259 lines
7.1 KiB
C
259 lines
7.1 KiB
C
/********************************** (C) COPYRIGHT *******************************
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* File Name : main.c
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* Author : WCH
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* Version : V1.0.0
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* Date : 2021/06/06
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* Description : Main program body.
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*********************************************************************************
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* Copyright (c) 2021 Nanjing Qinheng Microelectronics Co., Ltd.
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* Attention: This software (modified or not) and binary are used for
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* microcontroller manufactured by Nanjing Qinheng Microelectronics.
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*******************************************************************************/
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/*
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*@Note
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*I2C interface routine to operate EEPROM peripheral:
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*I2C1_SCL(PB10)\I2C1_SDA(PB11).
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*This example uses EEPROM for AT24Cxx series.
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*Steps:
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*READ EEPROM:Start + 0xA0 + 8bit Data Address + Start + 0xA1 + Read Data + Stop.
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*WRITE EERPOM:Start + 0xA0 + 8bit Data Address + Write Data + Stop.
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*
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*/
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#include "debug.h"
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/**********************************************************************
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*@Note:
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AT24Cxx£º
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READ EEPROM£ºStart + 0xA0 + 8bit Data Address + Start + 0xA1 + Read Data + Stop.
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WRITE EERPOM£ºStart + 0xA0 + 8bit Data Address + Write Data + Stop.
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*******************************************************************************/
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/* EERPOM DATA ADDRESS Length Definition */
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#define Address_8bit 0
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#define Address_16bit 1
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/* EERPOM DATA ADDRESS Length Selection */
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#define Address_Lenth Address_8bit
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//#define Address_Lenth Address_16bit
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/* Global define */
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#define SIZE sizeof(TEXT_Buffer)
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/* Global Variable */
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const u8 TEXT_Buffer[]={"CH32F10x I2C TEST"};
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/*********************************************************************
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* @fn IIC_Init
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*
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* @brief Initializes the IIC peripheral.
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*
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* @return none
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*/
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void IIC_Init(u32 bound, u16 address)
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{
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GPIO_InitTypeDef GPIO_InitStructure={0};
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I2C_InitTypeDef I2C_InitTSturcture={0};
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RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOB, ENABLE );
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RCC_APB1PeriphClockCmd( RCC_APB1Periph_I2C2, ENABLE );
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD;
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
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GPIO_Init( GPIOB, &GPIO_InitStructure );
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD;
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
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GPIO_Init( GPIOB, &GPIO_InitStructure );
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I2C_InitTSturcture.I2C_ClockSpeed = bound;
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I2C_InitTSturcture.I2C_Mode = I2C_Mode_I2C;
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I2C_InitTSturcture.I2C_DutyCycle = I2C_DutyCycle_2;
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I2C_InitTSturcture.I2C_OwnAddress1 = address;
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I2C_InitTSturcture.I2C_Ack = I2C_Ack_Enable;
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I2C_InitTSturcture.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
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I2C_Init( I2C2, &I2C_InitTSturcture );
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I2C_Cmd( I2C2, ENABLE );
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}
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/*********************************************************************
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* @fn AT24CXX_Init
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*
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* @brief Initializes AT24xx EEPROM.
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*
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* @return none
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*/
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void AT24CXX_Init(void)
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{
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IIC_Init( 100000, 0xA0);
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}
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/*********************************************************************
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* @fn AT24CXX_ReadOneByte
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*
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* @brief Read one data from EEPROM.
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*
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* @param ReadAddr - Read frist address.
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*
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* @return temp - Read data.
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*/
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u8 AT24CXX_ReadOneByte(u16 ReadAddr)
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{
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u8 temp=0;
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while( I2C_GetFlagStatus( I2C2, I2C_FLAG_BUSY ) != RESET );
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I2C_GenerateSTART( I2C2, ENABLE );
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while( !I2C_CheckEvent( I2C2, I2C_EVENT_MASTER_MODE_SELECT ) );
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I2C_Send7bitAddress( I2C2, 0XA0, I2C_Direction_Transmitter );
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while( !I2C_CheckEvent( I2C2, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED ) );
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#if (Address_Lenth == Address_8bit)
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I2C_SendData( I2C2, (u8)(ReadAddr&0x00FF) );
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while( !I2C_CheckEvent( I2C2, I2C_EVENT_MASTER_BYTE_TRANSMITTED ) );
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#elif (Address_Lenth == Address_16bit)
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I2C_SendData( I2C2, (u8)(ReadAddr>>8) );
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while( !I2C_CheckEvent( I2C2, I2C_EVENT_MASTER_BYTE_TRANSMITTED ) );
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I2C_SendData( I2C2, (u8)(ReadAddr&0x00FF) );
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while( !I2C_CheckEvent( I2C2, I2C_EVENT_MASTER_BYTE_TRANSMITTED ) );
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#endif
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I2C_GenerateSTART( I2C2, ENABLE );
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while( !I2C_CheckEvent( I2C2, I2C_EVENT_MASTER_MODE_SELECT ) );
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I2C_Send7bitAddress( I2C2, 0XA0, I2C_Direction_Receiver );
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while( !I2C_CheckEvent( I2C2, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED ) );
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while( I2C_GetFlagStatus( I2C2, I2C_FLAG_RXNE ) == RESET )
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I2C_AcknowledgeConfig( I2C2, DISABLE );
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temp = I2C_ReceiveData( I2C2 );
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I2C_GenerateSTOP( I2C2, ENABLE );
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return temp;
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}
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/*********************************************************************
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* @fn AT24CXX_WriteOneByte
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*
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* @brief Write one data to EEPROM.
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*
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* @param WriteAddr - Write frist address.
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*
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* @return DataToWrite - Write data.
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*/
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void AT24CXX_WriteOneByte(u16 WriteAddr, u8 DataToWrite)
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{
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while( I2C_GetFlagStatus( I2C2, I2C_FLAG_BUSY ) != RESET );
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I2C_GenerateSTART( I2C2, ENABLE );
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while( !I2C_CheckEvent( I2C2, I2C_EVENT_MASTER_MODE_SELECT ) );
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I2C_Send7bitAddress( I2C2, 0XA0, I2C_Direction_Transmitter );
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while( !I2C_CheckEvent( I2C2, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED ) );
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#if (Address_Lenth == Address_8bit)
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I2C_SendData( I2C2, (u8)(WriteAddr&0x00FF) );
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while( !I2C_CheckEvent( I2C2, I2C_EVENT_MASTER_BYTE_TRANSMITTED ) );
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#elif (Address_Lenth == Address_16bit)
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I2C_SendData( I2C2, (u8)(WriteAddr>>8) );
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while( !I2C_CheckEvent( I2C2, I2C_EVENT_MASTER_BYTE_TRANSMITTED ) );
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I2C_SendData( I2C2, (u8)(WriteAddr&0x00FF) );
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while( !I2C_CheckEvent( I2C2, I2C_EVENT_MASTER_BYTE_TRANSMITTED ) );
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#endif
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if( I2C_GetFlagStatus( I2C2, I2C_FLAG_TXE ) != RESET )
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{
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I2C_SendData( I2C2, DataToWrite );
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}
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while( !I2C_CheckEvent( I2C2, I2C_EVENT_MASTER_BYTE_TRANSMITTED ) );
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I2C_GenerateSTOP( I2C2, ENABLE );
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}
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/*********************************************************************
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* @fn AT24CXX_Read
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*
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* @brief Read multiple data from EEPROM.
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*
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* @param ReadAddr - Read frist address. (AT24c02: 0~255)
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* pBuffer - Read data.
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* NumToRead - Data number.
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*
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* @return none
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*/
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void AT24CXX_Read(u16 ReadAddr, u8 *pBuffer, u16 NumToRead)
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{
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while(NumToRead)
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{
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*pBuffer++=AT24CXX_ReadOneByte(ReadAddr++);
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NumToRead--;
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}
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}
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/*********************************************************************
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* @fn AT24CXX_Write
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*
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* @brief Write multiple data to EEPROM.
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*
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* @param WriteAddr - Write frist address. (AT24c02: 0~255)
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* pBuffer - Write data.
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* NumToWrite - Data number.
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*
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* @return none
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*/
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void AT24CXX_Write(u16 WriteAddr, u8 *pBuffer, u16 NumToWrite)
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{
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while(NumToWrite--)
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{
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AT24CXX_WriteOneByte(WriteAddr,*pBuffer);
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WriteAddr++;
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pBuffer++;
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Delay_Ms(2);
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}
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}
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/*********************************************************************
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* @fn main
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*
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* @brief Main program.
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*
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* @return none
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*/
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int main(void)
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{
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u8 data[SIZE];
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SystemCoreClockUpdate();
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Delay_Init();
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USART_Printf_Init(115200);
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printf("SystemClk:%d\r\n",SystemCoreClock);
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printf( "ChipID:%08x\r\n", DBGMCU_GetCHIPID() );
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AT24CXX_Init();
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printf("Start Write 24Cxx....\r\n");
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AT24CXX_Write(100,(u8*)TEXT_Buffer,SIZE);
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printf("24Cxx Write Sucess!\r\n");
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Delay_Ms(500);
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printf("Start Read 24Cxx....\r\n");
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AT24CXX_Read(100,data,SIZE);
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printf("The Data Readed Is: \r\n");
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printf("%s\r\n", data);
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while(1);
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}
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