Hi,

I have a project where I'm using an MSP430F449.

I have been using the RS232 port to send 24 bits data to a PC using the following code:

TXBUF1=osc_volts;
while (!(IFG2 & UTXIFG1));
TXBUF1=osc_volts >> 8;
while (!(IFG2 & UTXIFG1));
TXBUF1=osc_volts>>16;
while (!(IFG2 & UTXIFG1));

(osc_volts is an unsigned long)

I would like to replace the above code with the following function:

void RS232_Write(char num_bytes, unsigned char *data)
{
do {
TXBUF1 = *data++;
while (!(IFG2 & UTXIFG1));
} while (--num_bytes);
}

Unfortuantly the compiler won't let me pass a long to the *data paremeter. How can I create a generic function that will allow me to write any data type to the RS232 port?

Thanks in advance

Andrew

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Hi again,

Sorry to waste bandwidth :(

I've just realized what I was doing wrong:

RS232_Write (3, (unsigned char *)&voltage);

This now works

Andrew

--- In m...@yahoogroups.com, "ajellisuk" wrote:
>
> Hi,
>
> I have a project where I'm using an MSP430F449.
>
> I have been using the RS232 port to send 24 bits data to a PC using the following code:
>
> TXBUF1=osc_volts;
> while (!(IFG2 & UTXIFG1));
> TXBUF1=osc_volts >> 8;
> while (!(IFG2 & UTXIFG1));
> TXBUF1=osc_volts>>16;
> while (!(IFG2 & UTXIFG1));
>
> (osc_volts is an unsigned long)
>
> I would like to replace the above code with the following function:
>
> void RS232_Write(char num_bytes, unsigned char *data)
> {
> do {
> TXBUF1 = *data++;
> while (!(IFG2 & UTXIFG1));
> } while (--num_bytes);
> }
>
> Unfortuantly the compiler won't let me pass a long to the *data paremeter. How can I create a generic function that will allow me to write any data type to the RS232 port?
>
> Thanks in advance
>
> Andrew
>
------------------------------------



(You need to be a member of msp430 -- send a blank email to msp430-subscribe@yahoogroups.com )

Andrew,
Your question/problem had nothing to do with RS232, not even with the MSP430, but with the C programming language.

Your second post actually doesn't answer the question you asked in the first one.

It would be smart for you to read the recently posted link http://www.catb.org/~esr/faqs/smart-questions.html before you ask any other question on any forum.

I think you can define your function like:
void RS232_Write(char num_bytes, void *data)
This link should help you adapt the rest of your function:
http://tigcc.ticalc.org/doc/keywords.html#void

Then, you should call it like this:
RS232_Write(sizeof(variable),&variable);

Regards,
Michael K.

--- In m...@yahoogroups.com, "ajellisuk" wrote:
>
> Hi again,
>
> Sorry to waste bandwidth :(
>
> I've just realized what I was doing wrong:
>
> RS232_Write (3, (unsigned char *)&voltage);
>
> This now works
>
> Andrew
>
> --- In m...@yahoogroups.com, "ajellisuk" wrote:
> >
> > Hi,
> >
> > I have a project where I'm using an MSP430F449.
> >
> > I have been using the RS232 port to send 24 bits data to a PC using the following code:
> >
> > TXBUF1=osc_volts;
> > while (!(IFG2 & UTXIFG1));
> > TXBUF1=osc_volts >> 8;
> > while (!(IFG2 & UTXIFG1));
> > TXBUF1=osc_volts>>16;
> > while (!(IFG2 & UTXIFG1));
> >
> > (osc_volts is an unsigned long)
> >
> > I would like to replace the above code with the following function:
> >
> > void RS232_Write(char num_bytes, unsigned char *data)
> > {
> > do {
> > TXBUF1 = *data++;
> > while (!(IFG2 & UTXIFG1));
> > } while (--num_bytes);
> > }
> >
> > Unfortuantly the compiler won't let me pass a long to the *data paremeter. How can I create a generic function that will allow me to write any data type to the RS232 port?
> >
> > Thanks in advance
> >
> > Andrew
>

------------------------------------



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