241 lines
8.0 KiB
C
241 lines
8.0 KiB
C
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/**
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* @file cm_uart.h
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* @brief UART接口
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* @copyright Copyright © 2021 China Mobile IOT. All rights reserved.
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* @author By ZHANGXW
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* @date 2021/03/09
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*
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* @defgroup uart uart
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* @ingroup PI
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* @{
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*/
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#ifndef __CM_UART_H__
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#define __CM_UART_H__
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <stdint.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/** 标准波特率 */
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#define CM_UART_BAUDRATE_300 (300U)
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#define CM_UART_BAUDRATE_600 (600U)
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#define CM_UART_BAUDRATE_1200 (1200U)
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#define CM_UART_BAUDRATE_2400 (2400U)
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#define CM_UART_BAUDRATE_4800 (4800U)
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#define CM_UART_BAUDRATE_9600 (9600U)
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#define CM_UART_BAUDRATE_14400 (14400U)
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#define CM_UART_BAUDRATE_19200 (19200U)
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#define CM_UART_BAUDRATE_28800 (28800U)
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#define CM_UART_BAUDRATE_38400 (38400U)
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#define CM_UART_BAUDRATE_57600 (57600U)
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#define CM_UART_BAUDRATE_76800 (76800U)
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#define CM_UART_BAUDRATE_115200 (115200U)
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#define CM_UART_BAUDRATE_230400 (230400U)
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#define CM_UART_BAUDRATE_460800 (460800U)
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#define CM_UART_BAUDRATE_921600 (921600U)
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/** 特殊波特率 */
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/* 注意事项：受分频时钟影响，当某串口配置成某一特殊波特率后，分频时钟即被修改，即之后所有配置成普通模式的串口仅支持该特殊波特率。
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* 配置成低功耗模式的串口采用单独的分频时钟，故不受该影响，即低功耗模式的串口依然可以使用115200及以下的标准波特率(不支持76800)。
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* 若某串口配置成任意特殊波特率后，GNSS功能将无法正常使用。
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* 示例：若某一串口配置成256000波特率的普通模式，则之后所有配置成普通模式的串口仅支持256000波特率，而配置成低功耗模式的串口依然支持115200及以下的标准波特率(不支持76800)。
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*/
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#define CM_UART_BAUDRATE_256000 (256000U)
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#define CM_UART_BAUDRATE_2000000 (2000000U)
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/****************************************************************************
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* Public Types
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****************************************************************************/
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/** 设备ID ，详情参照资源综述*/
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/* FOTA升级期间，可能会有数据从主串口吐出（对应ML307A、ML305A为UART0，ML302A为UART1），用户无需关注该数据，也不应处理该数据 */
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/* 对于ML307A，UART2和GNSS有冲突，两者不可同时使用 */
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typedef enum{
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CM_UART_DEV_0, /*!< 设备0*/
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CM_UART_DEV_1, /*!< 设备1*/
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CM_UART_DEV_2, /*!< 设备2*/
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CM_UART_DEV_NUM
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} cm_uart_dev_e;
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/** 数据位 */
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typedef enum{
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CM_UART_BYTE_SIZE_8 = 8,
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CM_UART_BYTE_SIZE_7 = 7,
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CM_UART_BYTE_SIZE_6 = 6,
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CM_UART_BYTE_SIZE_5 = 5,
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} cm_uart_byte_size_e;
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/** 奇偶校验 */
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typedef enum{
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CM_UART_PARITY_NONE,
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CM_UART_PARITY_ODD,
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CM_UART_PARITY_EVEN,
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CM_UART_PARITY_MARK, /*!< 不支持*/
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CM_UART_PARITY_SPACE /*!< 不支持*/
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} cm_uart_parity_e;
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/** 停止位 */
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typedef enum{
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CM_UART_STOP_BIT_ONE,
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CM_UART_STOP_BIT_ONE_HALF,
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CM_UART_STOP_BIT_TWO
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} cm_uart_stop_bit_e;
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/** 流控制 */
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typedef enum{
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CM_UART_FLOW_CTRL_NONE,
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CM_UART_FLOW_CTRL_HW, /*!< 当前不支持流控*/
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} cm_uart_flow_ctrl_e;
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/** 结果码 */
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typedef enum{
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CM_UART_RET_OK = 0,
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CM_UART_RET_INVALID_PARAM = -1,
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} cm_uart_ret_e;
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/** 配置 */
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typedef struct{
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cm_uart_byte_size_e byte_size; /*!< 数据位，枚举*/
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cm_uart_parity_e parity; /*!< 校验位，枚举*/
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cm_uart_stop_bit_e stop_bit; /*!< 停止位，枚举*/
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cm_uart_flow_ctrl_e flow_ctrl; /*!< 流控制，枚举*/
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int baudrate; /*!< 波特率，支持的波特率见本文件中标准波特率宏定义和特殊波特率宏定义*/
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int is_lpuart; /*!< 1:低功耗串口(仅支持115200以内的标准波特率(不支持76800))；0:普通串口*/
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} cm_uart_cfg_t;
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/** 事件类型 */
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typedef enum
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{
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CM_UART_EVENT_TYPE_RX_ARRIVED = (1 << 0), /*!< 接收到新的数据*/
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CM_UART_EVENT_TYPE_RX_OVERFLOW = (1 << 1), /*!< 接收FIFO缓存溢出*/
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CM_UART_EVENT_TYPE_TX_COMPLETE = (1 << 2)/*!< 不支持发送完成事件*/
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}cm_uart_event_type_e;
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/** 事件 */
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typedef struct{
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uint32_t event_type; /*!< 事件类型，数据可读等*/
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void *event_param; /*!< 事件参数*/
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void *event_entry; /*!< 事件执行入口*/
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} cm_uart_event_t;
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typedef void (*cm_uart_event_cb_t)(void *param, uint32_t evt);
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/****************************************************************************
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* Public Data
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****************************************************************************/
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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/****************************************************************************
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***********************UART使用注意事项*************************************
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* 1、UART引脚和SD卡控制引脚所用PIN脚存在复用关系，若用户使用此PIN脚进行
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* UART功能开发，请阅知cm_sd.h中【SD卡使用注意事项】
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* 2、UART引脚和SD卡控制引脚复用关系见《资源综述》
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***************************************************************************/
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#ifdef __cplusplus
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#define EXTERN extern "C"
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extern "C"
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{
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#else
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#define EXTERN extern
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#endif
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/****************************************************************************/
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/**
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* @brief 打开串口
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*
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* @param [in] dev 串口设备ID
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* @param [in] cfg 串口配置
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*
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* @return
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* = 0 - 成功 \n
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* < 0 - 失败, 返回值为错误码
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*
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* @details open之前必须先对引脚复用功能进行设置。\n
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* 串口支持的波特率及模式见cm_uart_cfg_t结构体注释说明，请详细查看波特率宏定义处的注意事项
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*/
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int32_t cm_uart_open(cm_uart_dev_e dev, cm_uart_cfg_t *cfg);
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/**
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* @brief 注册串口事件
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*
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* @param [in] dev 串口设备ID
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* @param [in] event 串口事件
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*
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* @return
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* = 0 - 成功 \n
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* < 0 - 失败, 返回值为错误码
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*
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* @details 事件包括串口数据可读/溢出等。需在open之前注册。\n
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* 内置4K缓存区保存未读出的数据，若注册了溢出事件，缓存区满后将上报溢出，缓存区溢出状态下将丢弃新接收的数据。\n
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* 回调函数中不可输出LOG、串口打印、执行复杂任务或消耗过多资源。
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*/
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int32_t cm_uart_register_event(cm_uart_dev_e dev, void *event);
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/**
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* @brief 关闭串口
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*
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* @param [in] dev 串口设备ID
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*
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* @return
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* = 0 - 成功 \n
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* < 0 - 失败, 返回值为错误码
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*
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* @details
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*/
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int32_t cm_uart_close(cm_uart_dev_e dev);
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/**
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* @brief 串口写数据
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*
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* @param [in] dev 串口设备ID
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* @param [in] data 待写入数据
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* @param [in] len 长度
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* @param [in] timeout 超时时间(ms)(无效参数)
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*
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* @return
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* = 实际写入长度 - 成功 \n
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* < 0 - 失败, 返回值为错误码
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*
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* @details
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*/
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int32_t cm_uart_write(cm_uart_dev_e dev, const void *data, int32_t len, int32_t timeout);
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/**
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* @brief 串口读数据
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*
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* @param [in] dev 串口设备ID
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* @param [out] data 待读数据
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* @param [in] len 长度
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* @param [in] timeout 超时时间(ms)(无效参数)
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*
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* @return
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* = 实际读出长度 - 成功 \n
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* < 0 - 失败, 返回值为错误码
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*
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* @details
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*/
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int32_t cm_uart_read(cm_uart_dev_e dev, void* data, int32_t len, int32_t timeout);
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#undef EXTERN
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#ifdef __cplusplus
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}
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#endif
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#endif /* __CM_UART_H__ */
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/** @}*/
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