Probably someone else can be more definitive, but here's a quick start:
Reload - The PIC is reprogrammed with a compiled hex file. To change the=20
programming.

Run - Several possibilities
1: Program execution starting at memory location 0000.
2: In Debug mode, if breakpoints have been inserted, the execution has=20
temporarily stopped at the break point, and can be continued at the next=20
instruction.
3:In Debug it may be possible to move the program pointer to 0000.

On 3/12/2011 9:58 AM, Jan-Erik Soderholm wrote:
> What is "reload program" ?
> Reset ? Re-flash ?
>
> What is "RUN" ?
>
>
>
>
> rchadwic wrote 2011-03-12 15:41:
>   =20
>> I am trying to learn how to use the C18  V3 . 36  compiler to program an
>> 18F4550. Using PicKit3 and MPLab  V8 . 46 .
>> I am trying to use the hardware USART functions to load a single charact=
er
>> into the PIC and echo it back, repeating the character 30 times in a WHI=
LE
>> loop.
>> The program is shown below. I am trying to declare constant hwi =3D 30. =
I have
>> tried many ways of locating this, none are successful.
>> With the statement located at POSITION A, it does the WHILE loop once; t=
o
>> repeat requires reloading the program. I am expecting the program to rep=
eat
>> each time I push RUN; it doesn't.
>> With the statement located at POSITION B, I get an  OUT OF RANGE  indica=
tion
>> on the Watch window. A count of 30 was expected. Repeat requires reloadi=
ng
>> the program.
>> With the statement located at POSITION C, it will not compile and I get =
a
>> syntax error that has not responded to typing error checks, research, an=
d
>> checks of the preceding line of code.
>> The MPLAB supplied usart . c routine complies and runs correctly.
>> I am doing something stupid that I cannot see. Can someone help me?
>>
>> My first thought regarding asking for help was the Microchip C18 forum.
>> However, I can not post this to that forum as I keep getting a message t=
hat
>> tells me I am using
>> "potentially harmful characters" A query to the forum yielded some
>> suggestions but no matter how I parse the post it fails.
>>
>> /**********************************************************************
>> /*This program loads an ascii "W" character into the PIC and repeats it =
30
>> times. */
>> /*uses A CHARACTER*/
>> /* ADDITIONAL NOTES:
>> /* Code uses the Peripheral support library available with MCC18 Compile=
r
>> /* Code Tested on:
>> /* Olimex demo board with 18F4550 processor
>> /* The microcontroller uses an External Crystal (20 MHz).
>> /*
>> /* Uses TX pin for transmission and RX pin for reception.
>> /* Baud rate of 9600 is configured for 20MHz oscillator frequency
>> //**********************************************************************=
/
>>
>> #define USE_OR_MASKS
>> #include<p18f4550.h>
>> #include<usart.h>
>> #include<delays.h>
>> //-------------------------------Configuration setting
>> ----------------------------------------------
>>
>> #pragma config FOSC=3D HS, PLLDIV =3D 5, FCMEN=3DON, WDT=3DOFF, IESO=3DO=
FF, XINST=3DOFF,
>> LVP=3DOFF
>>
>>
>> char Txdata =3D 'W';
>> int hwi=3D30;	//POSITION A	Loads OK, counts down and stops at 0 in
>> location 06B. Must //reload program to start again.
>>
>> #define BAUD_RATE_GEN 31      // Fosc =3D 20 MHz, Baud Rate =3D 9600 bps
>>
>> void main(void)
>> {
>>
>> //int hwi=3D30;	 //POSITION B "Out of Scope" value shows on Watch window=
;
>> counts loops 30 //times and stops at 0 at address 201.Must reload progra=
m to
>> start again.
>>
>>       OpenUSART(USART_TX_INT_OFF | USART_RX_INT_OFF | USART_ASYNCH_MODE =
|
>> USART_EIGHT_BIT | USART_CONT_RX | USART_BRGH_LOW, BAUD_RATE_GEN);
>>       baudUSART(BAUD_8_BIT_RATE | BAUD_AUTO_OFF);
>>
>>
>> //int hwi =3D 30;		//POSITION C  Syntax Error that responds to nothing
>> I change (yet)=09
>>
>> while(hwi>0)
>> =09
>> {
>>    	WriteUSART(Txdata);     // transmit the character
>> 	Delay10KTCYx (0);		//Delay about half a second
>> 	hwi--;
>>    }
>>
>> CloseUSART();
>> while (1);					// end of program
>>
>> }
>>
>>
>>
>>     =20
--=20
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