ESP8266 datasheet(45/117 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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45 / 117 page

4. SPI Communication User Guide

PIN_FUNC_SELECT(PERIPHS_IO_MUX_MTCK_U, 2);//configure io to spi

mode

PIN_FUNC_SELECT(PERIPHS_IO_MUX_MTMS_U, 2);//configure io to spi

mode

PIN_FUNC_SELECT(PERIPHS_IO_MUX_MTDO_U, 2);//configure io to spi

mode

SPIInit(SpiNum_HSPI, &hSpiAttr);

uint32_t value = 0xD3D4D5D6;

uint32_t sendData[8] ={ 0 };

SpiData spiData;

os_printf("\r\n =============

spi init master

=============

\r\n");

Test 8266 slave.Communication format: 1byte command + 1bytes

address + x bytes Data.

os_printf("\r\n Master send 32 bytes data to slave(8266)\r\n");

os_memset(sendData, 0, sizeof(sendData));

sendData[0] = 0x55565758;

sendData[1] = 0x595a5b5c;

sendData[2] = 0x5d5e5f60;

sendData[3] = 0x61626364;

sendData[4] = 0x65666768;

sendData[5] = 0x696a6b6c;

sendData[6] = 0x6d6e6f70;

sendData[7] = 0x71727374;

spiData.cmd = MASTER_WRITE_DATA_TO_SLAVE_CMD;

spiData.cmdLen = 1;

spiData.addr = &value;

spiData.addrLen = 4;

spiData.data = sendData;

spiData.dataLen = 32;

SPIMasterSendData(SpiNum_HSPI, &spiData);

Espressif

! /!

37 104

2017.05

ESP8266 Datasheet(PDF) 45 Page - ESPRESSIF SYSTEMS (SHANGHAI) CO., LTD.