ESP8266 datasheet(40/117 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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40 / 117 page

4. SPI Communication User Guide

4.5.2.5. SPIMasterRecvData

Description

Master receives data.

Function

int SPIMasterRecvData(SpiNum spiNum, SpiData* pOutData);

Return value

•

0: Success

•

Others: Failure

4.5.2.6. SPISlaveSendData

Description

Upload data to SPI W8 ~ W15.

Function

int SPISlaveSendData(SpiNum spiNum, uint32_t *pInData, uint8_t

inLen);

Return value

•

0: Success

•

Others: Failure

4.5.2.7. SPISlaveRecvData

Description

Slave receives data.

Parameter

Description

spiNum

[in] choose SPI and HSPI.

pOutData

[in] a pointer to SpiData structure. The command, address, data buffer

and length should be speciﬁed.

Parameter

Description

spiNum

[in] choose SPI and HSPI.

pInData

[in] a pointer to buffer.

inLen

[in] buffer length.

! Notes:

•

This function is only used to upload the data to SPI W8 ~ W15. Upon receiving

MASTER_READ_DATA_FROM_SLAVE_CMD, ESP8266 will automatically transmit data.

•

The default value is 32 bytes, with 64 bytes the maximum.

Espressif

! /!

32 104

2017.05

ESP8266 Datasheet(PDF) 40 Page - ESPRESSIF SYSTEMS (SHANGHAI) CO., LTD.

ESP8266 Datasheet(HTML) 40 Page - ESPRESSIF SYSTEMS (SHANGHAI) CO., LTD.

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