Synchronous serial communication. 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

Synchronous serial communication.

SPI uses a chip select, clock, data out and data in. This interface is used for TFT and SDC This interface can be used for MKII LCD and the ST7735R LCD

Version: RTOS v7.0

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

Dec 27, 2025

SPI-LCD pins
Pin	Function	Description
PB9	SPI1 SCLK <tdLCD SPI clock (SPI)
PB6	GPIO CS	LCD SPI CS
PB0	GPIO CS	SDC SPI CS
PB8	SPI1 PICO	LCD SPI data (SPI)
PB7	SPI1 POCI	SCD SPI data (SPI)
PB15	GPIO	J2.17 LCD !RST =1 for run, =0 for reset
PB16	GPIO	J4.31 LCD D/C RS =1 for data, =0 for command

Macros

Functions

Detailed Description