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PSoC 5, 3 & 1 MCU

Anonymous
Not applicable

 hi, m very new to this and i guess this sounds rather basic, but i really need help..

   

in my project i have just a pwm block that is used to activate the LED. It seems the pwm is executing just one cycle and then there is no change. LED remains off initially, goes on and then remains in the same state. the code:

   

#include <m8c.h>        // part specific constants and macros

   

#include "PSoCAPI.h"    // PSoC API definitions for all User Modules

   

#include  "PWM8.h"

   

int val;

   

void GenerateOneThirdDutyCycle(void)

   

{

   

    /* set period to eight clocks */

   

    PWM8_WritePeriod(23);

   

 

   

    /* set pulse width to generate a 33% duty cycle */

   

    PWM8_WritePulseWidth(7);

   

 

   

    /* ensure interrupt is disabled */

   

    PWM8_DisableInt();

   

 

   

    /* start the PWM8! */

   

    PWM8_Start();

   

}

   

 

   

void main(void)

   

{

   

void GenerateOneThirdDutyCycle(void);

   

M8C_EnableGInt ; // Uncomment this line to enable Global Interrupts

   

// Insert your main routine code here.

   

   

/* function prototype */

   

 

   

/* Divide by eight function */

   

for(;;)

   

{

   

GenerateOneThirdDutyCycle();

   

}

   

}

   

I tried the same with global interrupts disabled as well.. got the same result.. please help..

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9 Replies
Anonymous
Not applicable
        Hey your code "M8C_EnableGInt " is odd. Is this PSoC1? PSoC1 and others will have different answer. Would you please bundle your project.   
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Anonymous
Not applicable
        IF PSoC1 You need PWM8_Stop(); at top of GenerateOneThirdDutyCycle(void);   
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ETRO_SSN583
Esteemed Contributor

Suggest the following -

   

1) Move "void GenerateOneThirdDutyCycle(void);" before your code for this

   

function. I am sure it compiled correctly as you did not state it errored, but

   

normally a f() proto needs to occur first when scanned by compiler.

   

 

   

2) Your code shows an infinite loop calling GenerateOneThirdDutyCycle(),

   

so PWM always being set to same parameters, and you are turning off

   

interrupts, so what is the point of having an interrupt ?

   

 

   

3) I do not see any pragma for a C interrupt, so conclude you are doinjg a ASM

   

based interrupt. Therefore you would have modified the PWM8INT.asm file....?

   

 

   

4) What did you want an interruot to do ?

   

 

   

5) Next ime post entire project if you can, easier to see what you are doing,

   

settings, etc..

   

 

   

6) This post belongs in the PSOC 1 forum. "File", "Create Workspace Bundle", and

   

post.

   

 

   

Regards, Dana.

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Anonymous
Not applicable

 thank you.. will do.. but i didnt understand the point about pragma in c? wat does that mean?

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Anonymous
Not applicable

 Which you can't understand? When you would do expain the point, you coild get a answer.  ---- 

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Anonymous
Not applicable

 Hey PSoCkers! What was happen? Cypress got a progress!

   

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Anonymous
Not applicable
        Oh! It's occasionally appear and disappeared. How to use it?   
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ETRO_SSN583
Esteemed Contributor

My reference to pragma for C interrupts was PSOC 1 by mistake, GNU,

   

as you probably know, quite different. Ignore my past comment, my

   

mistake.

   

 

   

Regards, Dana.

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Anonymous
Not applicable

coild-->could 

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