2 * This file is part of the libsigrok project.
4 * Copyright (C) 2010-2012 Bert Vermeulen <bert@biot.com>
6 * This program is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation, either version 3 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
22 SR_PRIV unsigned int get_memory_size(int type)
24 if (type == MEMORY_SIZE_8K)
26 else if (type <= MEMORY_SIZE_8M)
27 return (32 * 1024) << type;
32 SR_PRIV int clz(unsigned int x)
37 if (!(x & 0xFFFF0000)) {
41 if (!(x & 0xFF000000)) {
45 if (!(x & 0xF0000000)) {
49 if (!(x & 0xC0000000)) {
53 if (!(x & 0x80000000))
58 SR_PRIV int set_limit_samples(struct dev_context *devc, uint64_t samples)
60 devc->limit_samples = samples;
62 if (samples <= 2 * 1024)
63 devc->memory_size = MEMORY_SIZE_8K;
64 else if (samples <= 16 * 1024)
65 devc->memory_size = MEMORY_SIZE_64K;
67 devc->memory_size = 19 - clz(samples - 1);
69 sr_info("Setting memory size to %dK.",
70 get_memory_size(devc->memory_size) / 1024);
72 analyzer_set_memory_size(devc->memory_size);
77 SR_PRIV int set_capture_ratio(struct dev_context *devc, uint64_t ratio)
80 sr_err("Invalid capture ratio: %" PRIu64 ".", ratio);
84 devc->capture_ratio = ratio;
86 sr_info("Setting capture ratio to %d%%.", devc->capture_ratio);
91 SR_PRIV void set_triggerbar(struct dev_context *devc)
93 unsigned int ramsize, n, triggerbar;
95 ramsize = get_memory_size(devc->memory_size) / 4;
98 if (devc->max_sample_depth < n)
99 n = devc->max_sample_depth;
100 if (devc->limit_samples < n)
101 n = devc->limit_samples;
102 n = n * devc->capture_ratio / 100;
104 triggerbar = ramsize - 8;
110 analyzer_set_triggerbar_address(triggerbar);
111 analyzer_set_ramsize_trigger_address(ramsize - triggerbar);
113 sr_dbg("triggerbar_address = %d(0x%x)", triggerbar, triggerbar);
114 sr_dbg("ramsize_triggerbar_address = %d(0x%x)",
115 ramsize - triggerbar, ramsize - triggerbar);