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IstvanK

Why STATUS.C is 1 in this case? Why don't work this case? The C compiler does not guarantee the value of the CARRY bit after such a multiple shifting instructions, it can NOT be used. A workaround: you have to use asm instructions, and to create a loop a DECFSZ instruction, wich does not destroy th...

IstvanK

The microC Eeprom_Write library function first tests (and waits) whether the previous write process is complete (this can take up to 10 ms). Here is the point: it tests at startup (not after execution). Provide a delay of at least 20 ms (in practice 8 - 10 ms is also enough) between the last EEPROM_...

IstvanK

Try this:

Code: Select all

const short SimpleConstant[] = {0xAA} absolute 0x7F0;

For explanation look at the help of the Directive absolute's Note.

IstvanK

Code: Select all

char position;
char *res;

if (res = strchr(txt, 'E') // ie found
    position = res - txt;  // position is 5 in your case

IstvanK

An elegant (but not the shortest) solution:
PortBit = VarBit ? 1 : 0;
In your case:

Code: Select all

  count_led = 0b10000001;
  
  LATD.F3 = count_led.F0 ? 1 : 0;
  LATD.F2 = count_led.F1 ? 1 : 0;
  LATE.F5 = count_led.F6 ? 1 : 0;
  LATE.F4 = count_led.F7 ? 1 : 0;

IstvanK

IstvanK

Try this function (written by me, a long ago):

Code: Select all

char* RstrNcpy(char* dest, char* src, char n)  {
    char* retval = dest; 
    for ( ; n && (R0 = *src) ; *dest = R0, --n, ++src, ++dest);
    *dest = 0;
    return retval;
}

IstvanK

IstvanK

Hi Ditch;
This is possible only if the RTC is set to 12-hour mode AND the hours register's value is treated as a 24-hour BCD value (see datasheet).
Try to set your RTC to 24-hour mode: initialize bit 6 of the hours register (at address 0x02) to zero.

IstvanK

Hi jumper,

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const char *msg41="AT+CIPSTATUS\r\n ";

your msg41 is a pointer (stored in RAM so modifiable) to a string stored in Flash.

Use a const char array (a string) instead:

Code: Select all

const char msg41[] = "AT+CIPSTATUS\r\n ";

IstvanK

Hi Steve; Sometimes I encounter this problem too, but I already know that the IDE does not freeze (returns by pressing ESC), it just displays the "Search and Replace" window incorrectly, in a wrong, invisible place. So (if the IDE "freezes" after the Ctrl-R), you need to do the following: - press ES...

IstvanK

I think this is smaller and faster ... char buffer[3]; // to accomodate two digits and the zero (end) sign char i; // input value, 0 >= i <= 99 char tmp; // local var, R0 also can be used instead for ( tmp = '0' ; i > 9 ; ++tmp, i -= 10); buffer[0] = tmp; // i/10 buffer[1] = i + '0'; // i%10 buffer[...

IstvanK

On request I wrote a simple and fast function to display the temperature measured by the Ds3231 internal sensor. - no any floating operation (integer arithmetic only) - no any character buffer : each digit is displayed immediately, after it's computed. From the Ds3231 datasheet: Temperature is repre...

IstvanK

Hi keedo;
Based on your uploaded images, I think you tried to install the v7.20 on a virtual machine running XP, but as we know, this version is not compatible with the XP.
Look at this posts:
viewtopic.php?f=88&t=71710

IstvanK

Maybe a missing ANSEL? setting?
Study the datasheet.

IstvanK

Full function alarm clock using a DS1307: - (only) two-button treatment, 16x2 LCD with I2C 'backpack', blinking alarm LED - adjustable RTC time-date, the (abbreviated) name of the day too - settable alarm (status, hours and mins), stored also in RTC user ram - restore alarm settings at next power-on...

IstvanK

Hi cyril341; Make sure that if an EEPROM_Write () is followed by an EEPROM_Read (), there is enough time (10 ms) to finish the writing (before the reading). In your code it may be enough to put the delay before the last EEPROM_Read() .... at the end of the code: EEPROM_Write (0x88,count); // Invert ...

Search found 166 matches

Re: Problem logic Rotate right and PIC18F46K22

Re: Delay after eeprom read/write

Re: "const absolute" does not work

Re: Is this a bug or an (un)intentional mistake?

Re: How to assign port bits to the variable bits

Re: strncpy

Re: Matching Now Time With Time Read From A RTC

Re: How to corrupt a pointer to a string stored in flash?

Re: IDE Froze!

Re: Memory efficient Alternative To Sprintf

Ds3231 RTC: temperature display

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Re: unexpected results from example code

LCD Alarm Clock using a PIC12F629

Re: EEPROM and button as a counter

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