<I will upload the pic a bit later … > The M4 Olimex board have two buttons and I accidentally noticed that one of the buttons was loosening. Easy to fix with super-glue to add mechanical support, but would have been even easier to solve if routed a bit more wisely on the PCB. Dealing…
This one is from Olimex and is based on STM32F407 LQFP144. It has Ethernet, TF Card and 4 x 20 headers + Arduino Uno compatible headers. As for the Arduino headers pay notice to the capacitors on the bottom half that will be in the way of most Arduino Shields. Also I am a bit…
This is a STM32F429. It has a 64Mbit SRAM on the back. It uses the larger LQFP176 chip. This was a bit of a surprise because the header is 2.0 pitch making it incompatible with bread-boards.
This dev-hit is from HAOYU Electronics who produce some good, affordable kits. This is a LQFP144 version of STM32F407. This is basically the same as STM32F405 with Ethernet added. This board also have 128Mb Flash and 1Mb SRAM mounted. Again 2.54 pich headers enabling vero-board mounting. My only comment on this kit is that it…
This is another Cortex M4 that is a bit special. It runs on 72Mhz and have far less Flash/SRAM. It do however have 4 x 5Mhz ADC’s, Op amps and 3 x Motor Controllers on chip. Pitch 2.54 dev-kit so it can be mounted on a vero-board. Mounting dual headers on a vero-board is a…
This is one of the official STM32F429 kit’s using a LQFP144 with a LCD display and 64Mbit of SRAM + a ST-Link. You simply connect the USB on the ST-Link and start programming. This one has 2.54 pich headers that is possible to mount on a vero-board.
This is the 10.- USD dev kit for 5LP I spoke of earlier. P&P comes in addition, but I will encourage people to get one of these to play around with because it is not a “normal” ARM MCU. It actually contain two MCU’s as Cypress also add a programer at right. This can be…
Assuming using the external memory bus will work as I hope it also open up the possibility of a low cost 2-4 channel, 8 bit Oscilloscope at 60-100Mhz sampling speed. Using discrete components I should be able to create a high speed ADC etc. This should be sufficient for a 10Mhz Oscilloscope where you have…
I am not sure this will work, but many of the STM32’s have an external memory interface that is capable of a very decent clock speed. An F7 clocks the memory bus at 108Mhz, a F42x at 90Mhz and F405 at 60Mhz etc. The data-bus vary from 16 to 32 pins, but you need the…
Early morning planning! Whenever dealing with applications that will be depending on high performance it is wise to check out bottlenecks asap. This apply to all risk scenarios based on assumptions, simply check them out first because they might force your next step. I have three checkpoints coming up: (1) Speed of SPI with a Hat…