GoodFET firmware on the Telos B reveals the Flash chip.

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

diff --git a/firmware/apps/radios/ccspi.c b/firmware/apps/radios/ccspi.c
index ab1051f..ff46616 100644 (file)
--- a/firmware/apps/radios/ccspi.c
+++ b/firmware/apps/radios/ccspi.c
@@ -46,18 +46,16 @@ app_t const ccspi_app = {
        "\tmust be moved into the client.\n"
 };
 
-
-#define RADIOACTIVE SETCE
-#define RADIOPASSIVE CLRCE
-
 //! Set up the pins for CCSPI mode.
 void ccspisetup(){
-  SETSS;
-  P5DIR&=~MISO;
-  P5DIR|=MOSI+SCK;
+  SPIDIR&=~MISO;
+  SPIDIR|=MOSI+SCK;
   DIRSS;
   DIRCE;
   
+  P4OUT|=BIT5; //activate CC2420 voltage regulator
+  P4OUT|=BIT6; //bring CC2420 out of reset
+  
   //Begin a new transaction.
   CLRSS; 
   SETSS;
@@ -113,20 +111,14 @@ u8 ccspi_regread(u8 reg, u8 *buf, int len){
 
 //! Handles a Chipcon SPI command.
 void ccspi_handle_fn( uint8_t const app,
-                                         uint8_t const verb,
-                                         uint32_t const len)
-{
+                     uint8_t const verb,
+                     uint32_t const len){
   unsigned long i;
   
-  //Drop CE to passify radio.
-  RADIOPASSIVE;
-  //Raise !SS to end transaction, just in case we forgot.
-  SETSS;
-  ccspisetup();
+  //debugstr("Chipcon SPI handler.");
   
   switch(verb){
-    //PEEK and POKE might come later.
-  case READ:  
+  case READ:
   case WRITE:
     CLRSS; //Drop !SS to begin transaction.
     for(i=0;i<len;i++)
@@ -137,7 +129,7 @@ void ccspi_handle_fn( uint8_t const app,
 
   case PEEK://Grab CCSPI Register
     CLRSS; //Drop !SS to begin transaction.
-    ccspitrans8(CCSPI_R_REGISTER | cmddata[0]); //000A AAAA
+    cmddata[0]=ccspitrans8(/*CCSPI_R_REGISTER |*/ cmddata[0]); //000A AAAA
     for(i=1;i<len;i++)
       cmddata[i]=ccspitrans8(cmddata[i]);
     SETSS;  //Raise !SS to end transaction.
@@ -146,7 +138,7 @@ void ccspi_handle_fn( uint8_t const app,
     
   case POKE://Poke CCSPI Register
     CLRSS; //Drop !SS to begin transaction.
-    ccspitrans8(CCSPI_W_REGISTER | cmddata[0]); //001A AAAA
+    cmddata[0]=ccspitrans8(/* CCSPI_W_REGISTER |*/ 0x40 | cmddata[0]); //02AA AAAA
     for(i=1;i<len;i++)
       cmddata[i]=ccspitrans8(cmddata[i]);
     SETSS;  //Raise !SS to end transaction.
@@ -157,7 +149,6 @@ void ccspi_handle_fn( uint8_t const app,
     txdata(app,verb,0);
     break;
   case CCSPI_RX:
-    RADIOPASSIVE;
     //Get the packet.
     CLRSS;
     ccspitrans8(CCSPI_RXFIFO);
@@ -185,6 +176,4 @@ void ccspi_handle_fn( uint8_t const app,
   }
   
 
-  SETSS;//End session
-  RADIOACTIVE;
 }