altos: Restructure altos build to prepare for multi-arch support

Split out sources into separate directories:

	core:		architecture and product independent bits
	cc1111:		cc1111-specific code
	drivers:	architecture independent drivers
	product:	product-specific sources and Makefile fragments
	util:		scripts for building stuff

This should have no effect on the built products, but testing is encouraged

Signed-off-by: Keith Packard <keithp@keithp.com>

1 files changed, 0 insertions, 283 deletions

diff --git a/src/make-altitude b/src/make-altitude
deleted file mode 100644
index 716aa8a8..00000000
--- a/src/make-altitude
+++ /dev/null
@@ -1,283 +0,0 @@
-#!/usr/bin/nickle -f
-/*
- * Pressure Sensor Model, version 1.1
- *
- * written by Holly Grimes
- *
- * Uses the International Standard Atmosphere as described in
- *   "A Quick Derivation relating altitude to air pressure" (version 1.03)
- *    from the Portland State Aerospace Society, except that the atmosphere
- *    is divided into layers with each layer having a different lapse rate.
- *
- * Lapse rate data for each layer was obtained from Wikipedia on Sept. 1, 2007
- *    at site <http://en.wikipedia.org/wiki/International_Standard_Atmosphere
- *
- * Height measurements use the local tangent plane.  The postive z-direction is up.
- *
- * All measurements are given in SI units (Kelvin, Pascal, meter, meters/second^2).
- *   The lapse rate is given in Kelvin/meter, the gas constant for air is given
- *   in Joules/(kilogram-Kelvin).
- */
-
-const real GRAVITATIONAL_ACCELERATION = -9.80665;
-const real AIR_GAS_CONSTANT = 287.053;
-const int NUMBER_OF_LAYERS = 7;
-const real MAXIMUM_ALTITUDE = 84852;
-const real MINIMUM_PRESSURE = 0.3734;
-const real LAYER0_BASE_TEMPERATURE = 288.15;
-const real LAYER0_BASE_PRESSURE = 101325;
-
-/* lapse rate and base altitude for each layer in the atmosphere */
-const real[NUMBER_OF_LAYERS] lapse_rate = {
-	-0.0065, 0.0, 0.001, 0.0028, 0.0, -0.0028, -0.002
-};
-const int[NUMBER_OF_LAYERS] base_altitude = {
-	0, 11000, 20000, 32000, 47000, 51000, 71000
-};
-
-
-/* outputs atmospheric pressure associated with the given altitude. altitudes
-   are measured with respect to the mean sea level */
-real altitude_to_pressure(real altitude) {
-
-   real base_temperature = LAYER0_BASE_TEMPERATURE;
-   real base_pressure = LAYER0_BASE_PRESSURE;
-
-   real pressure;
-   real base; /* base for function to determine pressure */
-   real exponent; /* exponent for function to determine pressure */
-   int layer_number; /* identifies layer in the atmosphere */
-   int delta_z; /* difference between two altitudes */
-
-   if (altitude > MAXIMUM_ALTITUDE) /* FIX ME: use sensor data to improve model */
-      return 0;
-
-   /* calculate the base temperature and pressure for the atmospheric layer
-      associated with the inputted altitude */
-   for(layer_number = 0; layer_number < NUMBER_OF_LAYERS - 1 && altitude > base_altitude[layer_number + 1]; layer_number++) {
-      delta_z = base_altitude[layer_number + 1] - base_altitude[layer_number];
-      if (lapse_rate[layer_number] == 0.0) {
-         exponent = GRAVITATIONAL_ACCELERATION * delta_z
-              / AIR_GAS_CONSTANT / base_temperature;
-         base_pressure *= exp(exponent);
-      }
-      else {
-         base = (lapse_rate[layer_number] * delta_z / base_temperature) + 1.0;
-         exponent = GRAVITATIONAL_ACCELERATION /
-              (AIR_GAS_CONSTANT * lapse_rate[layer_number]);
-         base_pressure *= pow(base, exponent);
-      }
-      base_temperature += delta_z * lapse_rate[layer_number];
-   }
-
-   /* calculate the pressure at the inputted altitude */
-   delta_z = altitude - base_altitude[layer_number];
-   if (lapse_rate[layer_number] == 0.0) {
-      exponent = GRAVITATIONAL_ACCELERATION * delta_z
-           / AIR_GAS_CONSTANT / base_temperature;
-      pressure = base_pressure * exp(exponent);
-   }
-   else {
-      base = (lapse_rate[layer_number] * delta_z / base_temperature) + 1.0;
-      exponent = GRAVITATIONAL_ACCELERATION /
-           (AIR_GAS_CONSTANT * lapse_rate[layer_number]);
-      pressure = base_pressure * pow(base, exponent);
-   }
-
-   return pressure;
-}
-
-
-/* outputs the altitude associated with the given pressure. the altitude
-   returned is measured with respect to the mean sea level */
-real pressure_to_altitude(real pressure) {
-
-   real next_base_temperature = LAYER0_BASE_TEMPERATURE;
-   real next_base_pressure = LAYER0_BASE_PRESSURE;
-
-   real altitude;
-   real base_pressure;
-   real base_temperature;
-   real base; /* base for function to determine base pressure of next layer */
-   real exponent; /* exponent for function to determine base pressure
-                             of next layer */
-   real coefficient;
-   int layer_number; /* identifies layer in the atmosphere */
-   int delta_z; /* difference between two altitudes */
-
-   if (pressure < 0)  /* illegal pressure */
-      return -1;
-   if (pressure < MINIMUM_PRESSURE) /* FIX ME: use sensor data to improve model */
-      return MAXIMUM_ALTITUDE;
-
-   /* calculate the base temperature and pressure for the atmospheric layer
-      associated with the inputted pressure. */
-   layer_number = -1;
-   do {
-      layer_number++;
-      base_pressure = next_base_pressure;
-      base_temperature = next_base_temperature;
-      delta_z = base_altitude[layer_number + 1] - base_altitude[layer_number];
-      if (lapse_rate[layer_number] == 0.0) {
-         exponent = GRAVITATIONAL_ACCELERATION * delta_z
-              / AIR_GAS_CONSTANT / base_temperature;
-         next_base_pressure *= exp(exponent);
-      }
-      else {
-         base = (lapse_rate[layer_number] * delta_z / base_temperature) + 1.0;
-         exponent = GRAVITATIONAL_ACCELERATION /
-              (AIR_GAS_CONSTANT * lapse_rate[layer_number]);
-         next_base_pressure *= pow(base, exponent);
-      }
-      next_base_temperature += delta_z * lapse_rate[layer_number];
-   }
-   while(layer_number < NUMBER_OF_LAYERS - 1 && pressure < next_base_pressure);
-
-   /* calculate the altitude associated with the inputted pressure */
-   if (lapse_rate[layer_number] == 0.0) {
-      coefficient = (AIR_GAS_CONSTANT / GRAVITATIONAL_ACCELERATION)
-                                                    * base_temperature;
-      altitude = base_altitude[layer_number]
-                    + coefficient * log(pressure / base_pressure);
-   }
-   else {
-      base = pressure / base_pressure;
-      exponent = AIR_GAS_CONSTANT * lapse_rate[layer_number]
-                                       / GRAVITATIONAL_ACCELERATION;
-      coefficient = base_temperature / lapse_rate[layer_number];
-      altitude = base_altitude[layer_number]
-                      + coefficient * (pow(base, exponent) - 1);
-   }
-
-   return altitude;
-}
-
-real feet_to_meters(real feet)
-{
-    return feet * (12 * 2.54 / 100);
-}
-
-real meters_to_feet(real meters)
-{
-    return meters / (12 * 2.54 / 100);
-}
-
-/*
- * Values for our MP3H6115A pressure sensor
- *
- * From the data sheet:
- *
- * Pressure range: 15-115 kPa
- * Voltage at 115kPa: 2.82
- * Output scale: 27mV/kPa
- *
- *
- * 27 mV/kPa * 2047 / 3300 counts/mV = 16.75 counts/kPa
- * 2.82V * 2047 / 3.3 counts/V = 1749 counts/115 kPa
- */
-
-real counts_per_kPa = 27 * 2047 / 3300;
-real counts_at_101_3kPa = 1674;
-
-real fraction_to_kPa(real fraction)
-{
-	return (fraction + 0.095) / 0.009;
-}
-
-
-real count_to_kPa(real count) = fraction_to_kPa(count / 2047);
-
-typedef struct {
-	real m, b;
-	int m_i, b_i;
-} line_t;
-
-line_t best_fit(real[] values, int first, int last) {
-       real sum_x = 0, sum_x2 = 0, sum_y = 0, sum_xy = 0;
-       int n = last - first + 1;
-       real m, b;
-       int m_i, b_i;
-
-       for (int i = first; i <= last; i++) {
-	       sum_x += i;
-	       sum_x2 += i**2;
-	       sum_y += values[i];
-	       sum_xy += values[i] * i;
-       }
-       m = (n*sum_xy - sum_y*sum_x) / (n*sum_x2 - sum_x**2);
-       b = sum_y/n - m*(sum_x/n);
-       return (line_t) { m = m, b = b };
-}
-
-real count_to_altitude(real count) {
-     return pressure_to_altitude(count_to_kPa(count) * 1000);
-}
-
-real fraction_to_altitude(real frac) = pressure_to_altitude(fraction_to_kPa(frac) * 1000);
-
-int num_samples = 1024;
-
-real[num_samples] alt = { [n] = fraction_to_altitude(n/(num_samples - 1)) };
-
-int num_part = 128;
-int seg_len = num_samples / num_part;
-
-line_t [dim(alt) / seg_len] fit = {
-	[n] = best_fit(alt, n * seg_len, n * seg_len + seg_len - 1)
-};
-
-int[num_samples/seg_len + 1]	alt_part;
-
-alt_part[0] = floor (fit[0].b + 0.5);
-alt_part[dim(fit)] = floor(fit[dim(fit)-1].m * dim(fit) * seg_len + fit[dim(fit)-1].b + 0.5);
-
-for (int i = 0; i < dim(fit) - 1; i++) {
-	real	here, there;
-	here = fit[i].m * (i+1) * seg_len + fit[i].b;
-	there = fit[i+1].m * (i+1) * seg_len + fit[i+1].b;
-	alt_part[i+1] = floor ((here + there) / 2 + 0.5);
-}
-
-real count_to_fit_altitude(int count) {
-	int	sub = count // seg_len;
-	int	off = count % seg_len;
-	line_t	l = fit[sub];
-	real r_v;
-	real i_v;
-
-	r_v = count * l.m + l.b;
-	i_v = (alt_part[sub] * (seg_len - off) + alt_part[sub+1] * off) / seg_len;
-	return i_v;
-}
-
-real max_error = 0;
-int max_error_count = 0;
-real total_error = 0;
-
-for (int count = 0; count < num_samples; count++) {
-	real	kPa = fraction_to_kPa(count / (num_samples - 1));
-	real	meters = pressure_to_altitude(kPa * 1000);
-
-	real	meters_approx = count_to_fit_altitude(count);
-	real	error = abs(meters - meters_approx);
-
-	total_error += error;
-	if (error > max_error) {
-		max_error = error;
-		max_error_count = count;
-	}
-#	printf ("	%7d,	/* %6.2g kPa %5d count approx %d */\n",
-#		floor (meters + 0.5), kPa, count, floor(count_to_fit_altitude(count) + 0.5));
-}
-
-printf ("/*max error %f at %7.3f%%. Average error %f*/\n", max_error, max_error_count / (num_samples - 1) * 100, total_error / num_samples);
-
-printf ("#define NALT %d\n", dim(alt_part));
-printf ("#define ALT_FRAC_BITS %d\n", floor (log2(32768/(dim(alt_part)-1)) + 0.1));
-
-for (int i = 0; i < dim(alt_part); i++) {
-	real fraction = i / (dim(alt_part) - 1);
-	real kPa = fraction_to_kPa(fraction);
-	printf ("%9d, /* %6.2f kPa %7.3f%% */\n",
-		alt_part[i], kPa, fraction * 100);
-}