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baylibre-acme: properly set encoding digits

This commit is contained in:
Aurelien Jacobs 2016-08-24 02:38:58 +02:00
parent d043b29d5c
commit ad4c0275c2
1 changed files with 10 additions and 5 deletions
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15
src/hardware/baylibre-acme/protocol.c
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@ -18,6 +18,7 @@
*/
#include <config.h>
#include <math.h>
#include <string.h>
#include <stdlib.h>
#include <errno.h>
@ -50,6 +51,7 @@ struct channel_group_priv {
struct channel_priv {
int ch_type;
int fd;
int digits;
float val;
struct channel_group_priv *probe;
};
@ -613,18 +615,18 @@ static int channel_to_unit(struct sr_channel *ch)
}
/* We need to scale measurements down from the units used by the drivers. */
static float adjust_data(int val, int type)
static int type_digits(int type)
{
switch (type) {
case ENRG_PWR:
return ((float)val) / 1000000.0;
return 6;
case ENRG_CURR: /* Fallthrough */
case ENRG_VOL: /* Fallthrough */
case TEMP_IN: /* Fallthrough */
case TEMP_OUT:
return ((float)val) / 1000.0;
return 3;
default:
return 0.0;
return 0;
}
}
@ -648,7 +650,8 @@ static float read_sample(struct sr_channel *ch)
return -1.0;
}
return adjust_data(strtol(buf, NULL, 10), chp->ch_type);
chp->digits = type_digits(chp->ch_type);
return strtol(buf, NULL, 10) * powf(10, -chp->digits);
}
SR_PRIV int bl_acme_open_channel(struct sr_channel *ch)
@ -777,6 +780,8 @@ SR_PRIV int bl_acme_receive_data(int fd, int revents, void *cb_data)
if (i < 1)
chp->val = read_sample(ch);
analog.encoding->digits = chp->digits;
analog.spec->spec_digits = chp->digits;
analog.data = &chp->val;
sr_session_send(sdi, &packet);
}