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SPI and MAX7221 and DS1306

 
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The Puma



Joined: 23 Apr 2004
Posts: 227
Location: The Netherlands

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SPI and MAX7221 and DS1306
PostPosted: Sun Sep 09, 2007 4:49 am     Reply with quote
I want to display on a dot matrix display board (constructed with ten max7221's) the time (constructed with a ds1306)

My question is now:
The max7221 use
setup_spi(SPI_MASTER | SPI_H_TO_L | SPI_CLK_DIV_16);

The ds1306 use
setup_spi(SPI_MASTER | SPI_L_TO_H | SPI_CLK_DIV_16);

How to get this to work on a single spi bus??
ckielstra



Joined: 18 Mar 2004
Posts: 3680
Location: The Netherlands

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PostPosted: Sun Sep 09, 2007 7:33 am     Reply with quote
Easy. You can only send to one device at a time, so when you switch from one device to the other you call the setup_spi() function for your new device.
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