How to use Bluno beetle's SPI interface?

Leff 2015-08-04 14:51:45 9491 Views5 Replies

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the picture could be find on the Bluno beetle wiki page. And you could also find its pcb diagram on the product page and dig into it's pcd disign.

Unfortunately, I didn't find SPI's ss/cs pin which is for chip selecting. I guess this ICSP is for download sketch or uploading micro chip's firmware, so the ss/cs pin is alway ready for that purpose. Any way, you can find the ss/cs pin is D10 but was not connect with user's interface because there is no D10.

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But there's still other two method to make it:

1 So you have to solder the D10 separately. You have to be very careful to avoid burning the chip out or soldering the chip pin together.

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2 Generally speaking , the SS/CS pin could be defined by user, so you can reverse the sketch, and wire the ss/cs pin to D4.
e.g: the SD module:
Code: Select all
const int chipSelect = 4; //instead of ----> const int chipSelect = 10; //rest code not display // we'll use the initialization code from the utility libraries // since we're just testing if the card is working! if (!card.init(SPI_HALF_SPEED, chipSelect)) //rest code not display

Sorry I don't have a chance to try my idea, can anyone have a test?

Have a nice day!

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2018-08-06 04:56:29 DId anyone figure out if it was possible to program the Bluno Beetle's ICSP/SPI interface to another pin rather than D10 for CS/SS? conrad.addo

2015-10-23 17:24:52 SS pin is needed for SD card or the empty pin would not be stable 0/1 sometimes. You can use other digital pins instead.

cappellotto andrea wrote:i'm not sure that you need SS pin. it should be low when you use sd card but i think it's always low

Leff

2015-10-23 15:22:17 i'm not sure that you need SS pin. it should be low when you use sd card but i think it's always low cappellotto andrea

2015-10-21 15:39:37

cappellotto andrea wrote:hi leff,
I'm interested in use spi interface for sd card.. did you test it?? hope it works

Hello Cappellotto?

Welcome!

Sorry I don't remember why I writed the post before, it should work. I don't have beetle or SD module at my hand now, would you like to have a test and share it?

Leff Leff

2015-10-21 01:05:56 hi leff,
I'm interested in use spi interface for sd card.. did you test it?? hope it works

cappellotto andrea