2 * This file is part of the sigrok project.
4 * Copyright (C) 2011 Uwe Hermann <uwe@hermann-uwe.de>
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 2 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, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
24 #include "libsigrok.h"
25 #include "libsigrok-internal.h"
28 unsigned int num_enabled_probes;
29 unsigned int unitsize;
30 char *probelist[SR_MAX_NUM_PROBES + 1];
31 uint64_t trigger_point;
36 * Check if the given samplerate is supported by the LA8 hardware.
38 * @param samplerate The samplerate (in Hz) to check.
40 * @return 1 if the samplerate is supported/valid, 0 otherwise.
42 static int is_valid_samplerate(uint64_t samplerate)
46 for (i = 0; i < 255; i++) {
47 if (samplerate == (SR_MHZ(100) / (i + 1)))
51 sr_warn("la8 out: %s: invalid samplerate (%" PRIu64 "Hz)",
52 __func__, samplerate);
58 * Convert a samplerate (in Hz) to the 'divcount' value the LA8 wants.
60 * LA8 hardware: sample period = (divcount + 1) * 10ns.
61 * Min. value for divcount: 0x00 (10ns sample period, 100MHz samplerate).
62 * Max. value for divcount: 0xfe (2550ns sample period, 392.15kHz samplerate).
64 * @param samplerate The samplerate in Hz.
66 * @return The divcount value as needed by the hardware, or 0xff upon errors.
68 static uint8_t samplerate_to_divcount(uint64_t samplerate)
70 if (samplerate == 0) {
71 sr_warn("la8 out: %s: samplerate was 0", __func__);
75 if (!is_valid_samplerate(samplerate)) {
76 sr_warn("la8 out: %s: can't get divcount, samplerate invalid",
81 return (SR_MHZ(100) / samplerate) - 1;
84 static int init(struct sr_output *o)
87 struct sr_probe *probe;
92 sr_warn("la8 out: %s: o was NULL", __func__);
97 sr_warn("la8 out: %s: o->sdi was NULL", __func__);
101 if (!o->sdi->driver) {
102 sr_warn("la8 out: %s: o->sdi->driver was NULL", __func__);
106 if (!(ctx = g_try_malloc0(sizeof(struct context)))) {
107 sr_warn("la8 out: %s: ctx malloc failed", __func__);
108 return SR_ERR_MALLOC;
113 /* Get the probe names and the unitsize. */
114 for (l = o->sdi->probes; l; l = l->next) {
118 ctx->probelist[ctx->num_enabled_probes++] = probe->name;
120 ctx->probelist[ctx->num_enabled_probes] = 0;
121 ctx->unitsize = (ctx->num_enabled_probes + 7) / 8;
123 if (sr_dev_has_hwcap(o->sdi, SR_HWCAP_SAMPLERATE)) {
124 o->sdi->driver->info_get(SR_DI_CUR_SAMPLERATE,
125 (const void **)&samplerate, o->sdi);
126 ctx->samplerate = *samplerate;
133 static int event(struct sr_output *o, int event_type, uint8_t **data_out,
134 uint64_t *length_out)
140 sr_warn("la8 out: %s: o was NULL", __func__);
144 if (!(ctx = o->internal)) {
145 sr_warn("la8 out: %s: o->internal was NULL", __func__);
150 sr_warn("la8 out: %s: data_out was NULL", __func__);
154 switch (event_type) {
156 sr_dbg("la8 out: %s: SR_DF_TRIGGER event", __func__);
157 /* Save the trigger point for later (SR_DF_END). */
158 ctx->trigger_point = 0; /* TODO: Store _actual_ value. */
161 sr_dbg("la8 out: %s: SR_DF_END event", __func__);
162 if (!(outbuf = g_try_malloc(4 + 1))) {
163 sr_warn("la8 out: %s: outbuf malloc failed", __func__);
164 return SR_ERR_MALLOC;
167 /* One byte for the 'divcount' value. */
168 outbuf[0] = samplerate_to_divcount(ctx->samplerate);
169 // if (outbuf[0] == 0xff) {
170 // sr_warn("la8 out: %s: invalid divcount", __func__);
174 /* Four bytes (little endian) for the trigger point. */
175 outbuf[1] = (ctx->trigger_point >> 0) & 0xff;
176 outbuf[2] = (ctx->trigger_point >> 8) & 0xff;
177 outbuf[3] = (ctx->trigger_point >> 16) & 0xff;
178 outbuf[4] = (ctx->trigger_point >> 24) & 0xff;
186 sr_warn("la8 out: %s: unsupported event type: %d", __func__,
196 static int data(struct sr_output *o, const uint8_t *data_in,
197 uint64_t length_in, uint8_t **data_out, uint64_t *length_out)
203 sr_warn("la8 out: %s: o was NULL", __func__);
207 if (!(ctx = o->internal)) {
208 sr_warn("la8 out: %s: o->internal was NULL", __func__);
213 sr_warn("la8 out: %s: data_in was NULL", __func__);
217 if (!(outbuf = g_try_malloc0(length_in))) {
218 sr_warn("la8 out: %s: outbuf malloc failed", __func__);
219 return SR_ERR_MALLOC;
222 memcpy(outbuf, data_in, length_in);
225 *length_out = length_in;
230 SR_PRIV struct sr_output_format output_chronovu_la8 = {
231 .id = "chronovu-la8",
232 .description = "ChronoVu LA8",
233 .df_type = SR_DF_LOGIC,