ESP8266 datasheet(22/117 Pages) ESPRESSIF

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3. SPI Compatibility Mode User Guide

\XTCOM_UTIL.

eagle.app.v6.irom0text.bin is all the functions of FLASH chip read

directly through the SPI by CPU CACHE in the ESP8266 program.

•

Run

BinToArray.exe in SDIO communication demo\. Transfer

eagle.app.v6.flash.bin in SDIO communication demo

\esp_iot_sdk_v0.9.3_sdio_demo\ bin to ANSI C format array. The new array will be

saved in

D:\. The target route of BinToArray.exe must be D:\. If there is not a D:\, you

can (1) use a virtual machine with a D:\; (2) connect the device to a U disk named D:\;

or (3) search online for a tool that can transfer bin to array.

•

If there is a D:\, name

hexarray.c in D:\ as eagle_fw.h, and deﬁne the array name as

const unsigned char eagle_fw[] =....... Replace

eagle_fw.h in SDIO communication

demo\STM32\ Eagle_Wifi_Driver\ egl_drv_simulation\ (you can copy the array

name and document name in the old

eagle_fw.h, rename the hexarray.c and use it

to replace the old

eagle_fw.h.). Before starting the chip, write eagle.app.v6.ﬂash.bin

into the ESP8266 memory.

eagle.app.v6.flash.bin should be transferred to array,

and be written into the ESP8266 through STM32.

•

Use the IAR platform to open

EglWB.ewp.eww in SDIO communication

demo\STM32\IAR\ to compile the programs.

3.2.3. ESP8266 FLASH Software Downloading

1. Use the serial line to connect the ESP_IOT reference board and the computer, and

connect them with a 5V power supply. Connect J67 to the 2 pins on the right (enable

the FLASH chip in the HSPI interface), and J66 to the 2 pins on the left (disable the

FLASH chip in the SPI interface). Set MTD0, GPIO0 and GPIO2 to the UART mode 0,

0,1 (up, up, down).

2. Double-click XTCOM_UTIL.exe in SDIO communication demo\XTCOM_UTIL. Click

Tools -> Conﬁg Device, and choose Com interface. Baud Rate: 115200. Click Open,

and you will see open Success. Click Connect, and push the H Flash board power,

you will see the connection is completed.

3. Click API TEST(A)->(5) HSpiFlash Image Download, and choose

eagle.app.v6.irom0text.bin in SDIO communication demo\XTCOM_UTIL. Offset:

0x40000. Click Download, and the downloading will be completed.

3.2.4. ESP8266 FLASH Software Downloading

Use the pin header to connect the ESP_IOT reference board and the Red Dragon demo

board. The details are shown below:

In the Red Dragon demo board JP1:

J62 pin headers in the ESP_IOT reference board (bottom-up)

GND

VSS/GND

SPI_CLK

SDIO_CLK

Espressif

! /!

14 104

2017.05

ESP8266 Datasheet(PDF) 22 Page - ESPRESSIF SYSTEMS (SHANGHAI) CO., LTD.

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