lcd_init.c File Reference

source file that has LCD display drivers - ST7291 More...

#include <stdio.h>
#include <stdlib.h>
#include <sys/ioctl.h>
#include <linux/gpio.h>
#include <fcntl.h>
#include <linux/spi/spidev.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <pthread.h>
#include <sys/eventfd.h>
#include <sys/epoll.h>
#include <stdint.h>
#include <time.h>
#include <getopt.h>
#include <sys/time.h>
#include <linux/types.h>

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Data Structures
struct	lv_color_t

Macros
#define	ST7291_SW_RESET   0x01
#define	ST7291_SLPOUT   0x11
#define	ST7291_FRMCTR1   0xB1
#define	ST7291_FRMCTR2   0xB2
#define	ST7291_FRMCTR3   0xB3
#define	ST7291_INVCTR   0xB4
#define	ST7291_PWCTR1   0xC0
#define	ST7291_PWCTR2   0xC1
#define	ST7291_PWCTR3   0xC2
#define	ST7291_PWCTR4   0xC3
#define	ST7291_PWCTR5   0xC4
#define	ST7291_VMCTR1   0xC5
#define	ST7291_COLMOD   0x3A
#define	ST7291_MADCTL   0x36 /* Memory Data Access Control */
#define	ST7291_CASET   0x2A
#define	ST7291_RASET   0x2B
#define	ST7291_GMSET   0xF2 /* Gammas Adjustment. */
#define	ST7291_GMCTRP1   0xE0
#define	ST7291_GMCTRN1   0xE1
#define	ST7291_DISPOFF   0x28
#define	ST7291_DISPON   0x29
#define	ST7291_NORON   0x13
#define	ST7291_RAMWR   0x2C
#define	LCD_RED   0xF800
#define	LCD_GREEN   0x07E0
#define	LCD_AMBER   0x0BFC
#define	LCD_BLUE   0x001F
#define	LCD_WHITE   0xFFFF
#define	LCD_BLACK   0x0000
#define	LCD_SPICS_GPIO   379
#define	LCD_RST_GPIO   380
#define	LCD_DATACMD_GPIO   383
#define	LCD_IO_CONTROL_PIN   467
#define	ST7735_SCREEN_WIDTH   160
#define	ST7735_SCREEN_HEIGHT   132
#define	ST7735_SCREEN_HEIGHT   132
#define	MAX_BUFFER_SIZE   ((ST7735_SCREEN_WIDTH * ST7735_SCREEN_HEIGHT * 3) + 16)
#define	MAX_CHUCK_SIZE   1024
#define	DRAW_BUFFER_NUM_LINESS   10
#define	MY_DISP_HOR_RESS   132
#define	MY_DISP_VER_RESS   132

Functions
int	GPIO_pin_SetValue (int GPIONUM, int Value)
	Gpio set value high or low.
int	LCD_SPI_DATAWRITE (uint8_t data)
int	LCD_SPI_CMDWRITE (uint8_t cmd)
int	LCD_SPI_BUFFDATAWRITE (uint8_t *data, uint16_t datalen)
int	LCD_SPI_BUFFWRITE (uint8_t *data, uint16_t datalen)
void	lcd_init (void)
	Function to perform LCD functionality.
void	LCD_RST (void)
	LCD reset.
uint8_t	ST7291_setScreenColor (uint16_t screenBasecolor, uint32_t pixcelNum)
	function to fill the screen color
uint8_t	ST7291_fillScreenColor (uint16_t screenBasecolor)
	Function to fill the screen colour pixel by pixel.
uint8_t	ST7291_setScreenWindow (uint16_t x1, uint16_t y1, uint16_t x2, uint16_t y2)
	function to setting the window color
int	ST7291_init (void)
	Initialization of the LCD ST7291_chip.
int	LCD_SET_DATACMD (char mode)
	Sets the data/cmd line to receive the data nased on the modes.
void	lcd_refresh (lv_color_t *framebuf)
	Refreshes the screen.
void	lcd_send_data (uint16_t x_start, uint16_t y_start, uint16_t x_end, uint16_t y_end, uint8_t *p)
	Send data pixelwise.
void	lcd_refreshbuf (lv_color_t *framebuf)
	Refreshes the screen.

Variables
int32_t	colours [6] = { LCD_RED, LCD_GREEN, LCD_AMBER,LCD_BLUE, LCD_WHITE,LCD_BLACK}
char	errbuf [100] ={0}
int	lcd_status = 1

Detailed Description

source file that has LCD display drivers - ST7291

Macro Definition Documentation

DRAW_BUFFER_NUM_LINESS

#define DRAW_BUFFER_NUM_LINESS   10

LCD_AMBER

#define LCD_AMBER   0x0BFC

LCD_BLACK

#define LCD_BLACK   0x0000

LCD_BLUE

#define LCD_BLUE   0x001F

LCD_DATACMD_GPIO

#define LCD_DATACMD_GPIO   383

LCD_GREEN

#define LCD_GREEN   0x07E0

LCD_IO_CONTROL_PIN

#define LCD_IO_CONTROL_PIN   467

LCD_RED

#define LCD_RED   0xF800

LCD_RST_GPIO

#define LCD_RST_GPIO   380

LCD_SPICS_GPIO

#define LCD_SPICS_GPIO   379

LCD_WHITE

#define LCD_WHITE   0xFFFF

MAX_BUFFER_SIZE

#define MAX_BUFFER_SIZE   ((ST7735_SCREEN_WIDTH * ST7735_SCREEN_HEIGHT * 3) + 16)

MAX_CHUCK_SIZE

#define MAX_CHUCK_SIZE   1024

MY_DISP_HOR_RESS

#define MY_DISP_HOR_RESS   132

MY_DISP_VER_RESS

#define MY_DISP_VER_RESS   132

ST7291_CASET

#define ST7291_CASET   0x2A

ST7291_COLMOD

#define ST7291_COLMOD   0x3A

ST7291_DISPOFF

#define ST7291_DISPOFF   0x28

ST7291_DISPON

#define ST7291_DISPON   0x29

ST7291_FRMCTR1

#define ST7291_FRMCTR1   0xB1

ST7291_FRMCTR2

#define ST7291_FRMCTR2   0xB2

ST7291_FRMCTR3

#define ST7291_FRMCTR3   0xB3

ST7291_GMCTRN1

#define ST7291_GMCTRN1   0xE1

ST7291_GMCTRP1

#define ST7291_GMCTRP1   0xE0

ST7291_GMSET

#define ST7291_GMSET   0xF2 /* Gammas Adjustment. */

ST7291_INVCTR

#define ST7291_INVCTR   0xB4

ST7291_MADCTL

#define ST7291_MADCTL   0x36 /* Memory Data Access Control */

ST7291_NORON

#define ST7291_NORON   0x13

ST7291_PWCTR1

#define ST7291_PWCTR1   0xC0

ST7291_PWCTR2

#define ST7291_PWCTR2   0xC1

ST7291_PWCTR3

#define ST7291_PWCTR3   0xC2

ST7291_PWCTR4

#define ST7291_PWCTR4   0xC3

ST7291_PWCTR5

#define ST7291_PWCTR5   0xC4

ST7291_RAMWR

#define ST7291_RAMWR   0x2C

ST7291_RASET

#define ST7291_RASET   0x2B

ST7291_SLPOUT

#define ST7291_SLPOUT   0x11

ST7291_SW_RESET

#define ST7291_SW_RESET   0x01

ST7291_VMCTR1

#define ST7291_VMCTR1   0xC5

ST7735_SCREEN_HEIGHT [1/2]

#define ST7735_SCREEN_HEIGHT   132

ST7735_SCREEN_HEIGHT [2/2]

#define ST7735_SCREEN_HEIGHT   132

ST7735_SCREEN_WIDTH

#define ST7735_SCREEN_WIDTH   160

Function Documentation

GPIO_pin_SetValue()

int GPIO_pin_SetValue ( int GPIONUM, int Value )

extern

Gpio set value high or low.

Parameters

GPIONUM	gpio pin number
Value	[1- high] [0- low]

Returns

API_SUCCESSS_test on success or AP_FAILURE_test on failure

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lcd_init()

void lcd_init

(

void

)

Function to perform LCD functionality.

Parameters

NULL

Returns

API_SUCCESSS_test on success or API_FAILURE_test on failure

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lcd_refresh()

void lcd_refresh

(

lv_color_t *

framebuf

)

Refreshes the screen.

Parameters

*framebuf

pointer to the buffer value

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lcd_refreshbuf()

void lcd_refreshbuf

(

lv_color_t *

framebuf

)

Refreshes the screen.

Parameters

*framebuf

pointer to the buffer value

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LCD_RST()

void LCD_RST

(

void

)

LCD reset.

Parameters

none

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lcd_send_data()

void lcd_send_data	(	uint16_t	x_start,
		uint16_t	y_start,
		uint16_t	x_end,
		uint16_t	y_end,
		uint8_t *	p )

Send data pixelwise.

Parameters

x_start	starting address of x axis
y_start	starting address of y axis
x_end	ending address of the x axis
y_end	ending address of the y axis
*p	pixel

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LCD_SET_DATACMD()

int LCD_SET_DATACMD

(

char

mode

)

Sets the data/cmd line to receive the data nased on the modes.

Parameters

mode	[0- command], [1- data]

Returns

API_SUCCESSS_test on success or AP_FAILURE_test on failure

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LCD_SPI_BUFFDATAWRITE()

int LCD_SPI_BUFFDATAWRITE ( uint8_t * data, uint16_t datalen )

extern

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LCD_SPI_BUFFWRITE()

int LCD_SPI_BUFFWRITE ( uint8_t * data, uint16_t datalen )

extern

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LCD_SPI_CMDWRITE()

int LCD_SPI_CMDWRITE ( uint8_t cmd )

extern

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LCD_SPI_DATAWRITE()

int LCD_SPI_DATAWRITE ( uint8_t data )

extern

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ST7291_fillScreenColor()

uint8_t ST7291_fillScreenColor

(

uint16_t

screenBasecolor

)

Function to fill the screen colour pixel by pixel.

Parameters

screenBasecolor	RGB value of the colour to be filled
pixcelNum	Total number of pixcel on the LCD screen

Returns

1 on completion

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ST7291_init()

int ST7291_init

(

void

)

Initialization of the LCD ST7291_chip.

Parameters

none

Returns

0 on completion

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ST7291_setScreenColor()

uint8_t ST7291_setScreenColor	(	uint16_t	screenBasecolor,
		uint32_t	pixcelNum )

function to fill the screen color

Parameters

screenBasecolor	- hex value of the color
pixcelNum	- pixel number

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ST7291_setScreenWindow()

uint8_t ST7291_setScreenWindow	(	uint16_t	x1,
		uint16_t	y1,
		uint16_t	x2,
		uint16_t	y2 )

function to setting the window color

Parameters

x1	- start x position
y1	- start y position
x2	- end x position
y2	- end y position

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Variable Documentation

colours

int32_t colours[6] = { LCD_RED, LCD_GREEN, LCD_AMBER,LCD_BLUE, LCD_WHITE,LCD_BLACK}

errbuf

char errbuf[100] ={0}

lcd_status

int lcd_status = 1