199 lines
4.8 KiB
C
199 lines
4.8 KiB
C
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/**
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* @file cm_spi.h
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* @brief SPI驱动接口
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* @copyright Copyright @2021 China Mobile IOT. All rights reserved.
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* @author By tw
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* @date 2021/05/18
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*
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* @defgroup spi spi
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* @ingroup PI
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* @{
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*/
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#ifndef __CM_SPI_H__
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#define __CM_SPI_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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/** 时钟频率 *//*仅支持以下时钟频率，不可任意更改*/
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#define CM_SPI_CLK_812_5KHZ (812500U)
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#define CM_SPI_CLK_1_625MHZ (1625000U)
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#define CM_SPI_CLK_3_25MHZ (3250000U)
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#define CM_SPI_CLK_6_5MHZ (6500000U)
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#define CM_SPI_CLK_13MHZ (13000000U)
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#define CM_SPI_CLK_26MHZ (26000000U)
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#define CM_SPI_CLK_52MHZ (52000000U)
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/****************************************************************************
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* Public Types
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****************************************************************************/
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/** 设备ID */
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typedef enum
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{
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CM_SPI_DEV_0, /*!< 设备1*/
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CM_SPI_DEV_1, /*!< 设备2*/
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CM_SPI_DEV_NUM
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} cm_spi_dev_e;
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/** SPI主从模式 */
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typedef enum
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{
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CM_SPI_MODE_SLAVE, /*!< SPI外设从机模式，暂不支持 */
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CM_SPI_MODE_MASTER /*!< SPI外设主机模式*/
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} cm_spi_mode_e;
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/** 模式 */
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typedef enum
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{
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CM_SPI_WOKR_MODE_0 ,/*!< CPOL = 0,CPHA = 0*/
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CM_SPI_WOKR_MODE_1,/*!< CPOL = 0,CPHA = 1*/
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CM_SPI_WOKR_MODE_2 ,/*!< CPOL = 1,CPHA = 0，暂不支持*/
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CM_SPI_WOKR_MODE_3/*!< CPOL = 1,CPHA = 1，暂不支持*/
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} cm_spi_work_mode_e;
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/** SPI传输数据宽度 */
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typedef enum
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{
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CM_SPI_DATA_WIDTH_8BIT,/*!< SPI外设传输数据宽度8位 */
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CM_SPI_DATA_WIDTH_16BIT,/*!< SPI外设传输数据宽度16位，暂不支持 */
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CM_SPI_DATA_WIDTH_32BIT /*!< SPI外设传输数据宽度32位，暂不支持 */
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} cm_spi_data_width_e;
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/** SPI的NSS管理模式 */
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typedef enum
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{
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CM_SPI_NSS_SOFT, /*!< SPI外设软件控制NSS，暂不支持*/
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CM_SPI_NSS_HARD, /*!< SPI外设硬件控制NSS*/
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} cm_spi_nss_e;
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/** 配置 */
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typedef struct
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{
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cm_spi_mode_e mode; /*!< SPI主从模式 */
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cm_spi_work_mode_e work_mode; /*!< 模式 */
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cm_spi_data_width_e data_width; /*!< SPI传输数据宽度 */
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cm_spi_nss_e nss;/*!< SPI的NSS管理模式 */
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int clk; /*!< 时钟频率*/
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} cm_spi_cfg_t;
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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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#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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* @brief spi开启指定通道
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*
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* @param [in] dev spi设备
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* @param [in] config spi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 特别注意：1、ML305A系列暂不支持多路SPI同时使用；
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2、暂不支持SPI模式2和模式3.
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*/
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int32_t cm_spi_open(cm_spi_dev_e dev, cm_spi_cfg_t *cfg);
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/**
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* @brief spi关闭，去初始化
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*
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* @param [in] dev spi设备
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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 More details
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*
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*/
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int32_t cm_spi_close(cm_spi_dev_e dev);
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/**
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* @brief spi写数据
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*
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* @param [in] dev spi设备
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* @param [in] data 待写数据
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* @param [in] len 待写数据长度
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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 More details
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*
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*/
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int32_t cm_spi_write(cm_spi_dev_e dev, const void *data, uint32_t len);
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/**
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* @brief SPI读数据
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*
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* @param [in] dev SPI设备ID
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* @param [out] data 待读数据缓存
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* @param [in] len 长度
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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 More details
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*/
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int32_t cm_spi_read(cm_spi_dev_e dev, void *data, int32_t len);
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/**
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* @brief SPI写数据后读出数据
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*
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* @param [in] dev SPI设备ID
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* @param [in] w_data 待写数据
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* @param [in] w_len 写入长度
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* @param [out] r_data 待读缓存
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* @param [in] r_len 读取长度
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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 More details
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*/
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int32_t cm_spi_write_then_read(cm_spi_dev_e dev, const void *w_data, uint32_t w_len, void *r_data, uint32_t r_len);
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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_SPI_H__ */
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/** @}*/
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