288 lines
9.3 KiB
C
288 lines
9.3 KiB
C
/**************************************************************************//**
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*
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* @copyright (C) 2020 Nuvoton Technology Corp. All rights reserved.
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2021-10-7 Wayne First version
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*
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******************************************************************************/
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#include <rtconfig.h>
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#if defined(BSP_USING_ECAP)
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#include <rtdevice.h>
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#include "drv_sys.h"
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#include "drv_common.h"
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#include "nu_bitutil.h"
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#define ECAP_CHANNEL_NUM 0x3
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#define ECAP_CHANNEL_MSK ((1<<ECAP_CHANNEL_NUM)-1)
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#define ECAP_CLK_DIV ECAP_CAPTURE_TIMER_CLKDIV_32
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/* Private typedef --------------------------------------------------------------*/
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enum
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{
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ECAP_START = -1,
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#if defined(BSP_USING_ECAP0)
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ECAP0_IDX,
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ECAP1_IDX,
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ECAP2_IDX,
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#endif
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#if defined(BSP_USING_ECAP1)
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ECAP3_IDX,
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ECAP4_IDX,
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ECAP5_IDX,
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#endif
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#if defined(BSP_USING_ECAP2)
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ECAP6_IDX,
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ECAP7_IDX,
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ECAP8_IDX,
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#endif
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ECAP_CNT
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};
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struct nu_ecap
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{
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struct rt_inputcapture_device parent;
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ECAP_T *base;
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char *name;
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IRQn_Type irqn;
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uint32_t rstidx;
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uint32_t modid;
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float fUsPerTick;
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uint8_t u8Channel;
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rt_bool_t bfirstData;
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uint32_t u32CurrentCnt;
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uint32_t u32LastCnt;
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rt_bool_t input_data_level;
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} ;
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typedef struct nu_ecap *nu_ecap_t;
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/* Private functions ------------------------------------------------------------*/
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static rt_err_t nu_ecap_init(struct rt_inputcapture_device *inputcapture);
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static rt_err_t nu_ecap_open(struct rt_inputcapture_device *inputcapture);
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static rt_err_t nu_ecap_close(struct rt_inputcapture_device *inputcapture);
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static rt_err_t nu_ecap_get_pulsewidth(struct rt_inputcapture_device *inputcapture, rt_uint32_t *pulsewidth_us);
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/* Private define ---------------------------------------------------------------*/
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#define NU_ECAP_GET_LEVEL(status, channel) ((status&(ECAP_STATUS_CAP0_Msk<<channel))?1:0)
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#define ECAP_GET_CLK_DIV_INDEX(ecap) ((ecap)->CTL1 = ((ecap)->CTL1 & ECAP_CTL1_CLKSEL_Msk)>>ECAP_CTL1_CLKSEL_Pos)
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/* Public functions -------------------------------------------------------------*/
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/* Private variables ------------------------------------------------------------*/
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static struct nu_ecap nu_ecap_arr [] =
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{
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#if defined(BSP_USING_ECAP0)
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{ .base = ECAP0, .name = "ecap0i0", .irqn = ECAP0_IRQn, .rstidx = ECAP0_RST, .modid = ECAP0_MODULE },
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{ .base = ECAP0, .name = "ecap0i1", .irqn = ECAP0_IRQn, .rstidx = ECAP0_RST, .modid = ECAP0_MODULE },
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{ .base = ECAP0, .name = "ecap0i2", .irqn = ECAP0_IRQn, .rstidx = ECAP0_RST, .modid = ECAP0_MODULE },
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#endif
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#if defined(BSP_USING_ECAP1)
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{ .base = ECAP1, .name = "ecap1i0", .irqn = ECAP1_IRQn, .rstidx = ECAP1_RST, .modid = ECAP1_MODULE },
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{ .base = ECAP1, .name = "ecap1i1", .irqn = ECAP1_IRQn, .rstidx = ECAP1_RST, .modid = ECAP1_MODULE },
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{ .base = ECAP1, .name = "ecap1i2", .irqn = ECAP1_IRQn, .rstidx = ECAP1_RST, .modid = ECAP1_MODULE },
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#endif
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#if defined(BSP_USING_ECAP2)
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{ .base = ECAP2, .name = "ecap2i0", .irqn = ECAP2_IRQn, .rstidx = ECAP1_RST, .modid = ECAP2_MODULE },
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{ .base = ECAP2, .name = "ecap2i1", .irqn = ECAP2_IRQn, .rstidx = ECAP1_RST, .modid = ECAP2_MODULE },
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{ .base = ECAP2, .name = "ecap2i2", .irqn = ECAP2_IRQn, .rstidx = ECAP1_RST, .modid = ECAP2_MODULE },
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#endif
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};
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static struct rt_inputcapture_ops nu_ecap_ops =
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{
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.init = nu_ecap_init,
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.open = nu_ecap_open,
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.close = nu_ecap_close,
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.get_pulsewidth = nu_ecap_get_pulsewidth,
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};
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/* Functions define ------------------------------------------------------------*/
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static void nu_ecap_isr(int vector, void *param)
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{
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/* Get base address of uart register */
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rt_int32_t irqindex;
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nu_ecap_t psNuEcap = (nu_ecap_t)param;
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ECAP_T *base = psNuEcap->base;
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/* Get input Capture status */
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uint32_t u32Status = ECAP_GET_INT_STATUS(base);
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uint32_t u32ChStatus = u32Status & ECAP_CHANNEL_MSK;
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/* Check input capture channel flag */
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/* Find index of pin is attached in pool. */
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while ((irqindex = nu_ctz(u32ChStatus)) < ECAP_CHANNEL_NUM) // Count Trailing Zeros ==> Find First One
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{
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if (u32Status & (ECAP_STATUS_CAPTF0_Msk << (psNuEcap->u8Channel)))
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{
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/* Clear input capture channel flag */
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ECAP_CLR_CAPTURE_FLAG(base, ECAP_STATUS_CAPTF0_Msk << (psNuEcap->u8Channel));
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psNuEcap->input_data_level = NU_ECAP_GET_LEVEL(u32Status, psNuEcap->u8Channel);
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psNuEcap->u32CurrentCnt = ECAP_GET_CNT_HOLD_VALUE(base, psNuEcap->u8Channel);
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rt_hw_inputcapture_isr(&psNuEcap->parent, psNuEcap->input_data_level);
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}
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}
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}
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static rt_err_t nu_ecap_get_pulsewidth(struct rt_inputcapture_device *inputcapture, rt_uint32_t *pulsewidth_us)
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{
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rt_err_t ret = RT_EOK;
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float fTempCnt;
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nu_ecap_t psNuEcap = (nu_ecap_t) inputcapture;
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RT_ASSERT(inputcapture != RT_NULL);
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if (psNuEcap->bfirstData)
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{
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psNuEcap->bfirstData = RT_FALSE;
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ret = -RT_ERROR;
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return -(ret);
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}
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if (psNuEcap->u32CurrentCnt > psNuEcap->u32LastCnt)
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fTempCnt = psNuEcap->u32CurrentCnt - psNuEcap->u32LastCnt;
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else /* Overrun case */
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fTempCnt = psNuEcap->u32CurrentCnt + ((0x1000000 - psNuEcap->u32LastCnt) + 1);
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*pulsewidth_us = (int)(fTempCnt * psNuEcap->fUsPerTick);
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psNuEcap->u32LastCnt = psNuEcap->u32CurrentCnt;
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return -(ret);
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}
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static float get_ecap_tick_time_us(nu_ecap_t psNuEcap)
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{
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uint8_t u8ClockDivider[8] = { 1, 4, 16, 32, 64, 96, 112, 128};
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if (psNuEcap->base == ECAP0)
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return ((float)1000000 / ((float)CLK_GetPCLK2Freq() / u8ClockDivider[(psNuEcap->base->CTL1 & ECAP_CTL1_CLKSEL_Msk) >> ECAP_CTL1_CLKSEL_Pos]));
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else
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return ((float)1000000 / ((float)CLK_GetPCLK1Freq() / u8ClockDivider[(psNuEcap->base->CTL1 & ECAP_CTL1_CLKSEL_Msk) >> ECAP_CTL1_CLKSEL_Pos]));
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}
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static rt_err_t nu_ecap_init(struct rt_inputcapture_device *inputcapture)
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{
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return RT_EOK;
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}
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static rt_err_t nu_ecap_open(struct rt_inputcapture_device *inputcapture)
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{
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rt_err_t ret = RT_EOK;
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nu_ecap_t psNuEcap = (nu_ecap_t) inputcapture;
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RT_ASSERT(inputcapture != RT_NULL);
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psNuEcap->fUsPerTick = get_ecap_tick_time_us(psNuEcap);
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/* Enable ECAP Input Channel */
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ECAP_ENABLE_INPUT_CHANNEL(psNuEcap->base, 0x1 << (ECAP_CTL0_IC0EN_Pos + psNuEcap->u8Channel));
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/* Input Channel interrupt enabled */
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ECAP_EnableINT(psNuEcap->base, 0x1 << (ECAP_CTL0_CAPIEN0_Pos + psNuEcap->u8Channel));
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/* Enable interrupt. */
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if ((psNuEcap->base->CTL0 & (ECAP_CHANNEL_MSK << ECAP_CTL0_CAPIEN0_Pos)) != 0U)
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rt_hw_interrupt_umask(psNuEcap->irqn);
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/* ECAP_CNT starts up-counting */
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ECAP_CNT_START(psNuEcap->base);
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return ret;
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}
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static rt_err_t nu_ecap_close(struct rt_inputcapture_device *inputcapture)
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{
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rt_err_t ret = RT_EOK;
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nu_ecap_t psNuEcap = (nu_ecap_t) inputcapture;
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RT_ASSERT(inputcapture != RT_NULL);
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/* Input Channel interrupt disabled */
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ECAP_DisableINT(psNuEcap->base, 0x1 << (ECAP_CTL0_CAPIEN0_Pos + psNuEcap->u8Channel));
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/* Disable interrupt. */
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if ((psNuEcap->base->CTL0 & (ECAP_CHANNEL_MSK << ECAP_CTL0_CAPIEN0_Pos)) == 0U)
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rt_hw_interrupt_mask(psNuEcap->irqn);
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/* Disable ECAP Input Channel */
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ECAP_DISABLE_INPUT_CHANNEL(psNuEcap->base, 0x1 << (ECAP_CTL0_IC0EN_Pos + psNuEcap->u8Channel));
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/* Clear input capture channel flag */
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ECAP_CLR_CAPTURE_FLAG(psNuEcap->base, 0x1 << (ECAP_STATUS_CAPTF0_Pos + psNuEcap->u8Channel));
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return ret;
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}
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static void nu_ecap_channel_init(ECAP_T *base)
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{
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/* Enable ECAP */
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ECAP_Open(base, ECAP_DISABLE_COMPARE);
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ECAP_SEL_TIMER_CLK_DIV(base, ECAP_CLK_DIV);
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/* Select Reload function */
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ECAP_SET_CNT_CLEAR_EVENT(base, ECAP_CTL1_OVRLDEN_Msk);
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/* Enable ECAP source IC */
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ECAP_SEL_INPUT_SRC(base, ECAP_IC0, ECAP_CAP_INPUT_SRC_FROM_IC);
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ECAP_SEL_INPUT_SRC(base, ECAP_IC1, ECAP_CAP_INPUT_SRC_FROM_IC);
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ECAP_SEL_INPUT_SRC(base, ECAP_IC2, ECAP_CAP_INPUT_SRC_FROM_IC);
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/* Select IC detect rising edge */
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ECAP_SEL_CAPTURE_EDGE(base, ECAP_IC0, ECAP_RISING_FALLING_EDGE);
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ECAP_SEL_CAPTURE_EDGE(base, ECAP_IC1, ECAP_RISING_FALLING_EDGE);
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ECAP_SEL_CAPTURE_EDGE(base, ECAP_IC2, ECAP_RISING_FALLING_EDGE);
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}
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/* Init and register ecap capture */
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static int rt_hw_ecap_init(void)
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{
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int i;
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rt_err_t ret = RT_EOK;
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for (i = (ECAP_START + 1); i < ECAP_CNT; i++)
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{
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nu_ecap_t psNuEcap = &nu_ecap_arr[i];
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psNuEcap->u8Channel = i % ECAP_CHANNEL_NUM;
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psNuEcap->bfirstData = RT_TRUE;
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psNuEcap->u32CurrentCnt = 0;
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psNuEcap->u32LastCnt = 0;
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psNuEcap->parent.ops = &nu_ecap_ops;
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if ((psNuEcap->u8Channel % ECAP_CHANNEL_NUM) == 0)
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{
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/* register ecap module */
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CLK_EnableModuleClock(psNuEcap->modid);
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SYS_ResetModule(psNuEcap->rstidx);
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nu_ecap_channel_init(psNuEcap->base);
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/* register isr */
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rt_hw_interrupt_install(psNuEcap->irqn, nu_ecap_isr, psNuEcap, psNuEcap->name);
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}
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/* register inputcapture device */
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ret = rt_device_inputcapture_register(&psNuEcap->parent, psNuEcap->name, psNuEcap);
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RT_ASSERT(ret == RT_EOK);
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}
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return 0;
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}
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INIT_DEVICE_EXPORT(rt_hw_ecap_init);
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#endif //#if defined(BSP_USING_ECAP)
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