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Tektronics 1502 TDR vs. 1503

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_Wim_:

--- Quote from: JesusCastane on December 06, 2022, 10:04:29 am ---I was definitely considering to use an Arduino to interface with the unit.
I've been reading the SP232 module user manual to understand how it works but it didn't occur to me that the arduino wasn't going to be fast enough.
This might be more complicated that I thought.

Thanks for sharing the arduino code. I will review it later.
Maybe it's a case for a Raspberry Pi... need to look into this. Might be an interesting project.

--- End quote ---

Yes, this also caught me by surprise. The mean reason was (if I remember correctly) that the strobe/ack (RD/WR) pulses were very short (<1µs). An Arduino together with an 82C55 interface chip will for sure be fast enough, as the strobe pulses are only used by the 82C55, and the Arduino only uses the bus. In that case even an Arduino Uno will be more than fast enough.


As to the Raspberry Pi, I would expect it to have a higher latency than an STM32 or ESP32, and it will also not be able to handle sub µs hardware interrupts also...

JesusCastane:

--- Quote from: _Wim_ on December 06, 2022, 07:05:32 pm ---Yes, this also caught me by surprise. The mean reason was (if I remember correctly) that the strobe/ack (RD/WR) pulses were very short (<1µs). An Arduino together with an 82C55 interface chip will for sure be fast enough, as the strobe pulses are only used by the 82C55, and the Arduino only uses the bus. In that case even an Arduino Uno will be more than fast enough.


As to the Raspberry Pi, I would expect it to have a higher latency than an STM32 or ESP32, and it will also not be able to handle sub µs hardware interrupts also...

--- End quote ---

I see.
I never used a 82C55 before. I will need to look into it.
Thanks for sharing all these comments. I'll let you know if i get somewhere with this.

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