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Sending string on serial port

Michal Selinger

Hi everyone,

is there anyone who could help me with following?

In x51 processor You have SBUF buffer which is used to send or receive a character via serial port.
Is there any way to send a string? Not only a single character, but whole string?
I thought there could be any library which deals with it.
Or do I have to write it myself? I'm using Keil of course.

Would You be so kind and help?

Parents
  • 0 in reply to Christoph Franck

    I've got a problem.

    static void Nastav_seriovy_kanal (void)
{
	SCON = 0x50;
	TMOD = TMOD | 0x20;
	TH1 = 0xF4;
	TL1 = 0xF4;
	ES = 1;
	TR1 = 1;
}

static void Preruseni_seriovy_kanal (void) interrupt 4
{
	if (RI == 1)
	{
	    RI = 0;
	    if(SBUF == 'A') putchar('Q');
	}
	if (TI == 1) TI = 0;
}

    I'm also including stdio.h, and string.h.

    I wonder why it doesn't work.

Reply
  • 0 in reply to Christoph Franck

    I've got a problem.

    static void Nastav_seriovy_kanal (void)
{
	SCON = 0x50;
	TMOD = TMOD | 0x20;
	TH1 = 0xF4;
	TL1 = 0xF4;
	ES = 1;
	TR1 = 1;
}

static void Preruseni_seriovy_kanal (void) interrupt 4
{
	if (RI == 1)
	{
	    RI = 0;
	    if(SBUF == 'A') putchar('Q');
	}
	if (TI == 1) TI = 0;
}

    I'm also including stdio.h, and string.h.

    I wonder why it doesn't work.

Children
  • 0 in reply to Michal Selinger

    ATMEGA32:

    //-------------------------------------------------------------------------------
// Zinicializuje UART
void Serial_Init()
{
    // Set baud rate
    UBRRH = 0;
    UBRRL = 71;								// 9600baud @ 11.0592MHz

	UCSRB=(1<<RXCIE)|(1<<RXEN)|(1<<TXEN);	// povolim RX, TX a preruseni od RX

	UCSRC=(1<<URSEL)|(3<<UCSZ0);			// D=8, P=0, S=1
}


//---------------------------------------------------------------------------------
// signal handler for receive complete interrupt
SIGNAL(SIG_UART_RECV){
char aku;
int temp, h, l;


	aku=UDR;
...
}


//---------------------------------------------------------------------------------------------
void PutStr(char *p){	// Posle string
	while (*p) {
		PutChar (*p++);
	}
}

  • 0 in reply to Mirek Fiala

    "ATMEGA32"

    Why are you posting AVR code for a non-Keil compiler??

    That's almost entirely irrelevant, since issues related to Port IO and interrupts a almost entirely target- and compiler-specific!

    Keil does not have a SIGNAL macro or keyword - and it's deprecated in AVR-GCC anyhow!

  • 0 in reply to Andy Neil

    I think the SIGNAL is a debugger thing,
    for generating code that runs to simulate
    event for the controller.

  • 0 in reply to joe mccarron

    "I think the SIGNAL is a debugger thing for generating code that runs to simulate event for the controller."

    Yes, uVision has "Signal Functions" - but that was not uVision syntax.

    It was definitely AVR source code - he said so himself: "ATMEGA32" (that's an AVR)

  • 0 in reply to Andy Neil

    Hi, the point was the while loop sending string to USART. Sorry... Mirek