Thank you very much! I tested the code below yesterday. But i found the clock is normal, the chip select is always low, the SOU pin of the MPC5644A is normal, the SIN pin of the MPC5644A is always high impendence. In addition, i do not know how to configure the timer correctly. Would you mind sending a code to me ? Thank you a lot! Here is my code.
#include "MPC5644A.h"
/*******************************************************************************
* Constants and macros
*******************************************************************************/
#define EEPROM_CMD_WREN 6
#define EEPROM_CMD_WRDI 4
#define EEPROM_CMD_WRITE 2
#define EEPROM_CMD_RDSR 5
#define EEPROM_CMD_READ 3
#define LED SIU.GPDO[219].R
#define WIP 0x01
uint8_t txData[]={"Hello...."};
uint8_t rxData[10];
/***********************************************
system Initialization
************************************************/
void initSysclk (void)
{
FMPLL.ESYNCR1.B.CLKCFG = 0X7; /* Change clk to PLL normal from crystal*/
FMPLL.SYNCR.R = 0x16080000; /* 8 MHz xtal: 0x16080000; 40MHz: 0x46100000 */
while (FMPLL.SYNSR.B.LOCK != 1) {}; /* Wait for FMPLL to LOCK */
FMPLL.SYNCR.R = 0x16000000; /* 8 MHz xtal: 0x16000000; 40MHz: 0x46080000 */
}
/****************************************************
SIU I nitialization
*****************************************************/
void SIU_Init(void)
{
SIU.PCR[102].R = 0x0600; //clock
SIU.PCR[103].R = 0x0500; //SIN
SIU.PCR[104].R = 0x0600; //SOU
SIU.PCR[106].R = 0x0600; //CS
}
void Delay(int m)
{
int ii,jj;
if (m<1) m=1;
for(ii=0;ii<m;ii++)
for(jj=0;jj<400;jj++){}
}
/*******************************************
DSPI_B Initialization
*******************************************/
void DSPI_Init(void)
{
DSPI_B.MCR.R = 0x80010001; /* Configure DSPI as master */
DSPI_B.CTAR[0].R = 0x38044425; /* Configure CTAR0 */ i do not know whether the CATR[0] is right
DSPI_B.MCR.B.HALT = 0x0; /* Exit HALT mode: go from STOPPED to RUNNING state*/
}
static uint8_t Write_Byte(uint16_t cmd, uint16_t data)
{
uint16_t response = 0x0000;
DSPI_B.PUSHR.R = (uint32_t)((uint32_t)(cmd<<16) + data); /**/
while (DSPI_B.SR.B.RFDF != 1){} /* Wait for Receive FIFO Drain Flag = 1 */
response = (uint8_t)DSPI_B.POPR.R; /* Read data received by master SPI */
DSPI_B.SR.R = 0x80020000;
return((uint8_t)(0xFF & response)); //When i debug, the response is always 0xFF
}
void EEPROMWriteEnable(void)
{
Write_Byte(0x0001,EEPROM_CMD_WREN);
}
uint8_t EEPROMReadRDSR(void)
{
uint8_t response;
//read register status EEPROM_CMD_RDSR equal 5
response = Write_Byte(0x8001,EEPROM_CMD_RDSR);
response = Write_Byte(0x0001,0); // dummy byte to read status
return response;
}
void EEPROMWriteBytes(uint16_t Address, uint8_t *pWriteData, uint8_t DataSize)
{
uint8_t response,i,addrH,addrL;
addrH = ((Address&0xFF00)>>8);
addrL =(Address&0x00FF) ;
response = Write_Byte(0x8001,EEPROM_CMD_WRITE); /*command write */
response = Write_Byte(0x8001,addrH); //high address byte/
response = Write_Byte(0x8001,addrL); //low address byte/
for (i = 0; i < (DataSize-1); i++)
{
response = Write_Byte(0x8001,*pWriteData++);
}
response = Write_Byte(0x0001,*pWriteData); // write last data byte
}
uint8_t EEPROMReadBytes(uint32_t Address, uint8_t *pReadData, uint8_t DataSize)
{
uint8_t response,i,addrH,addrL;
addrH = (Address&0xFF00)>>8;
addrL = Address&0x00FF;
response = Write_Byte(0x8001, EEPROM_CMD_READ);
response = Write_Byte(0x8001,addrH); //high address byte/
response = Write_Byte(0x8001,addrL); //low address byte/
for (i = 0; i < (DataSize-1); i++)
{
*pReadData++ = Write_Byte(0x8001,0); // dummy byte to read data
}
*pReadData = Write_Byte(0x0001,0); // dummy write for last last data read
}
/*******************************************************************************
* Global functions
*******************************************************************************/
void main (void)
{
uint8_t status;
initSysclk();
INTC_Init(); // I have no idea to configure INTC, Can you help me?
SIU_Init();
DSPI_Init();
EEPROMWriteEnable();
EEPROMWriteBytes(0,&txData[0],6);
status=EEPROMReadRDSR();
EEPROMReadBytes(0,&rxData[0],6);
while(1)
{
}
}
