79 lines
3.1 KiB
C
79 lines
3.1 KiB
C
#ifndef __TCA9555_H__
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#define __TCA9555_H__
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#include "main.h"
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#include "lib.h"
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#define TCA9555_ADDRESS 0x20 /*!< I2C Address */
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/************************** I2C Registers *************************************/
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typedef enum
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{
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TCA9555_INPUT_REG0 = 0x00, /*!< 输入状态寄存器 */
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TCA9555_INPUT_REG1 = 0x01, /*!< 输入状态寄存器 */
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TCA9555_OUTPUT_REG0 = 0x02, /*!< 输出寄存器以更改输出状态的位。设置为1时，设置为高电平 */
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TCA9555_OUTPUT_REG1 = 0x03, /*!< 输出寄存器以更改输出状态的位。设置为1时，设置为高电平 */
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TCA9555_POLARITY_REG0 = 0x04, /*!< 极性反转寄存器。位'1'在寄存器0x00上反转输入极性 */
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TCA9555_POLARITY_REG1 = 0x05, /*!< 极性反转寄存器。位'1'在寄存器0x00上反转输入极性 */
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TCA9555_CONFIG_REG0 = 0x06, /*!< 配置寄存器。位'1'设置为输入，位'0'设置为输出 */
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TCA9555_CONFIG_REG1 = 0x07 /*!< 配置寄存器。位'1'设置为输入，位'0'设置为输出 */
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} tca9555_reg_t;
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#define CONFIG_INPUT_VAL 0xFF
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#define CONFIG_OUTPUT_VAL 0x00
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#define WRITE_ADDRESS ((TCA9555_ADDRESS << 1) | 0) /*!< I2C主设备写入 */
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#define READ_ADDRESS ((TCA9555_ADDRESS << 1) | 1) /*!< I2C主设备读取 */
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#define ACK_CHECK_EN 0x1 /*!< I2C主设备检查从设备ACK */
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#define ACK_CHECK_DIS 0x0 /*!< I2C主设备不检查从设备ACK */
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#define ACK_VAL 0x0 /*!< I2C从设备ACK值 */
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#define NACK_VAL 0x1 /*!< I2C从设备NACK值 */
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struct tca9555_sbit
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{
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uint8_t b0 : 1;
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uint8_t b1 : 1;
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uint8_t b2 : 1;
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uint8_t b3 : 1;
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uint8_t b4 : 1;
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uint8_t b5 : 1;
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uint8_t b6 : 1;
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uint8_t b7 : 1;
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};
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union tca9555_uinputport
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{
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uint8_t asint; /*!< port data as unsigned integer */
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struct tca9555_sbit bit; /*!< port data as separate bits */
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};
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struct tca9555_sregister
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{
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union tca9555_uinputport p0;
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union tca9555_uinputport p1;
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};
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typedef union
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{
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uint16_t asint; /*!< register data as unsigned integer */
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struct tca9555_sregister port; /*!< register data as separate ports */
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} tca9555_register;
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void tca9555_init(void); // 初始化i2c总线
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void tca9555_configure_input(tca9555_register *reg, uint8_t port, uint8_t pin); // 配置输入
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uint8_t tca9555_read_single_register(tca9555_reg_t address); // 读取单个寄存器
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void tca9555_write_single_register(tca9555_reg_t address, uint8_t reg_val); // 写入单个寄存器
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void tca9555_read_struct(tca9555_register *reg, tca9555_reg_t reg_num); // 读取结构体
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void tca9555_write_struct(tca9555_register *reg, tca9555_reg_t reg_num); // 写入结构体
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void tca9555_write_output(tca9555_register *reg);
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void tca9555_write_polarity(tca9555_register *reg);
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void tca9555_write_config(tca9555_register *reg);
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void tca9555_read_input(tca9555_register *reg);
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void tca9555_read_output(tca9555_register *reg);
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void tca9555_read_polarity(tca9555_register *reg);
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void tca9555_read_config(tca9555_register *reg);
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#endif // __TCA9555_H__
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