PCWHD IDE COMPILER Custom Computer Services Inc (CCS), PCWHD IDE COMPILER Datasheet - Page 345

• 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

COMMON QUESTIONS AND ANSWERS
How do I directly read/write to internal registers?
A hardware register may be mapped to a C variable to allow direct read and write capability to the
register. The following is an example using the TIMER0 register:
#BYTE timer 1 = 0x 100
timer0= 128; //set timer0 to 128
while (timer 1 ! = 200); // wait for timer0 to reach 200
Bits in registers may also be mapped as follows:
#BIT T 1 IF = 0x 84.3
.
.
.
while (!T 1 IF); //wait for timer0 interrupt
Registers may be indirectly addressed as shown in the following example:
printf ("enter address:");
a = gethex ();
printf
("\r\n value is %x\r\n", *a);
The compiler has a large set of built-in functions that will allow one to perform the most common
tasks with C function calls. When possible, it is best to use the built-in functions rather than directly
write to registers. Register locations change between chips and some register operations require a
specific algorithm to be performed when a register value is changed. The compiler also takes into
account known chip errata in the implementation of the built-in functions. For example, it is better to
do set_tris_ B (0); rather than *0x 02C6 =0;
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