Difference between revisions of "SPI"
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This page will summarize the informations to use the SPI bus on our boards. | This page will summarize the informations to use the SPI bus on our boards. | ||
Revision as of 17:49, 16 November 2009
Page under construction...
Informations on this page are not guaranteed !!
This page will summarize the informations to use the SPI bus on our boards.
Overview
SPI (Serial Peripheral Interface) is a 3-wire full-duplex serial bus. Wires used in SPI are :
- MOSI, Master Output Slave Input : send data to slave.
- MISO, Master Input Slave Output : receive data from slave.
- SCLK, : Serial Clock signal used to synchronise the transmission. (In imx27 (apf27) maximum frequency of SCLK is 22.167MHz in master mode and 16.625 in slave mode.
- SSx, Slave Select : used to select the slave for communication with master.
On APF27, the imx27 contains 3 SPI devices that can be configured in master or slave. APF9328 (imxL) contains 2 SPI.
Linux configuration
Linux user space C code
Tested SPI chips
Links
- SPI description on wikipedia.
