Elastic Sheep

Because elasticdog was already taken

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Entries Tagged as 'Uncategorized'

Bluetooth module firmware dump

June 28th, 2012 · 1 Comment · Uncategorized

With a parallel-SPI adapter and the BlueSuite tools you can dump the firmware of your Bluetooth module. Firmware dump Firmware dump is done with the BlueFlash utility. Stop the processor: if the connection with the module is successful, information about the device will be displayed. Click Firmware ID to display the loader and stack version. [...]

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Bluetooth module parallel-SPI interface

June 28th, 2012 · 5 Comments · Uncategorized

The BC417143-based module can be programmed through its SPI interface using a simple parallel port interface. I am using the circuit published on Byron’s blog. The SPI protocol is bit-banged on the parallel port of the PC. The 5V to 3.3V level adaptation is done using resistor dividers. The SPI pins are accessed through a [...]

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New toy

June 18th, 2012 · 2 Comments · Uncategorized

I have been interested by the FPGA technology for some time so finally here is a new toy that joins my workbench: a DE0-Nano board from Terasic. Smaller than an Arduino but with the same spirit of a platform opened to experimentation and not constrained by too much pre-wired peripherals. It’s up to you what [...]

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Babyphone hardware design

January 25th, 2012 · No Comments · Uncategorized

Here are some details about the hardware design of my babyphone project. Case reuse One of the project goal was to reuse as much of the original speakerphone case as possible, including the power switch, volume control potentiometer, front leds and keyboard. I though that as the box already contained amplifiers circuits for the speaker [...]

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Babyphone audio playback

January 21st, 2012 · No Comments · Uncategorized

The final circuit has been built inside the phone enclosure, including amplifiers for the speaker and the microphone. Playback and record modules are developped an tested but the application code only supports playback for the moment. Next I need to improve the matrix keyboard driver to allow multiple key detection to trigger the record of [...]

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