Move coolant temp to floating point.

a179.c

@@ -35,20 +35,25 @@
 
 #define STREAM A179
 #define STREAM_WORDS 23
-#define VERSION 0
 
-static const int8_t A179_coolant_temp_table[] = {
+static const float A179_coolant_temp_table[] = {
         [0]  = 200,
         [12] = 150,
         [13] = 145,
         [14] = 140,
+	[15] = 137.5, //
         [16] = 135,
+	[17] = 132.5, //
         [18] = 130,
         [21] = 125,
         [23] = 120,
         [26] = 115,
         [30] = 110,
         [34] = 105,
+	[35] = 104, //
+	[36] = 103, //
+	[37] = 102, //
+	[38] = 101, //
         [39] = 100,
         [44] = 95,
         [50] = 90,
@@ -70,19 +75,25 @@ static const int8_t A179_coolant_temp_table[] = {
         [218] = 10,
         [225] = 5,
         [231] = 0,
+// 232, 233, 234, 235, 236
         [237] = -5,
+// 238, 239, 240
         [241] = -10,
+// 242, 242, 243, 244,
         [245] = -15,
+	[246] = -17.5, //
         [247] = -20,
+// 248, 249
         [250] = -25,
         [251] = -30,
+	[252] = -35, //
         [253] = -40,
+	[254] = -50, //
+	[255] = -60, //
 };
 
 void aldl_a179_callback(uint8_t *data, int datalen)
 {
-    printf("! %d\n", datalen); // XXX indicate!
-
     /* Decode */
     decoded.heartbeat = !decoded.heartbeat;
 
@@ -126,5 +137,4 @@ void aldl_a179_callback(uint8_t *data, int datalen)
     decoded.fuelp_v = (float)data[20] / 10;
     decoded.idle_tgt = (float)data[21] * 12.5;
     decoded.tp = (float)data[22] / 2.55;
-
 }

aldl.c

@@ -89,23 +89,29 @@ void isrfn(void)
   ALDLSR |= (val & 1);
 
   if ((ALDLSR & SYNC_WORD) == SYNC_WORD) {
+    /* Received a sync word.. */
     ALDLSR = 0;
     if (!gotsync) {
         gotsync = 1;
 	return;  /* First one, we don't do anything */
     }
-    printf(" - %d\n", datalen);
     /* New sync word, we've finished a sequence */
+    printf(" - %d\n", datalen);
+
+    /* Process ALDL payload */
     if (aldl_callback)
 	aldl_callback(data, datalen);
+    /* Log data */
     if (datalog_handle)
         aldl_datalog(data, datalen);
+    /* Reset state */
     bits = 0;
     datalen = 0;
   } else if (++bits == 9) {
     printf(" %02x", ALDLSR & 0xFF);
     /* Just latch in the word */
     data[datalen++] = ALDLSR & 0xff;
+    /* Reset state */
     bits = 0;
     ALDLSR = 0;
   }

aldl.h

@@ -50,7 +50,6 @@ struct stream_common {
 	/* Raw data */
 	uint16_t mph;  /* Miles per hour */
 	uint16_t rpm;  /* Revolutions per minute */
-	int16_t  coolant_temp_c;  /* Coolant temperature */
 	uint16_t tp;  /* Throttle Position, percent */
 	uint16_t iac_steps;
 	uint16_t idle_tgt;  /* Idle target RPM */
@@ -66,7 +65,7 @@ struct stream_common {
 	float o2_v; /* O2 sensor, Voltage */
 
 	/* Derived data */
-
+	float  coolant_temp_c;  /* Coolant temperature */
 	uint16_t running;  /* non-zero if engine running */
 	uint16_t driving;  /* non-zero if moving */
 	uint16_t idling;   /* 1 = first idle, 2 = regular */

aldl_pi.c

@@ -60,21 +60,24 @@ int main (int argc, char **argv)
   wiringPiSetup();
 
   /* Set highest possible priority */
-  piHiPri(99);
+//  piHiPri(99);
 
   /* Set up RPi GPIO */
   pinMode(ALDL_PIN_IN, INPUT);
   pullUpDnControl(ALDL_PIN_IN, PUD_DOWN);
   wiringPiISR (ALDL_PIN_IN, INT_EDGE_FALLING, &isrfn);
 
+  /* Initialize datalogging */
   datalog_init(datalog_fname);
 
+  /* Initialize dashboard */
   if (init_dash())
 	  return -1;
 
+  /* No point in updating the display more than once a second */
   while(run) {
-	run = render_dash();
 	sleep(1);
+	run = render_dash();
   }
 
   datalog_close();

sdldash.c

@@ -178,7 +178,7 @@ int render_dash(void) {
 	/* Draw variable text */
 	RENDER_TEXT_1ARG(i, 10, 50, textcolor, "%03u  MPH", decoded.mph);
 	RENDER_TEXT_1ARG(i, 10, 70, textcolor, "%04d RPM", decoded.rpm);
-	RENDER_TEXT_1ARG(i, 10, 90, textcolor, "%03d  C", decoded.coolant_temp_c);
+	RENDER_TEXT_1ARG(i, 10, 90, textcolor, "%03.1f C", decoded.coolant_temp_c);
 	RENDER_TEXT_1ARG(i, 10, 110, textcolor, "%03u%% TP", decoded.tp);
 
 	if (decoded.idling) {