#define LOG_PREFIX "input/chronovu-la8"
-#define NUM_PACKETS 2048
-#define PACKET_SIZE 4096
-#define DEFAULT_NUM_CHANNELS 8
+#define DEFAULT_NUM_CHANNELS 8
+#define DEFAULT_SAMPLERATE "100MHz"
+#define MAX_CHUNK_SIZE 4096
+#define CHRONOVU_LA8_FILESIZE 8 * 1024 * 1024 + 5
-/**
- * Convert the LA8 'divcount' value to the respective samplerate (in Hz).
- *
- * 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 divcount The divcount value as needed by the hardware.
- *
- * @return The samplerate in Hz, or 0xffffffffffffffff upon errors.
- */
-static uint64_t divcount_to_samplerate(uint8_t divcount)
-{
- if (divcount == 0xff)
- return 0xffffffffffffffffULL;
-
- return SR_MHZ(100) / (divcount + 1);
-}
+struct context {
+ gboolean started;
+ uint64_t samplerate;
+};
-static int format_match(const char *filename)
+static int format_match(GHashTable *metadata)
{
- struct stat stat_buf;
- int ret;
-
- if (!filename) {
- sr_err("%s: filename was NULL", __func__);
- // return SR_ERR; /* FIXME */
- return FALSE;
- }
-
- if (!g_file_test(filename, G_FILE_TEST_EXISTS)) {
- sr_err("%s: input file '%s' does not exist",
- __func__, filename);
- // return SR_ERR; /* FIXME */
- return FALSE;
- }
-
- if (!g_file_test(filename, G_FILE_TEST_IS_REGULAR)) {
- sr_err("%s: input file '%s' not a regular file",
- __func__, filename);
- // return SR_ERR; /* FIXME */
- return FALSE;
- }
-
- /* Only accept files of length 8MB + 5 bytes. */
- ret = stat(filename, &stat_buf);
- if (ret != 0) {
- sr_err("%s: Error getting file size of '%s'",
- __func__, filename);
- return FALSE;
- }
- if (stat_buf.st_size != (8 * 1024 * 1024 + 5)) {
- sr_dbg("%s: File size must be exactly 8388613 bytes ("
- "it actually is %d bytes in size), so this is not a "
- "ChronoVu LA8 file.", __func__, stat_buf.st_size);
- return FALSE;
- }
+ int size;
- /* TODO: Check for divcount != 0xff. */
+ size = GPOINTER_TO_INT(g_hash_table_lookup(metadata,
+ GINT_TO_POINTER(SR_INPUT_META_FILESIZE)));
+ if (size == CHRONOVU_LA8_FILESIZE)
+ return TRUE;
- return TRUE;
+ return FALSE;
}
-static int init(struct sr_input *in, const char *filename)
+static int init(struct sr_input *in, GHashTable *options)
{
struct sr_channel *ch;
+ struct context *inc;
+ uint64_t samplerate;
int num_channels, i;
- char name[SR_MAX_CHANNELNAME_LEN + 1];
- char *param;
-
- (void)filename;
-
- num_channels = DEFAULT_NUM_CHANNELS;
-
- if (in->param) {
- param = g_hash_table_lookup(in->param, "numchannels");
- if (param) {
- num_channels = strtoul(param, NULL, 10);
- if (num_channels < 1) {
- sr_err("%s: strtoul failed", __func__);
- return SR_ERR;
- }
- }
+ const char *s;
+ char name[16];
+
+ num_channels = g_variant_get_int32(g_hash_table_lookup(options, "numchannels"));
+ if (num_channels < 1) {
+ sr_err("Invalid value for numchannels: must be at least 1.");
+ return SR_ERR_ARG;
+ }
+
+ s = g_variant_get_string(g_hash_table_lookup(options, "samplerate"), NULL);
+ if (sr_parse_sizestring(s, &samplerate) != SR_OK) {
+ sr_err("Invalid samplerate '%s'.", s);
+ return SR_ERR_ARG;
}
- /* Create a virtual device. */
in->sdi = sr_dev_inst_new(0, SR_ST_ACTIVE, NULL, NULL, NULL);
+ in->priv = inc = g_malloc0(sizeof(struct context));
+ inc->samplerate = samplerate;
for (i = 0; i < num_channels; i++) {
- snprintf(name, SR_MAX_CHANNELNAME_LEN, "%d", i);
- /* TODO: Check return value. */
- if (!(ch = sr_channel_new(i, SR_CHANNEL_LOGIC, TRUE, name)))
- return SR_ERR;
+ snprintf(name, 16, "%d", i);
+ ch = sr_channel_new(i, SR_CHANNEL_LOGIC, TRUE, name);
in->sdi->channels = g_slist_append(in->sdi->channels, ch);
}
return SR_OK;
}
-static int loadfile(struct sr_input *in, const char *filename)
+static int receive(const struct sr_input *in, GString *buf)
{
struct sr_datafeed_packet packet;
struct sr_datafeed_meta meta;
struct sr_datafeed_logic logic;
struct sr_config *src;
- uint8_t buf[PACKET_SIZE], divcount;
- int i, fd, size, num_channels;
- uint64_t samplerate;
-
- /* TODO: Use glib functions! GIOChannel, g_fopen, etc. */
- if ((fd = open(filename, O_RDONLY)) == -1) {
- sr_err("%s: file open failed", __func__);
- return SR_ERR;
- }
+ struct context *inc;
+ gsize chunk_size, i;
+ int chunk, num_channels;
- num_channels = g_slist_length(in->sdi->channels);
+ inc = in->priv;
- /* Seek to the end of the file, and read the divcount byte. */
- divcount = 0x00; /* TODO: Don't hardcode! */
+ g_string_append_len(in->buf, buf->str, buf->len);
- /* Convert the divcount value to a samplerate. */
- samplerate = divcount_to_samplerate(divcount);
- if (samplerate == 0xffffffffffffffffULL) {
- close(fd); /* FIXME */
- return SR_ERR;
- }
- sr_dbg("%s: samplerate is %" PRIu64, __func__, samplerate);
+ num_channels = g_slist_length(in->sdi->channels);
- /* Send header packet to the session bus. */
std_session_send_df_header(in->sdi, LOG_PREFIX);
+ inc->started = TRUE;
- /* Send metadata about the SR_DF_LOGIC packets to come. */
packet.type = SR_DF_META;
packet.payload = &meta;
- src = sr_config_new(SR_CONF_SAMPLERATE, g_variant_new_uint64(samplerate));
+ src = sr_config_new(SR_CONF_SAMPLERATE, g_variant_new_uint64(inc->samplerate));
meta.config = g_slist_append(NULL, src);
sr_session_send(in->sdi, &packet);
sr_config_free(src);
- /* TODO: Handle trigger point. */
-
- /* Send data packets to the session bus. */
- sr_dbg("%s: sending SR_DF_LOGIC data packets", __func__);
packet.type = SR_DF_LOGIC;
packet.payload = &logic;
logic.unitsize = (num_channels + 7) / 8;
- logic.data = buf;
+ logic.data = in->buf->str;
+
+ /* Cut off at multiple of unitsize. */
+ chunk_size = in->buf->len / logic.unitsize * logic.unitsize;
- /* Send 8MB of total data to the session bus in small chunks. */
- for (i = 0; i < NUM_PACKETS; i++) {
- /* TODO: Handle errors, handle incomplete reads. */
- size = read(fd, buf, PACKET_SIZE);
- logic.length = size;
+ chunk = 0;
+ for (i = 0; i < chunk_size; i += chunk) {
+ chunk = MAX(MAX_CHUNK_SIZE, chunk_size - i);
+ logic.length = chunk;
sr_session_send(in->sdi, &packet);
}
- close(fd); /* FIXME */
- /* Send end packet to the session bus. */
- sr_dbg("%s: sending SR_DF_END", __func__);
- packet.type = SR_DF_END;
- packet.payload = NULL;
- sr_session_send(in->sdi, &packet);
+ if (in->buf->len > chunk_size)
+ g_string_erase(in->buf, 0, in->buf->len - chunk_size);
+
+ return SR_OK;
+}
+
+static int cleanup(struct sr_input *in)
+{
+ struct sr_datafeed_packet packet;
+ struct context *inc;
+
+ inc = in->priv;
+
+ if (inc->started) {
+ packet.type = SR_DF_END;
+ sr_session_send(in->sdi, &packet);
+ }
+ g_free(in->priv);
+ in->priv = NULL;
return SR_OK;
}
+static struct sr_option options[] = {
+ { "numchannels", "Number of channels", "Number of channels", NULL, NULL },
+ { "samplerate", "Sample rate", "Sample rate", NULL, NULL },
+ { 0 }
+};
+
+static struct sr_option *get_options(void)
+{
+ if (!options[0].def) {
+ options[0].def = g_variant_ref_sink(g_variant_new_int32(DEFAULT_NUM_CHANNELS));
+ options[1].def = g_variant_ref_sink(g_variant_new_string(DEFAULT_SAMPLERATE));
+ }
+
+ return options;
+}
+
SR_PRIV struct sr_input_module input_chronovu_la8 = {
.id = "chronovu-la8",
+ .name = "Chronovu-LA8",
.desc = "ChronoVu LA8",
+ .metadata = { SR_INPUT_META_FILESIZE | SR_INPUT_META_REQUIRED },
+ .options = get_options,
.format_match = format_match,
.init = init,
- .loadfile = loadfile,
+ .receive = receive,
+ .cleanup = cleanup,
};
projects / libsigrok.git / commitdiff