* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
+#include <string.h>
#include "protocol.h"
-SR_PRIV int cem_dt_885x_receive_data(int fd, int revents, void *cb_data)
+/* Length of expected payload for each token. */
+static int token_payloads[][2] = {
+ { TOKEN_WEIGHT_TIME_FAST, 0 },
+ { TOKEN_WEIGHT_TIME_SLOW, 0 },
+ { TOKEN_HOLD_MAX, 0 },
+ { TOKEN_HOLD_MIN, 0 },
+ { TOKEN_TIME, 3 },
+ { TOKEN_MEAS_RANGE_OVER, 0 },
+ { TOKEN_MEAS_RANGE_UNDER, 0 },
+ { TOKEN_STORE_FULL, 0 },
+ { TOKEN_RECORDING_ON, 0 },
+ { TOKEN_MEAS_WAS_READOUT, 1 },
+ { TOKEN_MEAS_WAS_BARGRAPH, 0 },
+ { TOKEN_MEASUREMENT, 2 },
+ { TOKEN_HOLD_NONE, 0 },
+ { TOKEN_BATTERY_LOW, 0 },
+ { TOKEN_MEAS_RANGE_OK, 0 },
+ { TOKEN_STORE_OK, 0 },
+ { TOKEN_RECORDING_OFF, 0 },
+ { TOKEN_WEIGHT_FREQ_A, 1 },
+ { TOKEN_WEIGHT_FREQ_C, 1 },
+ { TOKEN_BATTERY_OK, 0 },
+ { TOKEN_MEAS_RANGE_30_80, 0 },
+ { TOKEN_MEAS_RANGE_30_130, 0 },
+ { TOKEN_MEAS_RANGE_50_100, 0 },
+ { TOKEN_MEAS_RANGE_80_130, 0 },
+};
+
+static int find_token_payload_len(unsigned char c)
{
- (void)fd;
+ unsigned int i;
- const struct sr_dev_inst *sdi;
+ for (i = 0; i < ARRAY_SIZE(token_payloads); i++) {
+ if (token_payloads[i][0] == c)
+ return token_payloads[i][1];
+ }
+
+ return -1;
+}
+
+/* Process measurement or setting (0xa5 command). */
+static void process_mset(const struct sr_dev_inst *sdi)
+{
struct dev_context *devc;
+ struct sr_datafeed_packet packet;
+ struct sr_datafeed_analog analog;
+ GString *dbg;
+ float fvalue;
+ int i;
- if (!(sdi = cb_data))
- return TRUE;
+ devc = sdi->priv;
+ if (sr_log_loglevel_get() >= SR_LOG_SPEW) {
+ dbg = g_string_sized_new(128);
+ g_string_printf(dbg, "got command 0x%.2x token 0x%.2x",
+ devc->cmd, devc->token);
+ if (devc->buf_len) {
+ g_string_append_printf(dbg, " payload");
+ for (i = 0; i < devc->buf_len; i++)
+ g_string_append_printf(dbg, " %.2x", devc->buf[i]);
+ }
+ sr_spew("%s", dbg->str);
+ g_string_free(dbg, TRUE);
+ }
+
+ switch(devc->token) {
+ case TOKEN_WEIGHT_TIME_FAST:
+ devc->cur_mqflags |= SR_MQFLAG_SPL_TIME_WEIGHT_F;
+ devc->cur_mqflags &= ~SR_MQFLAG_SPL_TIME_WEIGHT_S;
+ break;
+ case TOKEN_WEIGHT_TIME_SLOW:
+ devc->cur_mqflags |= SR_MQFLAG_SPL_TIME_WEIGHT_S;
+ devc->cur_mqflags &= ~SR_MQFLAG_SPL_TIME_WEIGHT_F;
+ break;
+ case TOKEN_WEIGHT_FREQ_A:
+ devc->cur_mqflags |= SR_MQFLAG_SPL_FREQ_WEIGHT_A;
+ devc->cur_mqflags &= ~SR_MQFLAG_SPL_FREQ_WEIGHT_C;
+ break;
+ case TOKEN_WEIGHT_FREQ_C:
+ devc->cur_mqflags |= SR_MQFLAG_SPL_FREQ_WEIGHT_C;
+ devc->cur_mqflags &= ~SR_MQFLAG_SPL_FREQ_WEIGHT_A;
+ break;
+ case TOKEN_HOLD_MAX:
+ devc->cur_mqflags |= SR_MQFLAG_HOLD | SR_MQFLAG_MAX;
+ devc->cur_mqflags &= ~SR_MQFLAG_MIN;
+ break;
+ case TOKEN_HOLD_MIN:
+ devc->cur_mqflags |= SR_MQFLAG_HOLD | SR_MQFLAG_MIN;
+ devc->cur_mqflags &= ~SR_MQFLAG_MAX;
+ break;
+ case TOKEN_HOLD_NONE:
+ devc->cur_mqflags &= ~(SR_MQFLAG_MAX | SR_MQFLAG_MIN | SR_MQFLAG_HOLD);
+ break;
+ case TOKEN_MEASUREMENT:
+ fvalue = ((devc->buf[0] & 0xf0) >> 4) * 100;
+ fvalue += (devc->buf[0] & 0x0f) * 10;
+ fvalue += ((devc->buf[1] & 0xf0) >> 4);
+ fvalue += (devc->buf[1] & 0x0f) / 10.0;
+ devc->last_spl = fvalue;
+ break;
+ case TOKEN_MEAS_WAS_READOUT:
+ case TOKEN_MEAS_WAS_BARGRAPH:
+ if (devc->cur_mqflags & (SR_MQFLAG_MAX | SR_MQFLAG_MIN)) {
+ if (devc->token == TOKEN_MEAS_WAS_BARGRAPH) {
+ /* The device still sends bargraph measurements even
+ * when in max/min hold mode. Suppress them here, unless
+ * they're readout values. This duplicates the behavior
+ * of the device display exactly. */
+ break;
+ }
+ }
+ memset(&analog, 0, sizeof(struct sr_datafeed_analog));
+ analog.mq = SR_MQ_SOUND_PRESSURE_LEVEL;
+ analog.mqflags = devc->cur_mqflags;
+ analog.unit = SR_UNIT_DECIBEL_SPL;
+ analog.channels = sdi->channels;
+ analog.num_samples = 1;
+ analog.data = &devc->last_spl;
+ packet.type = SR_DF_ANALOG;
+ packet.payload = &analog;
+ sr_session_send(devc->cb_data, &packet);
+
+ devc->num_samples++;
+ if (devc->limit_samples && devc->num_samples >= devc->limit_samples)
+ sdi->driver->dev_acquisition_stop((struct sr_dev_inst *)sdi,
+ devc->cb_data);
+ break;
+ case TOKEN_RECORDING_ON:
+ devc->recording = TRUE;
+ break;
+ case TOKEN_RECORDING_OFF:
+ devc->recording = FALSE;
+ break;
+ case TOKEN_MEAS_RANGE_30_80:
+ case TOKEN_MEAS_RANGE_30_130:
+ case TOKEN_MEAS_RANGE_50_100:
+ case TOKEN_MEAS_RANGE_80_130:
+ devc->cur_meas_range = devc->token;
+ break;
+ case TOKEN_TIME:
+ case TOKEN_STORE_OK:
+ case TOKEN_STORE_FULL:
+ case TOKEN_BATTERY_OK:
+ case TOKEN_BATTERY_LOW:
+ case TOKEN_MEAS_RANGE_OK:
+ case TOKEN_MEAS_RANGE_OVER:
+ case TOKEN_MEAS_RANGE_UNDER:
+ /* Not useful, or not expressable in sigrok. */
+ break;
+ }
+
+}
+
+static void send_data(const struct sr_dev_inst *sdi, unsigned char *data,
+ uint64_t num_samples)
+{
+ struct dev_context *devc;
+ struct sr_datafeed_packet packet;
+ struct sr_datafeed_analog analog;
+ float fbuf[SAMPLES_PER_PACKET];
+ unsigned int i;
+
+ devc = sdi->priv;
+
+ for (i = 0; i < num_samples; i ++) {
+ fbuf[i] = ((data[i * 2] & 0xf0) >> 4) * 100;
+ fbuf[i] += (data[i * 2] & 0x0f) * 10;
+ fbuf[i] += ((data[i * 2 + 1] & 0xf0) >> 4);
+ fbuf[i] += (data[i * 2 + 1] & 0x0f) / 10.0;
+ }
+ memset(&analog, 0, sizeof(struct sr_datafeed_analog));
+ analog.mq = SR_MQ_SOUND_PRESSURE_LEVEL;
+ analog.mqflags = devc->cur_mqflags;
+ analog.unit = SR_UNIT_DECIBEL_SPL;
+ analog.channels = sdi->channels;
+ analog.num_samples = num_samples;
+ analog.data = fbuf;
+ packet.type = SR_DF_ANALOG;
+ packet.payload = &analog;
+ sr_session_send(devc->cb_data, &packet);
+
+ devc->num_samples += analog.num_samples;
+ if (devc->limit_samples && devc->num_samples >= devc->limit_samples)
+ sdi->driver->dev_acquisition_stop((struct sr_dev_inst *)sdi,
+ devc->cb_data);
+
+ return;
+}
+
+static void process_byte(const struct sr_dev_inst *sdi, const unsigned char c,
+ int handle_packets)
+{
+ struct dev_context *devc;
+ struct sr_datafeed_packet packet;
+ struct sr_datafeed_meta meta;
+ struct sr_config *src;
+ gint64 cur_time;
+ int len;
if (!(devc = sdi->priv))
+ return;
+
+ if (c == 0xff) {
+ /* Device is in hold mode */
+ devc->cur_mqflags |= SR_MQFLAG_HOLD;
+
+ if (devc->hold_last_sent == 0) {
+ /* First hold notification. */
+ devc->hold_last_sent = g_get_monotonic_time();
+ /* When the device leaves hold mode, it starts from scratch. */
+ devc->state = ST_INIT;
+ } else {
+ cur_time = g_get_monotonic_time();
+ if (cur_time - devc->hold_last_sent > HOLD_REPEAT_INTERVAL) {
+ /* Force the last measurement out again. */
+ devc->cmd = 0xa5;
+ devc->token = TOKEN_MEAS_WAS_READOUT;
+ if (handle_packets)
+ process_mset(sdi);
+ devc->hold_last_sent = cur_time;
+ }
+ }
+
+ return;
+ }
+ devc->cur_mqflags &= ~SR_MQFLAG_HOLD;
+ devc->hold_last_sent = 0;
+
+ if (devc->state == ST_INIT) {
+ if (c == 0xa5) {
+ devc->cmd = c;
+ devc->token = 0x00;
+ devc->state = ST_GET_TOKEN;
+ } else if (c == 0xbb) {
+ devc->cmd = c;
+ devc->buf_len = 0;
+ devc->state = ST_GET_LOG_HEADER;
+ sr_dbg("got command 0xbb");
+ }
+ } else if (devc->state == ST_GET_TOKEN) {
+ devc->token = c;
+ devc->buf_len = 0;
+ len = find_token_payload_len(devc->token);
+ if (len == -1 || len > 0) {
+ devc->buf_len = 0;
+ devc->state = ST_GET_DATA;
+ } else {
+ if (handle_packets)
+ process_mset(sdi);
+ devc->state = ST_INIT;
+ }
+ } else if (devc->state == ST_GET_DATA) {
+ len = find_token_payload_len(devc->token);
+ if (len == -1) {
+ /* We don't know this token. */
+ sr_dbg("Unknown 0xa5 token 0x%.2x", devc->token);
+ if (c == 0xa5 || c == 0xbb) {
+ /* Looks like a new command however. */
+ if (handle_packets)
+ process_mset(sdi);
+ devc->state = ST_INIT;
+ } else {
+ devc->buf[devc->buf_len++] = c;
+ if (devc->buf_len > BUF_SIZE) {
+ /* Shouldn't happen, ignore. */
+ devc->state = ST_INIT;
+ }
+ }
+ } else {
+ devc->buf[devc->buf_len++] = c;
+ if (devc->buf_len == len) {
+ if (handle_packets)
+ process_mset(sdi);
+ devc->state = ST_INIT;
+ } else if (devc->buf_len > BUF_SIZE) {
+ /* Shouldn't happen, ignore. */
+ devc->state = ST_INIT;
+ }
+ }
+ } else if (devc->state == ST_GET_LOG_HEADER) {
+ sr_dbg("log header: 0x%.2x", c);
+ if (devc->buf_len < 2)
+ devc->buf[devc->buf_len++] = c;
+ if (devc->buf_len == 2) {
+ sr_dbg("Device says it has %d bytes stored.",
+ ((devc->buf[0] << 8) + devc->buf[1]) - 100);
+ devc->buf_len = 0;
+ devc->state = ST_GET_LOG_RECORD_META;
+ }
+ } else if (devc->state == ST_GET_LOG_RECORD_META) {
+ sr_dbg("log meta: 0x%.2x", c);
+ if (c == RECORD_END) {
+ devc->state = ST_INIT;
+ /* Stop acquisition after transferring all stored
+ * records. Otherwise the frontend would have no
+ * way to tell where stored data ends and live
+ * measurements begin. */
+ sdi->driver->dev_acquisition_stop((struct sr_dev_inst *)sdi,
+ devc->cb_data);
+ } else if (c == RECORD_DATA) {
+ devc->buf_len = 0;
+ devc->state = ST_GET_LOG_RECORD_DATA;
+ } else {
+ /* RECORD_DBA/RECORD_DBC + 7 bytes of metadata */
+ devc->buf[devc->buf_len++] = c;
+ if (devc->buf_len < 8)
+ /* Keep filling up the record header. */
+ return;
+ if (devc->buf[0] == RECORD_DBA)
+ devc->cur_mqflags = SR_MQFLAG_SPL_FREQ_WEIGHT_A;
+ else if (devc->buf[0] == RECORD_DBC)
+ devc->cur_mqflags = SR_MQFLAG_SPL_FREQ_WEIGHT_C;
+ else {
+ /* Shouldn't happen. */
+ sr_dbg("Unknown record token 0x%.2x", c);
+ return;
+ }
+ packet.type = SR_DF_META;
+ packet.payload = &meta;
+ src = sr_config_new(SR_CONF_SAMPLE_INTERVAL,
+ g_variant_new_uint64(devc->buf[7] * 1000));
+ meta.config = g_slist_append(NULL, src);
+ sr_session_send(devc->cb_data, &packet);
+ g_free(src);
+ devc->buf_len = 0;
+ }
+ } else if (devc->state == ST_GET_LOG_RECORD_DATA) {
+ sr_dbg("log data: 0x%.2x", c);
+ if (c == RECORD_DBA || c == RECORD_DBC || c == RECORD_DATA || c == RECORD_END) {
+ /* Work around off-by-one bug in device firmware. This
+ * happens only on the last record, i.e. before RECORD_END */
+ if (devc->buf_len & 1)
+ devc->buf_len--;
+ /* Done with this set of samples */
+ send_data(sdi, devc->buf, devc->buf_len / 2);
+ devc->buf_len = 0;
+
+ /* Process this meta marker in the right state. */
+ devc->state = ST_GET_LOG_RECORD_META;
+ process_byte(sdi, c, handle_packets);
+ } else {
+ devc->buf[devc->buf_len++] = c;
+ if (devc->buf_len == SAMPLES_PER_PACKET * 2) {
+ send_data(sdi, devc->buf, devc->buf_len / 2);
+ devc->buf_len = 0;
+ }
+ }
+ }
+
+}
+
+SR_PRIV int cem_dt_885x_receive_data(int fd, int revents, void *cb_data)
+{
+ const struct sr_dev_inst *sdi;
+ struct dev_context *devc;
+ struct sr_serial_dev_inst *serial;
+ unsigned char c, cmd;
+
+ (void)fd;
+
+ if (!(sdi = cb_data))
return TRUE;
+ devc = sdi->priv;
+ serial = sdi->conn;
if (revents == G_IO_IN) {
- /* TODO */
+ if (serial_read(serial, &c, 1) != 1)
+ return TRUE;
+ process_byte(sdi, c, TRUE);
+
+ if (devc->enable_data_source_memory) {
+ if (devc->state == ST_GET_LOG_HEADER) {
+ /* Memory transfer started. */
+ devc->enable_data_source_memory = FALSE;
+ } else {
+ /* Tell device to start transferring from memory. */
+ cmd = CMD_TRANSFER_MEMORY;
+ serial_write(serial, &cmd, 1);
+ }
+ }
}
return TRUE;
}
+
+
+static int wait_for_token(const struct sr_dev_inst *sdi, int8_t *tokens, int timeout)
+{
+ struct dev_context *devc;
+ struct sr_serial_dev_inst *serial;
+ gint64 start_time;
+ int i;
+ unsigned char c;
+
+ serial = sdi->conn;
+ devc = sdi->priv;
+ devc->state = ST_INIT;
+ start_time = g_get_monotonic_time() / 1000;
+ while (TRUE) {
+ if (serial_read(serial, &c, 1) != 1)
+ /* Device might have gone away. */
+ return SR_ERR;
+ process_byte(sdi, c, FALSE);
+ if (devc->state != ST_INIT)
+ /* Wait for a whole packet to get processed. */
+ continue;
+ for (i = 0; tokens[i] != -1; i++) {
+ if (devc->token == tokens[i]) {
+ sr_spew("wait_for_token: got token 0x%.2x", devc->token);
+ return SR_OK;
+ }
+ }
+ if (timeout && g_get_monotonic_time() / 1000 - start_time > timeout)
+ return SR_ERR_TIMEOUT;
+ }
+
+ return SR_OK;
+}
+
+/* cmd is the command to send, tokens are the tokens that denote the state
+ * which the command affects. The first token is the desired state. */
+static int cem_dt_885x_toggle(const struct sr_dev_inst *sdi, uint8_t cmd,
+ int8_t *tokens, int timeout)
+{
+ struct dev_context *devc;
+ struct sr_serial_dev_inst *serial;
+
+ serial = sdi->conn;
+ devc = sdi->priv;
+
+ /* The device doesn't respond to commands very well. The
+ * only thing to do is wait for the token that will confirm
+ * whether the command worked or not, and resend if needed. */
+ while (TRUE) {
+ if (serial_write(serial, (const void *)&cmd, 1) != 1)
+ return SR_ERR;
+ if (wait_for_token(sdi, tokens, timeout) == SR_ERR)
+ return SR_ERR;
+ if (devc->token == tokens[0])
+ /* It worked. */
+ break;
+ }
+
+ return SR_OK;
+}
+
+SR_PRIV gboolean cem_dt_885x_recording_get(const struct sr_dev_inst *sdi,
+ int *state)
+{
+ struct dev_context *devc;
+ int8_t tokens[5];
+
+ devc = sdi->priv;
+ if (devc->recording == -1) {
+ /* Didn't pick up device state yet. */
+ tokens[0] = TOKEN_RECORDING_ON;
+ tokens[1] = TOKEN_RECORDING_OFF;
+ tokens[2] = -1;
+ if (wait_for_token(sdi, tokens, 510) != SR_OK)
+ return SR_ERR;
+ }
+ *state = devc->token == TOKEN_RECORDING_ON;
+
+ return SR_OK;
+}
+
+SR_PRIV int cem_dt_885x_recording_set(const struct sr_dev_inst *sdi,
+ gboolean state)
+{
+ struct dev_context *devc;
+ int ret;
+ int8_t tokens[5];
+
+ devc = sdi->priv;
+
+ /* The toggle below needs the desired state in first position. */
+ if (state) {
+ tokens[0] = TOKEN_RECORDING_ON;
+ tokens[1] = TOKEN_RECORDING_OFF;
+ } else {
+ tokens[0] = TOKEN_RECORDING_OFF;
+ tokens[1] = TOKEN_RECORDING_ON;
+ }
+ tokens[2] = -1;
+
+ if (devc->recording == -1) {
+ /* Didn't pick up device state yet. */
+ if (wait_for_token(sdi, tokens, 0) != SR_OK)
+ return SR_ERR;
+ if (devc->token == tokens[0])
+ /* Nothing to do. */
+ return SR_OK;
+ } else if (devc->recording == state)
+ /* Nothing to do. */
+ return SR_OK;
+
+ /* Recording state notifications are sent at 2Hz, so allow just over
+ * that, 510ms, for the state to come in. */
+ ret = cem_dt_885x_toggle(sdi, CMD_TOGGLE_RECORDING, tokens, 510);
+
+ return ret;
+}
+
+SR_PRIV int cem_dt_885x_weight_freq_get(const struct sr_dev_inst *sdi)
+{
+ struct dev_context *devc;
+ int cur_setting;
+ int8_t tokens[5];
+
+ devc = sdi->priv;
+
+ cur_setting = devc->cur_mqflags & (SR_MQFLAG_SPL_FREQ_WEIGHT_A | SR_MQFLAG_SPL_FREQ_WEIGHT_C);
+ if (cur_setting == 0) {
+ /* Didn't pick up device state yet. */
+ tokens[0] = TOKEN_WEIGHT_FREQ_A;
+ tokens[1] = TOKEN_WEIGHT_FREQ_C;
+ tokens[2] = -1;
+ if (wait_for_token(sdi, tokens, 0) != SR_OK)
+ return SR_ERR;
+ if (devc->token == TOKEN_WEIGHT_FREQ_A)
+ return SR_MQFLAG_SPL_FREQ_WEIGHT_A;
+ else
+ return SR_MQFLAG_SPL_FREQ_WEIGHT_C;
+ } else
+ return cur_setting;
+}
+
+SR_PRIV int cem_dt_885x_weight_freq_set(const struct sr_dev_inst *sdi, int freqw)
+{
+ struct dev_context *devc;
+ int cur_setting, ret;
+ int8_t tokens[5];
+
+ devc = sdi->priv;
+
+ cur_setting = devc->cur_mqflags & (SR_MQFLAG_SPL_FREQ_WEIGHT_A | SR_MQFLAG_SPL_FREQ_WEIGHT_C);
+ if (cur_setting == freqw)
+ /* Already set to this frequency weighting. */
+ return SR_OK;
+
+ /* The toggle below needs the desired state in first position. */
+ if (freqw == SR_MQFLAG_SPL_FREQ_WEIGHT_A) {
+ tokens[0] = TOKEN_WEIGHT_FREQ_A;
+ tokens[1] = TOKEN_WEIGHT_FREQ_C;
+ } else {
+ tokens[0] = TOKEN_WEIGHT_FREQ_C;
+ tokens[1] = TOKEN_WEIGHT_FREQ_A;
+ }
+ tokens[2] = -1;
+
+ if (cur_setting == 0) {
+ /* Didn't pick up device state yet. */
+ if (wait_for_token(sdi, tokens, 0) != SR_OK)
+ return SR_ERR;
+ if (devc->token == tokens[0])
+ /* Nothing to do. */
+ return SR_OK;
+ }
+
+ /* 10ms timeout seems to work best for this. */
+ ret = cem_dt_885x_toggle(sdi, CMD_TOGGLE_WEIGHT_FREQ, tokens, 10);
+
+ return ret;
+}
+
+SR_PRIV int cem_dt_885x_weight_time_get(const struct sr_dev_inst *sdi)
+{
+ struct dev_context *devc;
+ int cur_setting;
+ int8_t tokens[5];
+
+ devc = sdi->priv;
+
+ cur_setting = devc->cur_mqflags & (SR_MQFLAG_SPL_TIME_WEIGHT_F | SR_MQFLAG_SPL_TIME_WEIGHT_S);
+ if (cur_setting == 0) {
+ /* Didn't pick up device state yet. */
+ tokens[0] = TOKEN_WEIGHT_TIME_FAST;
+ tokens[1] = TOKEN_WEIGHT_TIME_SLOW;
+ tokens[2] = -1;
+ if (wait_for_token(sdi, tokens, 0) != SR_OK)
+ return SR_ERR;
+ if (devc->token == TOKEN_WEIGHT_TIME_FAST)
+ return SR_MQFLAG_SPL_TIME_WEIGHT_F;
+ else
+ return SR_MQFLAG_SPL_TIME_WEIGHT_S;
+ } else
+ return cur_setting;
+}
+
+SR_PRIV int cem_dt_885x_weight_time_set(const struct sr_dev_inst *sdi, int timew)
+{
+ struct dev_context *devc;
+ int cur_setting, ret;
+ int8_t tokens[5];
+
+ devc = sdi->priv;
+
+ cur_setting = devc->cur_mqflags & (SR_MQFLAG_SPL_TIME_WEIGHT_F | SR_MQFLAG_SPL_TIME_WEIGHT_S);
+ if (cur_setting == timew)
+ /* Already set to this time weighting. */
+ return SR_OK;
+
+ /* The toggle below needs the desired state in first position. */
+ if (timew == SR_MQFLAG_SPL_TIME_WEIGHT_F) {
+ tokens[0] = TOKEN_WEIGHT_TIME_FAST;
+ tokens[1] = TOKEN_WEIGHT_TIME_SLOW;
+ } else {
+ tokens[0] = TOKEN_WEIGHT_TIME_SLOW;
+ tokens[1] = TOKEN_WEIGHT_TIME_FAST;
+ }
+ tokens[2] = -1;
+
+ if (cur_setting == 0) {
+ /* Didn't pick up device state yet. */
+ if (wait_for_token(sdi, tokens, 0) != SR_OK)
+ return SR_ERR;
+ if (devc->token == tokens[0])
+ /* Nothing to do. */
+ return SR_OK;
+ }
+
+ /* 51ms timeout seems to work best for this. */
+ ret = cem_dt_885x_toggle(sdi, CMD_TOGGLE_WEIGHT_TIME, tokens, 51);
+
+ return ret;
+}
+
+SR_PRIV int cem_dt_885x_holdmode_get(const struct sr_dev_inst *sdi,
+ gboolean *holdmode)
+{
+ struct dev_context *devc;
+ int8_t tokens[5];
+
+ devc = sdi->priv;
+
+ if (devc->cur_mqflags == 0) {
+ tokens[0] = TOKEN_HOLD_MAX;
+ tokens[1] = TOKEN_HOLD_MIN;
+ tokens[2] = TOKEN_HOLD_NONE;
+ tokens[3] = -1;
+ if (wait_for_token(sdi, tokens, 0) != SR_OK)
+ return SR_ERR;
+ if (devc->token == TOKEN_HOLD_MAX)
+ devc->cur_mqflags = SR_MQFLAG_MAX;
+ else if (devc->token == TOKEN_HOLD_MIN)
+ devc->cur_mqflags = SR_MQFLAG_MIN;
+ }
+ *holdmode = devc->cur_mqflags & (SR_MQFLAG_MAX | SR_MQFLAG_MIN);
+
+ return SR_OK;
+}
+
+SR_PRIV int cem_dt_885x_holdmode_set(const struct sr_dev_inst *sdi, int holdmode)
+{
+ struct dev_context *devc;
+ int cur_setting, ret;
+ int8_t tokens[5];
+
+ devc = sdi->priv;
+
+ /* The toggle below needs the desired state in first position. */
+ if (holdmode == SR_MQFLAG_MAX) {
+ tokens[0] = TOKEN_HOLD_MAX;
+ tokens[1] = TOKEN_HOLD_MIN;
+ tokens[2] = TOKEN_HOLD_NONE;
+ } else if (holdmode == SR_MQFLAG_MIN) {
+ tokens[0] = TOKEN_HOLD_MIN;
+ tokens[1] = TOKEN_HOLD_MAX;
+ tokens[2] = TOKEN_HOLD_NONE;
+ } else {
+ tokens[0] = TOKEN_HOLD_NONE;
+ tokens[1] = TOKEN_HOLD_MAX;
+ tokens[2] = TOKEN_HOLD_MIN;
+ }
+ tokens[3] = -1;
+
+ if (devc->cur_mqflags == 0) {
+ /* Didn't pick up device state yet. */
+ if (wait_for_token(sdi, tokens, 0) != SR_OK)
+ return SR_ERR;
+ if (devc->token == tokens[0])
+ /* Nothing to do. */
+ return SR_OK;
+ } else {
+ cur_setting = devc->cur_mqflags & (SR_MQFLAG_MAX | SR_MQFLAG_MIN);
+ if (cur_setting == holdmode)
+ /* Already set correctly. */
+ return SR_OK;
+ }
+
+ /* 51ms timeout seems to work best for this. */
+ ret = cem_dt_885x_toggle(sdi, CMD_TOGGLE_HOLD_MAX_MIN, tokens, 51);
+
+ return ret;
+}
+
+SR_PRIV int cem_dt_885x_meas_range_get(const struct sr_dev_inst *sdi,
+ uint64_t *low, uint64_t *high)
+{
+ struct dev_context *devc;
+ int8_t tokens[5];
+
+ devc = sdi->priv;
+ if (devc->cur_meas_range == 0) {
+ tokens[0] = TOKEN_MEAS_RANGE_30_130;
+ tokens[1] = TOKEN_MEAS_RANGE_30_80;
+ tokens[2] = TOKEN_MEAS_RANGE_50_100;
+ tokens[3] = TOKEN_MEAS_RANGE_80_130;
+ tokens[4] = -1;
+ if (wait_for_token(sdi, tokens, 0) != SR_OK)
+ return SR_ERR;
+ devc->cur_meas_range = devc->token;
+ }
+
+ switch (devc->cur_meas_range) {
+ case TOKEN_MEAS_RANGE_30_130:
+ *low = 30;
+ *high = 130;
+ break;
+ case TOKEN_MEAS_RANGE_30_80:
+ *low = 30;
+ *high = 80;
+ break;
+ case TOKEN_MEAS_RANGE_50_100:
+ *low = 50;
+ *high = 100;
+ break;
+ case TOKEN_MEAS_RANGE_80_130:
+ *low = 80;
+ *high = 130;
+ break;
+ default:
+ return SR_ERR;
+ }
+
+ return SR_OK;
+}
+
+SR_PRIV int cem_dt_885x_meas_range_set(const struct sr_dev_inst *sdi,
+ uint64_t low, uint64_t high)
+{
+ struct dev_context *devc;
+ int ret;
+ int8_t token, tokens[6];
+
+ devc = sdi->priv;
+ if (low == 30 && high == 130)
+ token = TOKEN_MEAS_RANGE_30_130;
+ else if (low == 30 && high == 80)
+ token = TOKEN_MEAS_RANGE_30_80;
+ else if (low == 50 && high == 100)
+ token = TOKEN_MEAS_RANGE_50_100;
+ else if (low == 80 && high == 130)
+ token = TOKEN_MEAS_RANGE_80_130;
+ else
+ return SR_ERR;
+
+ sr_dbg("want 0x%.2x", token);
+ /* The toggle below needs the desired state in first position. */
+ tokens[0] = token;
+ tokens[1] = TOKEN_MEAS_RANGE_30_130;
+ tokens[2] = TOKEN_MEAS_RANGE_30_80;
+ tokens[3] = TOKEN_MEAS_RANGE_50_100;
+ tokens[4] = TOKEN_MEAS_RANGE_80_130;
+ tokens[5] = -1;
+
+ if (devc->cur_meas_range == 0) {
+ /* 110ms should be enough for two of these announcements */
+ if (wait_for_token(sdi, tokens, 110) != SR_OK)
+ return SR_ERR;
+ devc->cur_meas_range = devc->token;
+ }
+
+ if (devc->cur_meas_range == token)
+ /* Already set to this range. */
+ return SR_OK;
+
+ /* For measurement range, it works best to ignore announcements of the
+ * current setting and keep resending the toggle quickly. */
+ tokens[1] = -1;
+ ret = cem_dt_885x_toggle(sdi, CMD_TOGGLE_MEAS_RANGE, tokens, 11);
+
+ return ret;
+}
+
+SR_PRIV int cem_dt_885x_power_off(const struct sr_dev_inst *sdi)
+{
+ struct sr_serial_dev_inst *serial;
+ char c, cmd;
+
+ serial = sdi->conn;
+
+ /* Reopen the port in non-blocking mode, so we can properly
+ * detect when the device stops communicating. */
+ serial_close(serial);
+ if (serial_open(serial, SERIAL_RDWR | SERIAL_NONBLOCK) != SR_OK)
+ return SR_ERR;
+
+ cmd = CMD_TOGGLE_POWER_OFF;
+ while (TRUE) {
+ serial_flush(serial);
+ if (serial_write(serial, (const void *)&cmd, 1) != 1)
+ return SR_ERR;
+ /* It never takes more than 23ms for the next token to arrive. */
+ g_usleep(25 * 1000);
+ if (serial_read(serial, &c, 1) != 1)
+ /* Device is no longer responding. Good! */
+ break;
+ }
+
+ /* In case the user manually turns on the device again, reset
+ * the port back to blocking. */
+ serial_close(serial);
+ serial_open(serial, SERIAL_RDWR);
+
+ return SR_OK;
+}
projects / libsigrok.git / blobdiff