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StuartsProjects / SX12XX-LoRa

Library for SX12XX LoRa devices
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SPI interface error trying to initialize camera #51

Closed johncblacker closed 2 years ago

johncblacker commented 2 years ago

I'm using the Arducam Mini Module 2mp plus connected to Arduino DUE. I also have an rfm9x from Adafruit and an generic SDcard adaptor connected via SPI. When the program started, I get the card detected message, then when it tried to setup the OV2640 camera module I get repeated SPI interface errors. I have put the camera by itself connected to an arduino uno via spi and used the example code from Arducam repository and it works...so I know the cam is OK. But when I move it over to the DUE I get the SPI interface errors. I've checked my wiring numerous times and have tried powering the camera with 3.3v and 5v but I still get the error. Might you have any ideas on how I can trouble shoot this? From your code it appears you're running the SDcard, camera and LoRa modules on the same SPI bus as am I. I don't know what to do at this point to troubleshoot and/or fix the problem.

StuartsProjects commented 2 years ago

Most 'generic' SDcard adapters are not designed to be used with other devices on the SPI bus, they are also designed for 5v logic, whereas the DUE is 3.3V logic.

For a DUE you just need a bare bones SD card holder, the type with no regulator and logic level conversion circuits.

johncblacker commented 2 years ago

Thanks. I'll remove the SD card adapter and see where that takes me...Do you have a suggestion on a "bare bones sd card holder?" (Amazon link?). Thanks again.

johncblacker commented 2 years ago

I've found the adafruit sd card breakout "ADA254" that uses 3.3v logic. I'll give it a try.

StuartsProjects commented 2 years ago

Do a search on eBay\Amazon for 'sd card breakout'

You want a board that is basically just the connector, adapters that have an IC and a regulator, may not work.

johncblacker commented 2 years ago

OK, thanks. Switched over to a MKRZERO board with onboard SD and made some progress. Closing this issue, but please see my other new issue.

johncblacker commented 2 years ago

Closing awaiting sd card breakout.