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jtemples

ihave tested many codes for external interrupt.. That's progress. i want only one external interrupt on aany pin of port A. but didnt worked. Maybe that's because it may not be possible? Cn someone please post a simplest code for external interrupt on port A? Thanks Look into the datasheet on "exte...

jtemples

what could be the problem...?

Your code is wrong.

jtemples

what is the reason?

The code is wrong, in multiple places.

For example:

Code: Select all

    rows[j] = rows[j] >> 1;

After the initial run, what do you think will be in rows[]?

jtemples

Is it possible ?

Yes.

How do I modify the programme ? Help me, because i am not familiar with programming using MikroC compiler.

You can start reading the mikroe book on its compilers / c language. It is a great starting point.

jtemples

atntias wrote:how do you explain the behavior then?

Sure.

shuold i post the whole code?
-atntias

No need to. We already know why.

jtemples

Read the datasheet and disable any other functions on that pin.

jtemples

is there a limitaion on using a global array from inturrpts?

No.

jtemples

ok...complete information ... ;) code starts with do...while loop and checks for uart data ready signal OR PIR1.RCIF signal...when it goes high, it will execute the program inside it...the main problem is that my code strucks at RCIF signal...it keeps on waiting for that signal...in the mean while,...

jtemples

You can test the uart flag and then execute the corresponding code; or you can use the uart interrupt.

jtemples

That looks more like it, though I would simply return (msb << 8) | lsb; 1) you should check to see if the mcu is sending out the right pulses - scope or logic analyzer. 2) you should also check to see if the controller is performing adc correctly: apply a known voltage to the adc input pins for exam...

jtemples

Having read the datasheet, I can say with a high degree of confidence that your code is not even remotely close to workable.

If you want to code to that chip, read its datasheet.

jtemples

You can try - that's part of the fun.

In generally, you want them all to be connected to power / ground, respectively. Having said that, I have yet to find a pic where you have to connect them all to get it to work.

jtemples

In the main loop, after you obtain the results from reading ads7843, manually assigned a number to variable "result" and see if your code will transmit that number correctly. This allows you to know if the problem is with the usart part or with the ads7843 reading part. If the issue is with the ads7...

jtemples

The next stage is to wrap the LCDx_() functions. ... #define Lcdx_Init(lcdx) do {LCDx_Select(lcdx); Lcd_Init(); LCDx_Deselect(lcdx);} while (0) #define Lcdx_Cmd(lcdx, cmd) do {LCDx_Select(lcdx); Lcd_Cmd(cmd); LCDx_Deselect(lcdx);} while (0) #define Lcdx_Out(lcdx, x, y, str) do {LCDx_Select(lcdx); Lc...

jtemples

I will give you two. #define LCDx_Select(lcdx) lcdx = 1 //select lcdx #define LCDx_Deselect(lcdx) lcdx = 0 //deselect lcdx // talk to each LCD and display text on each //LCD_1_select(); LCDx_Select(LCDx_1); //select lcd1 LCD_Init(); Lcd_Cmd(_LCD_CLEAR); // Clear display Lcd_Cmd(_LCD_CURSOR_OFF); // ...

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