[PATCH] tools: iio: Add single-byte case for generic_buffer

[PATCH] tools: iio: Add single-byte case for generic_buffer

[Tiberiu Breana]

Some sensors export data in an 8-bit format.
Add a single-byte case for the generic_buffer tool so that
these sensors' buffer data can be visualized.

Signed-off-by: Tiberiu Breana <tiberiu.a.breana@intel.com>
---
 tools/iio/generic_buffer.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/tools/iio/generic_buffer.c b/tools/iio/generic_buffer.c
index f805493..0d438e3 100644
--- a/tools/iio/generic_buffer.c
+++ b/tools/iio/generic_buffer.c
@@ -103,6 +103,14 @@ void process_scan(char *data,
 	for (k = 0; k < num_channels; k++)
 		switch (channels[k].bytes) {
 			/* only a few cases implemented so far */
+		case 1:
+			if (channels[k].is_signed) {
+				int8_t val = *(int8_t *)
+					(data + channels[k].location);
+				printf("%05f ",
+					((float)val) * channels[k].scale);
+			}
+			break;
 		case 2:
 			print2byte(*(uint16_t *)(data + channels[k].location),
 				   &channels[k]);
-- 
1.9.1

Re: [PATCH] tools: iio: Add single-byte case for generic_buffer

[Jonathan Cameron]

On 15/06/15 16:17, Tiberiu Breana wrote:
> Some sensors export data in an 8-bit format.
> Add a single-byte case for the generic_buffer tool so that
> these sensors' buffer data can be visualized.
> 
> Signed-off-by: Tiberiu Breana <tiberiu.a.breana@intel.com>
Hi Tiberiu,

Please take a closer look at the other cases handled, you've missed
application of the shift here and I'd also like you to cover the unsigned
case. Probably worth having a print1byte helper to keep it inline with
the other cases as well.

I was amazed that this wasn't already there ;) Oh well, guess we don't
actually have that many 8 bit of less devices or people aren't using
my dumb test code (much improved by others) with them anyway ;)

Jonathan
> ---
>  tools/iio/generic_buffer.c | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> diff --git a/tools/iio/generic_buffer.c b/tools/iio/generic_buffer.c
> index f805493..0d438e3 100644
> --- a/tools/iio/generic_buffer.c
> +++ b/tools/iio/generic_buffer.c
> @@ -103,6 +103,14 @@ void process_scan(char *data,
>  	for (k = 0; k < num_channels; k++)
>  		switch (channels[k].bytes) {
>  			/* only a few cases implemented so far */
> +		case 1:
> +			if (channels[k].is_signed) {
> +				int8_t val = *(int8_t *)
> +					(data + channels[k].location);
> +				printf("%05f ",
> +					((float)val) * channels[k].scale);
> +			}
> +			break;
>  		case 2:
>  			print2byte(*(uint16_t *)(data + channels[k].location),
>  				   &channels[k]);
> 

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