#include <fcntl.h>
#include <unistd.h>
#include <sys/stat.h>
-#include "libsigrok.h"
+#include <libsigrok/libsigrok.h>
#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,
};
projects / libsigrok.git / blobdiff