samples: move auxdisplay example code from Documentation
Move auxdisplay examples to samples and remove it from Documentation Makefile. Create a new Makefile to build auxdisplay. It can be built from top level directory or from auxdisplay directory: Run make -C samples/auxdisplay or cd samples/auxdisplay; make Acked-by: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
This commit is contained in:
Shuah Khan
parent
071bf69a02
commit
8fc07ebe63
6 changed files with 11 additions and 9 deletions
1
samples/auxdisplay/.gitignore
vendored
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1
samples/auxdisplay/.gitignore
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@ -0,0 +1 @@
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cfag12864b-example
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9
samples/auxdisplay/Makefile
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9
samples/auxdisplay/Makefile
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@ -0,0 +1,9 @@
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CC := $(CROSS_COMPILE)gcc
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CFLAGS := -I../../usr/include
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PROGS := cfag12864b-example
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all: $(PROGS)
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clean:
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rm -fr $(PROGS)
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281
samples/auxdisplay/cfag12864b-example.c
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281
samples/auxdisplay/cfag12864b-example.c
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/*
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* Filename: cfag12864b-example.c
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* Version: 0.1.0
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* Description: cfag12864b LCD userspace example program
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* License: GPLv2
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*
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* Author: Copyright (C) Miguel Ojeda Sandonis
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* Date: 2006-10-31
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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/*
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* ------------------------
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* start of cfag12864b code
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* ------------------------
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*/
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#include <string.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/mman.h>
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#define CFAG12864B_WIDTH (128)
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#define CFAG12864B_HEIGHT (64)
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#define CFAG12864B_SIZE (128 * 64 / 8)
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#define CFAG12864B_BPB (8)
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#define CFAG12864B_ADDRESS(x, y) ((y) * CFAG12864B_WIDTH / \
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CFAG12864B_BPB + (x) / CFAG12864B_BPB)
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#define CFAG12864B_BIT(n) (((unsigned char) 1) << (n))
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#undef CFAG12864B_DOCHECK
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#ifdef CFAG12864B_DOCHECK
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#define CFAG12864B_CHECK(x, y) ((x) < CFAG12864B_WIDTH && \
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(y) < CFAG12864B_HEIGHT)
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#else
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#define CFAG12864B_CHECK(x, y) (1)
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#endif
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int cfag12864b_fd;
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unsigned char * cfag12864b_mem;
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unsigned char cfag12864b_buffer[CFAG12864B_SIZE];
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/*
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* init a cfag12864b framebuffer device
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*
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* No error: return = 0
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* Unable to open: return = -1
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* Unable to mmap: return = -2
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*/
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static int cfag12864b_init(char *path)
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{
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cfag12864b_fd = open(path, O_RDWR);
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if (cfag12864b_fd == -1)
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return -1;
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cfag12864b_mem = mmap(0, CFAG12864B_SIZE, PROT_READ | PROT_WRITE,
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MAP_SHARED, cfag12864b_fd, 0);
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if (cfag12864b_mem == MAP_FAILED) {
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close(cfag12864b_fd);
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return -2;
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}
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return 0;
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}
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/*
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* exit a cfag12864b framebuffer device
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*/
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static void cfag12864b_exit(void)
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{
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munmap(cfag12864b_mem, CFAG12864B_SIZE);
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close(cfag12864b_fd);
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}
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/*
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* set (x, y) pixel
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*/
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static void cfag12864b_set(unsigned char x, unsigned char y)
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{
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if (CFAG12864B_CHECK(x, y))
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cfag12864b_buffer[CFAG12864B_ADDRESS(x, y)] |=
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CFAG12864B_BIT(x % CFAG12864B_BPB);
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}
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/*
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* unset (x, y) pixel
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*/
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static void cfag12864b_unset(unsigned char x, unsigned char y)
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{
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if (CFAG12864B_CHECK(x, y))
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cfag12864b_buffer[CFAG12864B_ADDRESS(x, y)] &=
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~CFAG12864B_BIT(x % CFAG12864B_BPB);
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}
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/*
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* is set (x, y) pixel?
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*
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* Pixel off: return = 0
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* Pixel on: return = 1
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*/
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static unsigned char cfag12864b_isset(unsigned char x, unsigned char y)
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{
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if (CFAG12864B_CHECK(x, y))
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if (cfag12864b_buffer[CFAG12864B_ADDRESS(x, y)] &
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CFAG12864B_BIT(x % CFAG12864B_BPB))
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return 1;
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return 0;
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}
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/*
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* not (x, y) pixel
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*/
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static void cfag12864b_not(unsigned char x, unsigned char y)
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{
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if (cfag12864b_isset(x, y))
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cfag12864b_unset(x, y);
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else
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cfag12864b_set(x, y);
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}
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/*
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* fill (set all pixels)
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*/
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static void cfag12864b_fill(void)
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{
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unsigned short i;
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for (i = 0; i < CFAG12864B_SIZE; i++)
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cfag12864b_buffer[i] = 0xFF;
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}
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/*
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* clear (unset all pixels)
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*/
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static void cfag12864b_clear(void)
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{
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unsigned short i;
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for (i = 0; i < CFAG12864B_SIZE; i++)
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cfag12864b_buffer[i] = 0;
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}
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/*
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* format a [128*64] matrix
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*
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* Pixel off: src[i] = 0
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* Pixel on: src[i] > 0
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*/
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static void cfag12864b_format(unsigned char * matrix)
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{
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unsigned char i, j, n;
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for (i = 0; i < CFAG12864B_HEIGHT; i++)
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for (j = 0; j < CFAG12864B_WIDTH / CFAG12864B_BPB; j++) {
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cfag12864b_buffer[i * CFAG12864B_WIDTH / CFAG12864B_BPB +
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j] = 0;
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for (n = 0; n < CFAG12864B_BPB; n++)
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if (matrix[i * CFAG12864B_WIDTH +
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j * CFAG12864B_BPB + n])
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cfag12864b_buffer[i * CFAG12864B_WIDTH /
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CFAG12864B_BPB + j] |=
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CFAG12864B_BIT(n);
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}
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}
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/*
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* blit buffer to lcd
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*/
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static void cfag12864b_blit(void)
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{
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memcpy(cfag12864b_mem, cfag12864b_buffer, CFAG12864B_SIZE);
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}
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/*
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* ----------------------
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* end of cfag12864b code
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* ----------------------
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*/
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#include <stdio.h>
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#define EXAMPLES 6
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static void example(unsigned char n)
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{
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unsigned short i, j;
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unsigned char matrix[CFAG12864B_WIDTH * CFAG12864B_HEIGHT];
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if (n > EXAMPLES)
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return;
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printf("Example %i/%i - ", n, EXAMPLES);
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switch (n) {
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case 1:
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printf("Draw points setting bits");
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cfag12864b_clear();
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for (i = 0; i < CFAG12864B_WIDTH; i += 2)
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for (j = 0; j < CFAG12864B_HEIGHT; j += 2)
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cfag12864b_set(i, j);
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break;
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case 2:
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printf("Clear the LCD");
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cfag12864b_clear();
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break;
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case 3:
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printf("Draw rows formatting a [128*64] matrix");
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memset(matrix, 0, CFAG12864B_WIDTH * CFAG12864B_HEIGHT);
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for (i = 0; i < CFAG12864B_WIDTH; i++)
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for (j = 0; j < CFAG12864B_HEIGHT; j += 2)
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matrix[j * CFAG12864B_WIDTH + i] = 1;
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cfag12864b_format(matrix);
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break;
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case 4:
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printf("Fill the lcd");
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cfag12864b_fill();
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break;
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case 5:
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printf("Draw columns unsetting bits");
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for (i = 0; i < CFAG12864B_WIDTH; i += 2)
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for (j = 0; j < CFAG12864B_HEIGHT; j++)
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cfag12864b_unset(i, j);
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break;
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case 6:
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printf("Do negative not-ing all bits");
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for (i = 0; i < CFAG12864B_WIDTH; i++)
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for (j = 0; j < CFAG12864B_HEIGHT; j ++)
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cfag12864b_not(i, j);
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break;
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}
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puts(" - [Press Enter]");
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}
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int main(int argc, char *argv[])
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{
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unsigned char n;
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if (argc != 2) {
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printf(
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"Sintax: %s fbdev\n"
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"Usually: /dev/fb0, /dev/fb1...\n", argv[0]);
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return -1;
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}
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if (cfag12864b_init(argv[1])) {
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printf("Can't init %s fbdev\n", argv[1]);
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return -2;
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}
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for (n = 1; n <= EXAMPLES; n++) {
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example(n);
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cfag12864b_blit();
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while (getchar() != '\n');
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}
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cfag12864b_exit();
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return 0;
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}
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