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Problem with the timer: MCB4300

Max K over 10 years ago

Hello,

I have a problem with my timer. The program works as specified below. But I want, that the ADC value converted into a float and then output on the display.

If I write

 sprintf(StringBuf, "ADC0: %.2f", (float)adcVal[0]);

or this

  float x;

x = ADC_GetValue();
sprintf(StringBuf, "ADC0: %.2f", x);

my timer doesn't works. But I don't know, why?

And another problem is, I defined the timerDelay = 10.000 ms. This means that my timer restart every 10 seconds, but why can I see every second a new value of the adc converter on the display? Normally it must show me a value every 10 seconds?

I hope anyone can help me.

 SOURCE-CODE which works without problems:
#include "LPC43xx.h"
#include "Board_ADC.h"
#include "Board_GLCD.h"
#include "GLCD_Config.h"
#include <cmsis_os.h>
#include <stdio.h>

#define STRINGBUF_LEN 21

extern GLCD_FONT GLCD_Font_16x24;
char StringBuf[STRINGBUF_LEN];

void Timer_Callback (void const *arg);
osTimerDef (Timer, Timer_Callback);
osTimerId TimerId;

uint32_t exec;
uint32_t timerDelay;
uint32_t cnt=0;


void Timer_Callback (void const *arg) {

        int adcVal[3];

        ADC_Initialize();
        ADC_StartConversion();
        while(ADC_ConversionDone() < 0);
        adcVal[0] = ADC_GetValue();
        adcVal[0] = (adcVal[0] * 10) / 1024;
        sprintf(StringBuf, "ADC0: %d", adcVal[0]);
        GLCD_SetForegroundColor (GLCD_COLOR_BLACK);
        GLCD_DrawString         (0, 2*24, (char*)StringBuf);

        ...
        ...
        ...
}


int main(void)
{
        exec = 2;
        TimerId = osTimerCreate (osTimer(Timer), osTimerPeriodic, &exec);

  if (TimerId != NULL) {
                timerDelay = 10000;
    osTimerStart (TimerId, timerDelay);
        }

        GLCD_Initialize();

        GLCD_SetBackgroundColor (GLCD_COLOR_BLUE);
  GLCD_SetForegroundColor (GLCD_COLOR_WHITE);
  GLCD_SetFont            (&GLCD_Font_16x24);
  GLCD_DrawString         (0, 0*24, "     ADC Value      ");
  GLCD_DrawString         (0, 1*24, "                    ");
  GLCD_SetBackgroundColor (GLCD_COLOR_WHITE);
  GLCD_SetForegroundColor (GLCD_COLOR_BLUE);
  GLCD_DrawString         (0, 2*24, "                    ");
        GLCD_DrawString         (0, 3*24, "                    ");
        GLCD_DrawString         (0, 4*24, "                    ");
        GLCD_DrawString         (0, 5*24, "                    ");
        GLCD_DrawString         (0, 6*24, "                    ");
        GLCD_DrawString         (0, 7*24, "                    ");
        GLCD_DrawString         (0, 8*24, "                    ");
        GLCD_DrawString         (0, 9*24, "                    ");
}