en:netzer:spi-master

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en:netzer:spi-master [2015/12/23 17:22] – [Firmware pro version] Added single slave example sveschen:netzer:spi-master [2025/06/11 20:42] (current) – external edit 127.0.0.1
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 For using this SPI master in a single slave environment this example is provided here. For using this SPI master in a single slave environment this example is provided here.
 We assume that the slave is connected with the SPI_CS wire like shown below. We assume that the slave is connected with the SPI_CS wire like shown below.
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 +{{:en:netzer:spi_master_connection.gif|}}
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 The SPI_CS shall be low active - a low level selects the slave. The SPI_CS shall be low active - a low level selects the slave.
 +The pull up resistor at CS is needed to prevent false selection.
 +This may occur on power up if CS is not driven by Netzer.
 +The pull up resistor at SPI_MI is needed to prevent floating in case the slave is not selected and therefore the pin is not driven.
 +
 The data string <code>01 23 45 67 89</code> shall be sent to the SPI slave. The data string <code>01 23 45 67 89</code> shall be sent to the SPI slave.