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Interface Accelerometer and SD card by spi with PIC18F2620

 
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Classic



Joined: 22 Aug 2011
Posts: 6
Location: Thailand

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Interface Accelerometer and SD card by spi with PIC18F2620
PostPosted: Wed Mar 14, 2012 11:05 pm     Reply with quote
I want to stored data from accelerometer into sd card with pic18f2620 but port spi in pic18f2620 not enough.Interface of accelerometer in circuit should be? If i want interface accelerometer and sd card with spi. Can you help me?

Code:
//    sd/mmc          pic18f2620
//      SDI             C5
//      SDO             C4
//      CLK             C3
//      CS              C2

//    mma7455L        pic18f2620
//      SDI             ??
//      SDO             ??
//      CLK             ??
//      CS              C0


mma7455L and pic18f2620 can operate in 3.3v
RoGuE_StreaK



Joined: 02 Feb 2010
Posts: 73

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PostPosted: Wed Mar 14, 2012 11:38 pm     Reply with quote
As I understand it, SDI, SDO, and CLK are shared, you only need a separate pin for each CS (chip select).

http://www.ccsinfo.com/forum/viewtopic.php?p=7154

http://en.wikipedia.org/wiki/Serial_Peripheral_Interface_Bus
temtronic



Joined: 01 Jul 2010
Posts: 9460
Location: Greensville,Ontario

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PostPosted: Thu Mar 15, 2012 4:50 am     Reply with quote
Please tell us where you saw you can run the PIC18F2620 at 3.3V !
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