Difference between revisions of "RPI SPI8"
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* Set channel on GPIO_22 (A0), GPIO_27 (A1), GPIO_17 (A2) | * Set channel on GPIO_22 (A0), GPIO_27 (A1), GPIO_17 (A2) | ||
* Do SPI transfer | * Do SPI transfer | ||
| + | |||
| + | == Assembly Sheet == | ||
| + | |||
| + | [[RPI-SPI8 Assembly Sheet - Rev 1]] | ||
Revision as of 17:31, 18 June 2021
Contents
8-Channel SPI Bus Multiplexer for the Raspberry Pi
- 8 channels
- Supports SPI star topology
- MISO from all slaves are wired together
- Connects to the SPI pins on the Raspberry Pi
- SPIMISO -
- SPIMOSI -
- SPISCK -
- SPICE0 -
- Three GPIO pins select SPI channel
- GPIO_22 - A0
- GPIO_27 - A1
- GPIO_17 - A2
SPI Star Topology
From Practical EE: SPI Bus page:
In Star topology all the signals are split and routed to each slave in parallel, except chip select. Multiple chip select are used to select individual slave devices. More devices support this mode than daisy-chain.
Programming
- Set channel on GPIO_22 (A0), GPIO_27 (A1), GPIO_17 (A2)
- Do SPI transfer
