LCD.c File Reference

sets and writes framebuffer More...

#include "LCD.h"
#include "Driver.h"

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Functions
esp_err_t	iLCD_allocateFramebuffer (uint16_t ***pData)
	allocate framebuffer More...
void	vLCD_writeChar (uint16_t u16xPos, uint16_t u16yPos, char cCharacter, uint16_t u16ColorFont, uint16_t u16ColorBackground)
	write string/text into framebuffer More...
esp_err_t	iLCD_init (void)
	init More...
esp_err_t	iLCD_clearFramebuffer (uint16_t u16Color)
	clear complete framebuffer with a color More...
esp_err_t	iLCD_writeString (uint16_t u16xPos, uint16_t u16yPos, char *pcText, uint16_t u16ColorFont, uint16_t u16ColorBackground)
	write string/text into framebuffer More...

Variables
uint16_t **	pu16Framebuffer
static const uint8_t	font6_8 [][6]

Detailed Description

sets and writes framebuffer

Author

Hendrik Schutter

Version

V1.0

Date

03.11.2020

This code displays graphics on the 320x240 LCD on an ESP-WROVER_KIT board.

Some info about the ILI9341/ST7789V: It has an C/D line, which is connected to a GPIO here. It expects this line to be low for a command and high for data. We use a pre-transmit callback here to control that line: every transaction has as the user-definable argument the needed state of the D/C line and just before the transaction is sent, the callback will set this line to the correct state.

Function Documentation

iLCD_allocateFramebuffer()

esp_err_t iLCD_allocateFramebuffer

(

uint16_t ***

pData

)

allocate framebuffer

Parameters

pointer

of framebuffer two dimensional array

Returns

esp error code

Author

Hendrik Schutter

Date

3.11.2020

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iLCD_clearFramebuffer()

esp_err_t iLCD_clearFramebuffer

(

uint16_t

u16Color

)

clear complete framebuffer with a color

Parameters

RGB586

color code

Returns

esp error code

Author

Hendrik Schutter

Date

3.11.2020

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iLCD_init()

esp_err_t iLCD_init

(

void

)

init

Parameters

void

Returns

int

Author

Hendrik Schutter

Date

3.11.2020

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iLCD_writeString()

esp_err_t iLCD_writeString	(	uint16_t	u16xPos,
		uint16_t	u16yPos,
		char *	pcText,
		uint16_t	u16ColorFont,
		uint16_t	u16ColorBackground
	)

write string/text into framebuffer

Parameters

uint16_t	u16xPos
uint16_t	u16yPos
char	*pcText
RGB586	color code for font uint16_t u16ColorFont
RGB586	color code for background uint16_t u16ColorBackground

Returns

esp error code

Author

Hendrik Schutter

Date

4.11.2020

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vLCD_writeChar()

void vLCD_writeChar	(	uint16_t	u16xPos,
		uint16_t	u16yPos,
		char	cCharacter,
		uint16_t	u16ColorFont,
		uint16_t	u16ColorBackground
	)

write string/text into framebuffer

Parameters

uint16_t	u16xPos
uint16_t	u16yPos
char	cCharacter
RGB586	color code for font uint16_t u16ColorFont
RGB586	color code for background uint16_t u16ColorBackground

Returns

esp error code

Author

Hendrik Schutter

Date

4.11.2020

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Variable Documentation

font6_8

const uint8_t font6_8[][6]

static

pu16Framebuffer

uint16_t** pu16Framebuffer