378 lines
11 KiB
C
378 lines
11 KiB
C
/*
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* Copyright (c) 2015, Zolertia <http://www.zolertia.com>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* This file is part of the Contiki operating system.
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*
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*/
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/*---------------------------------------------------------------------------*/
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/**
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* \addtogroup zoul-lcd-backlight-lcd
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* @{
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*
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* \file
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* Grove LCD with RGB backlight driver
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* \author
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* Antonio Lignan <alinan@zolertia.com>
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*/
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/*---------------------------------------------------------------------------*/
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#include <stdio.h>
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#include "contiki.h"
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#include "dev/i2c.h"
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#include "dev/rgb-bl-lcd.h"
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#include "lib/sensors.h"
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/*---------------------------------------------------------------------------*/
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#define DEBUG 0
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#if DEBUG
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#define PRINTF(...) printf(__VA_ARGS__)
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#else
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#define PRINTF(...)
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#endif
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/*---------------------------------------------------------------------------*/
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static uint8_t enabled;
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/*---------------------------------------------------------------------------*/
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typedef struct {
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uint8_t display_func;
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uint8_t display_ctrl;
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uint8_t display_mode;
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uint8_t num_lines;
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uint8_t cur_line;
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} rgb_lcd_config_t;
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static rgb_lcd_config_t lcd;
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/*---------------------------------------------------------------------------*/
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static const unsigned char rgb_color[7][3] =
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{
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{ 0xFF, 0xFF, 0xFF }, /**< White */
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{ 0xFF, 0x00, 0x00 }, /**< Red */
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{ 0x00, 0xFF, 0x00 }, /**< Green */
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{ 0x00, 0x00, 0xFF }, /**< Blue */
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{ 0xFF, 0xFF, 0x00 }, /**< Yellow */
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{ 0x00, 0xFF, 0xFF }, /**< Purple */
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{ 0x00, 0x00, 0x00 }, /**< Black (off) */
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};
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/*---------------------------------------------------------------------------*/
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static int
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lcd_backlight_write_reg(uint8_t addr, uint8_t val)
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{
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uint8_t buf[2];
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buf[0] = addr;
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buf[1] = val;
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i2c_master_enable();
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if(i2c_burst_send(LCD_RGB_ADDR, buf, 2) == I2C_MASTER_ERR_NONE) {
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return LCD_RGB_SUCCESS;
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}
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return LCD_RGB_ERROR;
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}
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/*---------------------------------------------------------------------------*/
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int
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lcd_backlight_color(uint8_t color)
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{
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lcd_backlight_write_reg(LCD_RGB_LED_RED, rgb_color[color][0]);
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lcd_backlight_write_reg(LCD_RGB_LED_GREEN, rgb_color[color][1]);
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lcd_backlight_write_reg(LCD_RGB_LED_BLUE, rgb_color[color][2]);
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return LCD_RGB_SUCCESS;
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}
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/*---------------------------------------------------------------------------*/
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static int
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lcd_write_reg(uint8_t *buf, uint8_t num)
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{
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if((buf == NULL) || (num <= 0)) {
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PRINTF("LCD: invalid write values\n");
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return LCD_RGB_ERROR;
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}
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i2c_master_enable();
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if(i2c_burst_send(LCD_ADDR, buf, num) == I2C_MASTER_ERR_NONE) {
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return LCD_RGB_SUCCESS;
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}
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return LCD_RGB_ERROR;
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}
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/*---------------------------------------------------------------------------*/
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static int
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lcd_cmd(uint8_t value)
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{
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uint8_t buf[2];
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buf[0] = LCD_RGB_COMMAND_BYTE;
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buf[1] = value;
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if(lcd_write_reg(buf, 2) == LCD_RGB_SUCCESS) {
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return LCD_RGB_SUCCESS;
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}
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PRINTF("LCD: failed to send command 0x%02X\n", value);
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return LCD_RGB_ERROR;
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}
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/*---------------------------------------------------------------------------*/
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int
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lcd_clear_display(void)
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{
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if(lcd_cmd(LCD_RGB_CLEAR_DISPLAY) == LCD_RGB_SUCCESS) {
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clock_delay_usec(LCD_RGB_DELAY_2MS);
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return LCD_RGB_SUCCESS;
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}
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PRINTF("LCD: failed to clear LCD\n");
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return LCD_RGB_ERROR;
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}
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/*---------------------------------------------------------------------------*/
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int
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lcd_return_home(void)
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{
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if(lcd_cmd(LCD_RGB_RETURN_HOME) == LCD_RGB_SUCCESS) {
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clock_delay_usec(LCD_RGB_DELAY_2MS);
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return LCD_RGB_SUCCESS;
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}
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PRINTF("LCD: failed to return home\n");
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return LCD_RGB_ERROR;
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}
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/*---------------------------------------------------------------------------*/
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int
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lcd_set_cursor(uint8_t col, uint8_t row)
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{
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uint8_t buf[2];
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buf[0] = LCD_RGB_SETDDRAM_ADDR;
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buf[1] = col;
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buf[1] += (!row) ? LCD_RGB_START_1ST_ROW : LCD_RGB_START_2ND_ROW;
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if(lcd_write_reg(buf, 2) == LCD_RGB_SUCCESS) {
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return LCD_RGB_SUCCESS;
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}
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PRINTF("LCD: failed to set cursor\n");
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return LCD_RGB_ERROR;
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}
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/*---------------------------------------------------------------------------*/
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int
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lcd_display(uint8_t state)
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{
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lcd.display_ctrl &= ~LCD_RGB_DISPLAY_ON;
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if(state) {
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lcd.display_ctrl |= LCD_RGB_DISPLAY_ON;
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}
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if(lcd_cmd(LCD_RGB_DISPLAY_CONTROL + lcd.display_ctrl) == LCD_RGB_SUCCESS) {
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return LCD_RGB_SUCCESS;
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}
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PRINTF("LCD: failed to set display\n");
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return LCD_RGB_ERROR;
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}
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/*---------------------------------------------------------------------------*/
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int
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lcd_cursor(uint8_t state)
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{
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lcd.display_ctrl &= ~LCD_RGB_DISPLAY_CURSOR_ON;
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if(state) {
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lcd.display_ctrl |= LCD_RGB_DISPLAY_CURSOR_ON;
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}
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if(lcd_cmd(LCD_RGB_DISPLAY_CONTROL + lcd.display_ctrl) == LCD_RGB_SUCCESS) {
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return LCD_RGB_SUCCESS;
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}
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PRINTF("LCD: failed to set cursor\n");
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return LCD_RGB_ERROR;
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}
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/*---------------------------------------------------------------------------*/
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int
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lcd_blink(uint8_t state)
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{
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lcd.display_ctrl &= ~LCD_RGB_DISPLAY_BLINK_ON;
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if(state) {
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lcd.display_ctrl |= LCD_RGB_DISPLAY_BLINK_ON;
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}
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if(lcd_cmd(LCD_RGB_DISPLAY_CONTROL + lcd.display_ctrl) == LCD_RGB_SUCCESS) {
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return LCD_RGB_SUCCESS;
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}
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PRINTF("LCD: failed to set blink\n");
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return LCD_RGB_ERROR;
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}
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/*---------------------------------------------------------------------------*/
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int
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lcd_scroll_display(uint8_t direction, uint8_t num)
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{
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uint8_t i;
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/* FIXME: add check for num */
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for(i = 0; i < num; i++) {
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if(lcd_cmd(LCD_RGB_CURSOR_SHIFT + LCD_RGB_CURSOR_DISPLAY_MOVE +
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direction) != LCD_RGB_SUCCESS) {
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PRINTF("LCD: failed to set scroll\n");
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return LCD_RGB_ERROR;
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}
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}
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return LCD_RGB_SUCCESS;
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}
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/*---------------------------------------------------------------------------*/
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int
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lcd_text_direction(uint8_t direction)
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{
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lcd.display_mode &= ~LCD_RGB_ENTRY_MODE_LEFT;
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if(direction) {
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lcd.display_mode |= LCD_RGB_ENTRY_MODE_LEFT;
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}
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if(lcd_cmd(LCD_RGB_ENTRY_MODE_SET + lcd.display_mode) == LCD_RGB_SUCCESS) {
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return LCD_RGB_SUCCESS;
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}
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PRINTF("LCD: failed to set text direction\n");
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return LCD_RGB_ERROR;
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}
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/*---------------------------------------------------------------------------*/
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int
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lcd_autoscroll(uint8_t state)
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{
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lcd.display_mode &= ~LCD_RGB_ENTRY_SHIFT_INCREMENT;
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if(state) {
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lcd.display_mode |= LCD_RGB_ENTRY_SHIFT_INCREMENT;
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}
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if(lcd_cmd(LCD_RGB_ENTRY_MODE_SET + lcd.display_mode) == LCD_RGB_SUCCESS) {
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return LCD_RGB_SUCCESS;
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}
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PRINTF("LCD: failed to set autoscroll\n");
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return LCD_RGB_ERROR;
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}
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/*---------------------------------------------------------------------------*/
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static int
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lcd_write_byte(int c)
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{
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uint8_t buf[2];
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buf[0] = LCD_RGB_SETCGRAM_ADDR;
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buf[1] = c;
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if(lcd_write_reg(buf, 2) == LCD_RGB_SUCCESS) {
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return LCD_RGB_SUCCESS;
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}
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return LCD_RGB_ERROR;
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}
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/*---------------------------------------------------------------------------*/
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uint8_t
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lcd_write(const char *s)
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{
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uint8_t i = 0;
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while(s && *s != 0) {
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lcd_write_byte(*s++);
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i++;
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}
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PRINTF("LCD: wrote %u bytes\n", i);
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return i;
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}
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/*---------------------------------------------------------------------------*/
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static int
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configure(int type, int value)
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{
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if(type != LCD_RGB_ACTIVE) {
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PRINTF("LCD: option not supported\n");
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return LCD_RGB_ERROR;
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}
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switch(type) {
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/* Default initialization value is 16 columns and 2 rows */
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case LCD_RGB_ACTIVE:
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if(value) {
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i2c_init(I2C_SDA_PORT, I2C_SDA_PIN, I2C_SCL_PORT, I2C_SCL_PIN,
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I2C_SCL_NORMAL_BUS_SPEED);
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lcd.display_func = LCD_RGB_FUNCTION_SET_2_LINE +
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LCD_RGB_FUNCTION_SET_5x8_DOTS;
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/* wait at least 50ms for the LCD to initialize */
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clock_delay_usec(LCD_RGB_DELAY_50MS);
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/* Send function set command sequence */
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if(lcd_cmd(LCD_RGB_FUNCTION_SET + lcd.display_func) == LCD_RGB_ERROR) {
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return LCD_RGB_ERROR;
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}
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clock_delay_usec(LCD_RGB_DELAY_4_5MS);
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/* Datasheet instructs to repeat a second time... */
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if(lcd_cmd(LCD_RGB_FUNCTION_SET + lcd.display_func) == LCD_RGB_ERROR) {
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return LCD_RGB_ERROR;
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}
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clock_delay_usec(LCD_RGB_DELAY_150US);
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/* and a third... */
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if(lcd_cmd(LCD_RGB_FUNCTION_SET + lcd.display_func) == LCD_RGB_ERROR) {
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return LCD_RGB_ERROR;
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}
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/* Now we can configure everything */
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if(lcd_cmd(LCD_RGB_FUNCTION_SET + lcd.display_func) == LCD_RGB_ERROR) {
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return LCD_RGB_ERROR;
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}
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/* Turn on the display */
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lcd.display_ctrl = LCD_RGB_DISPLAY_ON + LCD_RGB_DISPLAY_CURSOR_OFF +
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LCD_RGB_DISPLAY_BLINK_OFF;
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if(lcd_cmd(LCD_RGB_DISPLAY_CONTROL + lcd.display_ctrl) == LCD_RGB_ERROR) {
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return LCD_RGB_ERROR;
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}
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/* Clear the display */
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if(lcd_clear_display() == LCD_RGB_ERROR) {
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return LCD_RGB_ERROR;
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}
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/* Initialize text direction (the LCD supports japanese, cool! */
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lcd.display_mode = LCD_RGB_ENTRY_MODE_LEFT + LCD_RGB_ENTRY_SHIFT_DECREMENT;
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/* configure the entry mode */
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if(lcd_cmd(LCD_RGB_ENTRY_MODE_SET + lcd.display_mode) == LCD_RGB_ERROR) {
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return LCD_RGB_ERROR;
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}
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/* Backlight initialization */
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lcd_backlight_write_reg(LCD_RGB_LED_MODE_1, LCD_RGB_LED_MODE_DEFAULT);
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lcd_backlight_write_reg(LCD_RGB_LED_MODE_2, LCD_RGB_LED_MODE_DEFAULT);
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lcd_backlight_write_reg(LCD_RGB_LED_OUT, LCD_RGB_LED_OUT_PWM_CTRL);
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/* Set the backlight color */
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lcd_backlight_color(LCD_RGB_RED);
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PRINTF("LCD: initialized\n");
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enabled = 1;
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return LCD_RGB_SUCCESS;
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} else {
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lcd_display(LCD_RGB_DISPLAY_OFF);
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lcd_backlight_color(LCD_RGB_BLACK);
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enabled = 0;
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}
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}
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return LCD_RGB_ERROR;
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}
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/*---------------------------------------------------------------------------*/
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SENSORS_SENSOR(rgb_bl_lcd, RGB_BACKLIGHT_LCD, NULL, configure, NULL);
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/*---------------------------------------------------------------------------*/
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/** @} */
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