Output contents of OCR1A and OCR1B to terminal using USART

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ssyed_mcu
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Joined: Sat. Sep 29, 2007
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Location: Bangalore, India
#1
Posted by ssyed_mcu: Tue. Nov 27, 2012 - 11:42 AM
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Hi,

I would like to know if it is possible to display the contents of OCR1A to a terminal using serial communication once I have the functions usart_putstring(OCR1A) as shown below:


void usart_putstring(char *s)
{
    while(*s)
    {
       usart_putch(*s);
       s++;
    }
}

void usart_putch(char data)
{
    // Wait for empty transmit buffer
    while ( !(UCSRA & (_BV(UDRE))) );
    // Start transmission
    UDR = data; 
}

I want to do this so that I can see what are the min. and max. values of OCR1A while driving a servo.

Thanks,
Sumair

Tags:

AVR Microcontrollers, megaAVR and tinyAVR
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meslomp
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Joined: Wed. May 2, 2007
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Location: Nieuwegein, Netherlands
Posted by meslomp: Tue. Nov 27, 2012 - 11:48 AM
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if your terminal program can display hex values received you should be fine already.
if you use a ASCII terminal program, then first convert the hex value into 4 ASCII characters and send those through the UART.

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Gold Markclawson
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Location: (using avr-gcc in) Finchingfield, Essex, England
Posted by clawson: Tue. Nov 27, 2012 - 12:07 PM
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Quote:

usart_putstring(OCR1A)

Try something like:

char buff[10];
itoa(OCR1A, buff, 10);
usart_putstring(buf);

Note that itoa() is not a standard C function so your compiler may have a different interface or may not even supply itoa() at all.

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