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*drive-thru whale* Sever your leg please, sir.

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XANTRONIX Development 2019-06-06 23:31:26 -05:00
parent 185809113e
commit 1197783a70
1 changed files with 46 additions and 28 deletions
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74
examples/cluster.c
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@ -3,9 +3,19 @@
#include <string.h>
#include <math.h>
#include <sys/time.h>
#include <hexagram/can.h>
#include <hexagram/window.h>
typedef struct _hexagram_cluster_state {
double rpm, rps, temp, level;
} hexagram_cluster_state;
static hexagram_cluster_state state = {
0, 0, 0, 0
};
static void draw_needle(cairo_t *cr,
double x,
double y,
@ -266,9 +276,9 @@ static void draw_mfd(cairo_t *cr,
cairo_stroke(cr);
}
static void draw_gauge_cluster_bg(cairo_t *cr,
double width,
double height) {
static void cluster_draw_bg(cairo_t *cr,
double width,
double height) {
/*
* Paint canvas black
*/
@ -302,62 +312,57 @@ static void draw_gauge_cluster_bg(cairo_t *cr,
height * 0.5);
}
static void update_gauge_cluster(cairo_t *cr,
struct can_frame *frame,
double x,
double y,
double width,
double height) {
static double rpm = 0;
static double kph = 0;
static double temp = 0;
static double level = 0;
static void cluster_update(struct can_frame *frame) {
switch (frame->can_id) {
case 0x280: {
rpm = 0.25 * (double)(frame->data[2] | (frame->data[3] << 8));
state.rpm = 0.25 *
(double)(frame->data[2] | (frame->data[3] << 8));
break;
}
case 0x288: {
temp = (double)(frame->data[1] - 48 * 0.75);
state.temp = (double)(frame->data[1] - 48 * 0.75);
break;
}
case 0x320: {
level = (double)(frame->data[2]);
state.level = (double)(frame->data[2]);
break;
}
case 0x5a0: {
double rps = 0.001 * (double)((frame->data[1] >> 1)
| (frame->data[2] << 8));
kph = (2.032 * rps * 3600) / 1000.0;
state.rps = 0.001 * (double)((frame->data[1] >> 1)
| (frame->data[2] << 8));
break;
}
}
}
static void cluster_draw(cairo_t *cr,
double x,
double y,
double width,
double height) {
draw_tachometer_needle(cr, x + width * 0.2,
y + height * 0.5,
height * 0.4,
rpm);
state.rpm);
draw_speedometer_needle(cr,
width * 0.8,
height * 0.5,
height * 0.4,
kph);
(2.032 * state.rps * 3600) / 1000.0);
draw_thermometer_needle(cr,
width * 0.43,
height * 0.76,
height * 0.11,
temp);
state.temp);
draw_fuel_gauge_needle(cr,
width * 0.57,
@ -377,6 +382,12 @@ int main(int argc, char **argv) {
width = 1024,
height = 480;
struct timeval now,
last = {
.tv_sec = 0,
.tv_usec = 0
};
cairo_t *fg, *bg;
if ((can_if = hexagram_can_if_open("vcan0")) == NULL)
@ -399,7 +410,7 @@ int main(int argc, char **argv) {
/*
* Draw the background layer
*/
draw_gauge_cluster_bg(bg, width, height);
cluster_draw_bg(bg, width, height);
hexagram_window_show(window);
@ -414,6 +425,8 @@ int main(int argc, char **argv) {
while (1) {
int pending;
(void)gettimeofday(&now, NULL);
while ((pending = XPending(display)) != 0) {
XEvent e;
@ -450,11 +463,16 @@ int main(int argc, char **argv) {
case 0x288:
case 0x320:
case 0x5a0: {
hexagram_window_refresh_bg(window);
cluster_update(&frame);
update_gauge_cluster(fg, &frame, 0, 0, width, height);
if (now.tv_sec - last.tv_sec
|| now.tv_usec - last.tv_usec > 16666) {
hexagram_window_refresh_bg(window);
cluster_draw(fg, 0, 0, width, height);
hexagram_window_swap_buffer(window);
hexagram_window_swap_buffer(window);
(void)memcpy(&last, &now, sizeof(now));
}
}
}
}