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1 | /* | |
2 | * This file is part of the sigrok project. | |
3 | * | |
4 | * Copyright (C) 2010-2012 Bert Vermeulen <bert@biot.com> | |
5 | * Copyright (C) 2011 HÃ¥vard Espeland <gus@ping.uio.no> | |
6 | * | |
7 | * This program is free software: you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation, either version 3 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
19 | */ | |
20 | ||
21 | #include <stdlib.h> | |
22 | #include <string.h> | |
23 | #include <glib.h> | |
24 | #include "libsigrok.h" | |
25 | #include "libsigrok-internal.h" | |
26 | #include "text.h" | |
27 | ||
28 | /* Message logging helpers with driver-specific prefix string. */ | |
29 | #define DRIVER_LOG_DOMAIN "output/bits: " | |
30 | #define sr_log(l, s, args...) sr_log(l, DRIVER_LOG_DOMAIN s, ## args) | |
31 | #define sr_spew(s, args...) sr_spew(DRIVER_LOG_DOMAIN s, ## args) | |
32 | #define sr_dbg(s, args...) sr_dbg(DRIVER_LOG_DOMAIN s, ## args) | |
33 | #define sr_info(s, args...) sr_info(DRIVER_LOG_DOMAIN s, ## args) | |
34 | #define sr_warn(s, args...) sr_warn(DRIVER_LOG_DOMAIN s, ## args) | |
35 | #define sr_err(s, args...) sr_err(DRIVER_LOG_DOMAIN s, ## args) | |
36 | ||
37 | SR_PRIV int init_bits(struct sr_output *o) | |
38 | { | |
39 | return init(o, DEFAULT_BPL_BITS, MODE_BITS); | |
40 | } | |
41 | ||
42 | SR_PRIV int data_bits(struct sr_output *o, const uint8_t *data_in, | |
43 | uint64_t length_in, uint8_t **data_out, | |
44 | uint64_t *length_out) | |
45 | { | |
46 | struct context *ctx; | |
47 | unsigned int outsize, offset, p; | |
48 | int max_linelen; | |
49 | uint64_t sample; | |
50 | uint8_t *outbuf, c; | |
51 | ||
52 | ctx = o->internal; | |
53 | max_linelen = SR_MAX_PROBENAME_LEN + 3 + ctx->samples_per_line | |
54 | + ctx->samples_per_line / 8; | |
55 | /* | |
56 | * Calculate space needed for probes. Set aside 512 bytes for | |
57 | * extra output, e.g. trigger. | |
58 | */ | |
59 | outsize = 512 + (1 + (length_in / ctx->unitsize) / ctx->samples_per_line) | |
60 | * (ctx->num_enabled_probes * max_linelen); | |
61 | ||
62 | if (!(outbuf = g_try_malloc0(outsize + 1))) { | |
63 | sr_err("%s: outbuf malloc failed", __func__); | |
64 | return SR_ERR_MALLOC; | |
65 | } | |
66 | ||
67 | outbuf[0] = '\0'; | |
68 | if (ctx->header) { | |
69 | /* The header is still here, this must be the first packet. */ | |
70 | strncpy((char *)outbuf, ctx->header, outsize); | |
71 | g_free(ctx->header); | |
72 | ctx->header = NULL; | |
73 | ||
74 | /* Ensure first transition. */ | |
75 | memcpy(&ctx->prevsample, data_in, ctx->unitsize); | |
76 | ctx->prevsample = ~ctx->prevsample; | |
77 | } | |
78 | ||
79 | if (length_in >= ctx->unitsize) { | |
80 | for (offset = 0; offset <= length_in - ctx->unitsize; | |
81 | offset += ctx->unitsize) { | |
82 | memcpy(&sample, data_in + offset, ctx->unitsize); | |
83 | for (p = 0; p < ctx->num_enabled_probes; p++) { | |
84 | c = (sample & ((uint64_t) 1 << p)) ? '1' : '0'; | |
85 | ctx->linebuf[p * ctx->linebuf_len + | |
86 | ctx->line_offset] = c; | |
87 | } | |
88 | ctx->line_offset++; | |
89 | ctx->spl_cnt++; | |
90 | ||
91 | /* Add a space every 8th bit. */ | |
92 | if ((ctx->spl_cnt & 7) == 0) { | |
93 | for (p = 0; p < ctx->num_enabled_probes; p++) | |
94 | ctx->linebuf[p * ctx->linebuf_len + | |
95 | ctx->line_offset] = ' '; | |
96 | ctx->line_offset++; | |
97 | } | |
98 | ||
99 | /* End of line. */ | |
100 | if (ctx->spl_cnt >= ctx->samples_per_line) { | |
101 | flush_linebufs(ctx, outbuf); | |
102 | ctx->line_offset = ctx->spl_cnt = 0; | |
103 | ctx->mark_trigger = -1; | |
104 | } | |
105 | } | |
106 | } else { | |
107 | sr_info("Short buffer (length_in=%" PRIu64 ").", length_in); | |
108 | } | |
109 | ||
110 | *data_out = outbuf; | |
111 | *length_out = strlen((const char *)outbuf); | |
112 | ||
113 | return SR_OK; | |
114 | } | |
115 | ||
116 | SR_PRIV struct sr_output_format output_text_bits = { | |
117 | .id = "bits", | |
118 | .description = "Bits", | |
119 | .df_type = SR_DF_LOGIC, | |
120 | .init = init_bits, | |
121 | .data = data_bits, | |
122 | .event = event, | |
123 | }; |