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authorTiberiu Breana <tiberiu.a.breana@intel.com>2015-07-03 12:57:36 +0300
committerJonathan Cameron <jic23@kernel.org>2015-07-05 14:27:33 +0300
commite8d0927a19f11cebc4381f5f0cac8fa37154b08a (patch)
treefc886523ad9fa8c15674d3b24309cd686aa4b7ad /tools/iio
parent12ebb05246338aa9cdee51da50f57237352b3f64 (diff)
downloadlinux-e8d0927a19f11cebc4381f5f0cac8fa37154b08a.tar.xz
tools: iio: Add single-byte case for generic_buffer
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> Reviewed-by: Hartmut Knaack <knaack.h@gmx.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'tools/iio')
-rw-r--r--tools/iio/generic_buffer.c21
1 files changed, 21 insertions, 0 deletions
diff --git a/tools/iio/generic_buffer.c b/tools/iio/generic_buffer.c
index fc362d2ff983..0e737238ca74 100644
--- a/tools/iio/generic_buffer.c
+++ b/tools/iio/generic_buffer.c
@@ -61,6 +61,23 @@ int size_from_channelarray(struct iio_channel_info *channels, int num_channels)
return bytes;
}
+void print1byte(uint8_t input, struct iio_channel_info *info)
+{
+ /*
+ * Shift before conversion to avoid sign extension
+ * of left aligned data
+ */
+ input >>= info->shift;
+ input &= info->mask;
+ if (info->is_signed) {
+ int8_t val = (int8_t)(input << (8 - info->bits_used)) >>
+ (8 - info->bits_used);
+ printf("%05f ", ((float)val + info->offset) * info->scale);
+ } else {
+ printf("%05f ", ((float)input + info->offset) * info->scale);
+ }
+}
+
void print2byte(uint16_t input, struct iio_channel_info *info)
{
/* First swap if incorrect endian */
@@ -152,6 +169,10 @@ 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:
+ print1byte(*(uint8_t *)(data + channels[k].location),
+ &channels[k]);
+ break;
case 2:
print2byte(*(uint16_t *)(data + channels[k].location),
&channels[k]);