Arduino SPI interface as USBasp programmation and Wifi usable

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1

Hi,

does SPI interface could be used for USBASP programmation and also be able to communicate with a IC, like a WiFi Microchip IC?

If I'm right I can program my sketch with a USBASP programmer. After I have programmed it, could arduino use the SPI interface?

Thank you.

2

If I understand clearly, you want to program Arduino via ISP with USBasp programmer, then of course it works and after upload you could use SPI.

3

The arduino can communicate with SPI devices - no matter how you program it.

When programming by ISP/SPI and there are other things on those pins, you need to keep a few things in mind:

  • Nothing on any of the SPI pins should have anything that draws much current from the pin itself, like LEDs and stuff.
  • Since you're powering the device off the USBASP when programming it, make sure that, while it's being programmed, none of the connected devices are trying to draw a bunch of current.
  • Everything else on the SPI bus must use a CS pin (otherwise it'll think you're talking to it when you try to program the chip... and try to answer).