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LPCOpen Platform for NXP LPC Microcontrollers
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lcd.c
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1 /*
2  * @brief Simple LCD colorbar example with image and cursor
3  *
4  * @note
5  * Copyright(C) NXP Semiconductors, 2012
6  * All rights reserved.
7  *
8  * @par
9  * Software that is described herein is for illustrative purposes only
10  * which provides customers with programming information regarding the
11  * LPC products. This software is supplied "AS IS" without any warranties of
12  * any kind, and NXP Semiconductors and its licensor disclaim any and
13  * all warranties, express or implied, including all implied warranties of
14  * merchantability, fitness for a particular purpose and non-infringement of
15  * intellectual property rights. NXP Semiconductors assumes no responsibility
16  * or liability for the use of the software, conveys no license or rights under any
17  * patent, copyright, mask work right, or any other intellectual property rights in
18  * or to any products. NXP Semiconductors reserves the right to make changes
19  * in the software without notification. NXP Semiconductors also makes no
20  * representation or warranty that such application will be suitable for the
21  * specified use without further testing or modification.
22  *
23  * @par
24  * Permission to use, copy, modify, and distribute this software and its
25  * documentation is hereby granted, under NXP Semiconductors' and its
26  * licensor's relevant copyrights in the software, without fee, provided that it
27  * is used in conjunction with NXP Semiconductors microcontrollers. This
28  * copyright, permission, and disclaimer notice must appear in all copies of
29  * this code.
30  */
31 
32 #include "board.h"
33 #include "Cursor.h"
34 
53 /*****************************************************************************
54  * Private types/enumerations/variables
55  ****************************************************************************/
56 
57 #define LCD_WIDTH BOARD_LCD.PPL
58 #define LCD_HEIGHT BOARD_LCD.LPP
59 #define LOGO_WIDTH 110
60 #define LOGO_HEIGHT 42
61 
62 /* pointer to frame buffer */
63 static uint16_t *framebuffer = (uint16_t *) FRAMEBUFFER_ADDR;
64 static volatile uint32_t msec;
65 
66 /*****************************************************************************
67  * Public types/enumerations/variables
68  ****************************************************************************/
69 
70 /* Image */
71 extern const unsigned short image[];
72 
73 /*****************************************************************************
74  * Private functions
75  ****************************************************************************/
76 
77 /* Put a pixel at the x, y coordinate */
78 static void putpixel(uint32_t x, uint32_t y, uint16_t val) {
79  framebuffer[x + y * LCD_WIDTH] = val;
80 }
81 
82 /*****************************************************************************
83  * Public functions
84  ****************************************************************************/
85 
90 void SysTick_Handler(void)
91 {
92  if (msec) {
93  msec--;
94  }
95 }
96 
101 int main(void)
102 {
103  uint32_t i, j;
104  int cursor_x = 100, cursor_y = 150;
105  int16_t tmp_x = -1, tmp_y = -1;
106 
107  Board_Init();
108  Board_LCD_Init();
109 
110  Chip_GPIO_Init();
111 
112  SysTick_Config(SystemCoreClock / 1000);
113  msec = 5;
114  while (msec) {}
115 
116  /* Fill Colorbar only*/
117  for (i = 0; i < LCD_WIDTH * LCD_HEIGHT / 4; i++) {
118  framebuffer[i] = 0x1F;
119  }
120  for (i = LCD_WIDTH * LCD_HEIGHT / 4; i < LCD_WIDTH * LCD_HEIGHT * 2 / 4; i++) {
121  framebuffer[i] = 0x3F << 5;
122  }
123  for (i = LCD_WIDTH * LCD_HEIGHT * 2 / 4; i < LCD_WIDTH * LCD_HEIGHT * 3 / 4; i++) {
124  framebuffer[i] = 0x1F << 11;
125  }
126  for (i = LCD_WIDTH * LCD_HEIGHT * 3 / 4; i < LCD_WIDTH * LCD_HEIGHT; i++) {
127  framebuffer[i] = 0xFFFF;
128  }
129  /* Fill NXP logo */
130  for (j = 0; j < LOGO_HEIGHT; j++) {
131  for (i = 0; i < LOGO_WIDTH; i++) {
132  putpixel(i, j, image[(i + j * LOGO_WIDTH)]);
133  }
134  }
135 
140  msec = 100;
141  while (msec) {}
142 
145  Chip_LCD_Cursor_WriteImage(0, (void *) Cursor);
146  Chip_LCD_Cursor_SetPos(cursor_x, cursor_y);
148 
149  /* Turn on backlight */
151 
152  msec = 20;
153  while (msec) {}
154 
155  while (1) {
156  GetTouchPos((int16_t *) &tmp_x, (int16_t *) &tmp_y);
157  if ((tmp_x >= 0) && (tmp_y > 0)) {
158  cursor_x = tmp_x - CURSOR_H_SIZE / 2;
159  cursor_y = tmp_y - CURSOR_V_SIZE / 2;
160  }
161 
162  if ((LCD_WIDTH - CURSOR_H_SIZE / 2) < cursor_x) {
163  cursor_x = LCD_WIDTH - CURSOR_H_SIZE / 2;
164  }
165 
166  if (-(CURSOR_H_SIZE / 2) > cursor_x) {
167  cursor_x = -(CURSOR_H_SIZE / 2);
168  }
169 
170  if ((LCD_HEIGHT - CURSOR_V_SIZE / 2) < cursor_y) {
171  cursor_y = (LCD_HEIGHT - CURSOR_V_SIZE / 2);
172  }
173 
174  if (-(CURSOR_V_SIZE / 2) > cursor_y) {
175  cursor_y = -(CURSOR_V_SIZE / 2);
176  }
177  Chip_LCD_Cursor_SetPos(cursor_x, cursor_y);
178  }
179 }
180