X-Git-Url: http://git.rot13.org/?a=blobdiff_plain;f=firmware%2Fapps%2Fspi%2Fspi.c;h=e07cdb544a43d8a8674eb51162bf4bc2f478e095;hb=6d6a522d3adf0ddd18d30f24fd6bba0cc3547041;hp=12eaf60c1d995f612e2a57f91ac69adae755e3e9;hpb=d96bdf017938c586c4eff9e9dd981005f1af7dbe;p=goodfet

diff --git a/firmware/apps/spi/spi.c b/firmware/apps/spi/spi.c
index 12eaf60..e07cdb5 100644
--- a/firmware/apps/spi/spi.c
+++ b/firmware/apps/spi/spi.c
@@ -14,6 +14,28 @@
 
 #include "spi.h"
 
+//! Handles a monitor command.
+void spi_handle_fn( uint8_t const app,
+					uint8_t const verb,
+					uint32_t const len);
+
+// define the spi app's app_t
+app_t const spi_app = {
+
+	/* app number */
+	SPI,
+
+	/* handle fn */
+	spi_handle_fn,
+
+	/* name */
+	"SPI",
+
+	/* desc */
+	"\tThe SPI app handles the SPI bus protocol, turning\n"
+	"\tyour GoodFET into a USB-to-SPI adapter.\n"
+};
+
 //This could be more accurate.
 //Does it ever need to be?
 #define SPISPEED 0
@@ -49,9 +71,9 @@ unsigned char spitrans8(unsigned char byte){
       CLRMOSI;
     byte <<= 1;
     
-    SPIDELAY(100);
+    //SPIDELAY(100);
     SETCLK;
-    SPIDELAY(100);
+    //SPIDELAY(100);
   
     /* read MISO on trailing edge */
     byte |= READMISO;
@@ -238,13 +260,12 @@ void em260_wake(){
 }
 //! Handle an EM260 exchange.
 void spi_rw_em260(u8 app, u8 verb, u32 len){
-  static int state=0;
   unsigned long i;
   u8 lastin;
     
   P4DIR=0; //TODO ASAP remove P4 references.
   P4OUT=0xFF;
-  P4REN=0xFF;
+  //P4REN=0xFF;
     
   //See GoodFETEM260.py for details.
   //The EM260 requires that the host wait for the client.
@@ -254,11 +275,8 @@ void spi_rw_em260(u8 app, u8 verb, u32 len){
     debugstr("Detected HOST_INT.");
   */
     
-  //if(!state++)
-  //if(state++&1)
   em260_wake();
   
- em260woken:
     
   SETMOSI; //Autodetected SPI mode.
   CLRSS; //Drop !SS to begin transaction.
@@ -266,8 +284,9 @@ void spi_rw_em260(u8 app, u8 verb, u32 len){
   for(i=0;i<len;i++){
     lastin=spitrans8(cmddata[i]);
     if(lastin!=0xFF){
-      debugstr("Got a byte during transmission.  (Shouldn't happen with EM260.)");
-      debughex(lastin);
+      //debugstr("EM260 transmission interrupted.");
+      cmddata[0]=lastin;
+      goto response;
     }
   }
   //debugstr("Finished transmission to EM260.");
@@ -287,91 +306,83 @@ void spi_rw_em260(u8 app, u8 verb, u32 len){
   if(!i)
     debugstr("Gave up on host interrupt.");
   
-  debugstr("Reading response.");
+ response:
   len=1;
   while(
 	(cmddata[len++]=spitrans8(0xFF))!=0xA7
 	);
+  if(cmddata[0]==0xFE)
+    while(len<cmddata[1]+3)
+      cmddata[len++]=spitrans8(0xFF);
   SETSS;  //Raise !SS to end transaction.
   
-  
-  if(cmddata[0]==0x02){
-    debugstr("Aborted transaction. :(");
-    //goto em260woken;
-  }
-  
   txdata(app,verb,len);
   return;
 }
 
 //! Handles a monitor command.
-void spihandle(unsigned char app,
-	       unsigned char verb,
-	       unsigned long len){
-  unsigned long i;
-  
-  
-  //Raise !SS to end transaction, just in case we forgot.
-  SETSS;
-  //spisetup();
-  
-  switch(verb){
-    //PEEK and POKE might come later.
-  case READ:
-  case WRITE:
-    CLRSS; //Drop !SS to begin transaction.
-    for(i=0;i<len;i++)
-      cmddata[i]=spitrans8(cmddata[i]);
-    SETSS;  //Raise !SS to end transaction.
-    txdata(app,verb,len);
-    break;
-    
-  case SPI_RW_EM260:  //SPI exchange with an EM260
-    spi_rw_em260(app,verb,len);
-    break;
-    
-  case SPI_JEDEC://Grab 3-byte JEDEC ID.
-    CLRSS; //Drop !SS to begin transaction.
-    spitrans8(0x9f);
-    len=3;  //Length is variable in some chips, 3 minimum.
-    for(i=0;i<len;i++)
-      cmddata[i]=spitrans8(cmddata[i]);
-    txdata(app,verb,len);
-    SETSS;  //Raise !SS to end transaction.
-    break;
-    
-  case PEEK://Grab 128 bytes from an SPI Flash ROM
-    spiflash_peek(app,verb,len);
-    break;
-
-
-  case POKE://Poke up bytes from an SPI Flash ROM.
-    spiflash_pokeblocks(cmddatalong[0],//adr
-			cmddata+4,//buf
-			len-4);//len    
-    
-    txdata(app,verb,0);
-    break;
-
-
-  case SPI_ERASE://Erase the SPI Flash ROM.
-    spiflash_wrten();
-    CLRSS; //Drop !SS to begin transaction.
-    spitrans8(0xC7);//Chip Erase
-    SETSS;  //Raise !SS to end transaction.
-    
-    
-    while(spiflash_status()&0x01)//while busy
-      PLEDOUT^=PLEDPIN;
-    PLEDOUT&=~PLEDPIN;
-    
-    txdata(app,verb,0);
-    break;
-
-  case SETUP:
-    spisetup();
-    txdata(app,verb,0);
-    break;
-  }
-  
+void spi_handle_fn( uint8_t const app,
+					uint8_t const verb,
+					uint32_t const len)
+{
+	unsigned long i, l;
+
+	//Raise !SS to end transaction, just in case we forgot.
+	SETSS;
+	//spisetup();
+
+	switch(verb)
+	{
+	case READ:
+	case WRITE:
+		CLRSS; //Drop !SS to begin transaction.
+		for(i=0;i<len;i++)
+		cmddata[i]=spitrans8(cmddata[i]);
+		SETSS;  //Raise !SS to end transaction.
+		txdata(app,verb,len);
+		break;
+
+	case SPI_RW_EM260:  //SPI exchange with an EM260
+		spi_rw_em260(app,verb,len);
+		break;
+
+	case SPI_JEDEC://Grab 3-byte JEDEC ID.
+		CLRSS; //Drop !SS to begin transaction.
+		spitrans8(0x9f);
+		l=3;  //Length is variable in some chips, 3 minimum.
+		for(i = 0; i < l; i++)
+			cmddata[i]=spitrans8(cmddata[i]);
+		txdata(app,verb,len);
+		SETSS;  //Raise !SS to end transaction.
+		break;
+
+	case PEEK://Grab 128 bytes from an SPI Flash ROM
+		spiflash_peek(app,verb,len);
+		break;
+
+	case POKE://Poke up bytes from an SPI Flash ROM.
+		spiflash_pokeblocks(cmddatalong[0],//adr
+		cmddata+4,//buf
+		len-4);//len    
+		txdata(app,verb,0);
+		break;
+
+	case SPI_ERASE://Erase the SPI Flash ROM.
+		spiflash_wrten();
+		CLRSS; //Drop !SS to begin transaction.
+		spitrans8(0xC7);//Chip Erase
+		SETSS;  //Raise !SS to end transaction.
+
+		while(spiflash_status()&0x01)//while busy
+		PLEDOUT^=PLEDPIN;
+		PLEDOUT&=~PLEDPIN;
+
+		txdata(app,verb,0);
+		break;
+
+	case SETUP:
+		spisetup();
+		txdata(app,verb,0);
+		break;
+	}
 }