projects / libsigrok.git / blame
| Commit | Line | Data |
|---|---|---|
| 58c5f2ed | 1 | /* |
| 50985c20 | 2 | * This file is part of the libsigrok project. |
| 58c5f2ed UH |
3 | * |
| 4 | * Copyright (C) 2010-2012 Bert Vermeulen <bert@biot.com> | |
| 5 | * | |
| 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. | |
| 10 | * | |
| 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. | |
| 15 | * | |
| 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/>. | |
| 18 | */ | |
| 19 | ||
| 20 | #include "protocol.h" | |
| 21 | ||
| 22 | SR_PRIV unsigned int get_memory_size(int type) | |
| 23 | { | |
| 24 | if (type == MEMORY_SIZE_8K) | |
| 25 | return 8 * 1024; | |
| 3e43da1f RD |
26 | else if (type <= MEMORY_SIZE_8M) |
| 27 | return (32 * 1024) << type; | |
| 58c5f2ed UH |
28 | else |
| 29 | return 0; | |
| 30 | } | |
| 31 | ||
| 3e43da1f RD |
32 | SR_PRIV int clz(unsigned int x) |
| 33 | { | |
| 34 | int n = 0; | |
| 35 | if (x == 0) | |
| 36 | return 32; | |
| 37 | if (!(x & 0xFFFF0000)) { | |
| 38 | n = n + 16; | |
| 39 | x = x << 16; | |
| 40 | } | |
| 41 | if (!(x & 0xFF000000)) { | |
| 42 | n = n + 8; | |
| 43 | x = x << 8; | |
| 44 | } | |
| 45 | if (!(x & 0xF0000000)) { | |
| 46 | n = n + 4; | |
| 47 | x = x << 4; | |
| 48 | } | |
| 49 | if (!(x & 0xC0000000)) { | |
| 50 | n = n + 2; | |
| 51 | x = x << 2; | |
| 52 | } | |
| 53 | if (!(x & 0x80000000)) | |
| 54 | n = n + 1; | |
| 55 | return n; | |
| 56 | } | |
| 57 | ||
| 58c5f2ed UH |
58 | SR_PRIV int set_limit_samples(struct dev_context *devc, uint64_t samples) |
| 59 | { | |
| 60 | devc->limit_samples = samples; | |
| 61 | ||
| 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; | |
| 58c5f2ed | 66 | else |
| 3e43da1f | 67 | devc->memory_size = 19 - clz(samples - 1); |
| 58c5f2ed UH |
68 | |
| 69 | sr_info("Setting memory size to %dK.", | |
| 70 | get_memory_size(devc->memory_size) / 1024); | |
| 71 | ||
| 72 | analyzer_set_memory_size(devc->memory_size); | |
| 73 | ||
| 74 | return SR_OK; | |
| 75 | } | |
| 76 | ||
| 77 | SR_PRIV int set_capture_ratio(struct dev_context *devc, uint64_t ratio) | |
| 78 | { | |
| 79 | if (ratio > 100) { | |
| 80 | sr_err("Invalid capture ratio: %" PRIu64 ".", ratio); | |
| 81 | return SR_ERR_ARG; | |
| 82 | } | |
| 83 | ||
| 84 | devc->capture_ratio = ratio; | |
| 85 | ||
| 86 | sr_info("Setting capture ratio to %d%%.", devc->capture_ratio); | |
| 87 | ||
| 88 | return SR_OK; | |
| 89 | } | |
| 90 | ||
| 91 | SR_PRIV void set_triggerbar(struct dev_context *devc) | |
| 92 | { | |
| e495a676 | 93 | unsigned int ramsize, n, triggerbar; |
| 58c5f2ed UH |
94 | |
| 95 | ramsize = get_memory_size(devc->memory_size) / 4; | |
| 96 | if (devc->trigger) { | |
| 97 | n = ramsize; | |
| e93fb98b RD |
98 | if (devc->max_sample_depth < n) |
| 99 | n = devc->max_sample_depth; | |
| 58c5f2ed UH |
100 | if (devc->limit_samples < n) |
| 101 | n = devc->limit_samples; | |
| 102 | n = n * devc->capture_ratio / 100; | |
| 103 | if (n > ramsize - 8) | |
| 104 | triggerbar = ramsize - 8; | |
| 105 | else | |
| 106 | triggerbar = n; | |
| 107 | } else { | |
| 108 | triggerbar = 0; | |
| 109 | } | |
| 110 | analyzer_set_triggerbar_address(triggerbar); | |
| 111 | analyzer_set_ramsize_trigger_address(ramsize - triggerbar); | |
| 112 | ||
| 113 | sr_dbg("triggerbar_address = %d(0x%x)", triggerbar, triggerbar); | |
| 114 | sr_dbg("ramsize_triggerbar_address = %d(0x%x)", | |
| 115 | ramsize - triggerbar, ramsize - triggerbar); | |
| 116 | } |