input: Convert chronovu-la8 module.
This commit is contained in:
Bert Vermeulen
parent
5e83cd741f
commit
02e24c0ce0
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@ -43,10 +43,10 @@ libsigrok_la_SOURCES = \
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# Input modules
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# src/input/binary.c \
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# src/input/chronovu_la8.c \
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#
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libsigrok_la_SOURCES += \
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src/input/input.c \
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src/input/chronovu_la8.c \
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src/input/csv.c \
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src/input/vcd.c \
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src/input/wav.c
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@ -27,180 +27,150 @@
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#define LOG_PREFIX "input/chronovu-la8"
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#define NUM_PACKETS 2048
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#define PACKET_SIZE 4096
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#define DEFAULT_NUM_CHANNELS 8
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#define DEFAULT_NUM_CHANNELS 8
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#define DEFAULT_SAMPLERATE "100MHz"
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#define MAX_CHUNK_SIZE 4096
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#define CHRONOVU_LA8_FILESIZE 8 * 1024 * 1024 + 5
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/**
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* Convert the LA8 'divcount' value to the respective samplerate (in Hz).
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*
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* LA8 hardware: sample period = (divcount + 1) * 10ns.
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* Min. value for divcount: 0x00 (10ns sample period, 100MHz samplerate).
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* Max. value for divcount: 0xfe (2550ns sample period, 392.15kHz samplerate).
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*
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* @param divcount The divcount value as needed by the hardware.
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*
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* @return The samplerate in Hz, or 0xffffffffffffffff upon errors.
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*/
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static uint64_t divcount_to_samplerate(uint8_t divcount)
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struct context {
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gboolean started;
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uint64_t samplerate;
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};
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static int format_match(GHashTable *metadata)
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{
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if (divcount == 0xff)
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return 0xffffffffffffffffULL;
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int size;
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return SR_MHZ(100) / (divcount + 1);
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size = GPOINTER_TO_INT(g_hash_table_lookup(metadata,
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GINT_TO_POINTER(SR_INPUT_META_FILESIZE)));
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if (size == CHRONOVU_LA8_FILESIZE)
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return TRUE;
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return FALSE;
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}
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static int format_match(const char *filename)
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{
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struct stat stat_buf;
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int ret;
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if (!filename) {
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sr_err("%s: filename was NULL", __func__);
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// return SR_ERR; /* FIXME */
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return FALSE;
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}
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if (!g_file_test(filename, G_FILE_TEST_EXISTS)) {
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sr_err("%s: input file '%s' does not exist",
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__func__, filename);
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// return SR_ERR; /* FIXME */
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return FALSE;
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}
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if (!g_file_test(filename, G_FILE_TEST_IS_REGULAR)) {
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sr_err("%s: input file '%s' not a regular file",
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__func__, filename);
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// return SR_ERR; /* FIXME */
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return FALSE;
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}
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/* Only accept files of length 8MB + 5 bytes. */
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ret = stat(filename, &stat_buf);
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if (ret != 0) {
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sr_err("%s: Error getting file size of '%s'",
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__func__, filename);
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return FALSE;
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}
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if (stat_buf.st_size != (8 * 1024 * 1024 + 5)) {
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sr_dbg("%s: File size must be exactly 8388613 bytes ("
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"it actually is %d bytes in size), so this is not a "
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"ChronoVu LA8 file.", __func__, stat_buf.st_size);
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return FALSE;
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}
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/* TODO: Check for divcount != 0xff. */
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return TRUE;
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}
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static int init(struct sr_input *in, const char *filename)
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static int init(struct sr_input *in, GHashTable *options)
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{
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struct sr_channel *ch;
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struct context *inc;
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uint64_t samplerate;
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int num_channels, i;
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char name[SR_MAX_CHANNELNAME_LEN + 1];
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char *param;
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const char *s;
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char name[16];
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(void)filename;
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num_channels = DEFAULT_NUM_CHANNELS;
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if (in->param) {
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param = g_hash_table_lookup(in->param, "numchannels");
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if (param) {
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num_channels = strtoul(param, NULL, 10);
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if (num_channels < 1) {
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sr_err("%s: strtoul failed", __func__);
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return SR_ERR;
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}
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}
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num_channels = g_variant_get_int32(g_hash_table_lookup(options, "numchannels"));
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if (num_channels < 1) {
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sr_err("Invalid value for numchannels: must be at least 1.");
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return SR_ERR_ARG;
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}
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s = g_variant_get_string(g_hash_table_lookup(options, "samplerate"), NULL);
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if (sr_parse_sizestring(s, &samplerate) != SR_OK) {
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sr_err("Invalid samplerate '%s'.", s);
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return SR_ERR_ARG;
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}
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/* Create a virtual device. */
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in->sdi = sr_dev_inst_new(0, SR_ST_ACTIVE, NULL, NULL, NULL);
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in->priv = inc = g_malloc0(sizeof(struct context));
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inc->samplerate = samplerate;
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for (i = 0; i < num_channels; i++) {
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snprintf(name, SR_MAX_CHANNELNAME_LEN, "%d", i);
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/* TODO: Check return value. */
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if (!(ch = sr_channel_new(i, SR_CHANNEL_LOGIC, TRUE, name)))
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return SR_ERR;
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snprintf(name, 16, "%d", i);
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ch = sr_channel_new(i, SR_CHANNEL_LOGIC, TRUE, name);
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in->sdi->channels = g_slist_append(in->sdi->channels, ch);
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}
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return SR_OK;
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}
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static int loadfile(struct sr_input *in, const char *filename)
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static int receive(const struct sr_input *in, GString *buf)
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{
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struct sr_datafeed_packet packet;
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struct sr_datafeed_meta meta;
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struct sr_datafeed_logic logic;
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struct sr_config *src;
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uint8_t buf[PACKET_SIZE], divcount;
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int i, fd, size, num_channels;
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uint64_t samplerate;
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struct context *inc;
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gsize chunk_size, i;
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int chunk, num_channels;
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/* TODO: Use glib functions! GIOChannel, g_fopen, etc. */
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if ((fd = open(filename, O_RDONLY)) == -1) {
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sr_err("%s: file open failed", __func__);
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return SR_ERR;
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}
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inc = in->priv;
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g_string_append_len(in->buf, buf->str, buf->len);
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num_channels = g_slist_length(in->sdi->channels);
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/* Seek to the end of the file, and read the divcount byte. */
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divcount = 0x00; /* TODO: Don't hardcode! */
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/* Convert the divcount value to a samplerate. */
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samplerate = divcount_to_samplerate(divcount);
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if (samplerate == 0xffffffffffffffffULL) {
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close(fd); /* FIXME */
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return SR_ERR;
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}
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sr_dbg("%s: samplerate is %" PRIu64, __func__, samplerate);
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/* Send header packet to the session bus. */
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std_session_send_df_header(in->sdi, LOG_PREFIX);
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inc->started = TRUE;
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/* Send metadata about the SR_DF_LOGIC packets to come. */
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packet.type = SR_DF_META;
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packet.payload = &meta;
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src = sr_config_new(SR_CONF_SAMPLERATE, g_variant_new_uint64(samplerate));
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src = sr_config_new(SR_CONF_SAMPLERATE, g_variant_new_uint64(inc->samplerate));
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meta.config = g_slist_append(NULL, src);
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sr_session_send(in->sdi, &packet);
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sr_config_free(src);
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/* TODO: Handle trigger point. */
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/* Send data packets to the session bus. */
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sr_dbg("%s: sending SR_DF_LOGIC data packets", __func__);
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packet.type = SR_DF_LOGIC;
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packet.payload = &logic;
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logic.unitsize = (num_channels + 7) / 8;
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logic.data = buf;
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logic.data = in->buf->str;
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/* Send 8MB of total data to the session bus in small chunks. */
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for (i = 0; i < NUM_PACKETS; i++) {
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/* TODO: Handle errors, handle incomplete reads. */
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size = read(fd, buf, PACKET_SIZE);
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logic.length = size;
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/* Cut off at multiple of unitsize. */
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chunk_size = in->buf->len / logic.unitsize * logic.unitsize;
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chunk = 0;
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for (i = 0; i < chunk_size; i += chunk) {
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chunk = MAX(MAX_CHUNK_SIZE, chunk_size - i);
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logic.length = chunk;
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sr_session_send(in->sdi, &packet);
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}
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close(fd); /* FIXME */
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/* Send end packet to the session bus. */
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sr_dbg("%s: sending SR_DF_END", __func__);
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packet.type = SR_DF_END;
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packet.payload = NULL;
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sr_session_send(in->sdi, &packet);
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if (in->buf->len > chunk_size)
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g_string_erase(in->buf, 0, in->buf->len - chunk_size);
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return SR_OK;
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}
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static int cleanup(struct sr_input *in)
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{
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struct sr_datafeed_packet packet;
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struct context *inc;
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inc = in->priv;
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if (inc->started) {
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packet.type = SR_DF_END;
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sr_session_send(in->sdi, &packet);
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}
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g_free(in->priv);
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in->priv = NULL;
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return SR_OK;
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}
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static struct sr_option options[] = {
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{ "numchannels", "Number of channels", "Number of channels", NULL, NULL },
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{ "samplerate", "Sample rate", "Sample rate", NULL, NULL },
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{ 0 }
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};
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static struct sr_option *get_options(void)
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{
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if (!options[0].def) {
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options[0].def = g_variant_ref_sink(g_variant_new_int32(DEFAULT_NUM_CHANNELS));
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options[1].def = g_variant_ref_sink(g_variant_new_string(DEFAULT_SAMPLERATE));
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}
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return options;
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}
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SR_PRIV struct sr_input_module input_chronovu_la8 = {
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.id = "chronovu-la8",
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.name = "Chronovu-LA8",
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.desc = "ChronoVu LA8",
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.metadata = { SR_INPUT_META_FILESIZE | SR_INPUT_META_REQUIRED },
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.options = get_options,
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.format_match = format_match,
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.init = init,
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.loadfile = loadfile,
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.receive = receive,
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.cleanup = cleanup,
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};
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@ -67,7 +67,7 @@ extern SR_PRIV struct sr_input_module input_wav;
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static const struct sr_input_module *input_module_list[] = {
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&input_vcd,
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// &input_chronovu_la8,
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&input_chronovu_la8,
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&input_wav,
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&input_csv,
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/* This one has to be last, because it will take any input. */
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