SpiMX Shield (uses Arduino)

[Tec]

Hi, Im still waiting for printed circuit boards to arrive, I will have to get back to you on this when I have assembled some..

[Tec]

Hi I have assembled some boards, and just started getting it working with the Arduino code based on your file, thanks.. will keep you posted.

[joop]

Good news, thank you!

[6666]

Hi Tec I am interested in this project to.
Cheers

[turboaleks]

I am following this one, too. My el cheapo Leonardo has just arrived from China.

[Tec]

Arduino Code

I have been testing with Arduino code.

There are problems using Arduino Code for the firmware.

1. Timer0 is used by the Arduino operating system.

2. Other interrupts are delayed and inconsistent.

3. Analog inputs used by this project rely on the ATMega32U4 internal reference, and fast analog input sampling.


The attached code sort-of works, however because the analog sampling is Slower and not repeatable, and the timing of interrupts is affected by the Arduino operating environment; the performance is worse than using the firmware written in C. It is difficult (or impossible) to get pulses, gates and samples to happen at exactly the same time every time, This is necessary for best performance on this detector.

[Tec]

Hi Joop,

I can send you one of these now, (No cost), just need an address.

It is running with the Atmel Firmware. and has a 'DFU Bootloader' So the firmware can be updated if necessary using the Atmel ' Flip' Application.

This firmware is still much quieter, smoother than I have been able to get with the Arduino version..

Tec

[joop]

Hi Tec,

yes Timer0 can mess things up really bad. I should have thought about this. Can you try disabling Timer0? Just add

TTCR0A=0;
TTCR0B=0;

to the setup routine. I am not sure if this will work, since you are using sei() and cli() functions.
Problem with disabling Timer0 is that you can not use any of the delay, millis, micros or serial functions.

It would be great to get my hands on a board, will send you my address in a private mail. Thanks!

[Chet]

Hi joop, Tec

Did you make any more progress on this project? I have a MAX32 board and would like to try something like this.

Thank you,
Chet

[Tec]

It is now Spi-MX Pinnacle