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PSoC 5, 3 & 1

Anonymous
Not applicable

   

 Hi, I do not speak English very well, sorry :(.

I want that the display change when i press the button. I have got three menus for show in display. But when i press the buttom, the display dont change. I dont know where is the error.   

   

My program in C:

   

 

   

----------------------------------------------------------------------------------------------

   

   

#include <m8c.h>        

   

#include "PSoCAPI.h"    

   

#include "Stdlib.h"

   

#include "m8c.h"

   

#include "math.h"

   

 

   

int cadena;

   

float datos;

   

int t;

   

int menu;

   

int aux;

   

 

   

void main(void)

   

{

   

 

   

    M8C_EnableGInt;

   

PGA_Start(PGA_HIGHPOWER);

   

ADCINC_Start(ADCINC_HIGHPOWER);

   

ADCINC_GetSamples(0);

   

Character_LCD_Start();               

   

       

   

while(1)

   

    //infinite loop.

   

{

   

   

if(menu==3){

   

menu=0;

   

}

   

   

switch(menu){

   

case 0:

   

if (ADCINC_fIsDataAvailable() != 0){    

   

if ((ADCINC_bGetData() <= 255)&&(ADCINC_bGetData() >0)){

   

AMUX4_1_InputSelect(AMUX4_1_PORT0_7); 

   

                datos=(float)ADCINC_wGetData()*5/255;

   

a=datos*100;

   

datos=floor(a);

   

datos=datos/100;

   

Character_LCD_Init();                           

   

for(t=0;t<50;t++){

   

Character_LCD_Position(1,2);               

   

Character_LCD_PrString(ftoa(datos,&cadena));

   

Character_LCD_Position(1,6);

   

Character_LCD_PrCString("      ");

   

Character_LCD_Position(1,12);

   

Character_LCD_PrCString("V");

   

Character_LCD_Position(0,1);

   

Character_LCD_PrCString("Selector 1:");

   

}

   

ADCINC_fClearFlag();                            

   

}

   

}

   

break;

   

   

case 1:

   

for(t=0;t<50;t++){

   

Character_LCD_Position(0,1);

   

Character_LCD_PrCString("Temperatura");

   

Character_LCD_Position(1,1);

   

Character_LCD_PrCString("Temperatura de referencia:");

   

}

   

ADCINC_fClearFlag();

   

break;

   

   

case 2:

   

for(t=0;t<50;t++){

   

Character_LCD_Position(0,1);

   

Character_LCD_PrCString("Configuracion:");

   

}

   

ADCINC_fClearFlag(); 

   

break;

   

}

   

aux=PRT0DR&&0x01;

   

if(aux!=0&&x==0){

   

menu=menu++;

   

x=1;

   

}else if(aux==0&&x==1){

   

x=0;

   

}

   

if(menu==3)menu=0;

   

}

   

   

}

   
    ---------------------------------------------------------------------------------------------   
   
        
   
    I am trying things with psoc for a asignature of university.  The program is very simple but I'm learning to use PSoC.   
   
        
   
    Is the PSoC 1.   
   
        
   
    Thanks!   
   
        
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13 Replies
Anonymous
Not applicable

 Ah and the port 0[0] is configurated:

   

Globalinputeven, High Z and interruptions disabled.

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Bob_Marlowe
Expert II

Hi Clemen,

   

do not rely on a variable beeing initialized when you do not initialize it yourself.
You rely on menu equal to 0 (zero).

   

And it is better programmer's style to write

   

if (menu >= 3) menu = 0;

   

which in fact may help against some errors.

   

Have fun

   

Bob 

0 Likes
Bob_Marlowe
Expert II

... and I miss the #pragma ioport declaration (have a look into the c-language manual)

   

Bob

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Bob_Marlowe
Expert II

... and another one (too much code to understand quickly)
It looks like you are using a pushbutton on port0[0]. so what is the port like, when the button is not pushed? Floating??

   

I use very often resistive output high, write a one to it and then read and debounce the pushbutton.

   

Bob

0 Likes
Anonymous
Not applicable

Yes, you have to have debounce of the key first.

0 Likes
Anonymous
Not applicable

Here is the modification I do

   

 

   

  aux=PRT0DR&&0x01;

   

  if(aux == 1)
  {
   /* only do this if x is 0*/
   if (x == 0)
   {
 
    /* add a delay here */
    /* Here is a quick but ugly way to do it */
    /* Add declare of i at the beginning of the code */
    /* you may need to experiment with the delay_count number */
    
    for(i = 0; i <= DELAY_COUNT; i ++);
   
    aux = PRT0DR && 0x01;
    
    /* only if it is still pressed */
    if(aux == 1)
    {
    
     if (++menu >= 3)
     {
      menu = 0;
     }
 
     x = 1;
    }
   }
  }
  else
  {
   x = 0;
  }

0 Likes
Anonymous
Not applicable

Rather than using a crude for loop for debounce delay,since youre already using an LCD,use the delay functions that it provides.

   

use LCD_Delay50uTimes(BYTE bTimes); where bTimes is the number of times to delay 50 μSec.

   

This is a clock independent delay.
 

   

PS:Hit 'Verify Answer' if my reply helped you.

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Anonymous
Not applicable

yes,

   

it would be good to reuse the existing delay function.

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Anonymous
Not applicable

Hi again!

   

Thank you very much to all!

   

The psoc is in the lab, on wednesday i will go to the lab and test all 🙂

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Anonymous
Not applicable

Hi all,

   

I have configured P0[0] as input pin and I want check the input status of P0[0] using #pragma ioport directive.

   

#pragma ioport Key_Input 0x01; char Key_Input;

   

if (Key_Input == 1)

   

{

   

 /* Do something */

   

}

   

I want to know how do I guarantee that Im accessing P0[0]. The part number Im using is CY8C28452.

   

 

   

Thanks & Regards

   

Srinivas

0 Likes
Bob_Marlowe
Expert II

It would have been better to start a new thread to get help instead of using a three year old thread fom somebody else.

   

IOs are organized as ports of 8 bit width and are already declared as #pragma ioport. For each port there is a data register named PRTnDR where "n" is the port number. so to get P0[0] you may write

   

Key_Input = PRT0DR & 0x01; // Masking all bits except bit 0

   

To make the access easier you may define some macros as for instance

   

#define GetPortBit(Port,BitNo) (Port & /0x01 << BitNo))

   

and

   

#define Key_Input (GetPortBit(PRT0DR,0))

   

 

   

Bob

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ETRO_SSN583
Esteemed Contributor

If the input pin is a mechanical switch/contact then you need to debounce the

   

pins input. See attached possible methods.

   

 

   

Additionally if you do read modify writes to the port you will need to use Shadow

   

Register -

   

 

   

    

   

          

   

http://www.cypress.com/?rID=2900     AN2094

   

 

   

 

   

Regards, Dana.

0 Likes
Anonymous
Not applicable

Hi all,

   

Thanks for the reply.

   

I knew this approach, however I thought there could be some special keywords supported by compiler Image Craft to define bit variable pointing to particular pin of port. For ex sbit supported by keil.

   

However now I have realised that bit operations are the only way to perform read/write operation.

   

Thanks & Regards,

   

Srinivas

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