Beginnings of codeplug support. #50

firmware/Makefile

@@ -5,7 +5,7 @@ CC = msp430-gcc -mmcu=cc430f6137 -Wall -I. -Os
 BSL = ../bin/cc430-bsl.py
 
 modules=rtcasm.o main.o lcd.o lcdtext.o rtc.o  keypad.o apps.o sidebutton.o radio.o power.o \
-	dmesg.o \
+	dmesg.o codeplug.o \
 	libs/assembler.o libs/morse.o
 apps= apps/clock.o apps/rpn.o apps/hex.o apps/stopwatch.o \
 	apps/morse.o apps/rssi.o
@@ -36,3 +36,6 @@ dmesg:
 run:
 	sleep 5
 	../bin/cc430-bsl.py -P goodwatch.hex -uD
+
+codeplug.hex: codeplug.txt
+	../bin/goodwatch-txt2cp.py -i codeplug.txt -o codeplug.hex

firmware/api.h

@@ -21,6 +21,7 @@
 #include "sidebutton.h"
 #include "radio.h"
 #include "power.h"
+#include "codeplug.h"
 #include "gittag.h" //Autogenerated
 
 //Handy libraries.  These are tested host-side.

firmware/apps.h

@@ -1,5 +1,4 @@
 /*! \file apps.h
-  
   \brief These are functions for working with applications and the task switcher.
 
  */

firmware/codeplug.c

@@ -0,0 +1,49 @@
+/*! \file codeplug.c
+  \brief Codeplug for stored radio frequencies.
+  
+  The codeplug itself is stored in info flash at 0x1800, as a sequence
+  of twelve-byte entries as defined in codeplug.h.
+*/
+
+#include "codeplug.h"
+#include "radio.h"
+
+//! Array of codeplug entries in info flash.
+struct codeplugentry *codeplug = (struct codeplugentry*) 0x1800;
+
+//! Index of entry in the codeplug.
+static int codeplugi=0;
+
+//! Next codeplug entry.
+void codeplug_next(){
+  if(codeplug[++codeplugi].flags==0xFF)
+    codeplugi=0;
+}
+
+//! Previous codeplug entry.
+void codeplug_prev(){
+  /* If we run beneath the beginning of the codeplug, we need to walk
+     all the way to the end and then back one.
+   */
+  if(--codeplugi<0){
+    //Walk to the end.
+    while(codeplug[++codeplugi].flags!=0xFF);
+    //Jump back one.
+    codeplug--;
+  }
+}
+
+//! Return the name of the codeplug entry.  8 bytes, no null terminator!
+const char *codeplug_name(){
+  return codeplug[codeplugi].name;
+}
+
+//! Sets the codeplug frequency.
+void codeplug_setfreq(){
+  radio_setrawfreq(
+		   codeplug[codeplugi].freq2,
+		   codeplug[codeplugi].freq1,
+		   codeplug[codeplugi].freq0);
+}
+
+

firmware/codeplug.h

@@ -0,0 +1,33 @@
+/*! \file codeplug.h
+  \brief Codeplug for stored radio frequencies.
+*/
+
+#include <stdint.h>
+
+#define CODEPLUGLEN 512
+
+//! Single entry in the codeplug database.
+struct codeplugentry {
+  /* The flags byte is undefined; keep at zero for now. */
+  const uint8_t flags;
+  
+  /* The frequency is stored in the CC1101-based radio's internal
+     format.  See radio.c for example calculations.
+   */
+  const uint8_t freq2;
+  const uint8_t freq1;
+  const uint8_t freq0;
+
+  /* The eight character name is *NOT* null terminated. */
+  const char name[8];
+};
+
+//! Next codeplug entry.
+void codeplug_next();
+//! Previous codeplug entry.
+void codeplug_prev();
+
+//! Return the name of the codeplug entry.  8 bytes, no null terminator!
+const char *codeplug_name();
+//! Sets the codeplug frequency.
+void codeplug_setfreq();

firmware/codeplug.txt

@@ -0,0 +1,11 @@
+# Example GoodWatch codeplug.
+# freq name [flags]
+
+#Handy frequencies in our band.
+433.000 433.00
+433.450 433.45
+434.000 434.00
+
+#DMR Simplex, slightly out of band.
+441.000 DMR441.0
+

firmware/radio.c

@@ -52,6 +52,19 @@ void radio_setfreq(float freq){
   while(radio_getstate()!=1);
 }
 
+//! Sets the raw radio frequency registers.
+void radio_setrawfreq(uint8_t freq2, uint8_t freq1, uint8_t freq0){
+  //Store the frequency.
+  radio_writereg(FREQ2, freq2);
+  radio_writereg(FREQ1, freq1);
+  radio_writereg(FREQ0, freq0);
+
+  //Strobe a calibration to make it count.
+  radio_strobe(RF_SCAL);
+  //Wait for it to take effect.
+  while(radio_getstate()!=1);
+}
+
 //! Gets the radio frequency.
 uint32_t radio_getfreq(){
   static uint32_t oldhex=0, oldnum=0;

firmware/radio.h

@@ -54,6 +54,8 @@ int radio_on();
 
 //! Sets the radio frequency.
 void radio_setfreq(float freq);
+//! Sets the raw radio frequency registers.
+void radio_setrawfreq(uint8_t freq2, uint8_t freq1, uint8_t freq0);
 //! Gets the radio frequency.
 uint32_t radio_getfreq();