Broadcom WICED SDK for Amazon Dash

History

Based on the work of maximus64 and dekuNukem. Please visit their repositories for more information.

GPIO table in maximus64's platform.c was thrown out and reversed from dekuNukem's Cottonelle.bin and a sample binary compiled from the WICED SDK 2.4.1. The pin out here was also quite handy.

What Works

• Wi-Fi
• LED
• Button
• UART
• SWD
• SPI flash

To Do

• I2S microphone (see staging directory for WIP)

Building

• Download the Broadcom WICED SDK 3.3.1
• Create a git repository out of it
• git apply the patches in this repository

Development tools

• The cheapest eBay Mini ST-Link V2 is what I use to flash firmware.
• Note that the Amazon Dash comes with its internal flash memory write protected, OpenOCD can help with unlocking it.

stm32f2 unlock 0 # this will also mass erase your Dash's flash

• stlink is what I use to flash binaries built without WICED.

Examples

• Some example code exists in the snip directory.
• Build them like this:

./make AMAZONDASH-snip.sflash

Building a custom WICED firmware

./make AMAZONDASH-snip.sflash download run JTAG=stlink-v2

Output

Starting WICED v3.3.1
Platform AMAZONDASH initialised
Started ThreadX v5.6
Initialising NetX_Duo v5.7_sp2
Creating Packet pools
WWD SDIO interface initialised
WLAN MAC Address : 6C:0B:84:8A:6C:F0
WLAN Firmware    : wl0: Nov  7 2014 16:03:45 version 5.90.230.12 FWID 01-43ca27a5
found spi flash device 0x202015
spi flash has size 0x200000 bytes
about to erase spi flash..
sflash_chip_erase == 0
erasing first block of spi flash..
sflash_sector_erase == 0
sflash_write == 0
sflash_read == 0
memcmp(buf, buf2) == 0
that's all folks!