FRAM铁电存储器FM25W256 | FM24CL04B | FM24CL16B编程实现读写存取数据

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STM32 SPI调试外部RAM FM25L04B - 4Kb 3V SPI F-RAM----------512*8bit 存储器地址范围00000H~1FFH，共4Kb(512* 8)bit， FM25V20A - 2MbitF-RAM （Upto 40MHz）--------（256K * 8） 存储器地址范围00000H~3FFFFH，共2Mbit (256k * 8)bit，其中256k即为 256 * 1024 = 262144 个byte（0x4 00 00，因此存储器最后字节为0x3 ff ff）... 阅读详情

AI摘要

本文详细介绍了FRAM存储器通过SPI与I2C接口进行读写操作的方法，包括电路设计、SPI配置及命令解析，并提供了STM32与ESP8266平台上的具体实现代码。

【本文发布于https://blog.youkuaiyun.com/Stack_/article/details/116353030，未经许可不得转载，转载须注明出处】

FM25W256

一、电路

在这里插入图片描述

二、配置SPI（GD32F303）

@ 优快云 Tyrion.Mon
/**
  * @brief  初始化SPI1
  * @note   SPI1_NSS -- PB12
  *         SPI1_SCK -- PB13
  *         SPI1_MI  -- PB14
  *         SPI1_MO  -- PB15
  * @param  None
  * @retval None
  * @author PWH     @ 优快云 Tyrion.Mon
  * @date   2021/3
  */
void SPI1_Init(void)
{
	RCU->RCU_APB1EN.Bits.SPI1EN = 1;			//
	
	/* SCK复用输出 */
	Gd32f30x_Gpio_Init(GPIO_PB13, GPIO_MODE_OUT_50MHZ, GPIO_CTL_AF_PP);
	/* MI上拉输入 */
	Gd32f30x_Gpio_Init(GPIO_PB14, GPIO_MODE_IN, GPIO_CTL_IPU);
	/* MO复用输出 */
	Gd32f30x_Gpio_Init(GPIO_PB15, GPIO_MODE_OUT_50MHZ, GPIO_CTL_AF_PP);
	
	/* SPI1 */
	//1：主机模式
	SPI1->SPI_CTL0.Bits.MSTMOD = 1;
	//0： 2 线单向传输模式
	SPI1->SPI_CTL0.Bits.BDEN = 0;
	//0：全双工模式(当 BDEN 清零时)
	SPI1->SPI_CTL0.Bits.RO = 0;
	//0： 8 位数据帧格式
	SPI1->SPI_CTL0.Bits.FF16 = 0;
	//1： NSS 软件模式， NSS 电平取决于 SWNSS 位
	SPI1->SPI_CTL0.Bits.SWNSSEN = 1;
	SPI1->SPI_CTL0.Bits.SWNSS = 1;
	//SPI1时钟来源：APB1   psc=001 : 4分频  FRAM spi最高20M
	SPI1->SPI_CTL0.Bits.PSC = 1;
	//0：先发送最高有效位
	SPI1->SPI_CTL0.Bits.LF = 0;
	//1： SPI 为空闲状态时， CLK 引脚拉低，此时fram spi工作在mode0
	SPI1->SPI_CTL0.Bits.CKPL = 0;
	//0：在第一个时钟跳变沿采集第一个数据
	SPI1->SPI_CTL0.Bits.CKPH = 0;
	//1： RBNE 中断使能。当 RBNE 置位时，产生中断。
//	SPI1->SPI_CTL1.Bits.RBNEIE = 1;
	//1： SPI 设备使能
	SPI1->SPI_CTL0.Bits.SPIEN = 1;
}

三、命令字

在这里插入图片描述

所有写操作前都必须先发送WREN以使能写操作。

@ 优快云 Tyrion.Mon
/**
  * @brief  使能/使能写操作
  * @note   
  * @param  ENABLE 允许；DISABLE 禁止
  * @retval None
  * @author PWH @ 优快云 Tyrion.Mon
  * @date   2021/3
  */
static void FRAM_WriteEnable(uint8_t EN_DISEN)
{
	FRAM_Select(CS_ENABLE);
	if (EN_DISEN == ENABLE)
		SPIx_SendData(SPI1, WREN);	//使能写操作（WREN操作码使WEL置位，允许写操作）
	else
		SPIx_SendData(SPI1, WRDI);
	FRAM_Select(CS_DISABLE);
}

四、读写

读写状态寄存器

@ 优快云 Tyrion.Mon
/**
  * @brief  读状态寄存器数据
  * @note   
  * @param  NONE
  * @retval 状态寄存器值 
  * @author PWH@ 优快云 Tyrion.Mon
  * @date   2021/3
  */
static uint8_t FRAM_ReadSR(void)
{
	uint8_t ret;
	FRAM_Select(CS_ENABLE);
	SPIx_SendData(SPI1, RDSR);
	ret = SPIx_SendData(SPI1, 0x00);
	FRAM_Select(CS_DISABLE);
	return ret;
}

/**
  * @brief  写状态寄存器
  * @note   
  * @param  状态寄存器值
  * @retval NONE
  * @author PWH @ 优快云 Tyrion.Mon
  * @date   2021/3
  */
static void FRAM_WriteSR(uint8_t val)
{
	FRAM_WriteEnable(ENABLE);	//写SR前需要使能写操作
	
	FRAM_Select(CS_ENABLE);
	SPIx_SendData(SPI1, WRSR);
	SPIx_SendData(SPI1, val);
	FRAM_Select(CS_DISABLE);
}

读写存储块

/**
  * @brief  FRAM
  * @note   
  * @param  None
  * @retval None
  * @author PWH@ 优快云 Tyrion.Mon
  * @date   2021/3
  */
uint16_t FRAM_Write(uint16_t AddrOffset, uint8_t *Data, uint16_t DataLen)
{
	if ((!DataLen) || (AddrOffset > FRAM_ADDR_MAX) || ((AddrOffset + DataLen - 1) > FRAM_ADDR_MAX))
		return 0;
	
	FRAM_WriteSR(0x80);			//写SR寄存器,所有存储块取消写保护
	
	FRAM_WriteEnable(ENABLE);	//写存储块前需要使能写操作

	FRAM_Select(CS_ENABLE);
	
	SPIx_SendData(SPI1, WRITE);								//写指令
	SPIx_SendData(SPI1, (AddrOffset >> 8) & 0x00ff);		//写入起始地址高字节
	SPIx_SendData(SPI1, AddrOffset & 0x00ff);				//写入起始地址低字节
	
	do {
		SPIx_SendData(SPI1, *Data++);
	} while (--DataLen);
	
	FRAM_Select(CS_DISABLE);
	
	FRAM_WriteSR(0x8C);			//写SR寄存器,所有存储块使能写保护

	return 1;
}

/**
  * @brief  FRAM
  * @note   
  * @param  None
  * @retval Noned
  * @author PWH @ 优快云 Tyrion.Mon
  * @date   2021/3
  */
uint16_t FRAM_Read(uint16_t AddrOffset, uint8_t *Data, uint16_t DataLen)
{
	if ((!DataLen) || (AddrOffset > FRAM_ADDR_MAX) || ((AddrOffset + DataLen - 1) > FRAM_ADDR_MAX))
		return 0;
	
	FRAM_Select(CS_ENABLE);
	
	SPIx_SendData(SPI1, READ);								//读指令
	SPIx_SendData(SPI1, (AddrOffset >> 8) & 0x00ff);		//写入起始地址高字节
	SPIx_SendData(SPI1, AddrOffset & 0x00ff);				//写入起始地址低字节
	
	do {
		*Data++ = SPIx_SendData(SPI1, 0x00);
	} while (--DataLen);
	
	FRAM_Select(CS_DISABLE);
	
	return 1;
}

FM24CL04B/FM24CL16B

一、电路

在这里插入图片描述

/*
 * FM24CL04B
 * 1    0    1    0    A2    A1    A0    R/W
 *
 * A2 A1 已硬件拉低， A0作页选择
 *
 * FM24CL16B
 * 1    0    1    0    A2    A1    A0    R/W
 *
 * 外部无地址选择引脚，A2 A1 A0作页选择
 *
 */

二、I2C驱动（软 – ESP8266）

@ 优快云 Tyrion.Mon

#define I2C_MASTER_SCL_PIN			GPIO_Pin_5
#define I2C_MASTER_SCL_NUM			GPIO_NUM_5
#define I2C_MASTER_SCL_MODE			GPIO_MODE_OUTPUT_OD

#define I2C_MASTER_SDA_PIN			GPIO_Pin_4
#define I2C_MASTER_SDA_NUM			GPIO_NUM_4
#define I2C_MASTER_SDA_MODE			GPIO_MODE_OUTPUT_OD

#define I2C_MASTER_SCL_CLR() 		gpio_set_level(I2C_MASTER_SCL_NUM, 0)//i2c scl
#define I2C_MASTER_SCL_SET() 		gpio_set_level(I2C_MASTER_SCL_NUM, 1)

#define I2C_MASTER_SDA_CLR() 		gpio_set_level(I2C_MASTER_SDA_NUM, 0)//i2c sda
#define I2C_MASTER_SDA_SET() 		gpio_set_level(I2C_MASTER_SDA_NUM, 1)


//延时
void I2C_Master_delay(void)
{
	uint8_t t = 1;
	while (t--);
}
//SDA配置为输出
void I2C_Master_SDA_PIN_OUTPUT(void)
{
#if 0
	gpio_config_t gpio_cfg = {
		.pin_bit_mask = I2C_MASTER_SDA_PIN,
		.mode = GPIO_MODE_OUTPUT_OD,
		.pull_up_en = 0,
		.pull_down_en = 0,
		.intr_type = GPIO_INTR_DISABLE,
	};
	gpio_config(&gpio_cfg);
#else
	gpio_set_direction(I2C_MASTER_SDA_NUM, GPIO_MODE_OUTPUT_OD);
#endif
}
//SDA配置为输入
void I2C_Master_SDA_PIN_INPUT(void)
{
#if 0
	gpio_config_t gpio_cfg = {
		.pin_bit_mask = I2C_MASTER_SDA_PIN,
		.mode = GPIO_MODE_INPUT,
		.pull_up_en = 0,
		.pull_down_en = 0,
		.intr_type = GPIO_INTR_DISABLE,
	};
	gpio_config(&gpio_cfg);
#else
	gpio_set_direction(I2C_MASTER_SDA_NUM, GPIO_MODE_INPUT);
#endif
}
//读取SDA输入电平
uint8_t I2C_Master_SDA_PIN_GET(void)
{
	return gpio_get_level(I2C_MASTER_SDA_NUM);
}
//起始信号
void I2C_Master_Start(void)
{
	I2C_Master_SDA_PIN_OUTPUT();
	I2C_MASTER_SDA_SET();
	I2C_MASTER_SCL_SET();
	I2C_Master_delay();
	I2C_MASTER_SDA_CLR();
	I2C_Master_delay();
	I2C_MASTER_SCL_CLR();
	I2C_Master_delay();
}
//结束信号
void I2C_Master_Stop(void)
{
	I2C_Master_SDA_PIN_OUTPUT();
	I2C_MASTER_SDA_CLR();
	I2C_MASTER_SCL_SET();
	I2C_Master_delay();
	I2C_MASTER_SDA_SET();
}
//发送ack
void I2C_Master_Ack(void)
{
	I2C_Master_SDA_PIN_OUTPUT();
	I2C_MASTER_SDA_CLR();
	I2C_MASTER_SCL_SET();
	I2C_Master_delay();
	I2C_MASTER_SCL_CLR();
	I2C_Master_delay();
}
//发送nack
void I2C_Master_NAck(void)
{
	I2C_Master_SDA_PIN_OUTPUT();
	I2C_MASTER_SDA_SET();
	I2C_MASTER_SCL_SET();
	I2C_Master_delay();
	I2C_MASTER_SCL_CLR();
	I2C_Master_delay();
}
//等待信号响应
uint8_t I2C_Master_WaitAck(void) //测数据信号的电平
{
	uint8_t ack;
	I2C_Master_SDA_PIN_INPUT();
	//I2C_MASTER_SDA_SET();
	//I2C_Master_delay();
	I2C_MASTER_SCL_SET();
	ack = I2C_Master_SDA_PIN_GET();
	I2C_Master_delay();
	I2C_MASTER_SCL_CLR();
	I2C_Master_delay();
	return ack;
}
//写入一个字节
void I2C_Master_Send_Byte(uint8_t dat)
{
	uint8_t i;
	I2C_Master_SDA_PIN_OUTPUT();
	for(i = 0; i < 8; i++)
	{
		if(dat & 0x80)//将dat的8位从最高位依次写入
		{
			I2C_MASTER_SDA_SET();
        }
		else
		{
			I2C_MASTER_SDA_CLR();
        }
		I2C_Master_delay();
		I2C_MASTER_SCL_SET();
		I2C_Master_delay();
		I2C_MASTER_SCL_CLR();//将时钟信号设置为低电平
		dat <<= 1;
    }
}
//写入一个字节
void I2C_Master_Send_1Byte(uint8_t slave_addr, uint8_t reg_address, uint8_t dat)
{

	I2C_Master_Start();
	I2C_Master_Send_Byte(slave_addr);
	I2C_Master_WaitAck();
	I2C_Master_Send_Byte(reg_address);
	I2C_Master_WaitAck();
	I2C_Master_Send_Byte(dat);
	I2C_Master_WaitAck();
	I2C_Master_Stop();
}
//写入n个字节
void I2C_Master_Send_Bytes(uint8_t slave_addr, uint8_t reg_address, uint8_t *dat, uint16_t len)
{
	uint16_t i = 0;

	I2C_Master_Start();
	I2C_Master_Send_Byte(slave_addr);
	I2C_Master_WaitAck();
	I2C_Master_Send_Byte(reg_address);
	I2C_Master_WaitAck();

	for (i = 0; i < len; i++)
	{
		I2C_Master_Send_Byte(dat[i++]);
		I2C_Master_WaitAck();
	}

	I2C_Master_Stop();
}
//读一个字节
void I2C_Master_Read_Byte(uint8_t *dat)
{
	uint8_t i;
	*dat = 0;
	I2C_Master_SDA_PIN_INPUT();
	for(i = 0; i < 8; i++)
	{
		I2C_MASTER_SCL_SET();
		I2C_Master_delay();
		*dat <<= 1;
		if (I2C_Master_SDA_PIN_GET())
			*dat |= 0x01;
		I2C_MASTER_SCL_CLR();
		I2C_Master_delay();
    }
}
void I2C_Master_Init(void)
{
	gpio_config_t gpio_cfg;

	gpio_cfg.pin_bit_mask = I2C_MASTER_SCL_PIN | I2C_MASTER_SDA_PIN;
	gpio_cfg.mode = I2C_MASTER_SCL_MODE;
	gpio_cfg.pull_up_en = 0;
	gpio_cfg.pull_down_en = 0;
	gpio_cfg.intr_type = GPIO_INTR_DISABLE;
	gpio_config(&gpio_cfg);

	I2C_MASTER_SCL_SET();
	I2C_MASTER_SDA_SET();
}

#define FRAM_FM24CL04B						0	//4K bit / 512字节
#define FRAM_FM24CL16B						1	//16K bit / 2K字节

#define FRAM_FM24CLxx						FRAM_FM24CL16B

#define FRAM_I2C_ADDR						0xA0
#if (FRAM_FM24CLxx == FRAM_FM24CL04B)	//2pages x 256bytes
	#define FRAM_PAGE_MAX						2
	#define FRAM_PAGE_BYTES_MAX					256
	#define FRAM_DATA_ADDR_END					0x1FF
#elif (FRAM_FM24CLxx == FRAM_FM24CL16B)	//8pages x 256bytes
	#define FRAM_PAGE_MAX						8
	#define FRAM_PAGE_BYTES_MAX					256
	#define FRAM_DATA_ADDR_END					0x7FF
#endif

/**
  * @名称: FRAM_WriteBytes
  * @描述: FM24CL04B 同一页写入多个字节	256字节x2页
  * @参数:
  * @参数:
  * @日期：2023
  * @返回: bool
  **/
bool FRAM_WriteBytes(uint8_t *pBytes, uint32_t framStartAddress, uint32_t dataLenght)
{
	uint8_t page;

	if (framStartAddress > FRAM_DATA_ADDR_END) return false;

	page = framStartAddress >> 8;
	if ((page + 1) > FRAM_PAGE_MAX) return false;

	I2C_Master_Start();

	I2C_Master_Send_Byte(FRAM_I2C_ADDR | ((page << 1) & 0x0E) | 0x00);
	I2C_Master_WaitAck();
	I2C_Master_Send_Byte(0xFF & framStartAddress);
	I2C_Master_WaitAck();

	for (uint32_t i = 0; i < dataLenght; i++)
	{
		I2C_Master_Send_Byte(pBytes[i]);
		I2C_Master_WaitAck();
	}

	I2C_Master_Stop();

	return true;
}

/**
  * @名称: FRAM_ReadBytes
  * @描述: FM24CL04B 同一页读多个字节	256字节x2页
  * @参数:
  * @参数:
  * @日期：2023
  * @返回: bool
  **/
bool FRAM_ReadBytes(uint8_t *pBytes, uint32_t framStartAddress, uint32_t dataLenght)
{
	uint8_t page;

	if (framStartAddress > FRAM_DATA_ADDR_END) return false;

	page = framStartAddress >> 8;
	if ((page + 1) > FRAM_PAGE_MAX) return false;

	I2C_Master_Start();

	I2C_Master_Send_Byte(FRAM_I2C_ADDR | ((page << 1) & 0x0E) | 0x00);
	I2C_Master_WaitAck();
	I2C_Master_Send_Byte(framStartAddress & 0xFF);
	I2C_Master_WaitAck();

	I2C_Master_Start();
	I2C_Master_Send_Byte(FRAM_I2C_ADDR | ((page << 1) & 0x0E) | 0x01);
	I2C_Master_WaitAck();
	do
	{
		I2C_Master_Read_Byte(pBytes);
		pBytes++;

		if (dataLenght == 1) {
			I2C_Master_NAck();
		}
		else {
			I2C_Master_Ack();
		}
	}while(--dataLenght);

	I2C_Master_Stop();

	return true;
}


读写示例：
uint8_t datArray[10];
FRAM_WriteBytes(datArray, 0, sizeof(datArray));		//写page0第0-9
FRAM_WriteBytes(datArray, 256, sizeof(datArray));	//写page1第0-9
FRAM_WriteBytes(datArray, 512, sizeof(datArray));	//写page2第0-9

FRAM_ReadBytes(datArray, 0, sizeof(datArray));		//读page0第0-9
FRAM_ReadBytes(datArray, 256, sizeof(datArray));	//读page1第0-9
FRAM_ReadBytes(datArray, 512, sizeof(datArray));	//读page2第0-9

三、I2C驱动（硬 – STM32F103）

@ 优快云 Tyrion.Mon
/**
  * @名称: FRAM_Init
  * @描述: FRAM IO初始化  i2c配置
  * @参数: 
  * @参数: 
  * @日期：2019
  * @返回: bool
  **/
bool FRAM_Init(void)
{
	I2C_InitTypeDef   I2C_InitStruct;
	GPIO_InitTypeDef  GPIO_InitStruct;
	
	RCC_APB2PeriphClockCmd(FRAM_GPIO_CLK,ENABLE);
	RCC_APB1PeriphClockCmd(FRAM_I2C_CLK, ENABLE);
	
	I2C_InitStruct.I2C_ClockSpeed = 100000;	
	I2C_InitStruct.I2C_Mode = I2C_Mode_I2C;
	I2C_InitStruct.I2C_DutyCycle = I2C_DutyCycle_2;	//该参数只有在 I2C 工作在快速模式（时钟工作频率高于 100KHz）下才有意义。
	I2C_InitStruct.I2C_OwnAddress1 = 0x75;
	I2C_InitStruct.I2C_Ack = I2C_Ack_Enable; 
	I2C_InitStruct.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
	I2C_Init(I2C1, &I2C_InitStruct);
	I2C_Cmd(FRAM_I2C, ENABLE);
	
	GPIO_InitStruct.GPIO_Pin =  FRAM_SCL_PIN | FRAM_SDA_PIN;
	GPIO_InitStruct.GPIO_Speed = GPIO_Speed_2MHz;
	GPIO_InitStruct.GPIO_Mode = GPIO_Mode_Out_PP;               
	GPIO_Init(FRAM_GPIO, &GPIO_InitStruct);
	GPIO_SetBits(FRAM_GPIO, FRAM_SCL_PIN);
	GPIO_SetBits(FRAM_GPIO, FRAM_SDA_PIN);
	GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF_OD;               //先把GPIO设为推挽输出并拉倒高电平再转设为复用开漏输出，这样可以有效解决I2C设备死锁的问题???
	GPIO_Init(FRAM_GPIO, &GPIO_InitStruct);

	return true;
}
/**
  * @名称: FRAM_WriteBytes
  * @描述: FM24CL04B 同一页写入多个字节	256字节x2页
  * @参数: 
  * @参数: 
  * @日期：2019
  * @返回: bool
  **/
bool FRAM_WriteBytes(uint8_t framPage, uint8_t *pBytes, uint8_t framStartAddress, uint8_t dataLenght)
{
	if(framPage > 1 || !dataLenght) return false;
	if(framStartAddress + dataLenght > 256) return false;
	/* Send START condition */
	I2C_GenerateSTART(FRAM_I2C, ENABLE);
	/* Test on EV5 and clear it */
	while(I2C_CheckEvent(FRAM_I2C, I2C_EVENT_MASTER_MODE_SELECT) == ERROR);
	//EV5事件被检测到，发送设备地址
	I2C_Send7bitAddress(FRAM_I2C, 0xA0 | (FRAM_ADDRESS << 2) | (framPage << 1), I2C_Direction_Transmitter);
	/* Test on EV6 and clear it */
	while(I2C_CheckEvent(FRAM_I2C, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED ) == ERROR);
	//EV6事件被检测到，发送要操作的存储单元地址
	I2C_SendData (FRAM_I2C, framStartAddress);
	/* Test on EV8 and clear it */
	while(I2C_CheckEvent(FRAM_I2C, I2C_EVENT_MASTER_BYTE_TRANSMITTED ) == ERROR);
	do
	{
		//EV8事件被检测到，发送要存储的数据
		I2C_SendData (FRAM_I2C, *pBytes++);
		/* Test on EV8 and clear it */
		while(I2C_CheckEvent(FRAM_I2C, I2C_EVENT_MASTER_BYTE_TRANSMITTED ) == ERROR);
	}while(--dataLenght);
	/* Send STOP condition */
	I2C_GenerateSTOP(FRAM_I2C, ENABLE);
	return true;
}

/**
  * @名称: FRAM_ReadBytes
  * @描述: FM24CL04B 同一页读多个字节	256字节x2页
  * @参数: 
  * @参数: 
  * @返回: bool
  **/
bool FRAM_ReadBytes(uint8_t framPage, uint8_t *pBytes, uint8_t framStartAddress, uint8_t dataLenght)
{
	if(framPage > 1 || !dataLenght) return false;
	if(framStartAddress + dataLenght > 256) return false;
	/* Send START condition */
	I2C_GenerateSTART(FRAM_I2C, ENABLE);
	/* Test on EV5 and clear it */
	while(I2C_CheckEvent(FRAM_I2C, I2C_EVENT_MASTER_MODE_SELECT) == ERROR);
	//EV5事件被检测到，发送设备地址
	I2C_Send7bitAddress(FRAM_I2C, 0xA0 | (FRAM_ADDRESS << 2) | (framPage << 1), I2C_Direction_Transmitter);
	/* Test on EV6 and clear it */
	while(I2C_CheckEvent(FRAM_I2C, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED ) == ERROR);
	//EV6事件被检测到，发送要操作的存储单元地址
	I2C_SendData (FRAM_I2C, framStartAddress);
	/* Test on EV8 and clear it */
	while(I2C_CheckEvent(FRAM_I2C, I2C_EVENT_MASTER_BYTE_TRANSMITTED ) == ERROR);
	
	/* Send START condition */
	I2C_GenerateSTART(FRAM_I2C, ENABLE);
	/* Test on EV5 and clear it */
	while(I2C_CheckEvent(FRAM_I2C, I2C_EVENT_MASTER_MODE_SELECT) == ERROR);
	//EV5事件被检测到，发送设备地址
	I2C_Send7bitAddress(FRAM_I2C, 0xA0 | (FRAM_ADDRESS << 2) | (framPage << 1), I2C_Direction_Receiver);
	/* Test on EV6 and clear it */
	while(I2C_CheckEvent(FRAM_I2C, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED ) == ERROR);
	
	do
	{
		if(dataLenght == 1)
		{
			I2C_AcknowledgeConfig (FRAM_I2C, DISABLE);
		}
		//EV7事件被检测到	
		while(I2C_CheckEvent(FRAM_I2C, I2C_EVENT_MASTER_BYTE_RECEIVED ) == ERROR);
		//EV8事件被检测到，发送要存储的数据
		*pBytes++ = I2C_ReceiveData (FRAM_I2C);
	}while(--dataLenght);
	/* Send STOP condition */
	I2C_GenerateSTOP(FRAM_I2C, ENABLE);
	I2C_AcknowledgeConfig (FRAM_I2C, ENABLE);
	return true;
}



读写示例：
uint8_t FRAM_ENERGY_BANK[10];
FRAM_ReadBytes(0, FRAM_ENERGY_BANK, 0x00, 10);	//读page0第0-9个数据
FRAM_ReadBytes(1, FRAM_ENERGY_BANK, 0x00, 10);	//读page1第0-9个数据

FRAM_WriteBytes(0, FRAM_ENERGY_BANK, 0x00, 10);	//写page0第0-9个数据
FRAM_WriteBytes(1, FRAM_ENERGY_BANK, 0x00, 10);	//写page1第0-9个数据