CCS C Compiler Manual PCB / PCM / PCH

Functional Overview
Writes N bytes to address from pointer
Relevant Preprocessor:
#ROM address={list}
write_eeprom = noint
Relevant Interrupts:
INT_EEPROM
Can also be used to put data EEPROM memory data into the
hex file.
Allows interrupts to occur while the write_eeprom() operations
is polling the done bit to check if the write operations has
completed. Can be used as long as no EEPROM operations
are performed during an ISR.
Interrupt fires when EEPROM write is complete
Relevant Include Files:
None, all functions built-in
Relevant getenv() parameters:
DATA_EEPROM
Example Code:
For 18F452
#rom 0xf00000={1,2,3,4,5}
Size of data EEPROM memory.
//inserts this data into the hex file. The data eeprom address
//differs for different family of chips. Please refer to the
//programming specs to find the right value for the device
write_eeprom(0x0,0x12); //writes 0x12 to data eeprom location 0
value=read_eeprom(0x0); //reads data eeprom location 0x0 returns 0x12
#ROM 0x007FFC00={1,2,3,4,5} // Inserts this data into the hex file
// The data EEPROM address differs between PICs
// Please refer to the device editor for device specific values.
write_eeprom(0x10, 0x1337); // Writes 0x1337 to data EEPROM location 10.
value=read_eeprom(0x0); // Reads data EEPROM location 10 returns 0x1337.
Data Signal Modulator
The Data Signal Modulator (DSM) allows the user to mix a digital data stream (the “modulator
signal”) with a carrier signal to produce a modulated output. Both the carrier and the modulator
signals are supplied to the DSM module, either internally from the output of a peripheral, or
externally through an input pin. The modulated output signal is generated by performing a
logical AND operation of both the carrier and modulator signals and then it is provided to the
MDOUT pin. Using this method, the DSM can generate the following types of key modulation
schemes:
Frequency Shift Keying (FSK)
Phase Shift Keying (PSK)
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