Beginnings of info flash support. It isn't very good.

[goodfet] / firmware / apps / radios / nrf.c

diff --git a/firmware/apps/radios/nrf.c b/firmware/apps/radios/nrf.c
index 90fc1a9..bb1ed23 100644 (file)
--- a/firmware/apps/radios/nrf.c
+++ b/firmware/apps/radios/nrf.c
@@ -19,31 +19,26 @@
 //BIT0 should be SS, but in point of fact it is IRQ.
 //BIT4 is actually SS, BIT5 is CE.
 #define SS BIT4
+#define CE BIT5;
 
-//This could be more accurate.
-//Does it ever need to be?
-#define NRFSPEED 0
-#define NRFDELAY(x)
-//delay(x)
+#define RADIOACTIVE  P5OUT|=CE
+#define RADIOPASSIVE P5OUT&=~CE
 
 
 //! Set up the pins for NRF mode.
 void nrfsetup(){
   P5OUT|=SS;
   P5DIR&=~MISO;
-  P5DIR|=MOSI+SCK+SS;
+  P5DIR|=MOSI+SCK+SS+CE;
   
   
-  /*
   //Begin a new transaction.
   P5OUT&=~SS; 
   P5OUT|=SS;
-  */
 }
 
-
 //! Read and write an NRF byte.
-unsigned char nrftrans8(unsigned char byte){
+u8 nrftrans8(u8 byte){
   register unsigned int bit;
   //This function came from the NRF Wikipedia article.
   //Minor alterations.
@@ -67,19 +62,44 @@ unsigned char nrftrans8(unsigned char byte){
 }
 
 
+//! Writes a register
+u8 nrf_regwrite(u8 reg, const u8 *buf, int len){
+  P5OUT&=~SS;
+  
+  reg=nrftrans8(reg);
+  while(len--)
+    nrftrans8(*buf++);
+  
+  P5OUT|=SS;
+  return reg;//status
+}
+//! Reads a register
+u8 nrf_regread(u8 reg, u8 *buf, int len){
+  P5OUT&=~SS;
+  
+  reg=nrftrans8(reg);
+  while(len--)
+    *buf++=nrftrans8(0);
+  
+  P5OUT|=SS;
+  return reg;//status
+}
+
 //! Handles a Nordic RF command.
 void nrfhandle(unsigned char app,
               unsigned char verb,
               unsigned long len){
   unsigned long i;
   
+  //Drop CE to passify radio.
+  RADIOPASSIVE;
   //Raise !SS to end transaction, just in case we forgot.
   P5OUT|=SS;
   nrfsetup();
-    
+  
   switch(verb){
     //PEEK and POKE might come later.
-  case READ:
+  case READ:  
   case WRITE:
     P5OUT&=~SS; //Drop !SS to begin transaction.
     for(i=0;i<len;i++)
@@ -90,7 +110,7 @@ void nrfhandle(unsigned char app,
 
   case PEEK://Grab NRF Register
     P5OUT&=~SS; //Drop !SS to begin transaction.
-    nrftrans8(0|(NRF_R_REGISTER & cmddata[0])); //000A AAAA
+    nrftrans8(NRF_R_REGISTER | cmddata[0]); //000A AAAA
     for(i=1;i<len;i++)
       cmddata[i]=nrftrans8(cmddata[i]);
     P5OUT|=SS;  //Raise !SS to end transaction.
@@ -99,17 +119,46 @@ void nrfhandle(unsigned char app,
     
   case POKE://Poke NRF Register
     P5OUT&=~SS; //Drop !SS to begin transaction.
-    nrftrans8(0|(NRF_W_REGISTER & cmddata[0])); //001A AAAA
+    nrftrans8(NRF_W_REGISTER | cmddata[0]); //001A AAAA
     for(i=1;i<len;i++)
       cmddata[i]=nrftrans8(cmddata[i]);
     P5OUT|=SS;  //Raise !SS to end transaction.
     txdata(app,verb,len);
     break;
-    
   case SETUP:
     nrfsetup();
     txdata(app,verb,0);
     break;
+  case NRF_RX:
+    RADIOPASSIVE;
+    
+    //Get the packet.
+    P5OUT&=~SS;
+    nrftrans8(NRF_R_RX_PAYLOAD);
+    for(i=0;i<32;i++)
+      cmddata[i]=nrftrans8(0xde);
+    P5OUT|=SS;
+    //no break
+    txdata(app,verb,32);
+    break;
+  case NRF_RX_FLUSH:
+    //Flush the buffer.
+    P5OUT&=~SS;
+    nrftrans8(NRF_FLUSH_RX);
+    P5OUT|=SS;
+    
+    //Return the packet.
+    txdata(app,verb,32);
+    break;
+  case NRF_TX:
+  case NRF_TX_FLUSH:
+  default:
+    debugstr("Not yet supported.");
+    txdata(app,verb,0);
+    break;
   }
   
+
+  P5OUT|=SS;//End session
+  RADIOACTIVE;
 }