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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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68
examples/cluster.c
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@ -3,9 +3,19 @@
#include <string.h> #include <string.h>
#include <math.h> #include <math.h>
#include <sys/time.h>
#include <hexagram/can.h> #include <hexagram/can.h>
#include <hexagram/window.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, static void draw_needle(cairo_t *cr,
double x, double x,
double y, double y,
@ -266,7 +276,7 @@ static void draw_mfd(cairo_t *cr,
cairo_stroke(cr); cairo_stroke(cr);
} }
static void draw_gauge_cluster_bg(cairo_t *cr, static void cluster_draw_bg(cairo_t *cr,
double width, double width,
double height) { double height) {
/* /*
@ -302,62 +312,57 @@ static void draw_gauge_cluster_bg(cairo_t *cr,
height * 0.5); height * 0.5);
} }
static void update_gauge_cluster(cairo_t *cr, static void cluster_update(struct can_frame *frame) {
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;
switch (frame->can_id) { switch (frame->can_id) {
case 0x280: { 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; break;
} }
case 0x288: { case 0x288: {
temp = (double)(frame->data[1] - 48 * 0.75); state.temp = (double)(frame->data[1] - 48 * 0.75);
break; break;
} }
case 0x320: { case 0x320: {
level = (double)(frame->data[2]); state.level = (double)(frame->data[2]);
break; break;
} }
case 0x5a0: { case 0x5a0: {
double rps = 0.001 * (double)((frame->data[1] >> 1) state.rps = 0.001 * (double)((frame->data[1] >> 1)
| (frame->data[2] << 8)); | (frame->data[2] << 8));
kph = (2.032 * rps * 3600) / 1000.0;
break; break;
} }
} }
}
static void cluster_draw(cairo_t *cr,
double x,
double y,
double width,
double height) {
draw_tachometer_needle(cr, x + width * 0.2, draw_tachometer_needle(cr, x + width * 0.2,
y + height * 0.5, y + height * 0.5,
height * 0.4, height * 0.4,
rpm); state.rpm);
draw_speedometer_needle(cr, draw_speedometer_needle(cr,
width * 0.8, width * 0.8,
height * 0.5, height * 0.5,
height * 0.4, height * 0.4,
kph); (2.032 * state.rps * 3600) / 1000.0);
draw_thermometer_needle(cr, draw_thermometer_needle(cr,
width * 0.43, width * 0.43,
height * 0.76, height * 0.76,
height * 0.11, height * 0.11,
temp); state.temp);
draw_fuel_gauge_needle(cr, draw_fuel_gauge_needle(cr,
width * 0.57, width * 0.57,
@ -377,6 +382,12 @@ int main(int argc, char **argv) {
width = 1024, width = 1024,
height = 480; height = 480;
struct timeval now,
last = {
.tv_sec = 0,
.tv_usec = 0
};
cairo_t *fg, *bg; cairo_t *fg, *bg;
if ((can_if = hexagram_can_if_open("vcan0")) == NULL) if ((can_if = hexagram_can_if_open("vcan0")) == NULL)
@ -399,7 +410,7 @@ int main(int argc, char **argv) {
/* /*
* Draw the background layer * Draw the background layer
*/ */
draw_gauge_cluster_bg(bg, width, height); cluster_draw_bg(bg, width, height);
hexagram_window_show(window); hexagram_window_show(window);
@ -414,6 +425,8 @@ int main(int argc, char **argv) {
while (1) { while (1) {
int pending; int pending;
(void)gettimeofday(&now, NULL);
while ((pending = XPending(display)) != 0) { while ((pending = XPending(display)) != 0) {
XEvent e; XEvent e;
@ -450,11 +463,16 @@ int main(int argc, char **argv) {
case 0x288: case 0x288:
case 0x320: case 0x320:
case 0x5a0: { case 0x5a0: {
cluster_update(&frame);
if (now.tv_sec - last.tv_sec
|| now.tv_usec - last.tv_usec > 16666) {
hexagram_window_refresh_bg(window); hexagram_window_refresh_bg(window);
cluster_draw(fg, 0, 0, width, height);
update_gauge_cluster(fg, &frame, 0, 0, width, height);
hexagram_window_swap_buffer(window); hexagram_window_swap_buffer(window);
(void)memcpy(&last, &now, sizeof(now));
}
} }
} }
} }