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 bf68a58..ff46616 100644 (file)
--- a/firmware/apps/radios/ccspi.c
+++ b/firmware/apps/radios/ccspi.c
@@ -1,6 +1,11 @@
 /*! \file ccspi.c
   \author Travis Goodspeed
   \brief Chipcon SPI Register Interface
+  
+  Unfortunately, there is very little similarity between the CC2420
+  and the CC2500, to name just two of the myriad of Chipcon SPI
+  radios.  Auto-detection will be a bit difficult, but more to the
+  point, all high level functionality must be moved into the client.
 */
 
 //Higher level left to client application.
@@ -15,18 +20,42 @@
 #include "ccspi.h"
 #include "spi.h"
 
+//! Handles a Chipcon SPI command.
+void ccspi_handle_fn( uint8_t const app,
+                                         uint8_t const verb,
+                                         uint32_t const len);
+
+// define the ccspi app's app_t
+app_t const ccspi_app = {
+
+       /* app number */
+       CCSPI,
+
+       /* handle fn */
+       ccspi_handle_fn,
 
-#define RADIOACTIVE SETCE
-#define RADIOPASSIVE CLRCE
+       /* name */
+       "CCSPI",
+
+       /* desc */
+       "\tThe CCSPI app adds support for the Chipcon SPI register\n"
+       "\tinterface. Unfortunately, there is very little similarity\n"
+       "\tbetween the CC2420 and the CC2500, to name just two of the\n"
+       "\tmyriad of Chipcon SPI radios.  Auto-detection will be a bit\n"
+       "\tdifficult, but more to the point, all high level functionality\n"
+       "\tmust be moved into the client.\n"
+};
 
 //! 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;
@@ -81,20 +110,15 @@ u8 ccspi_regread(u8 reg, u8 *buf, int len){
 }
 
 //! Handles a Chipcon SPI command.
-void ccspihandle(unsigned char app,
-              unsigned char verb,
-              unsigned long len){
+void ccspi_handle_fn( uint8_t const app,
+                     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++)
@@ -105,7 +129,7 @@ void ccspihandle(unsigned char 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.
@@ -114,7 +138,7 @@ void ccspihandle(unsigned char 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.
@@ -125,7 +149,6 @@ void ccspihandle(unsigned char app,
     txdata(app,verb,0);
     break;
   case CCSPI_RX:
-    RADIOPASSIVE;
     //Get the packet.
     CLRSS;
     ccspitrans8(CCSPI_RXFIFO);
@@ -153,6 +176,4 @@ void ccspihandle(unsigned char app,
   }
   
 
-  SETSS;//End session
-  RADIOACTIVE;
 }