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Diffstat (limited to 'Documentation/auxdisplay/cfag12864b-example.c')
| -rw-r--r-- | Documentation/auxdisplay/cfag12864b-example.c | 281 |
1 files changed, 0 insertions, 281 deletions
diff --git a/Documentation/auxdisplay/cfag12864b-example.c b/Documentation/auxdisplay/cfag12864b-example.c deleted file mode 100644 index e7823ffb1ca0..000000000000 --- a/Documentation/auxdisplay/cfag12864b-example.c +++ /dev/null @@ -1,281 +0,0 @@ -/* - * Filename: cfag12864b-example.c - * Version: 0.1.0 - * Description: cfag12864b LCD userspace example program - * License: GPLv2 - * - * Author: Copyright (C) Miguel Ojeda Sandonis - * Date: 2006-10-31 - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - * - */ - -/* - * ------------------------ - * start of cfag12864b code - * ------------------------ - */ - -#include <string.h> -#include <fcntl.h> -#include <unistd.h> -#include <sys/types.h> -#include <sys/stat.h> -#include <sys/mman.h> - -#define CFAG12864B_WIDTH (128) -#define CFAG12864B_HEIGHT (64) -#define CFAG12864B_SIZE (128 * 64 / 8) -#define CFAG12864B_BPB (8) -#define CFAG12864B_ADDRESS(x, y) ((y) * CFAG12864B_WIDTH / \ - CFAG12864B_BPB + (x) / CFAG12864B_BPB) -#define CFAG12864B_BIT(n) (((unsigned char) 1) << (n)) - -#undef CFAG12864B_DOCHECK -#ifdef CFAG12864B_DOCHECK - #define CFAG12864B_CHECK(x, y) ((x) < CFAG12864B_WIDTH && \ - (y) < CFAG12864B_HEIGHT) -#else - #define CFAG12864B_CHECK(x, y) (1) -#endif - -int cfag12864b_fd; -unsigned char * cfag12864b_mem; -unsigned char cfag12864b_buffer[CFAG12864B_SIZE]; - -/* - * init a cfag12864b framebuffer device - * - * No error: return = 0 - * Unable to open: return = -1 - * Unable to mmap: return = -2 - */ -static int cfag12864b_init(char *path) -{ - cfag12864b_fd = open(path, O_RDWR); - if (cfag12864b_fd == -1) - return -1; - - cfag12864b_mem = mmap(0, CFAG12864B_SIZE, PROT_READ | PROT_WRITE, - MAP_SHARED, cfag12864b_fd, 0); - if (cfag12864b_mem == MAP_FAILED) { - close(cfag12864b_fd); - return -2; - } - - return 0; -} - -/* - * exit a cfag12864b framebuffer device - */ -static void cfag12864b_exit(void) -{ - munmap(cfag12864b_mem, CFAG12864B_SIZE); - close(cfag12864b_fd); -} - -/* - * set (x, y) pixel - */ -static void cfag12864b_set(unsigned char x, unsigned char y) -{ - if (CFAG12864B_CHECK(x, y)) - cfag12864b_buffer[CFAG12864B_ADDRESS(x, y)] |= - CFAG12864B_BIT(x % CFAG12864B_BPB); -} - -/* - * unset (x, y) pixel - */ -static void cfag12864b_unset(unsigned char x, unsigned char y) -{ - if (CFAG12864B_CHECK(x, y)) - cfag12864b_buffer[CFAG12864B_ADDRESS(x, y)] &= - ~CFAG12864B_BIT(x % CFAG12864B_BPB); -} - -/* - * is set (x, y) pixel? - * - * Pixel off: return = 0 - * Pixel on: return = 1 - */ -static unsigned char cfag12864b_isset(unsigned char x, unsigned char y) -{ - if (CFAG12864B_CHECK(x, y)) - if (cfag12864b_buffer[CFAG12864B_ADDRESS(x, y)] & - CFAG12864B_BIT(x % CFAG12864B_BPB)) - return 1; - - return 0; -} - -/* - * not (x, y) pixel - */ -static void cfag12864b_not(unsigned char x, unsigned char y) -{ - if (cfag12864b_isset(x, y)) - cfag12864b_unset(x, y); - else - cfag12864b_set(x, y); -} - -/* - * fill (set all pixels) - */ -static void cfag12864b_fill(void) -{ - unsigned short i; - - for (i = 0; i < CFAG12864B_SIZE; i++) - cfag12864b_buffer[i] = 0xFF; -} - -/* - * clear (unset all pixels) - */ -static void cfag12864b_clear(void) -{ - unsigned short i; - - for (i = 0; i < CFAG12864B_SIZE; i++) - cfag12864b_buffer[i] = 0; -} - -/* - * format a [128*64] matrix - * - * Pixel off: src[i] = 0 - * Pixel on: src[i] > 0 - */ -static void cfag12864b_format(unsigned char * matrix) -{ - unsigned char i, j, n; - - for (i = 0; i < CFAG12864B_HEIGHT; i++) - for (j = 0; j < CFAG12864B_WIDTH / CFAG12864B_BPB; j++) { - cfag12864b_buffer[i * CFAG12864B_WIDTH / CFAG12864B_BPB + - j] = 0; - for (n = 0; n < CFAG12864B_BPB; n++) - if (matrix[i * CFAG12864B_WIDTH + - j * CFAG12864B_BPB + n]) - cfag12864b_buffer[i * CFAG12864B_WIDTH / - CFAG12864B_BPB + j] |= - CFAG12864B_BIT(n); - } -} - -/* - * blit buffer to lcd - */ -static void cfag12864b_blit(void) -{ - memcpy(cfag12864b_mem, cfag12864b_buffer, CFAG12864B_SIZE); -} - -/* - * ---------------------- - * end of cfag12864b code - * ---------------------- - */ - -#include <stdio.h> - -#define EXAMPLES 6 - -static void example(unsigned char n) -{ - unsigned short i, j; - unsigned char matrix[CFAG12864B_WIDTH * CFAG12864B_HEIGHT]; - - if (n > EXAMPLES) - return; - - printf("Example %i/%i - ", n, EXAMPLES); - - switch (n) { - case 1: - printf("Draw points setting bits"); - cfag12864b_clear(); - for (i = 0; i < CFAG12864B_WIDTH; i += 2) - for (j = 0; j < CFAG12864B_HEIGHT; j += 2) - cfag12864b_set(i, j); - break; - - case 2: - printf("Clear the LCD"); - cfag12864b_clear(); - break; - - case 3: - printf("Draw rows formatting a [128*64] matrix"); - memset(matrix, 0, CFAG12864B_WIDTH * CFAG12864B_HEIGHT); - for (i = 0; i < CFAG12864B_WIDTH; i++) - for (j = 0; j < CFAG12864B_HEIGHT; j += 2) - matrix[j * CFAG12864B_WIDTH + i] = 1; - cfag12864b_format(matrix); - break; - - case 4: - printf("Fill the lcd"); - cfag12864b_fill(); - break; - - case 5: - printf("Draw columns unsetting bits"); - for (i = 0; i < CFAG12864B_WIDTH; i += 2) - for (j = 0; j < CFAG12864B_HEIGHT; j++) - cfag12864b_unset(i, j); - break; - - case 6: - printf("Do negative not-ing all bits"); - for (i = 0; i < CFAG12864B_WIDTH; i++) - for (j = 0; j < CFAG12864B_HEIGHT; j ++) - cfag12864b_not(i, j); - break; - } - - puts(" - [Press Enter]"); -} - -int main(int argc, char *argv[]) -{ - unsigned char n; - - if (argc != 2) { - printf( - "Sintax: %s fbdev\n" - "Usually: /dev/fb0, /dev/fb1...\n", argv[0]); - return -1; - } - - if (cfag12864b_init(argv[1])) { - printf("Can't init %s fbdev\n", argv[1]); - return -2; - } - - for (n = 1; n <= EXAMPLES; n++) { - example(n); - cfag12864b_blit(); - while (getchar() != '\n'); - } - - cfag12864b_exit(); - - return 0; -} |