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
25 #include <sigrok-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.
39 * @return 1 if the samplerate is supported/valid, 0 otherwise.
41 static int is_valid_samplerate(uint64_t samplerate)
45 for (i = 0; i < 255; i++) {
46 if (samplerate == (SR_MHZ(100) / (i + 1)))
50 sr_warn("la8 out: %s: invalid samplerate (%" PRIu64 "Hz)",
51 __func__, samplerate);
57 * Convert a samplerate (in Hz) to the 'divcount' value the LA8 wants.
59 * LA8 hardware: sample period = (divcount + 1) * 10ns.
60 * Min. value for divcount: 0x00 (10ns sample period, 100MHz samplerate).
61 * Max. value for divcount: 0xfe (2550ns sample period, 392.15kHz samplerate).
63 * @param samplerate The samplerate in Hz.
64 * @return The divcount value as needed by the hardware, or 0xff upon errors.
66 static uint8_t samplerate_to_divcount(uint64_t samplerate)
68 if (samplerate == 0) {
69 sr_warn("la8 out: %s: samplerate was 0", __func__);
73 if (!is_valid_samplerate(samplerate)) {
74 sr_warn("la8 out: %s: can't get divcount, samplerate invalid",
79 return (SR_MHZ(100) / samplerate) - 1;
82 static int init(struct sr_output *o)
85 struct sr_probe *probe;
91 sr_warn("la8 out: %s: o was NULL", __func__);
96 sr_warn("la8 out: %s: o->device was NULL", __func__);
100 if (!o->device->plugin) {
101 sr_warn("la8 out: %s: o->device->plugin was NULL", __func__);
105 if (!(ctx = calloc(1, sizeof(struct context)))) {
106 sr_warn("la8 out: %s: ctx calloc failed", __func__);
107 return SR_ERR_MALLOC;
112 /* Get the number of probes, their names, and the unitsize. */
113 /* TODO: Error handling. */
114 for (l = o->device->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 num_probes = g_slist_length(o->device->probes);
125 if (sr_device_has_hwcap(o->device, SR_HWCAP_SAMPLERATE)) {
126 samplerate = *((uint64_t *) o->device->plugin->get_device_info(
127 o->device->plugin_index, SR_DI_CUR_SAMPLERATE));
128 /* TODO: Error checks. */
130 samplerate = 0; /* TODO: Error or set some value? */
132 ctx->samplerate = samplerate;
134 return 0; /* TODO: SR_OK? */
137 static int event(struct sr_output *o, int event_type, char **data_out,
138 uint64_t *length_out)
144 sr_warn("la8 out: %s: o was NULL", __func__);
148 if (!(ctx = o->internal)) {
149 sr_warn("la8 out: %s: o->internal was NULL", __func__);
154 sr_warn("la8 out: %s: data_out was NULL", __func__);
158 switch (event_type) {
160 sr_dbg("la8 out: %s: SR_DF_TRIGGER event", __func__);
161 /* Save the trigger point for later (SR_DF_END). */
162 ctx->trigger_point = 0; /* TODO: Store _actual_ value. */
165 sr_dbg("la8 out: %s: SR_DF_END event", __func__);
166 if (!(outbuf = malloc(4 + 1))) {
167 sr_warn("la8 out: %s: outbuf malloc failed", __func__);
168 return SR_ERR_MALLOC;
171 /* One byte for the 'divcount' value. */
172 outbuf[0] = samplerate_to_divcount(ctx->samplerate);
173 // if (outbuf[0] == 0xff) {
174 // sr_warn("la8 out: %s: invalid divcount", __func__);
178 /* Four bytes (little endian) for the trigger point. */
179 outbuf[1] = (ctx->trigger_point >> 0) & 0xff;
180 outbuf[2] = (ctx->trigger_point >> 8) & 0xff;
181 outbuf[3] = (ctx->trigger_point >> 16) & 0xff;
182 outbuf[4] = (ctx->trigger_point >> 24) & 0xff;
190 sr_warn("la8 out: %s: unsupported event type: %d", __func__,
200 static int data(struct sr_output *o, const char *data_in, uint64_t length_in,
201 char **data_out, uint64_t *length_out)
207 sr_warn("la8 out: %s: o was NULL", __func__);
211 if (!(ctx = o->internal)) {
212 sr_warn("la8 out: %s: o->internal was NULL", __func__);
217 sr_warn("la8 out: %s: data_in was NULL", __func__);
221 if (!(outbuf = calloc(1, length_in))) {
222 sr_warn("la8 out: %s: outbuf calloc failed", __func__);
223 return SR_ERR_MALLOC;
226 memcpy(outbuf, data_in, length_in);
229 *length_out = length_in;
234 struct sr_output_format output_chronovu_la8 = {
235 .id = "chronovu-la8",
236 .description = "ChronoVu LA8",
237 .df_type = SR_DF_LOGIC,