topic Re: Codewarrior Timer and converter in CodeWarrior for MCU

Codewarrior Timer and converter

Nicom — Tue, 09 May 2006 17:24:37 GMT

I want to use this fonction to change the frequence of the timer but

i can't because there are always error

How use this function ?

byte Timer_SetFreqHz(word Freq)

I have the same problem to the converter i want to stock the value in variable with that how do I do ?

byte AD1_GetValue16(word *Values)

help me please

thanks

Nico

Re: Codewarrior Timer and converter

J2MEJediMaster — Tue, 09 May 2006 19:46:44 GMT

A little more information, please. What's the target processor/platform? What version of CodeWarrior are you using?

---Tom

Re: Codewarrior Timer and converter

Nicom — Wed, 10 May 2006 14:59:04 GMT

Sorry, I use a MC9S08GT16

44 QFP

and I work with codewarrior 5.7

My problem is I don't now how use this fonction

Timer_SetFreqHz() ;

I want to change frequence with an input but i'm a newbee with codewarrior

Thanks

Nico

Re: Codewarrior Timer and converter

Nicom — Wed, 10 May 2006 18:31:27 GMT

I don't know how change a frequency of timer

i think that is with this function but I'm not sure

if there are people to explain me how do I make?

thanks

Nico

Sorry for my english which is bad !

Re: Codewarrior Timer and converter

J2MEJediMaster — Wed, 10 May 2006 22:19:28 GMT

Sorry, I'm have a tough time tracking down that function. Is there a document file that you're getting that from? This way we can both be on the same page and determine what the function is doing.

---Tom

Re: Codewarrior Timer and converter

ProcessorExpert — Thu, 11 May 2006 19:09:42 GMT

SetFreqHz - this method sets the new frequency of the output signal. The frequency is expressed in Hz as a 16-bit unsigned integer number. This method is only available when the runtime setting type 'from interval' is selected in the Timing Dialog box of the Runtime setting area.

ANSIC prototype: byte SetFreqHz(word Freq)
Freq:word - Frequency to set [in Hz]
Return value:byte - Error code, possible codes:
ERR_OK - OK
ERR_SPEED - This device does not work in the active speed mode
ERR_MATH - Overflow during evaluation
ERR_RANGE - Parameter out of range

For more info see help for selected bean, especially Typical Usage page.

Best Regard, Jan Pospisilik, Processor Expert Support

Re: Codewarrior Timer and converter

Nicom — Thu, 11 May 2006 21:43:24 GMT

thanks i have ever seen this text about the fonction ,

my problem is : Iwnt use this fonction to change the frequency of timer

After the frequency will be using by a LED to blinking frequency

int i=1;
extern word ADCValue;
byte err;

void main(void)
{

/*** Processor Expert internal initialization. DON'T REMOVE THIS CODE!!! ***/
PE_low_level_init();

while (i>0) {

       err=Timer_SetFreqHz(AD1_GetValue16(&ADCValue));
       LedOutput_NegVal();

            }

how use this fonction to change frequency ?

Re: Codewarrior Timer and converter

rocco — Thu, 11 May 2006 23:59:45 GMT

Hi, Nico:

The function Timer_SetFreqHz() requires a word parameter, but according to the prototype in your first post, the function AD1_GetValue16() returns a byte.

You could try a caste:

err=Timer_SetFreqHz( (word)AD1_GetValue16(&ADCValue) );

Re: Codewarrior Timer and converter

ProcessorExpert — Thu, 18 May 2006 20:48:02 GMT

err=Timer_SetFreqHz(AD1_GetValue16(&ADCValue)) isn't correctly, the GetVaule16 method returns error code, not measured value. Try to use e.g.:

err = AD1_GetValue16(&ADCValue); err = Timer_SetFreqHz(ADCValue);

The another incorrect thing is a location of "LedOutput_NegVal();", this command should be called from Timer event from event.c.

Best Regards,

Jan Pospisilik, Processor Expert Support