62 lines
1.8 KiB
ReStructuredText
62 lines
1.8 KiB
ReStructuredText
SPI Slave DMA
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=============
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In this application example SPI master transfer "Hello World!" message using DMA
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channel 0 to slave. SPI Slave will receive data using DMA channel 3 and store in
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the rx_buffer. SPI slave will send again received message back to master using
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DMA channel 2. SPI master will receive message using DMA channel 1
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Supported evaluation kit
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------------------------
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- `ATSAME54-XPRO <http://www.microchip.com/Developmenttools/ProductDetails.aspx?PartNO=ATSAME54-XPRO>`_
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Drivers and Middleware
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----------------------
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* DMA SPI MASTER
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* Synchronous SPI Slave
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* DMA
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* STDIO Redirect
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Interface settings
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------------------
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- USART
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- No parity
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- 8-bit character size
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- 1 stop bit
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- 9600 baud-rate
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- SPI MASTER
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- Mode 0
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- 8-bit character size
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- MSB First
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- 1000000 baud-rate
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- SPI Slave
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- Mode 0
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- 8-bit character size
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- MSB First
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- DMA
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- DMA Channel 0 - SPI Master TX
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- DMA Channel 1 - SPI Master RX
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- DMA Channel 2 - SPI Slave TX
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- DMA Channel 3 - SPI Slave RX
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Hardware Connection
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-------------------
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======================= ======================
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SPI Master(SERCOM4) SPI Slave(SERCOM6)
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======================= ======================
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PB27 **(MOSI)** PC04 **(MOSI)**
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PB26 **(SCK)** PC05 **(SCK)**
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PB29 **(MISO)** PC07 **(MISO)**
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PB28 **(CS)** PC06 **(CS)**
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======================= ======================
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Running the demo
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----------------
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#. Press Download Pack and save the .atzip file
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#. Import .atzip file into Atmel Studio 7, File->Import->Atmel Start Project.
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#. Build and flash into supported evaluation board
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#. Open the serial port in Atmel Data Visualizer or any serial port monitor.
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#. Press the Reset button.
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#. You should see the **Hello World!** message on console received by SPI slave and SPI master |