If you've been looking for this, chances are you saw Frank's post on the subject, while it contains very useful information and he mentions reading JPEG, he didn't explain his approach in details, so here's my soultion.
First, let me reiterate the issue with JPEG and the STM32, as you already know JPEG images are compressed, so you don't know the exact image size beforehand, you expect to read it after a complete...
Wednesday, July 9, 2014
Tuesday, June 3, 2014
OV9650 Breakout
I made this breakout for the OV9650 a while ago, and I've been waiting to test it before sharing, I finally had the chance to do so, I used an FPGA this time for testing, and here's the result:
The breakout has two SOT23 LDOs for the sensor's core, digital and analog supplies and requires a single external 3.3v supply, note that most sensors have internal regulators for the core supply, so...
Saturday, April 26, 2014
Running ZPU Softcore on Lattice ICE40
So I got my hands on a new FPGA development board, a Lattice ICE40HX8K eval kit, this is a really basic low-cost board/breakout with a few LEDS, EEPROM and a dual FTDI2232H UART/FIFO, that you can use for programming the EEPROM/FPGA...What I really love about this board, other than the low cost and many I/Os, is that the second FTDI port is configured as a serial port and connected to the FPGA, so basically you...
Saturday, February 8, 2014
OpenMV Update: MicroPython, More I/O, uSD and Lots of Other Things!
Time for another update, sorry this took me so long, I've been very busy working on OpenMV, the good news is I have lots of new features implemented! There's a new (smaller :D) hardware revision with more I/O (USART/I2C and SPI) and a uSD socket, MicroPython support, an IDE for the camera, and for those of you who have been wondering, I'm working with Michael Shimniok from Bot-Thoughts on doing a Kickstarter campaign...
Saturday, January 18, 2014
Overclocking the STM32F4
I've been doing some tests with the STM32F407 to see how fast it can go, STMicro has released an almost identical one that runs at 180MHz, is it a marketing thing ? will they release a 200MHz version in a few months? who cares, anyway, I was able to run the STM32F407 at 240MHz without any "obvious" problems, in addition to overclocking, the code listed below lets you set some different frequencies, which could be useful for...
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