X-Git-Url: https://sigrok.org/gitweb/?a=blobdiff_plain;f=src%2Finput%2Fchronovu_la8.c;h=53e1477321510583c7529d60c8411ccc4c5b4b01;hb=6ec6c43b4738dbc7091f4a49a4ec80ea6102cb52;hp=0ac5e54a8fd23910151b18296c04aa82eb8d7c7e;hpb=17bfaca62aaacec71c6da4bd927af051727593b6;p=libsigrok.git diff --git a/src/input/chronovu_la8.c b/src/input/chronovu_la8.c index 0ac5e54a..53e14773 100644 --- a/src/input/chronovu_la8.c +++ b/src/input/chronovu_la8.c @@ -18,189 +18,169 @@ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ +#include #include #include #include #include -#include "libsigrok.h" +#include #include "libsigrok-internal.h" #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 SR_MHZ(100) +#define MAX_CHUNK_SIZE (4 * 1024) +#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; - } + int size; - 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; - } + size = GPOINTER_TO_INT(g_hash_table_lookup(metadata, + GINT_TO_POINTER(SR_INPUT_META_FILESIZE))); + if (size == CHRONOVU_LA8_FILESIZE) + return SR_OK; - /* 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; - } - - /* TODO: Check for divcount != 0xff. */ - - return TRUE; + return SR_ERR; } -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; int num_channels, i; - char name[SR_MAX_CHANNELNAME_LEN + 1]; - char *param; - - (void)filename; + char name[16]; - 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; - } - } + 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; } - /* Create a virtual device. */ - in->sdi = sr_dev_inst_new(0, SR_ST_ACTIVE, NULL, NULL, NULL); + in->sdi = g_malloc0(sizeof(struct sr_dev_inst)); + in->priv = inc = g_malloc0(sizeof(struct context)); + + inc->samplerate = g_variant_get_uint64(g_hash_table_lookup(options, "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; - in->sdi->channels = g_slist_append(in->sdi->channels, ch); + snprintf(name, 16, "%d", i); + sr_channel_new(in->sdi, i, SR_CHANNEL_LOGIC, TRUE, name); } return SR_OK; } -static int loadfile(struct sr_input *in, const char *filename) +static int process_buffer(struct sr_input *in) { 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; + struct context *inc; + gsize chunk_size, i; + int chunk; + + inc = in->priv; + if (!inc->started) { + std_session_send_df_header(in->sdi, LOG_PREFIX); + + if (inc->samplerate) { + packet.type = SR_DF_META; + packet.payload = &meta; + 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: Use glib functions! GIOChannel, g_fopen, etc. */ - if ((fd = open(filename, O_RDONLY)) == -1) { - sr_err("%s: file open failed", __func__); - return SR_ERR; + inc->started = TRUE; } - num_channels = g_slist_length(in->sdi->channels); + packet.type = SR_DF_LOGIC; + packet.payload = &logic; + logic.unitsize = (g_slist_length(in->sdi->channels) + 7) / 8; - /* Seek to the end of the file, and read the divcount byte. */ - divcount = 0x00; /* TODO: Don't hardcode! */ + /* Cut off at multiple of unitsize. */ + chunk_size = in->buf->len / logic.unitsize * logic.unitsize; - /* Convert the divcount value to a samplerate. */ - samplerate = divcount_to_samplerate(divcount); - if (samplerate == 0xffffffffffffffffULL) { - close(fd); /* FIXME */ - return SR_ERR; + for (i = 0; i < chunk_size; i += chunk) { + logic.data = in->buf->str + i; + chunk = MIN(MAX_CHUNK_SIZE, chunk_size - i); + logic.length = chunk; + sr_session_send(in->sdi, &packet); } - sr_dbg("%s: samplerate is %" PRIu64, __func__, samplerate); + g_string_erase(in->buf, 0, chunk_size); - /* Send header packet to the session bus. */ - std_session_send_df_header(in->sdi, LOG_PREFIX); + return SR_OK; +} - /* 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)); - meta.config = g_slist_append(NULL, src); - sr_session_send(in->sdi, &packet); - sr_config_free(src); +static int receive(struct sr_input *in, GString *buf) +{ + int ret; - /* TODO: Handle trigger point. */ + g_string_append_len(in->buf, buf->str, buf->len); - /* 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; - - /* 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; + if (!in->sdi_ready) { + /* sdi is ready, notify frontend. */ + in->sdi_ready = TRUE; + return SR_OK; + } + + ret = process_buffer(in); + + return ret; +} + +static int end(struct sr_input *in) +{ + struct context *inc; + struct sr_datafeed_packet packet; + int ret; + + if (in->sdi_ready) + ret = process_buffer(in); + else + ret = SR_OK; + + inc = in->priv; + if (inc->started) { + packet.type = SR_DF_END; 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); + return ret; +} + +static struct sr_option options[] = { + { "numchannels", "Number of channels", "Number of channels", NULL, NULL }, + { "samplerate", "Sample rate", "Sample rate", NULL, NULL }, + ALL_ZERO +}; - return SR_OK; +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_uint64(DEFAULT_SAMPLERATE)); + } + + return options; } SR_PRIV struct sr_input_module input_chronovu_la8 = { .id = "chronovu-la8", + .name = "Chronovu-LA8", .desc = "ChronoVu LA8", + .exts = (const char*[]){"kdt", NULL}, + .metadata = { SR_INPUT_META_FILESIZE | SR_INPUT_META_REQUIRED }, + .options = get_options, .format_match = format_match, .init = init, - .loadfile = loadfile, + .receive = receive, + .end = end, };