X-Git-Url: http://sigrok.org/gitweb/?a=blobdiff_plain;f=src%2Fhardware%2Fhung-chang-dso-2100%2Fprotocol.c;h=69efb14d3c332b125334490b4ebc901ed25794be;hb=ebcd1aba011ba6e1082e96be3cd7e47374a516b4;hp=88c47e0ae811a938101570af66774eef18fe66df;hpb=99f8fa25194aca21ec400353902e90eb425bd620;p=libsigrok.git

diff --git a/src/hardware/hung-chang-dso-2100/protocol.c b/src/hardware/hung-chang-dso-2100/protocol.c
index 88c47e0a..69efb14d 100644
--- a/src/hardware/hung-chang-dso-2100/protocol.c
+++ b/src/hardware/hung-chang-dso-2100/protocol.c
@@ -18,6 +18,7 @@
  */
 
 #include <config.h>
+#include <math.h>
 #include <ieee1284.h>
 #include "protocol.h"
 
@@ -78,11 +79,11 @@
  *  		trigger on (rising or falling)
  *  		The next state is 0x0C
  *  0x0C	Same as state 0x0F but expects the calibration
- *  		value for the first channel's  position
+ *  		value for the first channel's position
  *  		(POS1 in the schematics)
  *  		The next state is 0x0D
  *  0x0D	Same as state 0x0F but expects the calibration
- *  		value for the second channel's  position
+ *  		value for the second channel's position
  *  		(POS2 in the schematics)
  *  		The next state is 0x0E
  *  0x0E	Same as state 0x0F but expects the trigger level
@@ -344,7 +345,10 @@ static void push_samples(const struct sr_dev_inst *sdi, uint8_t *buf, size_t num
 	while (num--)
 		data[num] = (buf[num] - 0x80) * factor;
 
-	sr_analog_init(&analog, &encoding, &meaning, &spec, 0);
+	float vdivlog = log10f(factor);
+	int digits = -(int)vdivlog + (vdivlog < 0.0);
+
+	sr_analog_init(&analog, &encoding, &meaning, &spec, digits);
 	analog.meaning->channels = devc->enabled_channel;
 	analog.meaning->mq = SR_MQ_VOLTAGE;
 	analog.meaning->unit = SR_UNIT_VOLT;
@@ -416,7 +420,7 @@ static int read_subframe(const struct sr_dev_inst *sdi, uint8_t *buf)
 SR_PRIV int hung_chang_dso_2100_poll(int fd, int revents, void *cb_data)
 {
 	struct sr_datafeed_packet packet = { .type = SR_DF_FRAME_BEGIN };
-	const struct sr_dev_inst *sdi;
+	struct sr_dev_inst *sdi;
 	struct dev_context *devc;
 	uint8_t state, buf[1000];
 
@@ -460,7 +464,7 @@ SR_PRIV int hung_chang_dso_2100_poll(int fd, int revents, void *cb_data)
 	sr_session_send(sdi, &packet);
 
 	if (++devc->frame >= devc->frame_limit)
-		hung_chang_dso_2100_dev_acquisition_stop(sdi);
+		sr_dev_acquisition_stop(sdi);
 	else
 		hung_chang_dso_2100_move_to(sdi, 0x21);