CCS C Compiler Manual PCB / PCM / PCH

Functional Overview
configure the second interface.
spi_data_is_in()
spi_data_is_in2()
spi_write(value)
spi_write2(value)
spi_read(value)
spi_read2(value)
Returns TRUE if the SPI receive buffer has a byte of data.
Transmits the value over the SPI interface. This will cause the
data to be clocked out on the SDO pin.
Performs an SPI transaction, where the value is clocked out on
the SDO pin and data clocked in on the SDI pin is returned. If
you just want to clock in data then you can use spi_read() without
a parameter.
Relevant Preprocessor:
None
Relevant Interrupts:
#int_ssp
#int_ssp2
Transaction (read or write) has completed on the indicated
peripheral.
Relevant getenv() Parameters:
SPI
Returns TRUE if the device has an SPI peripheral
Example Code:
//configure the device to be a master, data transmitted on H-to-L clock transition
setup_spi(SPI_MASTER | SPI_H_TO_L | SPI_CLK_DIV_16);
spi_write(0x80);
value=spi_read();
value=spi_read(0x80);
//write 0x80 to SPI device
//read a value from the SPI device
//write 0x80 to SPI device the same time you are reading a value.
Timer0
These options lets the user configure and use timer0. It is available on all devices and is always
enabled. The clock/counter is 8-bit on pic16s and 8 or 16 bit on pic18s. It counts up and also
provides interrupt on overflow. The options available differ and are listed in the device header
file.
Relevant Functions:
setup_timer_0(mode)
set_timer0(value) or
set_rtcc(value)
Sets the source, prescale etc for timer0
Initializes the timer0 clock/counter. Value may be a 8 bit or 16
bit depending on the device.
69