#include "protocol.h"
-SR_PRIV int center_3xx_receive_data(int fd, int revents, void *cb_data)
+struct center_info {
+ float temp[4];
+ gboolean rec, std, max, min, maxmin, t1t2, rel, hold, lowbat, celsius;
+ gboolean memfull, autooff;
+ gboolean mode_std, mode_rel, mode_max, mode_min, mode_maxmin;
+};
+
+static int center_send(struct sr_serial_dev_inst *serial, const char *cmd)
{
- (void)fd;
+ int ret;
+
+ if ((ret = serial_write(serial, cmd, strlen(cmd))) < 0) {
+ sr_err("Error sending '%s' command: %d.", cmd, ret);
+ return SR_ERR;
+ }
+
+ return SR_OK;
+}
+
+SR_PRIV gboolean center_3xx_packet_valid(const uint8_t *buf)
+{
+ return (buf[0] == 0x02 && buf[44] == 0x03);
+}
+
+static void log_packet(const uint8_t *buf, int idx)
+{
+ int i;
+ GString *s;
+
+ s = g_string_sized_new(100);
+ g_string_printf(s, "Packet: ");
+ for (i = 0; i < center_devs[idx].packet_size; i++)
+ g_string_append_printf(s, "%02x ", buf[i]);
+ sr_spew("%s", s->str);
+ g_string_free(s, TRUE);
+}
+
+static int packet_parse(const uint8_t *buf, int idx, struct center_info *info)
+{
+ int i;
+ uint16_t temp_u16;
+
+ log_packet(buf, idx);
+
+ /* Byte 0: Always 0x02. */
+
+ /* Byte 1: Various status bits. */
+ info->rec = (buf[1] & (1 << 0)) != 0;
+ info->mode_std = (((buf[1] >> 1) & 0x3) == 0);
+ info->mode_max = (((buf[1] >> 1) & 0x3) == 1);
+ info->mode_min = (((buf[1] >> 1) & 0x3) == 2);
+ info->mode_maxmin = (((buf[1] >> 1) & 0x3) == 3);
+ /* TODO: Rel. Not available on all models. */
+ info->t1t2 = (buf[1] & (1 << 3)) != 0;
+ info->rel = (buf[1] & (1 << 4)) != 0;
+ info->hold = (buf[1] & (1 << 5)) != 0;
+ info->lowbat = (buf[1] & (1 << 6)) != 0;
+ info->celsius = (buf[1] & (1 << 7)) != 0;
+
+ /* Byte 2: Further status bits. */
+ info->memfull = (buf[2] & (1 << 0)) != 0;
+ info->autooff = (buf[2] & (1 << 7)) != 0;
+
+ /* Byte 7+8/9+10/11+12/13+14: channel T1/T2/T3/T4 temperature. */
+ for (i = 0; i < 4; i++) {
+ temp_u16 = buf[8 + (i * 2)];
+ temp_u16 |= ((uint16_t)buf[7 + (i * 2)] << 8);
+ info->temp[i] = (float)temp_u16;
+ }
+
+ /* Byte 43: Specifies whether we need to divide the value(s) by 10. */
+ for (i = 0; i < 4; i++) {
+ /* Bit = 0: Divide by 10. Bit = 1: Don't divide by 10. */
+ if ((buf[43] & (1 << i)) == 0)
+ info->temp[i] /= 10;
+ }
+
+ /* Bytes 39-42: Overflow/overlimit bits, depending on mode. */
+ for (i = 0; i < 4; i++) {
+ if (info->mode_std && ((buf[39] & (1 << i)) != 0))
+ info->temp[i] = INFINITY;
+ /* TODO: Rel. Not available on all models. */
+ // if (info->mode_rel && ((buf[40] & (1 << i)) != 0))
+ // info->temp[i] = INFINITY;
+ if (info->mode_max && ((buf[41] & (1 << i)) != 0))
+ info->temp[i] = INFINITY;
+ if (info->mode_min && ((buf[42] & (1 << i)) != 0))
+ info->temp[i] = INFINITY;
+ /* TODO: Minmax? */
+ }
+
+ /* Byte 44: Always 0x03. */
+
+ return SR_OK;
+}
+
+static int handle_packet(const uint8_t *buf, struct sr_dev_inst *sdi, int idx)
+{
+ struct sr_datafeed_packet packet;
+ struct sr_datafeed_analog analog;
+ struct dev_context *devc;
+ struct center_info info;
+ GSList *l;
+ int i, ret;
+
+ devc = sdi->priv;
- const struct sr_dev_inst *sdi;
+ memset(&analog, 0, sizeof(struct sr_datafeed_analog));
+ memset(&info, 0, sizeof(struct center_info));
+
+ ret = packet_parse(buf, idx, &info);
+ if (ret < 0) {
+ sr_err("Failed to parse packet.");
+ return SR_ERR;
+ }
+
+ /* Common values for all 4 channels. */
+ packet.type = SR_DF_ANALOG;
+ packet.payload = &analog;
+ analog.mq = SR_MQ_TEMPERATURE;
+ analog.unit = (info.celsius) ? SR_UNIT_CELSIUS : SR_UNIT_FAHRENHEIT;
+ analog.num_samples = 1;
+
+ /* Send the values for T1 - T4. */
+ for (i = 0; i < 4; i++) {
+ l = NULL;
+ l = g_slist_append(l, g_slist_nth_data(sdi->channels, i));
+ analog.channels = l;
+ analog.data = &(info.temp[i]);
+ sr_session_send(devc->cb_data, &packet);
+ g_slist_free(l);
+ }
+
+ devc->num_samples++;
+
+ return SR_OK;
+}
+
+/* Return TRUE if a full packet was parsed, FALSE otherwise. */
+static gboolean handle_new_data(struct sr_dev_inst *sdi, int idx)
+{
+ struct dev_context *devc;
+ struct sr_serial_dev_inst *serial;
+ int len, i, offset = 0, ret = FALSE;
+
+ devc = sdi->priv;
+ serial = sdi->conn;
+
+ /* Try to get as much data as the buffer can hold. */
+ len = SERIAL_BUFSIZE - devc->buflen;
+ len = serial_read(serial, devc->buf + devc->buflen, len);
+ if (len < 1) {
+ sr_err("Serial port read error: %d.", len);
+ return FALSE;
+ }
+
+ devc->buflen += len;
+
+ /* Now look for packets in that data. */
+ while ((devc->buflen - offset) >= center_devs[idx].packet_size) {
+ if (center_devs[idx].packet_valid(devc->buf + offset)) {
+ handle_packet(devc->buf + offset, sdi, idx);
+ offset += center_devs[idx].packet_size;
+ ret = TRUE;
+ } else {
+ offset++;
+ }
+ }
+
+ /* If we have any data left, move it to the beginning of our buffer. */
+ for (i = 0; i < devc->buflen - offset; i++)
+ devc->buf[i] = devc->buf[offset + i];
+ devc->buflen -= offset;
+
+ return ret;
+}
+
+static int receive_data(int fd, int revents, int idx, void *cb_data)
+{
+ struct sr_dev_inst *sdi;
struct dev_context *devc;
+ int64_t t;
+ static gboolean request_new_packet = TRUE;
+ struct sr_serial_dev_inst *serial;
+
+ (void)fd;
if (!(sdi = cb_data))
return TRUE;
if (!(devc = sdi->priv))
return TRUE;
+ serial = sdi->conn;
+
if (revents == G_IO_IN) {
- /* TODO */
+ /* New data arrived. */
+ request_new_packet = handle_new_data(sdi, idx);
+ } else {
+ /*
+ * Timeout. Send "A" to request a packet, but then don't send
+ * further "A" commands until we received a full packet first.
+ */
+ if (request_new_packet) {
+ center_send(serial, "A");
+ request_new_packet = FALSE;
+ }
+ }
+
+ if (devc->limit_samples && devc->num_samples >= devc->limit_samples) {
+ sr_info("Requested number of samples reached.");
+ sdi->driver->dev_acquisition_stop(sdi, cb_data);
+ return TRUE;
+ }
+
+ if (devc->limit_msec) {
+ t = (g_get_monotonic_time() - devc->starttime) / 1000;
+ if (t > (int64_t)devc->limit_msec) {
+ sr_info("Requested time limit reached.");
+ sdi->driver->dev_acquisition_stop(sdi, cb_data);
+ return TRUE;
+ }
}
return TRUE;
}
+
+#define RECEIVE_DATA(ID_UPPER) \
+SR_PRIV int receive_data_##ID_UPPER(int fd, int revents, void *cb_data) { \
+ return receive_data(fd, revents, ID_UPPER, cb_data); }
+
+/* Driver-specific receive_data() wrappers */
+RECEIVE_DATA(CENTER_309)
+RECEIVE_DATA(VOLTCRAFT_K204)
projects / libsigrok.git / blobdiff