#include <io.h>
#include <iomacros.h>
-
-//Pins and I/O
-#define SS BIT0
-#define MOSI BIT1
-#define MISO BIT2
-#define SCK BIT3
-
+#include <spi.h>
//This could be more accurate.
//Does it ever need to be?
#define SPISPEED 0
#define SPIDELAY(x) delay(x)
-#define SETMOSI P5OUT|=MOSI
-#define CLRMOSI P5OUT&=~MOSI
-#define SETCLK P5OUT|=SCK
-#define CLRCLK P5OUT&=~SCK
-#define READMISO (P5IN&MISO?1:0)
-
-
//! Set up the pins for SPI mode.
void spisetup(){
}
-//! Read and write an SPI bit.
+//! Read and write an SPI byte.
unsigned char spitrans8(unsigned char byte){
unsigned int bit;
//This function came from the SPI Wikipedia article.
//! Enable SPI writing
void spiflash_wrten(){
+ SETSS;
P5OUT&=~SS; //Drop !SS to begin transaction.
spitrans8(0x04);//Write Disable
P5OUT|=SS; //Raise !SS to end transaction.
//! Grab the SPI flash status byte.
void spiflash_setstatus(unsigned char c){
- P5OUT&=~SS; //Drop !SS to begin transaction.
+ SETSS;
+ CLRSS; //Drop !SS to begin transaction.
spitrans8(0x01);//SET STATUS
spitrans8(c);
- P5OUT|=SS; //Raise !SS to end transaction.
+ SETSS; //Raise !SS to end transaction.
//return c;
}
+
+//! Read a block to a buffer.
+void spiflash_peekblock(unsigned long adr,
+ unsigned char *buf,
+ unsigned int len){
+ unsigned char i;
+
+ SETSS;
+ CLRSS; //Drop !SS to begin transaction.
+ spitrans8(0x03);//Flash Read Command
+
+ //Send address
+ spitrans8((adr&0xFF0000)>>16);
+ spitrans8((adr&0xFF00)>>8);
+ spitrans8(adr&0xFF);
+
+ for(i=0;i<len;i++)
+ buf[i]=spitrans8(0);
+ SETSS; //Raise !SS to end transaction.
+}
+
+
+//! Read a block to a buffer.
+void spiflash_pokeblock(unsigned long adr,
+ unsigned char *buf,
+ unsigned int len){
+ unsigned char i;
+
+ SETSS;
+
+ spiflash_setstatus(0x02);
+ spiflash_wrten();
+
+ CLRSS; //Drop !SS to begin transaction.
+ spitrans8(0x02); //Poke command.
+
+ //Send address
+ spitrans8((adr&0xFF0000)>>16);
+ spitrans8((adr&0xFF00)>>8);
+ spitrans8(adr&0xFF);
+
+ for(i=0;i<len;i++)
+ spitrans8(buf[i]);
+ SETSS; //Raise !SS to end transaction.
+
+ while(spiflash_status()&0x01)
+ ;
+
+ return;
+}
+
+
//! Peek some blocks.
void spiflash_peek(unsigned char app,
unsigned char verb,
spitrans8(cmddata[i]);
P5OUT|=SS; //Raise !SS to end transaction.
+
while(spiflash_status()&0x01)//while busy
P1OUT^=1;
P1OUT&=~1;
P5OUT&=~SS; //Drop !SS to begin transaction.
spitrans8(0xC7);//Chip Erase
P5OUT|=SS; //Raise !SS to end transaction.
+
+
+ while(spiflash_status()&0x01)//while busy
+ P1OUT^=1;
+ P1OUT&=~1;
+
txdata(app,verb,0);
break;
-
case SETUP:
spisetup();
txdata(app,verb,0);