[Moved] LPC2138 PWM to control servo motor

[kodi.sudar]

You get a blank result even after using

angle= 123.4567;

What is the content of buffer array when you reach the lcdputs line?

PFA content OF BUFFER ARRAY

- - - Updated - - -

You get a blank result even after using

angle= 123.4567;

What is the content of buffer array when you reach the lcdputs line?

PFA content OF BUFFER ARRAY

 

[alexan_e]

This can't be the result of

angle= 123.4567;   // add this before sprintf to see if you get output
sprintf (buffer, " adc %0.4f", angle);

The value is different and the adc letters are missing from the array

 

[kodi.sudar]

This can't be the result of

angle= 123.4567;   // add this before sprintf to see if you get output
sprintf (buffer, " adc %0.4f", angle);

The value is different and the adc letters are missing from the array

no i changed the code value is correct i assigned as

                              angle =1.2356;
					sprintf (buffer, " %0.4f", angle);
					lcdputs(buffer);

 

[alexan_e]

The sprintf conversion is correct so I can only blame the LCD functions, I have no idea why it works in some cases and not in others

 

[kodi.sudar]

The sprintf conversion is correct so I can only blame the LCD functions, I have no idea why it works in some cases and not in others

But lcd function works for some cases it display %d, %x ..... But if I use %f lcd just blinks. ... Whether the value has to converted to any other form ?

 

[alexan_e]

This is not related to the sprintf operation, sprintf converts the float value and the array content becomes " 1.2356" , it the LCD function that for some reason can't show this.
Unless sprintf usage affects the operation of the code and messes it up, I'm not sure how.

 

[kodi.sudar]

This is not related to the sprintf operation, sprintf converts the float value and the array content becomes " 1.2356" , it the LCD function that for some reason can't show this.
Unless sprintf usage affects the operation of the code and messes it up, I'm not sure how.

any changes to be made in lcd function ?

 

[alexan_e]

Can't help you with that.
My suggestion is either to search for a LCD library for your device or get one for AVR or PIC and modify it.

 

[kodi.sudar]

Can't help you with that.
My suggestion is either to search for a LCD library for your device or get one for AVR or PIC and modify it.

ok let me google it. mean while if you find any any sort of material for that ,post the link.

thanks

 

[alexan_e]

In https://www.olimex.com/Products/ARM/NXP/LPC-MT-2138/ check the lcd drive (right lower corner), there is a lcd.c and lcd.h in the zip maybe they need a couple of modifications but it is for a similar device (LPC2138)

 

[kodi.sudar]

In https://www.olimex.com/Products/ARM/NXP/LPC-MT-2138/ check the lcd drive (right lower corner), there is a lcd.c and lcd.h in the zip maybe they need a couple of modifications but it is for a similar device (LPC2138)

I checked the above link and tried it ,but still it is unclear .