3d9d6198c8
How To Run:
see TencentOS-tiny\board\ALPHA_I.MX_emmc_256ddr\README.md
TODO Next:
1. VFP support
2. fault diagnosis support
3. qemu vexpress ca9 support
4. raspberry pi support
5. SMP support
62 lines
1.9 KiB
C
62 lines
1.9 KiB
C
#ifndef _BSP_I2C_H
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#define _BSP_I2C_H
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/***************************************************************
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Copyright © zuozhongkai Co., Ltd. 1998-2019. All rights reserved.
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文件名 : bsp_i2c.c
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作者 : 左忠凯
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版本 : V1.0
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描述 : IIC驱动文件。
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其他 : 无
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论坛 : www.openedv.com
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日志 : 初版V1.0 2019/1/15 左忠凯创建
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***************************************************************/
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#include "bsp.h"
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/* 相关宏定义 */
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#define I2C_STATUS_OK (0)
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#define I2C_STATUS_BUSY (1)
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#define I2C_STATUS_IDLE (2)
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#define I2C_STATUS_NAK (3)
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#define I2C_STATUS_ARBITRATIONLOST (4)
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#define I2C_STATUS_TIMEOUT (5)
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#define I2C_STATUS_ADDRNAK (6)
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/*
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* I2C方向枚举类型
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*/
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enum i2c_direction
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{
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kI2C_Write = 0x0, /* 主机向从机写数据 */
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kI2C_Read = 0x1, /* 主机从从机读数据 */
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} ;
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/*
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* 主机传输结构体
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*/
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struct i2c_transfer
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{
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unsigned char slaveAddress; /* 7位从机地址 */
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enum i2c_direction direction; /* 传输方向 */
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unsigned int subaddress; /* 寄存器地址 */
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unsigned char subaddressSize; /* 寄存器地址长度 */
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unsigned char *volatile data; /* 数据缓冲区 */
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volatile unsigned int dataSize; /* 数据缓冲区长度 */
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};
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/*
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*函数声明
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*/
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void i2c_init(I2C_Type *base);
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unsigned char i2c_master_start(I2C_Type *base, unsigned char address, enum i2c_direction direction);
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unsigned char i2c_master_repeated_start(I2C_Type *base, unsigned char address, enum i2c_direction direction);
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unsigned char i2c_check_and_clear_error(I2C_Type *base, unsigned int status);
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unsigned char i2c_master_stop(I2C_Type *base);
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void i2c_master_write(I2C_Type *base, const unsigned char *buf, unsigned int size);
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void i2c_master_read(I2C_Type *base, unsigned char *buf, unsigned int size);
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unsigned char i2c_master_transfer(I2C_Type *base, struct i2c_transfer *xfer);
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#endif
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