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HOPE RF12B module?

 
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HOPE RF12B module?
PostPosted: Sat Oct 17, 2009 2:32 pm     Reply with quote
Trying to use a HOPE RF12B module.

Is there some hints on setup the SPI communication?
bungee-



Joined: 27 Jun 2007
Posts: 206

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PostPosted: Sat Oct 17, 2009 4:25 pm     Reply with quote
Manufacturer: http://www.hoperf.com/rf_fsk/rfm12b.htm

I am struggling with this modules. Sadly I lost the good code due to HD crash. According to PDF from the manufacturer this should be good setup for SPI
Code:
setup_spi(SPI_MASTER|SPI_L_TO_H|SPI_XMIT_L_TO_H|SPI_CLK_DIV_4);

I'm using 8MHz internal oscillator in that particular case.

Also I found a German forum with CCS code, but it didn't work for me.
Here is the forum link: http://www.mikrocontroller.net/topic/73658
FvM



Joined: 27 Aug 2008
Posts: 2337
Location: Germany

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PostPosted: Sun Oct 18, 2009 1:51 am     Reply with quote
I'm not using the HopeRF modules, but I can confirm, that SPI Mode 0, as sel in your use_spi() statement is correct according to the manufacturer datasheet. Also SPI speed should no problem, because the chip works up to 20 MHz. So either a hardware problem or incorrect SPI command format should be expected.
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