68 lines
2.1 KiB
C
68 lines
2.1 KiB
C
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#include <stdio.h>
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#include <graphics.h>
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#include <touchscreen.h>
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#include <pointer.h>
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#include "generic_devices.h"
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#include "devices.h"
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#define WIDTH 320
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#define HEIGHT 240
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// Function prototypes
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static void draw_mark(int x, int y, int width, int height, void *vp);
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char *cal1 = "Touch screen at marker";
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char *cal2 = "Calibration done";
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// Pointers for LCD, Touch panel, and graphics drivers
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graphics_t * display;
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canvas_t * canvas;
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touchscreen_t * tft_touch;
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touchscreen_data_t * position;
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touchscreen_callback_t callback;
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pointer_t * ptr;
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pointer_state_t * pointer_state;
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int dx, dy;
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void main (void)
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{
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// Open instances of drivers for LCD, Touch and Graphics
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tft_touch = touchscreen_open(TOUCHSCREEN_1);
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ptr = pointer_open(POINTER_1);
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display = graphics_open(GRAPHICS_1);
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canvas = graphics_get_visible_canvas(display);
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dx = dy = 0;
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// Tell Touch driver which function to call for display during calibration
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touchscreen_set_callback(tft_touch, draw_mark, canvas);
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while(!touchscreen_calibrate(tft_touch, WIDTH, HEIGHT));
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graphics_fill_canvas(canvas, 0x080008);
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while(1)
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{
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if (pointer_update(ptr, pointer_state))
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{
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// Send point to Terminal in Devices View.
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printf( "Touched screen at point (%d,%d)\n",
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pointer_state->x,
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pointer_state->y );
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graphics_draw_line(canvas, dx, dy, pointer_state->x,
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pointer_state->y, 0xFF0000);
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dx = pointer_state->x;
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dy = pointer_state->y;
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graphics_set_visible_canvas(display, canvas);
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}
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}
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}
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// Calibration call-back function - used to display a cross-hair at
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// Calibration points on TFT panel.
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static void draw_mark(int x, int y, int width, int height, void *vp)
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{
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graphics_draw_circle(canvas, x, y, 10, 0xff00ff);
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graphics_draw_line(canvas, x - 15, y, x + 15, y, 0x00ffff);
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graphics_draw_line(canvas, x, y - 15, x, y + 15, 0x00ffff);
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graphics_draw_string(canvas, 50, 50, cal1, NULL, 0xffffff, 0);
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graphics_set_visible_canvas(display, canvas);
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}
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