160 by 128 pixel LCD More...

Macros
#define	SDC_CS GPIOB

#define	SDC_CS_PIN (1<<0)

#define	SDC_CS_INDEX (PB0INDEX)

#define	SDC_CS_LOW() (SDC_CS->DOUTCLR31_0 = SDC_CS_PIN)

#define	SDC_CS_HIGH() (SDC_CS->DOUTSET31_0 = SDC_CS_PIN)

#define	TFT_CS GPIOB

#define	TFT_CS_PIN (1<<6)

#define	TFT_CS_INDEX (PB6INDEX)

#define	TFT_CS_LOW() (TFT_CS->DOUTCLR31_0 = TFT_CS_PIN)

#define	TFT_CS_HIGH() (TFT_CS->DOUTSET31_0 = TFT_CS_PIN)

#define	TFT_DC GPIOB

#define	TFT_DC_PIN (1<<16)

#define	TFT_DC_INDEX (PB16INDEX)

#define	TFT_DC_LOW() (TFT_DC->DOUTCLR31_0 = TFT_DC_PIN)

#define	TFT_DC_HIGH() (TFT_DC->DOUTSET31_0 = TFT_DC_PIN)

#define	TFT_RST GPIOB

#define	TFT_RST_PIN (1<<15)

#define	TFT_RST_INDEX (PB15INDEX)

#define	TFT_RST_LOW() (TFT_RST->DOUTCLR31_0 = TFT_RST_PIN)

#define	TFT_RST_HIGH() (TFT_RST->DOUTSET31_0 = TFT_RST_PIN)

Functions
void	SPI_OutData (char data)
	Output data. More...

void	SPI_OutCommand (char command)
	Output command. More...

void	SPI1_Reset (void)
	Reset LCD. More...

void	CS_Init (void)
	SDC CS initialization. More...

void	SPI1_Init (void)
	initialize SPI1 More...

void	TFT_OutCommand (char command)
	Output command. More...

void	TFT_OutData (char data)
	Output data. More...

Detailed Description

160 by 128 pixel LCD

Software driver functions for ST7735R display
This is a library for the Adafruit 1.8" SPI display.<br> This library works with the Adafruit 1.8" TFT Breakout w/SD card
-—> http://www.adafruit.com/products/358
as well as Adafruit raw 1.8" TFT display
-—> http://www.adafruit.com/products/618
Check out the links above for our tutorials and wiring diagrams
These displays use SPI to communicate, 4 or 5 pins are required to interface (RST is optional) Adafruit invests time and resources providing this open source code, please support Adafruit and open-source hardware by purchasing products from Adafruit! Written by Limor Fried/Ladyada for Adafruit Industries. MIT license, all text above must be included in any redistribution

Version: ECE445M RTOS

Author: Daniel Valvano and Jonathan Valvano

Copyright: Copyright 2025 by Jonathan W. Valvano, valva.nosp@m.no@m.nosp@m.ail.u.nosp@m.texa.nosp@m.s.edu,

Warning: AS-IS

Note: For more information see http://users.ece.utexas.edu/~valvano/

Date

December 27, 2025 interface

ST7735 160 by 128 pixel LCD

Adafruit ST7735R pins
Pin	Connection	Description
10	+3.3	Backlight
9	PB7	SPI1 MISO (used for SDC)
8	PB9	SPI1 SCLK clock out
7	PB8	SPI1 PICO data out
6	PB6	GPIO CS0=TFT_CS
5	PB0	CARD_CS (used for SDC)
4	PB16	Data/Command(GPIO), high for data, low for command
3	PB15	RESET, low to reset, (GPIO)
2	+3.3	VCC
1	Gnd	ground

HiLetgo ST7735 TFT and SDC pins
signal	Pin	Connection
LED-	16	TFT, to ground
LED+	15	TFT, to +3.3 V
SD_CS	14	SDC, to PB0 chip select
MOSI	13	SDC, to PB8 MOSI
MISO	12	SDC, to PB7 MISO
SCK	11	SDC, to PB9 serial clock
CS	10	TFT, to PB6 SPI1 CS0
SCL	9	TFT, to PB9 SPI1 SCLK
SDA	8	TFT, to PB8 MOSI SPI1 PICO
A0	7	TFT, to PB16 Data/Command, high for data, low for command
RESET	6	TFT, to PB15 reset (GPIO), low to reset
NC	3,4,5	not connected
VCC	2	to +3.3 V
GND	1	to ground

Macros

Functions

Detailed Description