[U-Boot] help: how get last command result using scripting

[Lukasz Majewski]

Hi Michael,

> Hi
> 
> On Fri, Jun 22, 2018 at 9:10 AM, Lukasz Majewski <lukma at denx.de>
> wrote:
> > Hi Michael,
> >  
> >> Hi all
> >>
> >> Trying to understand how to get the last result. For example:
> >> sspi 1:0.3 24 700002; sspi 1:1.3 24 730000  
> >
> > The $? shall do the job.
> >  
> > => true
> > => echo $?  
> > 0  
> > => false
> > => echo $?  
> > 1  
> 
> commit d7fc57cf5637416d23adb2e5fd1e6ec8fbed6a63
> Author: Michael Trimarchi <michael at amarulasolutions.com>
> Date:   Wed Jun 20 13:46:50 2018 +0200
> 
>     cmd: spi: Export sspi command result in an enviroment variable
> 
>     We would like to export sspi result in enviroment variable to use
>     it later in any scripts

Now I do see about what you were asking for. I've misunderstood you.

> 
>     Change-Id: Iad92455630e3ef8042b2a9fe02f8995c0d8974c9
>     Signed-off-by: Michael Trimarchi <michael at amarulasolutions.com>
> 
> diff --git a/cmd/spi.c b/cmd/spi.c
> index 9a2edcf..00a9c15 100644
> --- a/cmd/spi.c
> +++ b/cmd/spi.c
> @@ -37,13 +37,18 @@ static unsigned int cs;
>  static unsigned int    mode;
>  static int             bitlen;
>  static uchar           dout[MAX_SPI_BYTES];
> -static uchar           din[MAX_SPI_BYTES];
> +static uchar           din[MAX_SPI_BYTES + 1];
> +
> +/* enviroment variable used to export the result */
> +static char            env_din[2 * MAX_SPI_BYTES];
> 
>  static int do_spi_xfer(int bus, int cs)
>  {
>         struct spi_slave *slave;
>         int ret = 0;
> 
> +       env_set("spiout", "");
> +
>  #ifdef CONFIG_DM_SPI
>         char name[30], *str;
>         struct udevice *dev;
> @@ -79,9 +84,13 @@ static int do_spi_xfer(int bus, int cs)
>         } else {
>                 int j;
> 
> -               for (j = 0; j < ((bitlen + 7) / 8); j++)
> +               for (j = 0; j < ((bitlen + 7) / 8); j++) {
>                         printf("%02X", din[j]);
> +                       sprintf(&env_din[2 * j], "%02x", din[j]);
> +               }
>                 printf("\n");
> +               env_din[2 * j] = 0;
> +               env_set("spiout", env_din);
> :
> 
> Michael
> >
> > Or have I misunderstood something?
> >  
> >>
> >> Now I need to have the last output of the last command to compare
> >> in one script. Any idea?
> >>
> >> Michael
> >> _______________________________________________
> >> U-Boot mailing list
> >> U-Boot at lists.denx.de
> >> https://lists.denx.de/listinfo/u-boot  
> >
> >
> >
> >
> > Best regards,
> >
> > Lukasz Majewski
> >
> > --
> >
> > DENX Software Engineering GmbH,      Managing Director: Wolfgang
> > Denk HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell,
> > Germany Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email:
> > wd at denx.de  
> 
> 
> 




Best regards,

Lukasz Majewski

--

DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
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