--- a/main.c	Wed Jan 21 16:37:32 2009 +1030
+++ b/main.c	Wed Jan 21 18:01:17 2009 +1030
@@ -1,7 +1,7 @@
 /*
- * Test various AVR bits and pieces
+ * Monitor fermenter temperature and control it by switching cooler & heater.
  *
- * Copyright (c) 2008
+ * Copyright (c) 2009
  *      Daniel O'Connor <darius@dons.net.au>.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -38,9 +38,6 @@
 
 #include "cons.h"
 #include "1wire.h"
-#ifdef WITHUSB
-#include "usb.h"
-#endif
 #include "tempctrl.h"
 #include "ds1307.h"
 
@@ -74,22 +71,12 @@
     MCUCSR |= _BV(JTD);
 #endif
 
-#ifdef WITHUSB
-    /* USB data bus (7:0) */
-    DDRA = 0x00;
-    PORTA = 0x00;
-    
-    /* USB control (4:0) */
-    DDRB = 0x0d;
-    PORTB = 0x00;
-#else
     DDRA = 0xff;
     PORTA = 0x00;
 
     DDRB = 0x00;
     PORTB = 0x00;
 
-#endif    
     /* GPIO (0:7) */
     DDRC = 0xff;
     PORTC = 0x00;
@@ -98,7 +85,6 @@
     DDRD = 0xf7;
     PORTD = 0xf7;
 
-#ifndef WITHUSB
     /* Beep
      *
      * Fpwm = Fclk / (N * 510)
@@ -110,7 +96,6 @@
      * Phase correct PWM, non-inverted output, divide by 8 */
     TCCR0 = _BV(WGM00) | _BV(WGM11) | _BV(COM00) | _BV(COM01) | _BV(CS01);
     OCR0 = 128;
-#endif
 
     /* Set up the one wire stuff */
     OWInit();
@@ -153,12 +138,6 @@
      */
     wdt_enable(WDTO_2S);
 
-#ifdef WITHUSB
-    printf_P(PSTR("Calling usb_init\r\n"));
-    usb_init();
-    printf_P(PSTR("done\r\n"));
-    _delay_us(1000);
-#endif
     printf_P(PSTR("> "));
     cmd.state = 0;
     
@@ -174,11 +153,6 @@
 	    /* Allow new characters to be processed */
 	    cmd.state = 0;
 	}
-	
-#ifdef WITHUSB
-	if (!(PDICTL & _BV(PDIINT)))
-	    usb_intr();
-#endif
     }
 }
 
@@ -211,9 +185,6 @@
 		      "zz               Reset MCU\r\n"
 		      "gc               Get time of day\r\n"
 		      "sc time          Set time of day (time is YYYY/MM/DD HH:MM:SS)\r\n"
-#ifdef WITHUSB
-		      "us               Generate USB data\r\n"
-#endif
 		      "tc ...           Temperature control related (tc help for more)\r\n"));
 	
 	return;
@@ -552,10 +523,6 @@
 	}
     } else if (!strncasecmp_P((char *)cmd.buf, PSTR("tc"), 2)) {
 	tempctrl_cmd((char *)cmd.buf);
-#ifdef WITHUSB
-    } else if (!strncasecmp_P((char *)cmd.buf, PSTR("us"), 2)) {
-	usb_gendata();
-#endif
     } else if (!strncasecmp_P((char *)cmd.buf, PSTR("gc"), 2)) {
 	ds1307_printtime(PSTR(""), PSTR("\r\n"));
     } else if (!strncasecmp_P((char *)cmd.buf, PSTR("sc"), 2)) {

--- a/tempctrl.c	Wed Jan 21 16:37:32 2009 +1030
+++ b/tempctrl.c	Wed Jan 21 18:01:17 2009 +1030
@@ -1,7 +1,7 @@
 /*
  * Temperature control logic
  *
- * Copyright (c) 2008
+ * Copyright (c) 2009
  *      Daniel O'Connor <darius@dons.net.au>.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -81,10 +81,8 @@
     int16_t	check_interval;
     int16_t	stale_factor;
 
-#ifndef WITHUSB
     /* Beep if stale */
     int8_t	dobeep;
-#endif
 } __attribute__((packed)) settings_t;
 
 /* Current settings in RAM */
@@ -115,17 +113,13 @@
     .idlebits = 0x00,
     .check_interval = 10,
     .stale_factor = 3,
-#ifndef WITHUSB
     .dobeep = 0
-#endif
 };
 
 /* Local variable declarations */
 volatile static time_t	now;
-#ifndef WITHUSB
 volatile static uint8_t beeping = 0;
 volatile static uint8_t lasttoggle = 0;
-#endif
 
 /* Local function prototypes */
 static void		tempctrl_load_or_init_settings(void);
@@ -176,7 +170,6 @@
 	now.sec++;
     }
 
-#ifndef WITHUSB
     if (beeping) {
 	lasttoggle++;
 	// 63 * 8ms = ~0.5s
@@ -188,7 +181,6 @@
 	DDRB &= ~_BV(PB3);
 	lasttoggle = 0;
     }
-#endif    
 }
 
 /* 
@@ -296,13 +288,11 @@
     if (stale)
 	nextstate = 'i';
     
-#ifndef WITHUSB
 /* Handle beeping */
     if (settings.dobeep && stale)
 	beeping = 1;
     else
 	beeping = 0;
-#endif
 	
     /* Handle state forcing */
     if (settings.mode != TC_MODE_AUTO)
@@ -482,9 +472,7 @@
 		     "                 h    Always heat\r\n"
 		     "                 i    Always idle\r\n"
 		     "                 n    Like idle but don't log anything\r\n"
-#ifndef WITHUSB
 		     "tc beep [01]    Enable/disable beeping when data is stale\r\n"
-#endif
 		     "tc X Y          Set X to Y where X is one of\r\n"
 		     "                 targ Target temperature\r\n"
 		     "                 hys  Hysteresis range\r\n"
@@ -524,9 +512,7 @@
 		      "Min heat overshoot - %d, Min cool overshoot - %d\r\n"
 		      "Min cool on time - %d, Min cool off time - %d\r\n"
 		      "Min heat on time - %d, Min heat off time - %d\r\n"
-#ifndef WITHUSB
 		      "Beep on stale - %S\r\n"
-#endif
 		     ),
 		 settings.fermenter_ROM[0], settings.fermenter_ROM[1], settings.fermenter_ROM[2], settings.fermenter_ROM[3], 
 		 settings.fermenter_ROM[4], settings.fermenter_ROM[5], settings.fermenter_ROM[6], settings.fermenter_ROM[7], 
@@ -538,9 +524,7 @@
 		 settings.minheatovershoot, settings.mincoolovershoot,
 		 settings.mincoolontime, settings.minheatontime,
 		 settings.minheatontime, settings.minheatofftime,
-#ifndef WITHUSB
 		 settings.dobeep ? PSTR("yes") : PSTR("no")
-#endif
 	    );
 	return;
     }
@@ -560,7 +544,6 @@
 	}
 	return;
     }
-#ifndef WITHUSB
     if (!strcasecmp_P(cmd, PSTR("beep"))) {
 	if (buf[8] == '1' || buf[8] == 'y')
 	    settings.dobeep = 1;
@@ -570,7 +553,6 @@
 	    printf_P(PSTR("Expected a y/1 or n/0\r\n"));
 	return;
     }
-#endif
     if (!strcasecmp_P(cmd, PSTR("ferm")) ||
 	!strcasecmp_P(cmd, PSTR("frg")) ||
 	!strcasecmp_P(cmd, PSTR("amb"))) {