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