MSP430F67791: SPI driver

Hi Sir,

          Now i have MSP430F67791 interface the W25q64 winbond chip.But communication is not working.what happened?

This is my following code details,

interface pin details for your reference,

SCLK  P3.3   SCK
SOMI  P3.4    DO
SIMO  P3.5    DI
CS      P3.6    CS

void spi_init(void)
{
UCA1CTL1 = UCSWRST;

P3OUT &= ~BIT6;                      // Clear P1.0
P3DIR |= BIT6;                           // Set P1.0 to output direction
P3SEL0 = BIT3| BIT4 | BIT5 ;    // Set P3.0,P3.1,P3.2 to non-IO


UCA1CTL0 |= UCCKPH + UCMSB + UCMST + UCSYNC; 
UCA1CTL1 |= UCSSEL_2; // SMCLK

UCA1BR0 |= 0x02;
UCA1BR1 = 0x00;
UCA1MCTLW = 0;


UCA1CTL1 &= ~UCSWRST;

}

void spi_chipHigh(void)
{
P3OUT |= CS;
}

void spi_chipLow(void)
{
P3OUT &= ~CS;
}

int datacount=0;

unsigned char data=0;

unsigned char GCu_Tx_Data[10];
unsigned char GCu_Recieved_Data[10];

uint8_t sFLASH_SendByte(unsigned char *uData,unsigned char count)
{
while(!(UCA1IFG &= UCTXIFG));

for(datacount=0;datacount<count;datacount++)

UCA1TXBUF = uData[datacount];


while (!(UCA1IFG & UCRXIFG));

uData[0] = UCA1RXBUF;

return *uData;

}

unsigned char Read_SingleBytes(unsigned int LIu_Flash_Add){
unsigned char LCu_Read_Data=0;
spi_chipLow();
GCu_Tx_Data[0] = 0x03;                                           //read 
GCu_Tx_Data[1] = (LIu_Flash_Add >> 16) & 0xFF;
GCu_Tx_Data[2] = (LIu_Flash_Add >> 8) & 0xFF;
GCu_Tx_Data[3] = (LIu_Flash_Add >> 0) & 0xFF;
LCu_Read_Data=sFLASH_SendByte(&GCu_Tx_Data[0],4);
spi_chipHigh();

return(LCu_Read_Data);
}

while(1)

{

Read_SingleBytes(0x000000);

}

If any coding problem pls tell me the exact reason and how to work properly guide me as soon as possible.

Wasn't this answered over here-->?
e2e.ti.com/.../683798

Hi Bruce,

Thanks for pointing this out. I'm going to close this thread, since the thread that you linked already seems to have merged multiple threads of the same issue.

Regards,

James

MSP Customer Applications

Hello Ashokkumar,

For future reference, post your issue only once.

Regards,

James

MSP Customer Applications