aldl_pi/a179.c

/*
 *   ALDL Dashboard, A179 stream decoder
 *
 *   (c) 2019 Solomon Peachy <pizza@shaftnet.org>
 *
 *   The latest version of this program can be found at:
 *
 *     http://git.shaftnet.org/cgit/users/pizza/public/aldl_pi.git
 *
 *   This program is free software; you can redistribute it and/or modify it
 *   under the terms of the GNU General Public License as published by the Free
 *   Software Foundation; either version 3 of the License, or (at your option)
 *   any later version.
 *
 *   This program is distributed in the hope that it will be useful, but
 *   WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 *   or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 *   for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 *
 *          [http://www.gnu.org/licenses/gpl-3.0.html]
 *
 *   SPDX-License-Identifier: GPL-3.0+
 *
 */

#include <stdio.h>
#include <stdint.h>
#include <unistd.h>

#include "aldl.h"

#define STREAM A179
#define STREAM_WORDS 23

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,
        [56] = 85,
        [64] = 80,
        [72] = 75,
        [81] = 70,
        [92] = 65,
        [102] = 60,
        [114] = 55,
        [126] = 50,
        [139] = 45,
        [152] = 40,
        [165] = 35,
        [177] = 30,
        [189] = 25,
        [199] = 20,
        [209] = 15,
        [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)
{
    /* Decode */
    decoded.heartbeat = !decoded.heartbeat;

//	data[0];  // MW2
    decoded.idling = data[0] & 0x80 ? (data[0] & 0x40 ? 1 : 2 ) : 0;
    decoded.running = data[0] & 0x04;
    decoded.driving = data[0] & 0x01;

    decoded.prom_id = data[1] | (data[2] << 8);

    decoded.iac_steps = data[3];
    decoded.coolant_temp_c = A179_coolant_temp_table[data[4]];
    decoded.mph = data[5];
    decoded.map_v = (float)((int)data[6] * 5) / 255;
    decoded.rpm = data[7] * 25;
    decoded.tps_v = (float)((int)data[8] * 5) / 255;
    decoded.base_fuel = data[9];
    decoded.o2_v =  (float)((int)data[10] * 1000) / 226 / 1000;

    decoded.mil = data[11] | (data[12] << 8) | (data[13] << 16);

//	data[14]; // MWAF
    decoded.learn_req = data[14] & 0x02;
    decoded.closed_loop = data[14] & 0x80;
    decoded.closed_loop_idle = data[14] & 0x10;
    decoded.rich_lean = data[14] & 0x40;

    decoded.battery_v = (float)data[15] / 10;

//    data[16]; // MCU2IO

    decoded.overspeed = data[6] & 0x04;
    decoded.shift_req = data[6] & 0x08;
    decoded.neutral = data[6] & 0x10;
    decoded.top_gear = data[6] & 0x20;
    decoded.ac_request = data[6] & 0x80;

    decoded.knock_count = data[17];
    decoded.corr_fuel = data[18];
    decoded.o2_transitions = data[19];
    decoded.fuelp_v = (float)data[20] / 10;
    decoded.idle_tgt = (float)data[21] * 12.5;
    decoded.tp = (float)data[22] / 2.55;
}