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5. SPI Overlap & Display Application Guide

SET_PERI_REG_MASK(SPI_PIN(HSPI), SPI_CS1_DIS |SPI_CS2_DIS)

If normal GPIO is used for CS, the following is needed:

#define DISABLE_CS()\

SET_PERI_REG_MASK(SPI_PIN(HSPI), SPI_CS0_DIS |SPI_CS1_DIS |

SPI_CS2_DIS)

Location:

\app\include\user_lcd.h in the DEMO.

Please refer to

Chapter 4 EPS8266 SPI Communication User Guide for more

information about other host SPI communication.

5.4. Display Screen Console Program DEMO

The DEMO is used to print simple strings on display screens, including LCD for parameter

display and debug printing. DEMO driver supports two screens currently, i.e. 3.5-inch

TM035PDZV36 480*320 TFT colored LCD and Zhong JY. Tech 1.3-inch 128*64OLED. The

driver programs can communicate with the display screen via ESP8266 HSPI interface

under Overlap mode.

Under SPI Overlap mode, the two screens and 8266 external program ﬂash chip share

SCLK, MOSI and MISO signals on the SPI bus. Different CS signals are used in different

device.

5.4.1. Connection Description

Zhong JY. Tech 1.3-inch OLED Connection

The signals in OLED, i.e. SCLK, MOSI, CS, DC, RESET connects to the pins in 8266, i.e.

SD_CLK, SD_DATA1, GPIO0, MTCK, GPIO5 respectively. The VCC in OLED and GND

connects to 3.3V network and GND on DEMO board.

Tian Ma 3.5-inch TFT LCD

The signals in TFT, i.e. SCLK, MOSI, CS, RESET connects to the pins in 8266, i.e.

SD_CLK, SD_DATA1, U0TXD, GPIO5 respectively. The VCC in OLED and GND connects

to 3.3V network and GND on DEMO board.

5.4.2. API Function Description

1. void screen_init(void)

Function:

Display screen initialization program. Call the function after it is enabled.

Location:

\app\user\user_lcd.c and \app\include\user_lcd.h

Espressif

! /!

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2017.05

ESP8266 Datasheet(PDF) 56 Page - ESPRESSIF SYSTEMS (SHANGHAI) CO., LTD.