-
- //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
- P4DIR=0; //TODO ASAP remove P4 references.
- P4OUT=0;
-
- //See GoodFETEM260.py for details.
- //The EM260 requires that the host wait for the client.
-
- em260_wake();
-
- SETMOSI; //Autodetected SPI mode.
- CLRSS; //Drop !SS to begin transaction.
- //Host to slave. Ignore data.
- for(i=0;i<len;i++)
- spitrans8(cmddata[i]);
- //debugstr("Finished transmission to EM260.");
-
- //Could also wait for nHOST_INT to drop.
- i=0xffff;
- while((cmddata[0]=spitrans8(0xFF))==0xFF
- && --i);
- if(!i)
- debugstr("Gave up on host interrupt.");
-
- len=32;
- for(i=1;i<len;i++)
- cmddata[i]=spitrans8(0xFF);
-
-
- SETSS; //Raise !SS to end transaction.
- txdata(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;
+ u8 lastin;
+
+ P4DIR=0; //TODO ASAP remove P4 references.
+ P4OUT=0xFF;
+ //P4REN=0xFF;
+
+ //See GoodFETEM260.py for details.
+ //The EM260 requires that the host wait for the client.
+
+ /*
+ if((~P4IN)&1)
+ debugstr("Detected HOST_INT.");
+ */
+
+ em260_wake();
+
+
+ SETMOSI; //Autodetected SPI mode.
+ CLRSS; //Drop !SS to begin transaction.
+ //Host to slave. Ignore data.
+ for(i=0;i<len;i++){
+ lastin=spitrans8(cmddata[i]);
+ if(lastin!=0xFF){
+ //debugstr("EM260 transmission interrupted.");
+ cmddata[0]=lastin;
+ goto response;
+ }