ESP8266 datasheet(39/117 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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4. SPI Communication User Guide

4.5.2.3. SPIMasterCfgCmd

Description

Conﬁgure SPI command register.

Function

Void SPIMasterCfgCmd(SpiNum spiNum, uint32_t cmd);

Return value

Null

4.5.2.4. SPIMasterSendData

Description

Master sends data according to the pInData buffer.

Function

int SPIMasterSendData(SpiNum spiNum, SpiData* pInData);

Return value

•

0: Success

•

Others: Failure

! Notes:

•

If the address length is over 32 bits, the user needs to conﬁgure the SPI_WR_STATUS register.

•

Address transmission is in high-byte order.

Parameter

Description

spiNum

[in] choose SPI and HSPI.

cmd

[in] command value to set.

! Note:

CMD length is up to 16 bits and the transmission is in low-byte order.

Parameter

Description

spiNum

[in] choose SPI and HSPI.

pInData

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

address, data buffer and length should be speciﬁed.

! Note:

DATA transmission is in low-byte order.

Espressif

! /!

31 104

2017.05

ESP8266 Datasheet(PDF) 39 Page - ESPRESSIF SYSTEMS (SHANGHAI) CO., LTD.

ESP8266 Datasheet(HTML) 39 Page - ESPRESSIF SYSTEMS (SHANGHAI) CO., LTD.

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