ESP8266 datasheet(38/117 Pages) ESPRESSIF

Part #	ESP8266

Description	General Purpose Input/Output Interface (GPIO)

PDF	117 Pages

Scroll/Zoom	100%

Manufacturer	ESPRESSIF [ESPRESSIF SYSTEMS (SHANGHAI) CO., LTD.]

Direct Link	https://www.espressif.com/

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38 / 117 page

4. SPI Communication User Guide

4.5.2. API Description

4.5.2.1. SPIInit

Description

SPI module initialization.

Function

void SPIInit(SpiNum spiNum, SpiAttr* pAttr);

Return value

Null

4.5.2.2. SPIMasterCfgAddr

Description

Conﬁgure address register.

Function

void SPIMasterCfgAddr(SpiNum spiNum, uint32_t addr);

Return value

Null

MASTER_READ_STATUS_FROM_SLAVE_CMD

Read status register command in ESP8266 slave

mode.

! Note:

For details that require attention, please refer to ESP8266 SDK API Guide.

Parameter

Description

spiNum

[in] choose SPI and HSPI.

pAttr

[in] a pointer to SpiAttr structure.

! Notes:

•

In slave mode, the default CMD length is 8 bits, ADDR length 8 bits, DATA length 32 bytes.

•

No support currently for transmission with only DATA.

•

The maximum DATA length is 64 bytes in a single transmission.

Parameter

Description

spiNum

[in] choose SPI and HSPI.

addr

[in] address to set.

Espressif

! /!

30 104

2017.05

ESP8266 Datasheet(PDF) 38 Page - ESPRESSIF SYSTEMS (SHANGHAI) CO., LTD.

ESP8266 Datasheet(HTML) 38 Page - ESPRESSIF SYSTEMS (SHANGHAI) CO., LTD.

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