260 lines
6.0 KiB
C
260 lines
6.0 KiB
C
/*
|
|
* drv_i2c.c
|
|
*
|
|
* Created on: Mar 31, 2023
|
|
* Author: gxms0
|
|
*/
|
|
|
|
#include "drv_i2c.h"
|
|
|
|
|
|
|
|
/**********************************************************************
|
|
*@Note:
|
|
AT24Cxx��
|
|
|
|
READ EEPROM��Start + 0xA0 + 8bit Data Address + Start + 0xA1 + Read Data + Stop.
|
|
WRITE EERPOM��Start + 0xA0 + 8bit Data Address + Write Data + Stop.
|
|
*******************************************************************************/
|
|
/* EERPOM DATA ADDRESS Length Definition */
|
|
#define Address_8bit 0
|
|
#define Address_16bit 1
|
|
|
|
/* EERPOM DATA ADDRESS Length Selection */
|
|
#define Address_Lenth Address_16bit
|
|
//#define Address_Lenth Address_16bit
|
|
|
|
/* Global define */
|
|
#define SIZE sizeof(TEXT_Buffer)
|
|
|
|
/* Global Variable */
|
|
const u8 TEXT_Buffer[]={"CH32F10x I2C TEST"};
|
|
|
|
/*********************************************************************
|
|
* @fn IIC_Init
|
|
*
|
|
* @brief Initializes the IIC peripheral.
|
|
*
|
|
* @return none
|
|
*/
|
|
void IIC_Init(u32 bound, u16 address)
|
|
{
|
|
GPIO_InitTypeDef GPIO_InitStructure={0};
|
|
I2C_InitTypeDef I2C_InitTSturcture={0};
|
|
|
|
RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOB, ENABLE );
|
|
RCC_APB1PeriphClockCmd( RCC_APB1Periph_I2C2, ENABLE );
|
|
|
|
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
|
|
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD;
|
|
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
|
|
GPIO_Init( GPIOB, &GPIO_InitStructure );
|
|
|
|
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;
|
|
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD;
|
|
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
|
|
GPIO_Init( GPIOB, &GPIO_InitStructure );
|
|
|
|
I2C_InitTSturcture.I2C_ClockSpeed = bound;
|
|
I2C_InitTSturcture.I2C_Mode = I2C_Mode_I2C;
|
|
I2C_InitTSturcture.I2C_DutyCycle = I2C_DutyCycle_2;
|
|
I2C_InitTSturcture.I2C_OwnAddress1 = address;
|
|
I2C_InitTSturcture.I2C_Ack = I2C_Ack_Enable;
|
|
I2C_InitTSturcture.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
|
|
I2C_Init( I2C2, &I2C_InitTSturcture );
|
|
|
|
I2C_Cmd( I2C2, ENABLE );
|
|
|
|
I2C_AcknowledgeConfig( I2C2, ENABLE );
|
|
}
|
|
|
|
/*********************************************************************
|
|
* @fn AT24CXX_Init
|
|
*
|
|
* @brief Initializes AT24xx EEPROM.
|
|
*
|
|
* @return none
|
|
*/
|
|
void AT24CXX_Init(void)
|
|
{
|
|
IIC_Init( 100000, 0xA0);
|
|
}
|
|
|
|
/*********************************************************************
|
|
* @fn AT24CXX_ReadOneByte
|
|
*
|
|
* @brief Read one data from EEPROM.
|
|
*
|
|
* @param ReadAddr - Read frist address.
|
|
*
|
|
* @return temp - Read data.
|
|
*/
|
|
u8 AT24CXX_ReadOneByte(u16 ReadAddr)
|
|
{
|
|
u8 temp=0;
|
|
|
|
while( I2C_GetFlagStatus( I2C2, I2C_FLAG_BUSY ) != RESET );
|
|
I2C_GenerateSTART( I2C2, ENABLE );
|
|
|
|
while( !I2C_CheckEvent( I2C2, I2C_EVENT_MASTER_MODE_SELECT ) );
|
|
I2C_Send7bitAddress( I2C2, 0XA0, I2C_Direction_Transmitter );
|
|
|
|
while( !I2C_CheckEvent( I2C2, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED ) );
|
|
|
|
#if (Address_Lenth == Address_8bit)
|
|
I2C_SendData( I2C2, (u8)(ReadAddr&0x00FF) );
|
|
while( !I2C_CheckEvent( I2C2, I2C_EVENT_MASTER_BYTE_TRANSMITTED ) );
|
|
|
|
#elif (Address_Lenth == Address_16bit)
|
|
I2C_SendData( I2C2, (u8)(ReadAddr>>8) );
|
|
while( !I2C_CheckEvent( I2C2, I2C_EVENT_MASTER_BYTE_TRANSMITTED ) );
|
|
|
|
I2C_SendData( I2C2, (u8)(ReadAddr&0x00FF) );
|
|
while( !I2C_CheckEvent( I2C2, I2C_EVENT_MASTER_BYTE_TRANSMITTED ) );
|
|
|
|
#endif
|
|
|
|
I2C_GenerateSTART( I2C2, ENABLE );
|
|
|
|
while( !I2C_CheckEvent( I2C2, I2C_EVENT_MASTER_MODE_SELECT ) );
|
|
I2C_Send7bitAddress( I2C2, 0XA0, I2C_Direction_Receiver );
|
|
|
|
while( !I2C_CheckEvent( I2C2, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED ) );
|
|
while( I2C_GetFlagStatus( I2C2, I2C_FLAG_RXNE ) == RESET )
|
|
I2C_AcknowledgeConfig( I2C2, DISABLE );
|
|
|
|
temp = I2C_ReceiveData( I2C2 );
|
|
I2C_GenerateSTOP( I2C2, ENABLE );
|
|
|
|
return temp;
|
|
}
|
|
|
|
/*********************************************************************
|
|
* @fn AT24CXX_WriteOneByte
|
|
*
|
|
* @brief Write one data to EEPROM.
|
|
*
|
|
* @param WriteAddr - Write frist address.
|
|
*
|
|
* @return DataToWrite - Write data.
|
|
*/
|
|
void AT24CXX_WriteOneByte(u16 WriteAddr, u8 DataToWrite)
|
|
{
|
|
while( I2C_GetFlagStatus( I2C2, I2C_FLAG_BUSY ) != RESET );
|
|
I2C_GenerateSTART( I2C2, ENABLE );
|
|
|
|
while( !I2C_CheckEvent( I2C2, I2C_EVENT_MASTER_MODE_SELECT ) );
|
|
I2C_Send7bitAddress( I2C2, 0XA0, I2C_Direction_Transmitter );
|
|
|
|
while( !I2C_CheckEvent( I2C2, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED ) );
|
|
|
|
#if (Address_Lenth == Address_8bit)
|
|
I2C_SendData( I2C2, (u8)(WriteAddr&0x00FF) );
|
|
while( !I2C_CheckEvent( I2C2, I2C_EVENT_MASTER_BYTE_TRANSMITTED ) );
|
|
|
|
#elif (Address_Lenth == Address_16bit)
|
|
I2C_SendData( I2C2, (u8)(WriteAddr>>8) );
|
|
while( !I2C_CheckEvent( I2C2, I2C_EVENT_MASTER_BYTE_TRANSMITTED ) );
|
|
|
|
I2C_SendData( I2C2, (u8)(WriteAddr&0x00FF) );
|
|
while( !I2C_CheckEvent( I2C2, I2C_EVENT_MASTER_BYTE_TRANSMITTED ) );
|
|
|
|
#endif
|
|
|
|
if( I2C_GetFlagStatus( I2C2, I2C_FLAG_TXE ) != RESET )
|
|
{
|
|
I2C_SendData( I2C2, DataToWrite );
|
|
}
|
|
|
|
while( !I2C_CheckEvent( I2C2, I2C_EVENT_MASTER_BYTE_TRANSMITTED ) );
|
|
I2C_GenerateSTOP( I2C2, ENABLE );
|
|
}
|
|
|
|
/*********************************************************************
|
|
* @fn AT24CXX_Read
|
|
*
|
|
* @brief Read multiple data from EEPROM.
|
|
*
|
|
* @param ReadAddr - Read frist address. (AT24c02: 0~255)
|
|
* pBuffer - Read data.
|
|
* NumToRead - Data number.
|
|
*
|
|
* @return none
|
|
*/
|
|
void AT24CXX_Read(u16 ReadAddr, u8 *pBuffer, u16 NumToRead)
|
|
{
|
|
while(NumToRead)
|
|
{
|
|
*pBuffer++=AT24CXX_ReadOneByte(ReadAddr++);
|
|
NumToRead--;
|
|
}
|
|
}
|
|
|
|
/*********************************************************************
|
|
* @fn AT24CXX_Write
|
|
*
|
|
* @brief Write multiple data to EEPROM.
|
|
*
|
|
* @param WriteAddr - Write frist address. (AT24c02: 0~255)
|
|
* pBuffer - Write data.
|
|
* NumToWrite - Data number.
|
|
*
|
|
* @return none
|
|
*/
|
|
void AT24CXX_Write(u16 WriteAddr, u8 *pBuffer, u16 NumToWrite)
|
|
{
|
|
while(NumToWrite--)
|
|
{
|
|
AT24CXX_WriteOneByte(WriteAddr,*pBuffer);
|
|
WriteAddr++;
|
|
pBuffer++;
|
|
Delay_Ms(2);
|
|
}
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|