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implemented graphics

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This commit is contained in:
Andy Killorin 2025-04-12 17:25:21 -04:00
parent 6004eaac27
commit 564d05b183
1 changed files with 73 additions and 0 deletions
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73
main.c
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@ -34,6 +34,8 @@
uint32_t gSystemClock = 120000000; // [Hz] system clock frequency
tContext sContext;
#define LOCAL_BUF_LEN 128
uint16_t adc_buffer_sample[LOCAL_BUF_LEN]; // copy of g adc buffer
uint8_t adc_buffer_processed[LOCAL_BUF_LEN]; // copy of g adc buffer
@ -109,6 +111,12 @@ int main(void)
start_signal();
start_sampler();
Crystalfontz128x128_Init(); // Initialize the LCD display driver
Crystalfontz128x128_SetOrientation(LCD_ORIENTATION_UP); // set screen orientation
GrContextInit(&sContext, &g_sCrystalfontz128x128); // Initialize the grlib graphics context
GrContextFontSet(&sContext, &g_sFontFixed6x8); // select font
/* Start BIOS */
BIOS_start();
@ -171,8 +179,73 @@ void process_waveform(UArg arg1, UArg arg2) {
void display_waveform(UArg arg1, UArg arg2)
{
char str[50]; // string buffer
tRectangle rectFullScreen = {0, 0, GrContextDpyWidthGet(&sContext)-1, GrContextDpyHeightGet(&sContext)-1};
while(1) {
Semaphore_pend(display_sem, BIOS_WAIT_FOREVER);
GrContextForegroundSet(&sContext, ClrBlack);
GrRectFill(&sContext, &rectFullScreen); // fill screen with black
GrContextForegroundSet(&sContext, ClrBlue);
// draw gridlines from the center out
uint8_t xy_pos;
for (xy_pos = HEIGHT/2; xy_pos < HEIGHT; xy_pos += PIXELS_PER_DIV) {
GrLineDrawV(&sContext, xy_pos, 0, 128); // right
GrLineDrawV(&sContext, HEIGHT - xy_pos, 0, 128); // left
GrLineDrawH(&sContext, 0, 128, xy_pos); // down
GrLineDrawH(&sContext, 0, 128, HEIGHT - xy_pos); // up
}
// info
GrContextForegroundSet(&sContext, ClrWheat);
GrStringDraw(&sContext, gVoltageScaleStr[voltage_scale], /*length*/ -1, /*x*/ 0, /*y*/ 0, /*opaque*/ false);
GrStringDraw(&sContext, gTimeScaleStr[time_scale], /*length*/ -1, /*x*/ 60, /*y*/ 0, /*opaque*/ false);
//snprintf(str, sizeof(str), "CPU Load %.1f%%", usage_percent);
//GrStringDraw(&sContext, str, /*length*/ -1, /*x*/ 0, /*y*/ HEIGHT - 10, /*opaque*/ false);
switch (trigger_mode) {
case 1:
GrStringDraw(&sContext, "^", /*length*/ -1, /*x*/ WIDTH - 10, /*y*/ 0, /*opaque*/ false);
break;
case 0:
GrStringDraw(&sContext, "v", /*length*/ -1, /*x*/ WIDTH - 10, /*y*/ 0, /*opaque*/ false);
break;
case 2:
GrStringDraw(&sContext, "-", /*length*/ -1, /*x*/ WIDTH - 10, /*y*/ 0, /*opaque*/ false);
break;
}
// display graph
GrContextForegroundSet(&sContext, ClrYellow);
int j;
for(j=0; j<LOCAL_BUF_LEN; j++) {
#define MIN(a,b) (((a)<(b))?(a):(b))
#define MAX(a,b) (((a)>(b))?(a):(b))
uint32_t upper,lower, current, last;
if (j==0) {
upper = adc_buffer_processed[j];
lower = upper;
last = upper;
} else {
current = adc_buffer_processed[j];
upper = MAX(current, last);
lower = MIN(current, last);
last = current;
}
GrLineDrawV(&sContext, j, lower, upper);
}
GrFlush(&sContext); // flush the frame buffer to the LCD
}
}