Driver for RAMTRON FM2504 F-RAM Memory

FM25.c

#include  "FM25.h"
/******************************************************************************
* @file    FM25.c
* @author  Molotaliev A.O(molotaliev@xprom.ru)
* @version V 0.0.1
* @date    1-october-2016
* @brief   This Driver for RAMTRON FM2504 F-RAM Memory
*         
*
****************************************************************************/
 void FM25_Init (void)
{
  FM25_Gpio_Init();
  SPI_InitTypeDef   SPI_InitStructure;
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2, ENABLE);
  SPI_I2S_DeInit(SPI2);
  SPI_StructInit(&SPI_InitStructure);
  SPI_InitStructure.SPI_Direction         = SPI_Direction_2Lines_FullDuplex;
  SPI_InitStructure.SPI_Mode              = SPI_Mode_Master;
  SPI_InitStructure.SPI_DataSize          = SPI_DataSize_8b;
  SPI_InitStructure.SPI_CPOL              = SPI_CPOL_Low;
  SPI_InitStructure.SPI_CPHA              = SPI_CPHA_1Edge;
  SPI_InitStructure.SPI_NSS               = SPI_NSS_Soft;
  SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_8; 
  SPI_InitStructure.SPI_FirstBit          = SPI_FirstBit_MSB;
  SPI_InitStructure.SPI_CRCPolynomial     = 7;
  SPI_Init(SPI2, &SPI_InitStructure);
  SPI_Cmd(SPI2, ENABLE);
  SPI_NSSInternalSoftwareConfig(SPI2,SPI_NSSInternalSoft_Set);
}
 /********************************************************************************/
 void FM25_ChipSelect(void)
{
  GPIO_WriteBit(GPIOC,GPIO_Pin_3,Bit_RESET);
}
/********************************************************************************/
 void FM25_ChipDeselect(void)
{
  GPIO_WriteBit(GPIOC,GPIO_Pin_3,Bit_SET); 
}
/********************************************************************************/
 void FM25_Gpio_Init(void)
{

  GPIO_InitTypeDef GPIO_InitStructure;
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB|RCC_APB2Periph_GPIOC, ENABLE);

 
  GPIO_InitStructure.GPIO_Mode   = GPIO_Mode_AF_OD;
  GPIO_InitStructure.GPIO_Speed  = GPIO_Speed_50MHz;
  /* SPI SCK pin configuration */
  GPIO_InitStructure.GPIO_Pin    = GPIO_Pin_13;//SPIx_SCK_PIN;
  GPIO_Init(GPIOB, &GPIO_InitStructure);
  
  /* SPI  MISO pin configuration */
  GPIO_InitStructure.GPIO_Pin    = GPIO_Pin_14;//SPIx_MISO_PIN;
  GPIO_Init(GPIOB, &GPIO_InitStructure);  

  /* SPI  MOSI pin configuration */
  GPIO_InitStructure.GPIO_Pin    =  GPIO_Pin_15;//SPIx_MOSI_PIN;
  GPIO_Init(GPIOB, &GPIO_InitStructure);
 
  GPIO_InitStructure.GPIO_Mode   = GPIO_Mode_Out_OD;
  GPIO_InitStructure.GPIO_Speed  = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Pin    = GPIO_Pin_3;
  GPIO_Init(GPIOC, &GPIO_InitStructure);
  
    
}
/********************************************************************************/
 void FM25_WriteData(uint16_t Addres, const uint8_t* Data,uint16_t DataCount)
{
  FM25_SetWriteEnableLatch();
  for(uint16_t i = 0; i< DataCount;i++)
  {
    FM25_WriteDataByte(Addres + DataCount , Data[i]);
  }
  FM25_ResetWriteEnableLatch();
}
/********************************************************************************/
 void FM25_ReadData(uint16_t Addres, uint8_t* Data,uint16_t DataCount)
{ 
  for(uint16_t i = 0; i< DataCount;i++)
  {
    Data[i] = FM25_ReadDataByte(Addres + DataCount);  
  }
 
}
/********************************************************************************/
 inline uint8_t FM25_WriteByteReadByte(uint8_t Data)
{
  FM25_WriteRawByte(Data);
  return FM25_ReadRawByte();
}
/********************************************************************************/
inline void FM25_WriteRawByte(uint16_t Data)
{
  do{}while(SPI_I2S_GetFlagStatus(SPI2,SPI_I2S_FLAG_TXE)!=SET);
  SPI_I2S_SendData(SPI2,Data);
  
}
/********************************************************************************/
inline uint8_t FM25_ReadRawByte(void)
{
   do{}while(SPI_I2S_GetFlagStatus(SPI2,SPI_I2S_FLAG_RXNE)!=SET);
   uint8_t  DataOut = SPI_I2S_ReceiveData(SPI2);
   return DataOut;
}
/********************************************************************************/
 void FM25_SetWriteEnableLatch(void)
{
  FM25_ChipSelect();
  FM25_WriteOpcode(FM25_Opcode_WREN);
  FM25_ChipDeselect();
}
/********************************************************************************/
 void FM25_ResetWriteEnableLatch(void)
{
  FM25_ChipSelect();
  FM25_WriteOpcode(FM25_Opcode_WRDI);
  FM25_ChipDeselect();
}
/********************************************************************************/
 void FM25_WriteOpcode(FM25_Opcode Opcode)
{
  FM25_WriteByteReadByte(Opcode);
}
/********************************************************************************/
 void FM25_WriteStatusRegister(FM25_StatusRegister Register)
{
  FM25_ChipSelect();
  FM25_WriteOpcode(FM25_Opcode_WRSR);
  FM25_WriteByteReadByte(Register.RegisterRaw);
  FM25_ChipDeselect();
  
}
/********************************************************************************/
 FM25_StatusRegister FM25_ReadStatusRegister(void)
{
  FM25_StatusRegister Register;
  FM25_ChipSelect();
  FM25_WriteOpcode(FM25_Opcode_RDSR);
  Register.RegisterRaw = FM25_WriteByteReadByte(0);
  FM25_ChipDeselect();
  return Register;
  
}
/********************************************************************************/
 void FM25_WriteDataByte(uint16_t DataAdress,uint8_t Data)
{
  FM25_ChipSelect();
  FM25_WriteOpcode(FM25_Opcode_WRITE);
  FM25_WriteDataAddres(DataAdress);
  FM25_WriteByteReadByte(Data);
  FM25_ChipDeselect();
}
/********************************************************************************/
 uint8_t FM25_ReadDataByte(uint16_t DataAdress)
{
  uint8_t Data;
  FM25_ChipSelect();
  FM25_WriteOpcode(FM25_Opcode_READ);
  FM25_WriteDataAddres(DataAdress);
  Data = FM25_WriteByteReadByte(0);
  FM25_ChipDeselect();
  return Data;
};
/********************************************************************************/
 uint16_t FM25_ConvertAdressto13Bit(uint16_t DataAdress)
{
  return DataAdress & 0x1FFF;
}
/********************************************************************************/
 void FM25_GetLSBandMSBfrom13BitAdress(uint16_t DataAdress,uint8_t& MSB,uint8_t& LSB)
{
  LSB = DataAdress  & 0xFF;
  MSB = (DataAdress >> 8) & 0x3F;
  
}
/********************************************************************************/
 void FM25_WriteDataAddres(uint16_t DataAdress)
{
  uint8_t MSB = 0;
  uint8_t LSB = 0;
  uint16_t SourceDataAdress  = FM25_ConvertAdressto13Bit(DataAdress);
  FM25_GetLSBandMSBfrom13BitAdress(SourceDataAdress,MSB,LSB);
  FM25_WriteByteReadByte(MSB);
  FM25_WriteByteReadByte(LSB);

  
}

FM25.h

#include "stm32f10x.h"
#include "stm32f10x_spi.h"
#include "stm32f10x_gpio.h"
#ifndef _FM25_MEMORY_
#define _FM25_MEMORY_

/******************************************************************************
* @file    FM25.h
* @author  Molotaliev A.O(molotaliev@xprom.ru)
* @version V 0.0.1
* @date    1-october-2016
* @brief   This Driver for RAMTRON FM2504 F-RAM Memory
*         
*
****************************************************************************/
typedef enum FM25_Opcode
{
  FM25_Opcode_WREN  = 0x6,
  FM25_Opcode_WRDI  = 0x4,
  FM25_Opcode_RDSR  = 0x5,
  FM25_Opcode_WRSR  = 0x1,
  FM25_Opcode_READ  = 0x3,
  FM25_Opcode_WRITE = 0x2,

}FM25_Opcode;

typedef  union FM25_StatusRegister
{
  typedef struct FM25_StatusRegisterS
  {
    uint8_t RESERVED0:1;
    uint8_t WEL:1;
    uint8_t BP0:1;
    uint8_t BP1:1;
    uint8_t RESERVED4:1;
    uint8_t RESERVED5:1;
    uint8_t RESERVED6:1;
    uint8_t WPEN:1;
  }FM25_StatusRegisterS;
  uint8_t RegisterRaw;
}FM25_StatusRegister;

#ifdef __cplusplus
 extern "C" {
#endif
   
void FM25_Init(void);
void FM25_Gpio_Init(void);

void FM25_ChipSelect(void);
void FM25_ChipDeselect(void);

uint16_t FM25_ConvertAdressto13Bit(uint16_t DataAdress);
void FM25_GetLSBandMSBfrom13BitAdress(uint16_t DataAdress,uint8_t& MSB,uint8_t& LSB);

void FM25_WriteRawByte(uint16_t Data);
void FM25_WriteDataAddres(uint16_t DataAdress);
void FM25_WriteDataByte(uint16_t DataAdress,uint8_t Data);
void FM25_WriteData(uint16_t Addres, const uint8_t* Data,uint16_t DataCount);

uint8_t FM25_ReadRawByte(void);
uint8_t FM25_ReadDataByte(uint16_t DataAdress);
void FM25_ReadData(uint16_t Addres, uint8_t* Data,uint16_t DataCount);

uint8_t FM25_WriteByteReadByte(uint8_t Data);

void FM25_SetWriteEnableLatch(void);
void FM25_ResetWriteEnableLatch(void);

void FM25_WriteStatusRegister(FM25_StatusRegister Register);
FM25_StatusRegister FM25_ReadStatusRegister(void);

void FM25_WriteOpcode(FM25_Opcode Opcode);

#ifdef __cplusplus
 }
#endif 
#endif