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Forum Index : Microcontroller and PC projects : SC pico backpack - adafruit RP2040 metro - esy I2C connectors

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zeitfest
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Joined: 31/07/2019
Location: Australia
Posts: 482
Posted: 08:11am 31 Dec 2023
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I have used the Silicon Chip Pico backpack for a while and it has been good, (caveat I didn't install the audio section).

My programs run quite well on it so far. Mainly they are a C program running an  interpreter, with the arduino C++ system handling it. The numerical test results are the same as on other systems. It is at the stage of running examples, astronomical programs and a programmable calculator, so it is looking promising.

As an idea to diversify a bit, I have also tried the Adafruit RP2040 Metro board, which also has a pico rp2040. It is quite good, and inexpensive !
Connecting while holding the boot switch down enables a UF2 file to be dragged to the "disk" under windows, same as normal, no worries. The arduino IDE system will also generate and install uf2 as part of its routine.

Serial output from the pico runs with Teraterm as usual.

The backpack has a SDcard socket using spi and RTC (I2C). The Metro has slight differences which resolved OK so far.
The chip-select pin on the metro is 23. After specifying that, the card access is fine.
There is no RTC chip on the metro board however there is I2C with the lines set up.  I connected a RTC module on I2C, altering the example to specify 16 and 17 for SDA and SCL (Wire instead of Wire1), no worries.

The I2C socket/connector system is excellent - I think it is called Quiic or similar - has the two power/ground and data/clock lines in a 4wire set - really saves hassle and is very cheap.

Next step is to get a display running with the metro, hopefully that will be easy enough.
 
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