166 lines
4.9 KiB
C
166 lines
4.9 KiB
C
// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef _DRIVER_I2C_H_
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#define _DRIVER_I2C_H_
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include "esp_types.h"
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#include "soc/i2c_reg.h"
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#include "soc/soc.h"
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#include "soc/dport_reg.h"
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#define I2C_DEV(i) ((i2c_dev_t *)(REG_I2C_BASE(i)))
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#define I2C_APB_CLK_FREQ APB_CLK_FREQ
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#define I2C_COMD_REG(i2c_no, cmd_no) (I2C_COMD0_REG(i2c_no)+ (cmd_no)*4 )
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#define I2C_COMMAND_DONE (BIT(31))
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#define I2C_COMMAND_DONE_M (BIT(31))
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#define I2C_COMMAND_DONE_V 0x1
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#define I2C_COMMAND_DONE_S 31
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#define I2C_COMMAND_OP_CODE 0x7
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#define I2C_COMMAND_OP_CODE_M ((I2C_COMMAND_OP_CODE_V)<<(I2C_COMMAND_OP_CODE_S))
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#define I2C_COMMAND_OP_CODE_V 0x7
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#define I2C_COMMAND_OP_CODE_S 11
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#define I2C_COMMAND_ACK_VALUE (BIT(10))
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#define I2C_COMMAND_ACK_VALUE_M (BIT(10))
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#define I2C_COMMAND_ACK_VALUE_V 0x1
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#define I2C_COMMAND_ACK_VALUE_S 10
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#define I2C_COMMAND_ACK_EXP (BIT(9))
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#define I2C_COMMAND_ACK_EXP_M (BIT(9))
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#define I2C_COMMAND_ACK_EXP_V 0x1
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#define I2C_COMMAND_ACK_EXP_S 9
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#define I2C_COMMAND_ACK_EN (BIT(8))
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#define I2C_COMMAND_ACK_EN_M (BIT(8))
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#define I2C_COMMAND_ACK_EN_V 0x1
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#define I2C_COMMAND_ACK_EN_S 8
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#define I2C_COMMAND_BYTE_NUM 0xff
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#define I2C_COMMAND_BYTE_NUM_M 0xff
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#define I2C_COMMAND_BYTE_NUM_V 0xff
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#define I2C_COMMAND_BYTE_NUM_S 0
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typedef enum{
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I2C_SLAVE_MODE = 0,
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I2C_MASTER_MODE,
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}enum_i2c_mode_t;
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typedef enum{
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I2C_CMD_RESTART = 0,
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I2C_CMD_WRITE,
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I2C_CMD_READ,
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I2C_CMD_STOP,
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I2C_CMD_END
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}enum_cmd_opcode_t;
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typedef enum{
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I2C0 = 0, // 0x3ff53000
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I2C1 , // 0x3ff67000
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I2C_MAX
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} enum_i2c_port_t;
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typedef struct{
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enum_i2c_mode_t mode;
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uint8_t addr_10bit_en;
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uint16_t slave_addr;
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uint32_t clk_speed;
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}i2c_config_t;
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typedef struct{
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uint8_t byte_num;
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uint8_t ack_en;
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uint8_t ack_exp;
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uint8_t ack_val;
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enum_cmd_opcode_t op_code;
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}i2c_cmd_def_t;
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/**
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* @brief Reset I2C tx fifo, flush the data in tx fifo.
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*
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* @param enum_i2c_port_t i2c_no : I2C port num (I2C0 or I2C1)
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*
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* @return null
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*/
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void i2c_reset_tx_fifo(enum_i2c_port_t i2c_no );
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/**
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* @brief Fill the tx fifo with the given data bytes
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*
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* @param enum_i2c_port_t i2c_no : I2C port num (I2C0 or I2C1)
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* @param uint8_t *data : pointer to the data buffer
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* @param uint8_t len : data length of the data
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*
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* @return null
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*/
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void i2c_tx_fifo_push(enum_i2c_port_t i2c_no,uint8_t *data , uint8_t len);
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/**
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* @brief Reset I2C rx fifo, flush the data in rx fifo.
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*
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* @param enum_i2c_port_t i2c_no : I2C port num (I2C0 or I2C1)
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*
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* @return null
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*/
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void i2c_reset_rx_fifo(enum_i2c_port_t i2c_no);
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/**
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* @brief Fill the tx fifo with the given data bytes
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*
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* @param enum_i2c_port_t i2c_no : I2C port num (I2C0 or I2C1)
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* @param uint8_t cmd_idx : i2c command index(at most 16 commands one time)
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* @param i2c_cmd_def_t* cmd : command definition.
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*
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* @return null
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*/
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void i2c_config_cmd(enum_i2c_port_t i2c_no,uint8_t cmd_idx, i2c_cmd_def_t* cmd);
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/**
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* @brief Start sending data to i2c bus.The data is defined in the command registers.Stop when there is a "STOP" command
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*
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* @param enum_i2c_port_t i2c_no : I2C port num (I2C0 or I2C1)
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*
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* @return null
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*/
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void i2c_start(enum_i2c_port_t i2c_no);
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/**
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* @brief Set and initialize i2c params
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*
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* @param enum_i2c_port_t i2c_no : I2C port num (I2C0 or I2C1)
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* @param i2c_config_t* i2c_conf : i2c setting param struct
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*
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* @return null
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*/
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void i2c_init( enum_i2c_port_t i2c_no, i2c_config_t* i2c_conf);
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/**
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* @brief Set and initialize i2c interruption handler
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*
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* @param uint8_t cpu_num : CPU number (PRO_CPU_NUM or APP_CPU_NUM)
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* @param enum_i2c_port_t i2c_no : I2C port num (I2C0 or I2C1)
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* @param uint8_t i2c_intr_num : i2c interrupt number, set this value according to interrupt cpu using table, Please see the core-isa.h
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* @param void (* fn)(void* ) : i2c interrupt handler
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* @param void * arg : param pointer of i2c interrupt handler
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*
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* @return null
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*/
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void i2c_intr_register(uint8_t cpu_num,enum_i2c_port_t i2c_no,uint8_t i2c_intr_num,void (* fn)(void* ),void * arg);
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#ifdef __cplusplus
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}
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#endif
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#endif /*_DRIVER_I2C_H_*/
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