PCWHD IDE COMPILER Custom Computer Services Inc (CCS), PCWHD IDE COMPILER Datasheet - Page 75

• Manufacturer Part Number: PCWHD IDE COMPILER
• Description: PCWHD PIC10,16,18,24, DSPIC
• Manufacturer: Custom Computer Services Inc (CCS)
• Type: Compilerr

Specifications of PCWHD IDE COMPILER

• For Use With/related Products: Microchip PIC10, PIC12, PIC16, PIC18, PIC24, dsPIC MCUs
• Lead Free Status / RoHS Status: Not applicable / Not applicable
• Other names: 429-1009

Relevant Interrupts :
None
Relevant Include Files:
None, all functions built-in
Relevant getenv() parameters:
None
Example Code:
int16 data = 0x0C32;
write_configuration_memory
(&data, 2);
CRC
The programmable Cyclic Redundancy Check (CRC) in the PIC24F is a software configurable CRC
checksum generator. (Other members of the PCD family do not have this peripheral at the time of
writing this manual). The checksum is a unique number associated with a message or a block of
data containing several bytes. The built-in CRC module has the following features:
Relevant Functions:
setup_crc (polynomial)
crc_init (data)
crc_calc (data)
Relevant Preprocessor:
None
Relevant Interrupts :
#INT_CRC
Relevant Include Files:
None, all functions built-in
Relevant getenv() parameters:
None
Example Code:
Int16 data[8];
int16 result;
setup_adc(15, 3, 1);
crc_init(0xFEEE);
Result =
crc_calc(&data[0], 8);
· Programmable bit length for the CRC generator polynomial. (up to 16 bit length)
· Programmable CRC generator polynomial.
· Interrupt output.
· 8-deep, 16-bit or 16-deep, 8-bit FIFO for data input.
// CRC Polynomial is X16 + X15 + X3 + X1+ 1 or Polynomial = 8005h
Starts the CRC accumulator out at 0xFEEE
Calculate the CRC
This will setup the CRC polynomial.
Sets the initial value used by the CRC module.
Returns the calculated CRC value.
On completion of CRC calculation.
//writes 2 bytes to the configuration memory
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