//-----------------------------------spi.h----------------------------------------------------------------------------------
#include "msp430g2553.h"
#defineINIT_PORT()init_port()/* Initialize MMC control port (CS/CLK/DI:output, DO:input) */
#define CS_PORT P2OUT //CS port
#define CK_PORT P2OUT //CK port
#define DI_PORT P2OUT //DI port
#define DO_PORT P2IN //DO port
#define CS BIT0 //CS pin
#define CK BIT1 //CK pin
#define DI BIT2 //DI pin
#define DO_ BIT3 //DO pin
#define CS_H() CS_PORT |= CS //CS pin
#define CS_L()CS_PORT &= ~CS//CS pin
#define CK_H()CK_PORT |= CK //CK pinini bir yap.
#defineCK_L()CK_PORT &= ~CK//CK pinini sýfýr yap.
#define DI_H()DI_PORT |= DI //DI pinini bir yap.
#define DI_L()DI_PORT &= ~DI//DI pinini sýfýr yap.
#define DO DO_PORT & DO_ //DO pinindeki veriyi oku.
void init_port(void){
P2DIR = 0x07;
P2REN = 0X0F;
}
/*-----------------------------------------------------------------------*/
/* Transmit a byte to eeprom */
/*-----------------------------------------------------------------------*/
static
void tbyte (unsigned char d)/* Data to be sent */
{
if (d & 0x20) DI_H(); else DI_L();/* bit7 */
CK_H(); CK_L();
if (d & 0x0) DI_H(); else DI_L();/* bit6 */
CK_H(); CK_L();
if (d & 0x20) DI_H(); else DI_L();/* bit5 */
CK_H(); CK_L();
if (d & 0x10) DI_H(); else DI_L();/* bit */
CK_H(); CK_L();
if (d & 0x02) DI_H(); else DI_L();/* bit3 */
CK_H(); CK_L();
if (d & 0x0) DI_H(); else DI_L();/* bit2 */
CK_H(); CK_L();
if (d & 0x02) DI_H(); else DI_L();/* bit1 */
CK_H(); CK_L();
if (d & 0x01) DI_H(); else DI_L();/* bit0 */
CK_H(); CK_L();
}
/*-----------------------------------------------------------------------*/
/* Receive a byte from eeprom */
/*-----------------------------------------------------------------------*/
static
unsigned char rbyte (void)
{
unsigned char r;
DI_H();/* Send 0xFF */
CK_L();
r = 0; if (DO) r++;/* bit7 */
CK_H(); CK_L();
r <<= 1; if (DO) r++;/* bit6 */
CK_H(); CK_L();
r <<= 1; if (DO) r++;/* bit5 */
CK_H(); CK_L();
r <<= 1; if (DO) r++;/* bit */
CK_H(); CK_L();
r <<= 1; if (DO) r++;/* bit3 */
CK_H(); CK_L();
r <<= 1; if (DO) r++;/* bit2 */
CK_H(); CK_L();
r <<= 1; if (DO) r++;/* bit1 */
CK_H(); CK_L();
r <<= 1; if (DO) r++;/* bit0 */
CK_H(); CK_L();
return r;
}
/*-----------------------------------------------------------------------*/
/* Skip bytes on the MMC (bitbanging) */
/*-----------------------------------------------------------------------*/
static
void skip_xbyte (unsigned short n)/* Number of bytes to skip */
{
DI_H();/* Send 0xFF */
do {
CK_H(); CK_L();
CK_H(); CK_L();
CK_H();CK_L();
CK_H(); CK_L();
CK_H(); CK_L();
CK_H(); CK_L();
CK_H(); CK_L();
CK_H(); CK_L();
} while (--n);
}
/*-----------------------------------------------------------------------*/
/* Deselect the card and release SPI bus */
/*-----------------------------------------------------------------------*/
static
void release_spi (void)
{
CS_H();
rbyte();
}
//-----------------------------------EEPROM_EN25T80.h--------------------------------------------------------------------------------------------------------
#include "spi.h"
//WRITE ENABLE
void write_enable(void)
{
CS_L();
__delay_cycles(20);
tbyte(0x06);
CS_H();
}
//WRITE DISABLE
void write_disable(void)
{
CS_L();
__delay_cycles(20);
tbyte(0x04);
CS_H();
}
//READ STATUS REGISTER
unsigned char Read_status_res(void)
{
unsigned char r;
CS_L();
__delay_cycles(20);
tbyte(0x05);
r = rbyte();
CS_H();
return r;
}
//WRITE STATUS REGISTER
void Write_status_res(unsigned char d)
{
CS_L();
__delay_cycles(20);
tbyte(0x01);
tbyte(d);
CS_H();
}
// READ 1 BYTE
unsigned char read_1byte( unsigned long y )// doc 1 byte bat dau tu bit co address y
{ unsigned char add1,add2,add3;
unsigned char data;
add1 = (y>>16)&0xff;
add2 = (y>>8)&0xff;
add3 = y&0xff;
CS_L();
__delay_cycles(20);
tbyte(0x03);
tbyte(add1);
tbyte(add2);
tbyte(add3);
data = rbyte();
CS_H();
return data;
}
// READ x BYTE
void read_xbyte( unsigned char *buff, int x, unsigned long y )// doc x byte (max:512)bat dau tu bit co address y
{ unsigned char add1,add2,add3;
add1 = (y>>16)&0xff;
add2 = (y>>8)&0xff;
add3 = y&0xff;
CS_L();
__delay_cycles(20);
tbyte(0x03);
tbyte(add1);
tbyte(add2);
tbyte(add3);
for(int i=0;i<x;i++)
{
*buff++ = rbyte();
}
CS_H();
}
//PAGE PROGRAM- WRITE DATA
void write_xdata(unsigned char *buff, int x,unsigned long y)//ghi x byte vao trong eeprom tu vi tri address bit la y
{
unsigned char add1,add2,add3;
add1 = (y>>16)&0xff;
add2 = (y>>8)&0xff;
add3 = y&0xff;
write_enable();
CS_L();
__delay_cycles(20);
tbyte(0x02);
tbyte(add1);
tbyte(add2);
tbyte(add3);
for(int i=0;i<x;i++)
{
tbyte(buff[I]);[/I]
[I] }[/I]
[I] CS_H();[/I]
[I] write_disable();[/I]
[I]}[/I]
[I]// XOA SECTOR[/I]
[I]void Sector_Eraser ( unsigned long y )// doc 1 byte bat dau tu bit co address y[/I]
[I]{ unsigned char add1,add2,add3;[/I]
[I] add1 = (y>>16)&0xff;[/I]
[I] add2 = (y>>8)&0xff;[/I]
[I] add3 = y&0xff;[/I]
[I] CS_L();[/I]
[I] __delay_cycles(20);[/I]
[I] tbyte(0x20);[/I]
[I] tbyte(add1);[/I]
[I] tbyte(add2);[/I]
[I] tbyte(add3);[/I]
[I] CS_H();[/I]
[I] }[/I]
[I]//-----------------------------------main.c----------------------------------------------------------------------------------------------------------[/I]
[I]#include "msp430g2553.h"[/I]
[I]#include "epprom_EN25T80.h"[/I]
[I]unsigned char buff[350];[/I]
[I]unsigned char xbuff[28]={1,2,3,4,14,1,0, 1,2,3,4,14,2,0, 1,5,3,4,14,1,0, 1,2,3,4,14,1,0xff}; [/I]
[I]void main( void )[/I]
[I]{[/I]
[I] // Stop watchdog timer to prevent time out reset[/I]
[I] WDTCTL = WDTPW + WDTHOLD;[/I]
[I] BCSCTL1 = CALBC1_8MHZ; // Set DCO[/I]
[I] DCOCTL = CALDCO_8MHZ;[/I]
[I] P1DIR |= BIT0;[/I]
[I] P1OUT &= ~BIT4;[/I]
[I] P1OUT &= ~BIT0;[/I]
[I] //read_xbyte(buff,28,0);[/I]
[I]__delay_cycles(200000);[/I]
[I] Sector_Eraser(0); //xoa sector 0[/I]
[I]__delay_cycles(200000);[/I]
[I] write_xdata(xbuff, 28,0); //ghi mang xbuff co 28 byte vao dia chi 000000h[/I]
[I] __delay_cycles(2000000);[/I]
[I] read_xbyte(buff,28,0); //doc 28 byte tu eeprom có dia chi bat dau tu 000000h va luu vao mang buff[/I]
[I]__delay_cycles(200000);[/I]
[I]//gui buff len may tinh qua uart khi nhan duoc byte 0x31 tu may tinh gui xuong[/I]
[I]P1SEL |= BIT1 + BIT2 ; // P1.1 = RXD, P1.2=TXD[/I]
[I]P1SEL2 |= BIT1 + BIT2 ; // P1.1 = RXD, P1.2=TXD[/I]
[I]UCA0CTL1 |= UCSSEL_2; // SMCLK[/I]
[I]UCA0BR0 = 0X41; //8Mhz-9600, //104: 1MHz 9600[/I]
[I]UCA0BR1 = 3; //8Mhz-9600, //0: 1MHz 9600[/I]
[I]UCA0MCTL = UCBRS0; // Modulation UCBRSx = 1[/I]
[I]UCA0CTL1 &= ~UCSWRST; // **Initialize USCI state machine**[/I]
[I]IE2 |= UCA0RXIE; // Enable USCI_A0 RX interrupt[/I]
[I]__bis_SR_register(LPM0_bits +GIE); // Enter LPM0, interrupts enabled[/I]
[I]}[/I]
[I]// Echo back RXed character, confirm TX buffer is ready first[/I]
[I]#pragma vector=USCIAB0RX_VECTOR[/I]
[I]__interrupt void USCI0RX_ISR(void)[/I]
[I]{[/I]
[I] if(UCA0RXBUF==0x31) //neu nhan duoc 0x31 tu may tinh gui xuong thi se truyen mang buff len may tinh[/I]
[I] {[/I]
[I] P1OUT |= BIT0; //toggle led P1.0[/I]
[I]__delay_cycles(200000);[/I]
[I]P1OUT &= ~BIT0;[/I]
[I]__delay_cycles(200000);[/I]
[I] for(int i=0;i<28;i++)[/I]
[I] {[/I]
[I] while (!(IFG2&UCA0TXIFG)); // USCI_A0 TX buffer ready?[/I]
[I] UCA0TXBUF = buff[I]; // TX -> RXed character[/I][/I]
[I] }[/I]
[I] }[/I]
[I]}[/I]
