105 lines
2.5 KiB
C
105 lines
2.5 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdarg.h>
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#include <inttypes.h>
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#include <sys/time.h>
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#include <ncurses.h>
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#include <hexagram/can.h>
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static int usage(int argc, char **argv, const char *message, ...) {
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if (message) {
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va_list args;
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va_start(args, message);
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vfprintf(stderr, message, args);
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va_end(args);
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}
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fprintf(stderr, "usage: %s canif\n", argv[0]);
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return 1;
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}
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int main(int argc, char **argv) {
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WINDOW *win;
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hexagram_can_if *can_if;
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struct can_frame frame;
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uint8_t last_gear = 0;
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struct timeval now, last;
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if (argc != 2) {
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return usage(argc, argv, NULL);
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}
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if ((can_if = hexagram_can_if_open(argv[1])) == NULL) {
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perror("hexagram_can_if_open()");
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goto error_can_if_open;
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}
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gettimeofday(&now, NULL);
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memcpy(&last, &now, sizeof(now));
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initscr();
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win = newwin(LINES, COLS, 0, 0);
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while (hexagram_can_if_read(can_if, &frame) >= 0) {
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gettimeofday(&now, NULL);
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char lever_states[16] = " PRNDS ";
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char manual_gears[16] = " 123456 ";
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if (frame.can_id == 0x280) {
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double rpm = 0.25 * (double)(frame.data[2] | (frame.data[3] << 8));
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wmove(win, 1, 0);
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wprintw(win, "%6.1lf RPM\n", rpm);
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} else if (frame.can_id == 0x540) {
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if (frame.data[7] != last_gear) {
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wmove(win, 3, 8);
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if ((frame.data[7] & 0xc) == 0xc) {
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wprintw(win, " %c\n",
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manual_gears[(frame.data[7] & 0xf0) >> 4]);
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} else {
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wprintw(win, "%c \n",
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lever_states[(frame.data[7] & 0xf0) >> 4]);
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}
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last_gear = frame.data[7];
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}
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} else if (frame.can_id == 0x5a0) {
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/*
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* Speed is expressed in units of 0.002 wheel cycles per second
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*/
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double rps = 0.001 * (double)(((uint16_t)frame.data[1] >> 1)
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| ((uint16_t)frame.data[2] << 8));
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double kph = (2.032 * rps * 3600) / 1000.0;
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wmove(win, 2, 0);
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wprintw(win, "%6.1lf kph", kph);
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}
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if (((now.tv_sec * 1000000) + now.tv_usec) - ((last.tv_sec * 1000000) + last.tv_usec) > 100000) {
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memcpy(&last, &now, sizeof(now));
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wrefresh(win);
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}
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}
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hexagram_can_if_close(can_if);
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return 0;
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error_can_if_open:
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return 1;
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}
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