> > The hardware works OK. If I call the __getchar() or getchar() function
> it works Ok. If I use gets() the softtware hangs waiting for some kind
> of character that never arrives. I've tested various terminal programs.
>

I've just solved my problem. I didn't knew that gets() function needs
a line feed character instead a carrier retur character to end typing
the string. After some reverse engineering and some tests, I realized
of this issue. This is still annoying, because I need to ype
Ctrl-Enter on my terminal (Realterm or Hyperterminal) every time I
have to send a LF character. Can I get rid off this?

TYA

Beginning Microcontrollers with the MSP430

linked82 wrote:
>
> > >
> >
> > The hardware works OK. If I call the __getchar() or getchar() function
> > it works Ok. If I use gets() the softtware hangs waiting for some kind
> > of character that never arrives. I've tested various terminal programs.
> > I've just solved my problem. I didn't knew that gets() function needs
> a line feed character instead a carrier retur character to end typing
> the string. After some reverse engineering and some tests, I realized
> of this issue. This is still annoying, because I need to ype
> Ctrl-Enter on my terminal (Realterm or Hyperterminal) every time I
> have to send a LF character. Can I get rid off this?
>
> TYA

Hi!

The "gets" function simply waits for the '\n' character.

Maybe you can do some kind of translation in your __getchar routine?
(I.e. when ever you recieve a CR you let __getchar return a NL.)

Alternatively, you can rewrite the "gets" routine (the full version of
IAR Embedded Workbench comes with library source).

-- Anders Lindgren
--
Disclaimer: Opinions expressed in this posting are strictly my own and
not necessarily those of my employer.

I didn't know it was a simple as that :-)
The higher layers of C library don't translate these chars.

There's 2 ways to overcome this :
- Set Hyperterminal to send a CR-LF when you press enter. (easiest)
Connection properties -> Settings -> ASCII setup -> ASCII Sending :
Enable "Send line ends with line feeds"
(same for receive if you want)
- You can set up your low level __getchar() func to translate a CR into CR-LF
This is easier to do when you use INT driven circular buffers though.

Best Regards,
Kris

-----Original Message-----
From: m... [mailto:m...] On Behalf Of linked82
Sent: Thursday, 8 November 2007 9:07 AM
To: m...
Subject: [msp430] Re: Annoying Scanf
> > The hardware works OK. If I call the __getchar() or getchar() function
> it works Ok. If I use gets() the softtware hangs waiting for some kind
> of character that never arrives. I've tested various terminal programs.
>

I've just solved my problem. I didn't knew that gets() function needs
a line feed character instead a carrier retur character to end typing
the string. After some reverse engineering and some tests, I realized
of this issue. This is still annoying, because I need to ype
Ctrl-Enter on my terminal (Realterm or Hyperterminal) every time I
have to send a LF character. Can I get rid off this?

TYA

> > > > Hi all,
> > > >
> > > > I'm still unable to use scanf because I can't find any useful info
> > > > about how to make it work. I've implemented the getchar() and
> > > > putchar() on my own code, but it still hangs when enters the
scanf()
> > > > or gets() functions. I know that there are low level get
functions,
> > > > but how to configure them? I can't understand why putchar()
works fine
> > > > with printf() but getchar don't. Here's may code.
> > >
> > > What compiler?
> > >
> >
> > IAR 3.40A
>
> Do you use CLib or DLib?
>
CLIB

> If it doesn't work with a simple poll there's obviously no point in
putting in interrupts.
> Can you probe/trace on RXD pin & check that your serial (logic) data
indeed arrives at MSP430 ?
> Set your Terminal for slow speed, like 1200 bps or so. When you
press a key you should see the RXD
> pin pulsing to low for a few mS - make sure that's OK.
> If all OK, check initialisation, some simple test code :
>
> Say, using SMCLK at 8 MHz, 9,600 bps :
>
> #define BAUD (9600)
>
> void init_UART1 (void) {
> UCTL_1 |= SWRST;
> UCTL_1 |= CHAR; // UART1=Async,8
bit,1 stop,
> // no parity, enable
SWRST=0,
> UTCTL_1 = SSEL1+SSEL0; // SSEL=SMCLK
> URCTL_1 = URXEIE; // all RXd chars set
URXIFG1
> U1BR0 = (unsigned char)(8000000UL/BAUD);
> U1BR1 = 8000000UL/BAUD/256;
> UMCTL_1 = 0; // Baudrate set
> ME2 |= URXE1+UTXE1; // enable UART1 RX + TX
> UCTL_1 &= ~SWRST;
> P3SEL |= (BIT6 + BIT7); // select RXD & TXD alt pin
> P3DIR |= BIT6; // TXD1 out
> }

The hardware works OK. If I call the __getchar() or getchar() function
it works Ok. If I use gets() the softtware hangs waiting for some kind
of character that never arrives. I've tested various terminal programs.

Hmmm. OK, these things can get frustrating at times.
You must have a problem with either :
- initialisation of USART1
- hardware issue

If it doesn't work with a simple poll there's obviously no point in putting in interrupts.
Can you probe/trace on RXD pin & check that your serial (logic) data indeed arrives at MSP430 ?
Set your Terminal for slow speed, like 1200 bps or so. When you press a key you should see the RXD
pin pulsing to low for a few mS - make sure that's OK.
If all OK, check initialisation, some simple test code :

Say, using SMCLK at 8 MHz, 9,600 bps :

#define BAUD (9600)

void init_UART1 (void) {
UCTL_1 |= SWRST;
UCTL_1 |= CHAR; // UART1=Async,8 bit,1 stop,
// no parity, enable SWRST=0,
UTCTL_1 = SSEL1+SSEL0; // SSEL=SMCLK
URCTL_1 = URXEIE; // all RXd chars set URXIFG1
U1BR0 = (unsigned char)(8000000UL/BAUD);
U1BR1 = 8000000UL/BAUD/256;
UMCTL_1 = 0; // Baudrate set
ME2 |= URXE1+UTXE1; // enable UART1 RX + TX
UCTL_1 &= ~SWRST;
P3SEL |= (BIT6 + BIT7); // select RXD & TXD alt pin
P3DIR |= BIT6; // TXD1 out
}
HTH
Best Regards,
Kris

-----Original Message-----
From: m... [mailto:m...] On Behalf Of linked82
Sent: Thursday, 8 November 2007 2:16 AM
To: m...
Subject: [msp430] Re: Annoying Scanf

I'm sorry for saying that this still doesn't works. When I call
gets(), I've seen that it is polling getchar for incoming characters,
but it loops and doesn't ends, even if I send CR, LF, EOL or whatever.
I'm going mad.

> I'm sorry for saying that this still doesn't works. When I call
> gets(), I've seen that it is polling getchar for incoming characters,
> but it loops and doesn't ends, even if I send CR, LF, EOL or whatever.
> I'm going mad.

Did you enable interrupts properly?

JJS

--- In m..., "microbit_virgin" wrote:
>
> If you don't use ints but polling, the least you need to do is to
wait until a char is available.
> Here's a simple example of polled serial :
>
> int __putchar (int ch)
> {
> while (!(IFG2 & UTXIFG1));
> U1TXBUF = ch;
> return ch;
> }
>
> int __getchar (void)
> {
> while (!(IFG2 & URXIFG1));
> return (U1RXBUF);
> }
>
> Also note that if you don't stick to the prototype of the LIB I/O,
your func(s) won't be called.
> Make sure getchar() returns an int.
>

I'm sorry for saying that this still doesn't works. When I call
gets(), I've seen that it is polling getchar for incoming characters,
but it loops and doesn't ends, even if I send CR, LF, EOL or whatever.
I'm going mad.

----- Original Message -----
From: "linked82"
To:
Sent: Wednesday, November 07, 2007 1:29 PM
Subject: [msp430] Annoying Scanf
> Hi all,
>
> I'm still unable to use scanf because I can't find any useful info
> about how to make it work. I've implemented the getchar() and
> putchar() on my own code, but it still hangs when enters the scanf()
> or gets() functions. I know that there are low level get functions,
> but how to configure them? I can't understand why putchar() works fine
> with printf() but getchar don't. Here's may code.

What compiler?

Leon
--
Leon Heller
Amateur radio call-sign G1HSM
Yaesu FT-817ND and FT-857D transceivers
Suzuki SV1000S motorcycle
l...@btinternet.com
http://webspace.webring.com/people/jl/leon_heller/

linked82 wrote:
> --- In m... , "Leon"
> wrote:
> >
> > ----- Original Message -----
> > From: "linked82"
> > To: >
> > Sent: Wednesday, November 07, 2007 1:29 PM
> > Subject: [msp430] Annoying Scanf
> >
> >
> > > Hi all,
> > >
> > > I'm still unable to use scanf because I can't find any useful info
> > > about how to make it work. I've implemented the getchar() and
> > > putchar() on my own code, but it still hangs when enters the scanf()
> > > or gets() functions. I know that there are low level get functions,
> > > but how to configure them? I can't understand why putchar() works fine
> > > with printf() but getchar don't. Here's may code.
> >
> > What compiler?
> > IAR 3.40A

Do you use CLib or DLib?

-- Anders
--
Disclaimer: Opinions expressed in this posting are strictly my own and
not necessarily those of my employer.