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/**************************************************************************//**
*
* @copyright (C) 2026 Novosense Technology Corp. All rights reserved.
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2026-5-7 Alex-J First version
*
******************************************************************************/
#ifndef __DRV_ECAP_H__
#define __DRV_ECAP_H__
#include <rtthread.h>
#include <rtdevice.h>
#include <drv_common.h>
#ifdef __cplusplus
extern "C" {
#endif
#define ECAP_DEVICE_NAME_MAX 8U
/*
* control command
*/
#define ECAP_CMD_ENABLE (0x01)
#define ECAP_CMD_DISABLE (0x02)
#define ECAP_CMD_REARM (0x03)
#define ECAP_CMD_GET_LAST_CAPTURE (0x04)
#define ECAP_CMD_SET_CALLBACK (0x05)
#define ECAP_CMD_CLEAR_FLAGS (0x06)
#define ECAP_CMD_ENABLE_IRQ (0x07)
#define ECAP_CMD_DISABLE_IRQ (0x08)
/*
* ECAP capture status
*/
#define ECAP_STATUS_IDLE (0x00U)
#define ECAP_STATUS_DONE (0x01U)
#define ECAP_STATUS_OVERFLOW (0x02U)
#define ECAP_STATUS_CAPTURE (0x04U)
#define ECAP_STATUS_TIMEOUT (0x05U)
/*
* Capture result.
*
* cap1~cap4 对应 ECAP CEVT1~CEVT4 的捕获值。
* period_high / period_low 可根据当前边沿配置计算。
*/
struct rt_ecap_capture
{
rt_uint32_t cap1;
rt_uint32_t cap2;
rt_uint32_t cap3;
rt_uint32_t cap4;
rt_uint32_t period_low;
rt_uint32_t period_high;
rt_uint32_t period_total;
rt_uint32_t status;
};
typedef void (*rt_ecap_rx_callback_t)(struct rt_ecap_capture *capture, void *user_data);
struct rt_ecap_callback
{
rt_ecap_rx_callback_t callback;
void *user_data;
};
/*
* Static ECAP hardware configuration.
*/
struct rt_ecap_config
{
const char *name;
ECAP_TypeDef *instance;
IRQn_Type irq_type;
ECAP_InputCaptureSignals input_signal;
rt_uint32_t input_xbar;
rt_uint32_t input_source;
rt_uint32_t pre_scaler;
GPIO_TypeDef *gpio_port;
GPIO_PinNum gpio_pin;
GPIO_AltFunc gpio_mux;
void (*irq_handler)(void);
};
/*
* ECAP device object.
*/
struct rt_ecap_device
{
struct rt_device parent;
const struct rt_ecap_config *config;
struct rt_mutex lock;
struct rt_semaphore rx_sem;
volatile struct rt_ecap_capture last_capture;
rt_ecap_rx_callback_t rx_callback;
void *rx_user_data;
rt_uint8_t opened;
};
int rt_hw_ecap_init(void);
#ifdef __cplusplus
}
#endif
#endif /* __DRV_USART_H__ */
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