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Built-in Functions
Requires:
Examples:
Example
Files:
Also See:
Nothing
data_in = spi_read(out_data);
ex_spi.c
spi_write(), , , spi_data_is_in(), SPI Overview
spi_read_16()
spi_read2_16()
spi_read3_16()
spi_read4_16()
Syntax:
value = spi_read_16([data]);
value = spi_read2_16([data]);
value = spi_read3_16([data]);
value = spi_read4_16([data]);
Parameters: data – optional parameter and if included is a 16 bit int
Returns:
Function:
A 16 bit int
Return a value read by the SPI. If a value is passed to the spi_read_16() the data
will be clocked out and the data received will be returned. If no data is ready,
spi_read_16() will wait for the data is a SLAVE or return the last DATA clocked in
from spi_write_16().
If this device is the MASTER then either do a spi_write_16(data) followed by a
spi_read_16() or do a spi_read_16(data). These both do the same thing and will
generate a clock. If there is no data to send just do a spi_read_16(0) to get the
clock.
If this device is a slave then either call spi_read_16() to wait for the clock and data
or use_spi_data_is_in() to determine if data is ready.
Availability: This function is only available on devices with SPI hardware.
Requires:
Examples:
Example
Files:
Also See:
NThat the option SPI_MODE_16B be used in setup_spi() function, or that the
option XFER16 be used in #use SPI(
data_in = spi_read_16(out_data);
None
spi_read(), spi_write(), spi_write_16(), spi_data_is_in(), SPI Overview
289
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