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zephyr/drivers/grove/lcd_rgb.c
Kumar Gala cc334c7273 Convert remaining code to using newly introduced integer sized types 
Convert code to use u{8,16,32,64}_t and s{8,16,32,64}_t instead of C99
integer types.  This handles the remaining includes and kernel, plus
touching up various points that we skipped because of include
dependancies.  We also convert the PRI printf formatters in the arch
code over to normal formatters.

Jira: ZEP-2051

Change-Id: Iecbb12601a3ee4ea936fd7ddea37788a645b08b0
Signed-off-by: Kumar Gala <kumar.gala@linaro.org>
2017-04-21 11:38:23 -05:00

349 lines
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C
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/*
* Copyright (c) 2015 Intel Corporation
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <errno.h>
#include <kernel.h>
#include <init.h>
#include <stdbool.h>
#include <i2c.h>
#include <display/grove_lcd.h>
#include <misc/util.h>
#define SYS_LOG_DOMAIN "Grove LCD"
#define SYS_LOG_LEVEL CONFIG_SYS_LOG_GROVE_LEVEL
#include <logging/sys_log.h>
#define SLEEP_IN_US(_x_) ((_x_) * 1000)
#define GROVE_LCD_DISPLAY_ADDR (0x3E)
#define GROVE_RGB_BACKLIGHT_ADDR (0x62)
struct command {
u8_t control;
u8_t data;
};
struct glcd_data {
struct device *i2c;
u8_t input_set;
u8_t display_switch;
u8_t function;
};
struct glcd_driver {
u16_t lcd_addr;
u16_t rgb_addr;
};
#define ON 0x1
#define OFF 0x0
/********************************************
* LCD FUNCTIONS
*******************************************/
/* GLCD_CMD_SCREEN_CLEAR has no options */
/* GLCD_CMD_CURSOR_RETURN has no options */
/* Defines for the GLCD_CMD_CURSOR_SHIFT */
#define GLCD_CS_DISPLAY_SHIFT (1 << 3)
#define GLCD_CS_RIGHT_SHIFT (1 << 2)
/* LCD Display Commands */
#define GLCD_CMD_SCREEN_CLEAR (1 << 0)
#define GLCD_CMD_CURSOR_RETURN (1 << 1)
#define GLCD_CMD_INPUT_SET (1 << 2)
#define GLCD_CMD_DISPLAY_SWITCH (1 << 3)
#define GLCD_CMD_CURSOR_SHIFT (1 << 4)
#define GLCD_CMD_FUNCTION_SET (1 << 5)
#define GLCD_CMD_SET_CGRAM_ADDR (1 << 6)
#define GLCD_CMD_SET_DDRAM_ADDR (1 << 7)
/********************************************
* RGB FUNCTIONS
*******************************************/
#define REGISTER_POWER 0x08
#define REGISTER_R 0x04
#define REGISTER_G 0x03
#define REGISTER_B 0x02
static u8_t color_define[][3] = {
{ 255, 255, 255 }, /* white */
{ 255, 0, 0 }, /* red */
{ 0, 255, 0 }, /* green */
{ 0, 0, 255 }, /* blue */
};
/********************************************
* PRIVATE FUNCTIONS
*******************************************/
static void _rgb_reg_set(struct device * const i2c, u8_t addr, u8_t dta)
{
u8_t data[2] = { addr, dta };
i2c_write(i2c, data, sizeof(data), GROVE_RGB_BACKLIGHT_ADDR);
}
static inline void _sleep(u32_t sleep_in_ms)
{
k_busy_wait(SLEEP_IN_US(sleep_in_ms));
}
/********************************************
* PUBLIC FUNCTIONS
*******************************************/
void glcd_print(struct device *port, char *data, u32_t size)
{
const struct glcd_driver * const rom = (struct glcd_driver *)
port->config->config_info;
struct glcd_data *dev = port->driver_data;
u8_t buf[] = { GLCD_CMD_SET_CGRAM_ADDR, 0 };
int i;
for (i = 0; i < size; i++) {
buf[1] = data[i];
i2c_write(dev->i2c, buf, sizeof(buf), rom->lcd_addr);
}
}
void glcd_cursor_pos_set(struct device *port, u8_t col, u8_t row)
{
const struct glcd_driver * const rom = (struct glcd_driver *)
port->config->config_info;
struct glcd_data *dev = port->driver_data;
unsigned char data[2];
if (row == 0) {
col |= 0x80;
} else {
col |= 0xC0;
}
data[0] = GLCD_CMD_SET_DDRAM_ADDR;
data[1] = col;
i2c_write(dev->i2c, data, 2, rom->lcd_addr);
}
void glcd_clear(struct device *port)
{
const struct glcd_driver * const rom = (struct glcd_driver *)
port->config->config_info;
struct glcd_data *dev = port->driver_data;
u8_t clear[] = { 0, GLCD_CMD_SCREEN_CLEAR };
i2c_write(dev->i2c, clear, sizeof(clear), rom->lcd_addr);
SYS_LOG_DBG("clear, delay 20 ms");
_sleep(20);
}
void glcd_display_state_set(struct device *port, u8_t opt)
{
const struct glcd_driver * const rom = (struct glcd_driver *)
port->config->config_info;
struct glcd_data *dev = port->driver_data;
u8_t data[] = { 0, 0 };
dev->display_switch = opt;
data[1] = (opt | GLCD_CMD_DISPLAY_SWITCH);
i2c_write(dev->i2c, data, sizeof(data), rom->lcd_addr);
SYS_LOG_DBG("set display_state options, delay 5 ms");
_sleep(5);
}
u8_t glcd_display_state_get(struct device *port)
{
struct glcd_data *dev = port->driver_data;
return dev->display_switch;
}
void glcd_input_state_set(struct device *port, u8_t opt)
{
const struct glcd_driver * const rom = port->config->config_info;
struct glcd_data *dev = port->driver_data;
u8_t data[] = { 0, 0 };
dev->input_set = opt;
data[1] = (opt | GLCD_CMD_INPUT_SET);
i2c_write(dev->i2c, &dev->input_set, sizeof(dev->input_set),
rom->lcd_addr);
SYS_LOG_DBG("set the input_set, no delay");
}
u8_t glcd_input_state_get(struct device *port)
{
struct glcd_data *dev = port->driver_data;
return dev->input_set;
}
void glcd_color_select(struct device *port, u8_t color)
{
if (color > 3) {
SYS_LOG_WRN("selected color is too high a value");
return;
}
glcd_color_set(port, color_define[color][0],
color_define[color][1],
color_define[color][2]);
}
void glcd_color_set(struct device *port, u8_t r, u8_t g, u8_t b)
{
struct glcd_data * const dev = port->driver_data;
_rgb_reg_set(dev->i2c, REGISTER_R, r);
_rgb_reg_set(dev->i2c, REGISTER_G, g);
_rgb_reg_set(dev->i2c, REGISTER_B, b);
}
void glcd_function_set(struct device *port, u8_t opt)
{
const struct glcd_driver * const rom = port->config->config_info;
struct glcd_data *dev = port->driver_data;
u8_t data[] = { 0, 0 };
dev->function = opt;
data[1] = (opt | GLCD_CMD_FUNCTION_SET);
i2c_write(dev->i2c, data, sizeof(data), rom->lcd_addr);
SYS_LOG_DBG("set function options, delay 5 ms");
_sleep(5);
}
u8_t glcd_function_get(struct device *port)
{
struct glcd_data *dev = port->driver_data;
return dev->function;
}
int glcd_initialize(struct device *port)
{
struct glcd_data *dev = port->driver_data;
u8_t cmd;
SYS_LOG_DBG("initialize called");
dev->input_set = 0;
dev->display_switch = 0;
dev->function = 0;
/*
* First set up the device driver...
* we need a pointer to the I2C device we are bound to
*/
dev->i2c = device_get_binding(
CONFIG_GROVE_LCD_RGB_I2C_MASTER_DEV_NAME);
if (!dev->i2c) {
return -EPERM;
}
/* Since device_get_binding() will not return any
* reference to a driver instance if port->driver_api
* is NULL and grove_lcd does not have any API struct,
* just populate it with some magic number
* so grove_lcd can be referenced.
*
* Since dev is probably still in registers.
* use that to minimize code addition.
*/
port->driver_api = (void *)dev;
/*
* Initialization sequence from the data sheet:
* 1 - Power on
* - Wait for more than 30 ms AFTER VDD rises to 4.5v
* 2 - Send FUNCTION set
* - Wait for 39 us
* 3 - Send DISPLAY Control
* - wait for 39 us
* 4 - send DISPLAY Clear
* - wait for 1.5 ms
* 5 - send ENTRY Mode
* 6 - Initialization is done
*/
/*
* We're here! Let's just make sure we've had enough time for the
* VDD to power on, so pause a little here, 30 ms min, so we go 50
*/
SYS_LOG_DBG("delay 50 ms while the VDD powers on");
_sleep(50);
/* Configure everything for the display function first */
cmd = GLCD_CMD_FUNCTION_SET | GLCD_FS_ROWS_2;
glcd_function_set(port, cmd);
/* turn the display on - by default no cursor and no blinking */
cmd = GLCD_DS_DISPLAY_ON | GLCD_DS_CURSOR_OFF | GLCD_DS_BLINK_OFF;
glcd_display_state_set(port, cmd);
/* Clear the screen */
glcd_clear(port);
/* Initialize to the default text direction for romance languages */
cmd = GLCD_IS_ENTRY_LEFT | GLCD_IS_SHIFT_DECREMENT;
glcd_input_state_set(port, cmd);
/* Now power on the background RGB control */
SYS_LOG_INF("configuring the RGB background");
_rgb_reg_set(dev->i2c, 0x00, 0x00);
_rgb_reg_set(dev->i2c, 0x01, 0x05);
_rgb_reg_set(dev->i2c, 0x08, 0xAA);
/* Now set the background color to white */
SYS_LOG_DBG("background set to white");
_rgb_reg_set(dev->i2c, REGISTER_R, color_define[GROVE_RGB_WHITE][0]);
_rgb_reg_set(dev->i2c, REGISTER_G, color_define[GROVE_RGB_WHITE][1]);
_rgb_reg_set(dev->i2c, REGISTER_B, color_define[GROVE_RGB_WHITE][2]);
return 0;
}
static const struct glcd_driver grove_lcd_config = {
.lcd_addr = GROVE_LCD_DISPLAY_ADDR,
.rgb_addr = GROVE_RGB_BACKLIGHT_ADDR,
};
static struct glcd_data grove_lcd_driver = {
.i2c = NULL,
.input_set = 0,
.display_switch = 0,
.function = 0,
};
DEVICE_INIT(grove_lcd, GROVE_LCD_NAME, glcd_initialize,
&grove_lcd_driver, &grove_lcd_config,
POST_KERNEL, CONFIG_APPLICATION_INIT_PRIORITY);
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