/*! \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.
#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,
-#define RADIOACTIVE SETCE
-#define RADIOPASSIVE CLRCE
+ /* handle fn */
+ ccspi_handle_fn,
+
+ /* 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
+ msdelay(100);
+
+ //Reset the CC2420.
+ P4OUT&=~BIT6;
+ P4OUT|=BIT6;
+
//Begin a new transaction.
- CLRSS;
+ CLRSS;
SETSS;
}
}
//! 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 PEEK:
+ cmddata[0]|=0x40; //Set the read bit.
+ //DO NOT BREAK HERE.
+ case READ:
case WRITE:
+ case POKE:
CLRSS; //Drop !SS to begin transaction.
for(i=0;i<len;i++)
cmddata[i]=ccspitrans8(cmddata[i]);
SETSS; //Raise !SS to end transaction.
txdata(app,verb,len);
break;
-
- case PEEK://Grab CCSPI Register
- CLRSS; //Drop !SS to begin transaction.
- 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.
- txdata(app,verb,len);
- break;
-
- case POKE://Poke CCSPI Register
- CLRSS; //Drop !SS to begin transaction.
- ccspitrans8(CCSPI_W_REGISTER | cmddata[0]); //001A AAAA
- for(i=1;i<len;i++)
- cmddata[i]=ccspitrans8(cmddata[i]);
- SETSS; //Raise !SS to end transaction.
- txdata(app,verb,len);
- break;
case SETUP:
ccspisetup();
txdata(app,verb,0);
break;
case CCSPI_RX:
- RADIOPASSIVE;
- //Get the packet.
+#ifdef FIFOP
+ //Has there been an overflow?
+ if((!FIFO)&&FIFOP){
+ debugstr("Clearing overflow");
+ CLRSS;
+ ccspitrans8(0x08); //SFLUSHRX
+ SETSS;
+ }
+
+ //Is there a packet?
+ if(FIFOP&&FIFO){
+ //Wait for completion.
+ while(SFD);
+
+ //Get the packet.
+ CLRSS;
+ ccspitrans8(CCSPI_RXFIFO | 0x40);
+ //ccspitrans8(0x3F|0x40);
+ cmddata[0]=0xff; //to be replaced with length
+ for(i=0;i<cmddata[0]+2;i++)
+ cmddata[i]=ccspitrans8(0xde);
+ SETSS;
+
+ //Flush buffer.
+ CLRSS;
+ ccspitrans8(0x08); //SFLUSHRX
+ SETSS;
+ //Only should transmit length of one more than the reported
+ // length of the frame, which holds the length byte:
+ txdata(app,verb,cmddata[0]+1);
+ }else{
+ //No packet.
+ txdata(app,verb,0);
+ }
+#else
+ debugstr("Can't RX a packet with SFD and FIFOP definitions.");
+ txdata(app,NOK,0);
+#endif
+ break;
+ case CCSPI_RX_FLUSH:
+ //Flush the buffer.
CLRSS;
- ccspitrans8(CCSPI_R_RX_PAYLOAD);
- for(i=0;i<32;i++)
- cmddata[i]=ccspitrans8(0xde);
+ ccspitrans8(CCSPI_SFLUSHRX);
SETSS;
- //no break
- txdata(app,verb,32);
+
+ txdata(app,verb,0);
break;
- case CCSPI_RX_FLUSH:
+
+ case CCSPI_REFLEX:
+ debugstr("Beta implementation.");
+ cmddata[0] = 1;
+ txdata(app,verb,cmddata[0]+1);
+
+ while(1) {
+ //Wait until a packet is received
+ while(!SFD);
+ //Turn on LED 2 (green) as signal
+ PLED2DIR |= PLED2PIN;
+ PLED2OUT &= ~PLED2PIN;
+
+ //Switch the radio to TX mode
+ CLRSS; //Drop !SS to begin transaction.
+ ccspitrans8(0x04);
+ SETSS; //Raise !SS to end transaction.
+ //txdata(app,verb,len);
+
+ //Load the packet.
+ CLRSS;
+ ccspitrans8(CCSPI_TXFIFO);
+ char pkt[15] = {0x0f, 0x01, 0x08, 0x82, 0xff, 0xff, 0xff, 0xff, 0xde, 0xad, 0xbe, 0xef, 0xba, 0xbe, 0xc0};
+ for(i=0;i<pkt[0];i++)
+ ccspitrans8(pkt[i]);
+ SETSS;
+ debugstr("Packet loaded for tx.");
+ //Transmit the packet.
+ CLRSS;
+ ccspitrans8(0x04); //STXON
+ SETSS;
+ //Wait for the pulse on SFD, after which the packet has been sent.
+ //while(!SFD);
+ //while(SFD);
+ msdelay(300);
+ //Flush TX buffer.
+ CLRSS;
+ ccspitrans8(0x09); //SFLUSHTX
+ SETSS;
+
+ //while(SFD);
+ //msdelay(200);
+ //Turn off LED 2 (green) as signal
+ PLED2DIR |= PLED2PIN;
+ PLED2OUT |= PLED2PIN;
+ }
+ //TODO the firmware stops staying in this mode after a while, and stops jamming... need to find a fix!
+ break;
+
+ case CCSPI_TX_FLUSH:
//Flush the buffer.
CLRSS;
- ccspitrans8(CCSPI_FLUSH_RX);
+ ccspitrans8(CCSPI_SFLUSHTX);
SETSS;
- //Return the packet.
- txdata(app,verb,32);
+ txdata(app,verb,0);
break;
case CCSPI_TX:
- case CCSPI_TX_FLUSH:
+#ifdef FIFOP
+
+ //Wait for last packet to TX.
+ //while(ccspi_status()&BIT3);
+
+ //Load the packet.
+ CLRSS;
+ ccspitrans8(CCSPI_TXFIFO);
+ for(i=0;i<cmddata[0];i++)
+ ccspitrans8(cmddata[i]);
+ SETSS;
+
+ //Transmit the packet.
+ CLRSS;
+ ccspitrans8(0x04); //STXON
+ SETSS;
+
+ //Wait for the pulse on SFD, after which the packet has been sent.
+ while(!SFD);
+ while(SFD);
+
+ //Flush TX buffer.
+ CLRSS;
+ ccspitrans8(0x09); //SFLUSHTX
+ SETSS;
+
+ txdata(app,verb,0);
+#else
+ debugstr("Can't TX a packet with SFD and FIFOP definitions.");
+ txdata(app,NOK,0);
+#endif
+ break;
default:
- debugstr("Not yet supported.");
+ debugstr("Not yet supported in CCSPI");
txdata(app,verb,0);
break;
}
- SETSS;//End session
- RADIOACTIVE;
}
projects / goodfet / blobdiff