|
* Change Logs:
|
||
|
|
* Date Author Notes
|
||
|
|
* 2021-10-7 Wayne First version
|
||
|
|
*
|
||
|
|
******************************************************************************/
|
||
|
|
#include <rtconfig.h>
|
||
|
|
|
||
|
|
#if defined(BSP_USING_ECAP)
|
||
|
|
|
||
|
|
#include <rtdevice.h>
|
||
|
|
#include "drv_sys.h"
|
||
|
|
#include "drv_common.h"
|
||
|
|
#include "nu_bitutil.h"
|
||
|
|
|
||
|
|
#define ECAP_CHANNEL_NUM 0x3
|
||
|
|
#define ECAP_CHANNEL_MSK ((1<<ECAP_CHANNEL_NUM)-1)
|
||
|
|
|
||
|
|
#define ECAP_CLK_DIV ECAP_CAPTURE_TIMER_CLKDIV_32
|
||
|
|
|
||
|
|
/* Private typedef --------------------------------------------------------------*/
|
||
|
|
enum
|
||
|
|
{
|
||
|
|
ECAP_START = -1,
|
||
|
|
#if defined(BSP_USING_ECAP0)
|
||
|
|
ECAP0_IDX,
|
||
|
|
ECAP1_IDX,
|
||
|
|
ECAP2_IDX,
|
||
|
|
#endif
|
||
|
|
#if defined(BSP_USING_ECAP1)
|
||
|
|
ECAP3_IDX,
|
||
|
|
ECAP4_IDX,
|
||
|
|
ECAP5_IDX,
|
||
|
|
#endif
|
||
|
|
#if defined(BSP_USING_ECAP2)
|
||
|
|
ECAP6_IDX,
|
||
|
|
ECAP7_IDX,
|
||
|
|
ECAP8_IDX,
|
||
|
|
#endif
|
||
|
|
ECAP_CNT
|
||
|
|
};
|
||
|
|
|
||
|
|
struct nu_ecap
|
||
|
|
{
|
||
|
|
struct rt_inputcapture_device parent;
|
||
|
|
ECAP_T *base;
|
||
|
|
char *name;
|
||
|
|
IRQn_Type irqn;
|
||
|
|
uint32_t rstidx;
|
||
|
|
uint32_t modid;
|
||
|
|
|
||
|
|
float fUsPerTick;
|
||
|
|
uint8_t u8Channel;
|
||
|
|
rt_bool_t bfirstData;
|
||
|
|
uint32_t u32CurrentCnt;
|
||
|
|
uint32_t u32LastCnt;
|
||
|
|
rt_bool_t input_data_level;
|
||
|
|
} ;
|
||
|
|
typedef struct nu_ecap *nu_ecap_t;
|
||
|
|
|
||
|
|
/* Private functions ------------------------------------------------------------*/
|
||
|
|
static rt_err_t nu_ecap_init(struct rt_inputcapture_device *inputcapture);
|
||
|
|
static rt_err_t nu_ecap_open(struct rt_inputcapture_device *inputcapture);
|
||
|
|
static rt_err_t nu_ecap_close(struct rt_inputcapture_device *inputcapture);
|
||
|
|
static rt_err_t nu_ecap_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 ------------------------------------------------------------*/
|
||
|
|
static struct nu_ecap nu_ecap_arr [] =
|
||
|
|
{
|
||
|
|
#if defined(BSP_USING_ECAP0)
|
||
|
|
{ .base = ECAP0, .name = "ecap0i0", .irqn = ECAP0_IRQn, .rstidx = ECAP0_RST, .modid = ECAP0_MODULE },
|
||
|
|
{ .base = ECAP0, .name = "ecap0i1", .irqn = ECAP0_IRQn, .rstidx = ECAP0_RST, .modid = ECAP0_MODULE },
|
||
|
|
{ .base = ECAP0, .name = "ecap0i2", .irqn = ECAP0_IRQn, .rstidx = ECAP0_RST, .modid = ECAP0_MODULE },
|
||
|
|
#endif
|
||
|
|
#if defined(BSP_USING_ECAP1)
|
||
|
|
{ .base = ECAP1, .name = "ecap1i0", .irqn = ECAP1_IRQn, .rstidx = ECAP1_RST, .modid = ECAP1_MODULE },
|
||
|
|
{ .base = ECAP1, .name = "ecap1i1", .irqn = ECAP1_IRQn, .rstidx = ECAP1_RST, .modid = ECAP1_MODULE },
|
||
|
|
{ .base = ECAP1, .name = "ecap1i2", .irqn = ECAP1_IRQn, .rstidx = ECAP1_RST, .modid = ECAP1_MODULE },
|
||
|
|
#endif
|
||
|
|
#if defined(BSP_USING_ECAP2)
|
||
|
|
{ .base = ECAP2, .name = "ecap2i0", .irqn = ECAP2_IRQn, .rstidx = ECAP1_RST, .modid = ECAP2_MODULE },
|
||
|
|
{ .base = ECAP2, .name = "ecap2i1", .irqn = ECAP2_IRQn, .rstidx = ECAP1_RST, .modid = ECAP2_MODULE },
|
||
|
|
{ .base = ECAP2, .name = "ecap2i2", .irqn = ECAP2_IRQn, .rstidx = ECAP1_RST, .modid = ECAP2_MODULE },
|
||
|
|
#endif
|
||
|
|
};
|
||
|
|
|
||
|
|
static struct rt_inputcapture_ops nu_ecap_ops =
|
||
|
|
{
|
||
|
|
.init = nu_ecap_init,
|
||
|
|
.open = nu_ecap_open,
|
||
|
|
.close = nu_ecap_close,
|
||
|
|
.get_pulsewidth = nu_ecap_get_pulsewidth,
|
||
|
|
};
|
||
|
|
|
||
|
|
/* Functions define ------------------------------------------------------------*/
|
||
|
|
static void nu_ecap_isr(int vector, void *param)
|
||
|
|
{
|
||
|
|
/* Get base address of uart register */
|
||
|
|
rt_int32_t irqindex;
|
||
|
|
nu_ecap_t psNuEcap = (nu_ecap_t)param;
|
||
|
|
ECAP_T *base = psNuEcap->base;
|
||
|
|
|
||
|
|
/* Get input Capture status */
|
||
|
|
uint32_t u32Status = ECAP_GET_INT_STATUS(base);
|
||
|
|
uint32_t u32ChStatus = u32Status & ECAP_CHANNEL_MSK;
|
||
|
|
|
||
|
|
/* Check input capture channel flag */
|
||
|
|
/* Find index of pin is attached in pool. */
|
||
|
|
while ((irqindex = nu_ctz(u32ChStatus)) < ECAP_CHANNEL_NUM) // Count Trailing Zeros ==> Find First One
|
||
|
|
{
|
||
|
|
if (u32Status & (ECAP_STATUS_CAPTF0_Msk << (psNuEcap->u8Channel)))
|
||
|
|
{
|
||
|
|
/* Clear input capture channel flag */
|
||
|
|
ECAP_CLR_CAPTURE_FLAG(base, ECAP_STATUS_CAPTF0_Msk << (psNuEcap->u8Channel));
|
||
|
|
|
||
|
|
psNuEcap->input_data_level = NU_ECAP_GET_LEVEL(u32Status, psNuEcap->u8Channel);
|
||
|
|
|
||
|
|
psNuEcap->u32CurrentCnt = ECAP_GET_CNT_HOLD_VALUE(base, psNuEcap->u8Channel);
|
||
|
|
|
||
|
|
rt_hw_inputcapture_isr(&psNuEcap->parent, psNuEcap->input_data_level);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static rt_err_t nu_ecap_get_pulsewidth(struct rt_inputcapture_device *inputcapture, rt_uint32_t *pulsewidth_us)
|
||
|
|
{
|
||
|
|
rt_err_t ret = RT_EOK;
|
||
|
|
float fTempCnt;
|
||
|
|
nu_ecap_t psNuEcap = (nu_ecap_t) inputcapture;
|
||
|
|
|
||
|
|
RT_ASSERT(inputcapture != RT_NULL);
|
||
|
|
|
||
|
|
if (psNuEcap->bfirstData)
|
||
|
|
{
|
||
|
|
psNuEcap->bfirstData = RT_FALSE;
|
||
|
|
ret = RT_ERROR;
|
||
|
|
|
||
|
|
return -(ret);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (psNuEcap->u32CurrentCnt > psNuEcap->u32LastCnt)
|
||
|
|
fTempCnt = psNuEcap->u32CurrentCnt - psNuEcap->u32LastCnt;
|
||
|
|
else /* Overrun case */
|
||
|
|
fTempCnt = psNuEcap->u32CurrentCnt + ((0x1000000 - psNuEcap->u32LastCnt) + 1);
|
||
|
|
|
||
|
|
*pulsewidth_us = (int)(fTempCnt * psNuEcap->fUsPerTick);
|
||
|
|
|
||
|
|
psNuEcap->u32LastCnt = psNuEcap->u32CurrentCnt;
|
||
|
|
|
||
|
|
return -(ret);
|
||
|
|
}
|
||
|
|
|
||
|
|
static float get_ecap_tick_time_us(nu_ecap_t psNuEcap)
|
||
|
|
{
|
||
|
|
uint8_t u8ClockDivider[8] = { 1, 4, 16, 32, 64, 96, 112, 128};
|
||
|
|
|
||
|
|
if (psNuEcap->base == ECAP0)
|
||
|
|
return ((float)1000000 / ((float)CLK_GetPCLK2Freq() / u8ClockDivider[(psNuEcap->base->CTL1 & ECAP_CTL1_CLKSEL_Msk) >> ECAP_CTL1_CLKSEL_Pos]));
|
||
|
|
else
|
||
|
|
return ((float)1000000 / ((float)CLK_GetPCLK1Freq() / u8ClockDivider[(psNuEcap->base->CTL1 & ECAP_CTL1_CLKSEL_Msk) >> ECAP_CTL1_CLKSEL_Pos]));
|
||
|
|
}
|
||
|
|
|
||
|
|
static rt_err_t nu_ecap_init(struct rt_inputcapture_device *inputcapture)
|
||
|
|
{
|
||
|
|
return RT_EOK;
|
||
|
|
}
|
||
|
|
|
||
|
|
static rt_err_t nu_ecap_open(struct rt_inputcapture_device *inputcapture)
|
||
|
|
{
|
||
|
|
rt_err_t ret = RT_EOK;
|
||
|
|
nu_ecap_t psNuEcap = (nu_ecap_t) inputcapture;
|
||
|
|
|
||
|
|
RT_ASSERT(inputcapture != RT_NULL);
|
||
|
|
|
||
|
|
psNuEcap->fUsPerTick = get_ecap_tick_time_us(psNuEcap);
|
||
|
|
|
||
|
|
/* Enable ECAP Input Channel */
|
||
|
|
ECAP_ENABLE_INPUT_CHANNEL(psNuEcap->base, 0x1 << (ECAP_CTL0_IC0EN_Pos + psNuEcap->u8Channel));
|
||
|
|
|
||
|
|
/* Input Channel interrupt enabled */
|
||
|
|
ECAP_EnableINT(psNuEcap->base, 0x1 << (ECAP_CTL0_CAPIEN0_Pos + psNuEcap->u8Channel));
|
||
|
|
|
||
|
|
/* Enable interrupt. */
|
||
|
|
if ((psNuEcap->base->CTL0 & (ECAP_CHANNEL_MSK << ECAP_CTL0_CAPIEN0_Pos)) != 0U)
|
||
|
|
rt_hw_interrupt_umask(psNuEcap->irqn);
|
||
|
|
|
||
|
|
/* ECAP_CNT starts up-counting */
|
||
|
|
ECAP_CNT_START(psNuEcap->base);
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static rt_err_t nu_ecap_close(struct rt_inputcapture_device *inputcapture)
|
||
|
|
{
|
||
|
|
rt_err_t ret = RT_EOK;
|
||
|
|
|
||
|
|
nu_ecap_t psNuEcap = (nu_ecap_t) inputcapture;
|
||
|
|
|
||
|
|
RT_ASSERT(inputcapture != RT_NULL);
|
||
|
|
|
||
|
|
/* Input Channel interrupt disabled */
|
||
|
|
ECAP_DisableINT(psNuEcap->base, 0x1 << (ECAP_CTL0_CAPIEN0_Pos + psNuEcap->u8Channel));
|
||
|
|
|
||
|
|
/* Disable interrupt. */
|
||
|
|
if ((psNuEcap->base->CTL0 & (ECAP_CHANNEL_MSK << ECAP_CTL0_CAPIEN0_Pos)) == 0U)
|
||
|
|
rt_hw_interrupt_mask(psNuEcap->irqn);
|
||
|
|
|
||
|
|
/* Disable ECAP Input Channel */
|
||
|
|
ECAP_DISABLE_INPUT_CHANNEL(psNuEcap->base, 0x1 << (ECAP_CTL0_IC0EN_Pos + psNuEcap->u8Channel));
|
||
|
|
|
||
|
|
/* Clear input capture channel flag */
|
||
|
|
ECAP_CLR_CAPTURE_FLAG(psNuEcap->base, 0x1 << (ECAP_STATUS_CAPTF0_Pos + psNuEcap->u8Channel));
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void nu_ecap_channel_init(ECAP_T *base)
|
||
|
|
{
|
||
|
|
/* Enable ECAP */
|
||
|
|
ECAP_Open(base, ECAP_DISABLE_COMPARE);
|
||
|
|
|
||
|
|
ECAP_SEL_TIMER_CLK_DIV(base, ECAP_CLK_DIV);
|
||
|
|
|
||
|
|
/* Select Reload function */
|
||
|
|
ECAP_SET_CNT_CLEAR_EVENT(base, ECAP_CTL1_OVRLDEN_Msk);
|
||
|
|
|
||
|
|
/* Enable ECAP source IC */
|
||
|
|
ECAP_SEL_INPUT_SRC(base, ECAP_IC0, ECAP_CAP_INPUT_SRC_FROM_IC);
|
||
|
|
ECAP_SEL_INPUT_SRC(base, ECAP_IC1, ECAP_CAP_INPUT_SRC_FROM_IC);
|
||
|
|
ECAP_SEL_INPUT_SRC(base, ECAP_IC2, ECAP_CAP_INPUT_SRC_FROM_IC);
|
||
|
|
|
||
|
|
/* Select IC detect rising edge */
|
||
|
|
ECAP_SEL_CAPTURE_EDGE(base, ECAP_IC0, ECAP_RISING_FALLING_EDGE);
|
||
|
|
ECAP_SEL_CAPTURE_EDGE(base, ECAP_IC1, ECAP_RISING_FALLING_EDGE);
|
||
|
|
ECAP_SEL_CAPTURE_EDGE(base, ECAP_IC2, ECAP_RISING_FALLING_EDGE);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Init and register ecap capture */
|
||
|
|
static int rt_hw_ecap_init(void)
|
||
|
|
{
|
||
|
|
int i;
|
||
|
|
rt_err_t ret = RT_EOK;
|
||
|
|
|
||
|
|
for (i = (ECAP_START + 1); i < ECAP_CNT; i++)
|
||
|
|
{
|
||
|
|
nu_ecap_t psNuEcap = &nu_ecap_arr[i];
|
||
|
|
|
||
|
|
psNuEcap->u8Channel = i % ECAP_CHANNEL_NUM;
|
||
|
|
psNuEcap->bfirstData = RT_TRUE;
|
||
|
|
psNuEcap->u32CurrentCnt = 0;
|
||
|
|
psNuEcap->u32LastCnt = 0;
|
||
|
|
psNuEcap->parent.ops = &nu_ecap_ops;
|
||
|
|
|
||
|
|
if ((psNuEcap->u8Channel % ECAP_CHANNEL_NUM) == 0)
|
||
|
|
{
|
||
|
|
/* register ecap module */
|
||
|
|
CLK_EnableModuleClock(psNuEcap->modid);
|
||
|
|
SYS_ResetModule(psNuEcap->rstidx);
|
||
|
|
|
||
|
|
nu_ecap_channel_init(psNuEcap->base);
|
||
|
|
|
||
|
|
/* register isr */
|
||
|
|
rt_hw_interrupt_install(psNuEcap->irqn, nu_ecap_isr, psNuEcap, psNuEcap->name);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* register inputcapture device */
|
||
|
|
ret = rt_device_inputcapture_register(&psNuEcap->parent, psNuEcap->name, psNuEcap);
|
||
|
|
RT_ASSERT(ret == RT_EOK);
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
INIT_DEVICE_EXPORT(rt_hw_ecap_init);
|
||
|
|
|
||
|
|
#endif //#if defined(BSP_USING_ECAP)
|