From: Gerhard Sittig <redacted>
Date: Sun, 13 May 2018 17:40:00 +0000 (+0200)
Subject: demo: add convenient bit mask for "all logic channels"
X-Git-Url: https://sigrok.org/gitweb/?p=libsigrok.git;a=commitdiff_plain;h=015f09702a95ca3f3d17f3f45f24657547312fe3

demo: add convenient bit mask for "all logic channels"

Keep a context variable around with a bit mask for all logic channels.
This is convenient in setup and generation routines, to avoid garbage
in unassigned bit positions of session feed packets.
---

diff --git a/src/hardware/demo/api.c b/src/hardware/demo/api.c
index c5259b28..7f2971db 100644
--- a/src/hardware/demo/api.c
+++ b/src/hardware/demo/api.c
@@ -119,6 +119,9 @@ static GSList *scan(struct sr_dev_driver *di, GSList *options)
 	devc->cur_samplerate = SR_KHZ(200);
 	devc->num_logic_channels = num_logic_channels;
 	devc->logic_unitsize = (devc->num_logic_channels + 7) / 8;
+	devc->all_logic_channels_mask = 1UL << 0;
+	devc->all_logic_channels_mask <<= devc->num_logic_channels;
+	devc->all_logic_channels_mask--;
 	devc->logic_pattern = DEFAULT_LOGIC_PATTERN;
 	devc->num_analog_channels = num_analog_channels;
 
diff --git a/src/hardware/demo/protocol.h b/src/hardware/demo/protocol.h
index e2934980..c35ea2d4 100644
--- a/src/hardware/demo/protocol.h
+++ b/src/hardware/demo/protocol.h
@@ -99,6 +99,7 @@ struct dev_context {
 	/* Logic */
 	int32_t num_logic_channels;
 	size_t logic_unitsize;
+	uint64_t all_logic_channels_mask;
 	/* There is only ever one logic channel group, so its pattern goes here. */
 	enum logic_pattern_type logic_pattern;
 	uint8_t logic_data[LOGIC_BUFSIZE];