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Built-in Functions
Requires:
Examples:
Example
Files:
Also See:
Nothing
spi_write( data_out );
data_in = spi_read();
ex_spi.c
spi_read(), spi_data_is_in(), SPI Overview, spi_write_16(), spi_read_16()
spi_xfer( )
Syntax:
spi_xfer(data)
spi_xfer(stream, data)
spi_xfer(stream, data, bits)
result = spi_xfer(data)
result = spi_xfer(stream, data)
result = spi_xfer(stream, data, bits)
Parameters: data is the variable or constant to transfer via SPI. The pin used to transfer data is
defined in the DO=pin option in #use spi. stream is the SPI stream to use as
defined in the STREAM=name option in #USE SPI.
bits is how many bits of data will be transferred.
Returns:
Function:
The data read in from the SPI. The pin used to transfer result is defined in the
DI=pin option in #USE SPI.
Transfers data to and reads data from an SPI device.
Availability: All devices with SPI support.
Requires:
Examples:
Example
Files:
Also See:
#USE SPI
int i = 34;
spi_xfer(i);
// transfers the number 34 via SPI
int trans = 34, res;
res = spi_xfer(trans);
// transfers the number 34 via SPI
// also reads the number coming in from SPI
None
#USE SPI
291
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