X-Git-Url: http://sigrok.org/gitweb/?a=blobdiff_plain;f=output%2Fchronovu_la8.c;h=adc6ba0d67d88df1188aa5cba9c4cb7e8b70bfd9;hb=HEAD;hp=ad0b5d32fc2c1ccaf294fabdf7035cd977cecefe;hpb=dba3e6826e3d37309ed49dd77cde346b369bc5a9;p=libsigrok.git diff --git a/output/chronovu_la8.c b/output/chronovu_la8.c deleted file mode 100644 index ad0b5d32..00000000 --- a/output/chronovu_la8.c +++ /dev/null @@ -1,190 +0,0 @@ -/* - * This file is part of the libsigrok project. - * - * Copyright (C) 2011 Uwe Hermann - * Copyright (C) 2014 Bert Vermeulen - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program. If not, see . - */ - -#include -#include -#include -#include "libsigrok.h" -#include "libsigrok-internal.h" - -#define LOG_PREFIX "output/chronovu-la8" - -struct context { - unsigned int num_enabled_channels; - gboolean triggered; - uint64_t samplerate; - uint64_t samplecount; - int *channel_index; - GString *pretrig_buf; -}; - -/** - * Check if the given samplerate is supported by the LA8 hardware. - * - * @param samplerate The samplerate (in Hz) to check. - * - * @return 1 if the samplerate is supported/valid, 0 otherwise. - */ -static gboolean is_valid_samplerate(uint64_t samplerate) -{ - unsigned int i; - - for (i = 0; i < 255; i++) { - if (samplerate == (SR_MHZ(100) / (i + 1))) - return TRUE; - } - - return FALSE; -} - -/** - * Convert a samplerate (in Hz) to the 'divcount' value the LA8 wants. - * - * LA8 hardware: sample period = (divcount + 1) * 10ns. - * Min. value for divcount: 0x00 (10ns sample period, 100MHz samplerate). - * Max. value for divcount: 0xfe (2550ns sample period, 392.15kHz samplerate). - * - * @param samplerate The samplerate in Hz. - * - * @return The divcount value as needed by the hardware, or 0xff upon errors. - */ -static uint8_t samplerate_to_divcount(uint64_t samplerate) -{ - if (samplerate == 0 || !is_valid_samplerate(samplerate)) { - sr_warn("Invalid samplerate (%" PRIu64 "Hz)", samplerate); - return 0xff; - } - - return (SR_MHZ(100) / samplerate) - 1; -} - -static int init(struct sr_output *o) -{ - struct context *ctx; - struct sr_channel *ch; - GSList *l; - - if (!o || !o->sdi) - return SR_ERR_ARG; - - ctx = g_malloc0(sizeof(struct context)); - o->internal = ctx; - - for (l = o->sdi->channels; l; l = l->next) { - ch = l->data; - if (ch->type != SR_CHANNEL_LOGIC) - continue; - if (!ch->enabled) - continue; - ctx->num_enabled_channels++; - } - ctx->channel_index = g_malloc(sizeof(int) * ctx->num_enabled_channels); - ctx->pretrig_buf = g_string_sized_new(1024); - - return SR_OK; -} - -static int receive(struct sr_output *o, const struct sr_datafeed_packet *packet, - GString **out) -{ - const struct sr_datafeed_logic *logic; - struct context *ctx; - GVariant *gvar; - uint64_t samplerate; - gchar c[4]; - - *out = NULL; - if (!o || !o->sdi) - return SR_ERR_ARG; - if (!(ctx = o->internal)) - return SR_ERR_ARG; - - switch (packet->type) { - case SR_DF_HEADER: - /* One byte for the 'divcount' value. */ - if (sr_config_get(o->sdi->driver, o->sdi, NULL, SR_CONF_SAMPLERATE, - &gvar) == SR_OK) { - samplerate = g_variant_get_uint64(gvar); - g_variant_unref(gvar); - } else - samplerate = 0; - c[0] = samplerate_to_divcount(samplerate); - *out = g_string_new_len(c, 1); - ctx->triggered = FALSE; - break; - case SR_DF_TRIGGER: - /* Four bytes (little endian) for the trigger point. */ - c[0] = ctx->samplecount & 0xff; - c[1] = (ctx->samplecount >> 8) & 0xff; - c[2] = (ctx->samplecount >> 16) & 0xff; - c[3] = (ctx->samplecount >> 24) & 0xff; - *out = g_string_new_len(c, 4); - /* Flush the pre-trigger buffer. */ - if (ctx->pretrig_buf->len) - g_string_append_len(*out, ctx->pretrig_buf->str, - ctx->pretrig_buf->len); - ctx->triggered = TRUE; - break; - case SR_DF_LOGIC: - logic = packet->payload; - if (!ctx->triggered) - g_string_append_len(ctx->pretrig_buf, logic->data, logic->length); - else - *out = g_string_new_len(logic->data, logic->length); - ctx->samplecount += logic->length / logic->unitsize; - break; - case SR_DF_END: - if (!ctx->triggered && ctx->pretrig_buf->len) { - /* We never got a trigger, submit an empty one. */ - *out = g_string_sized_new(ctx->pretrig_buf->len + 4); - g_string_append_len(*out, "\x00\x00\x00\x00", 4); - g_string_append_len(*out, ctx->pretrig_buf->str, ctx->pretrig_buf->len); - } - break; - } - - return SR_OK; -} - -static int cleanup(struct sr_output *o) -{ - struct context *ctx; - - if (!o || !o->sdi) - return SR_ERR_ARG; - - if (o->internal) { - ctx = o->internal; - g_string_free(ctx->pretrig_buf, TRUE); - g_free(ctx->channel_index); - g_free(o->internal); - o->internal = NULL; - } - - return SR_OK; -} - -SR_PRIV struct sr_output_format output_chronovu_la8 = { - .id = "chronovu-la8", - .description = "ChronoVu LA8", - .init = init, - .receive = receive, - .cleanup = cleanup, -};