194 lines
4 KiB
C
194 lines
4 KiB
C
#ifndef __I2C_MASTER_H__
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#define __I2C_MASTER_H__
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#include <stdio.h>
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#include "driver/gpio.h"
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#include "esp_types.h"
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#include "rom/ets_sys.h"
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#if 0
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#define I2C_MASTER_SDA_MUX PERIPHS_IO_MUX_MTMS_U
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#define I2C_MASTER_SCL_MUX PERIPHS_IO_MUX_MTDO_U
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#define I2C_MASTER_SDA_GPIO 14
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#define I2C_MASTER_SCL_GPIO 15
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#define I2C_MASTER_SDA_FUNC FUNC_MTMS_GPIO14
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#define I2C_MASTER_SCL_FUNC FUNC_MTDO_GPIO15
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#endif
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#if 0
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#define I2C_MASTER_SDA_MUX PERIPHS_IO_MUX_GPIO26_U
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#define I2C_MASTER_SCL_MUX PERIPHS_IO_MUX_GPIO27_U
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#define I2C_MASTER_SDA_GPIO 26
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#define I2C_MASTER_SDA_PIN GPIO_Pin_26
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#define I2C_MASTER_SCL_PIN GPIO_Pin_27
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#define I2C_MASTER_SCL_GPIO 27
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#define I2C_MASTER_SDA_FUNC FUNC_GPIO26_GPIO26
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#define I2C_MASTER_SCL_FUNC FUNC_GPIO27_GPIO27
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#endif
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#if 1
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#define I2C_MASTER_SDA_GPIO 21
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#define I2C_MASTER_SDA_PIN GPIO_SEL_21
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#define I2C_MASTER_SCL_PIN GPIO_SEL_19
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#define I2C_MASTER_SCL_GPIO 19
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#endif
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#if 0
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#define I2C_MASTER_SDA_MUX PERIPHS_IO_MUX_GPIO23_U
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#define I2C_MASTER_SCL_MUX PERIPHS_IO_MUX_GPIO5_U
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#define I2C_MASTER_SDA_GPIO 23
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#define I2C_MASTER_SDA_PIN GPIO_Pin_23
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#define I2C_MASTER_SCL_PIN GPIO_Pin_5
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#define I2C_MASTER_SCL_GPIO 5
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#define I2C_MASTER_SDA_FUNC FUNC_GPIO23_GPIO23
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#define I2C_MASTER_SCL_FUNC FUNC_GPIO5_GPIO5
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#endif
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#define I2C_MASTER_SDA_HIGH_SCL_HIGH() \
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gpio_set_level(I2C_MASTER_SDA_GPIO,1);\
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gpio_set_level(I2C_MASTER_SCL_GPIO,1);
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#define I2C_MASTER_SDA_HIGH_SCL_LOW() \
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gpio_set_level(I2C_MASTER_SDA_GPIO,1);\
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gpio_set_level(I2C_MASTER_SCL_GPIO,0);
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#define I2C_MASTER_SDA_LOW_SCL_HIGH() \
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gpio_set_level(I2C_MASTER_SDA_GPIO,0);\
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gpio_set_level(I2C_MASTER_SCL_GPIO,1);
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#define I2C_MASTER_SDA_LOW_SCL_LOW() \
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gpio_set_level(I2C_MASTER_SDA_GPIO,0);\
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gpio_set_level(I2C_MASTER_SCL_GPIO,0);
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/** \defgroup Driver_APIs Driver APIs
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* @brief Driver APIs
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*/
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/** @addtogroup Driver_APIs
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* @{
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*/
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/** \defgroup I2C_Driver_APIs I2C_MASTER Driver APIs
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* @brief UART driver APIs
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*/
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/** @addtogroup I2C_MASTER_Driver_APIs
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* @{
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*/
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/**
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* @brief i2c_master_gpio_init,config SDA and SCL gpio to open-drain output mode.
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*
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* @param null
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*
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* @return null
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*/
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void i2c_master_gpio_init(void);
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/**
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* @brief i2c_master_gpio_init,config SDA and SCL gpio to open-drain output mode.
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*
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* @param initilize I2C bus to enable i2c operations.
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*
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* @return null
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*/
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void i2c_master_init(void);
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#define i2c_master_wait ets_delay_us
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/**
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* @brief i2c_master_gpio_init,config SDA and SCL gpio to open-drain output mode.
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*
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* @param set i2c to stop sending state.
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*
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* @return null
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*/
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void i2c_master_stop(void);
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/**
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* @brief i2c_master_gpio_init,config SDA and SCL gpio to open-drain output mode.
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*
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* @param set i2c to start sending state.
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*
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* @return null
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*/
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void i2c_master_start(void);
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/**
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* @brief i2c_master_gpio_init,config SDA and SCL gpio to open-drain output mode.
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*
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* @param set ack to i2c bus as level value.
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*
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* @return null
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*/
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void i2c_master_setAck(uint8_t level);
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/**
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* @brief confirm if peer send ack.
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*
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* @param null
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*
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* @return null
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*/
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uint8_t i2c_master_getAck(void);
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/**
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* @brief read Byte from i2c bus.
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*
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* @param null
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*
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* @return the byte which read from i2c bus.
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*/
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uint8_t i2c_master_readByte(void);
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/**
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* @brief write wrdata value(one byte) into i2c.
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*
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* @param uint8_t wrdata:write value
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*
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* @return null
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*/
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void i2c_master_writeByte(uint8_t wrdata);
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/**
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* @brief i2c_master_checkAck.
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*
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* @param null
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*
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* @return the result of check ack
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*/
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bool i2c_master_checkAck(void);
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/**
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* @brief i2c master send Ack.
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*
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* @param null
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*
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* @return null
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*/
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void i2c_master_send_ack(void);
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/**
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* @brief i2c master send Nack.
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*
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* @param null
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*
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* @return null
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*/
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void i2c_master_send_nack(void);
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/**
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* @}
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*/
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/**
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* @}
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*/
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#endif
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