* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
+#include <string.h>
+#include <errno.h>
#include "protocol.h"
+static void dump_packet(char *msg, uint8_t *packet)
+{
+ int i;
+ char str[128];
+
+ str[0] = 0;
+ for (i = 0; i < PACKET_SIZE; i++)
+ sprintf(str + strlen(str), "%.2x ", packet[i]);
+ sr_dbg("%s: %s", msg, str);
+
+}
+
+static void handle_packet(const struct sr_dev_inst *sdi)
+{
+ struct dev_context *devc;
+ struct sr_datafeed_packet packet;
+ struct sr_datafeed_analog analog;
+ float value, data[MAX_CHANNELS];
+ int offset, i;
+
+ devc = sdi->priv;
+ dump_packet("received", devc->packet);
+ packet.type = SR_DF_ANALOG;
+ packet.payload = &analog;
+ analog.channels = sdi->channels;
+ analog.num_samples = 1;
+
+ analog.mq = SR_MQ_VOLTAGE;
+ analog.unit = SR_UNIT_VOLT;
+ analog.mqflags = SR_MQFLAG_DC;
+ analog.data = data;
+ for (i = 0; i < devc->model->num_channels; i++) {
+ offset = 2 + i * 4;
+ value = ((devc->packet[offset] << 8) + devc->packet[offset + 1]) / 100.0;
+ analog.data[i] = value;
+ devc->config[i].output_voltage_last = value;
+ }
+ sr_session_send(sdi, &packet);
+
+ analog.mq = SR_MQ_CURRENT;
+ analog.unit = SR_UNIT_AMPERE;
+ analog.mqflags = 0;
+ analog.data = data;
+ for (i = 0; i < devc->model->num_channels; i++) {
+ offset = 4 + i * 4;
+ value = ((devc->packet[offset] << 8) + devc->packet[offset + 1]) / 1000.0;
+ analog.data[i] = value;
+ devc->config[i].output_current_last = value;
+ }
+ sr_session_send(sdi, &packet);
+
+ for (i = 0; i < devc->model->num_channels; i++)
+ devc->config[i].output_enabled = (devc->packet[15] & (1 << i)) ? TRUE : FALSE;
+
+ devc->over_current_protection = devc->packet[18] ? TRUE : FALSE;
+ if (devc->packet[19] < 3)
+ devc->channel_mode = devc->packet[19];
+
+}
+
+SR_PRIV void send_packet(const struct sr_dev_inst *sdi, uint8_t *packet)
+{
+ struct sr_serial_dev_inst *serial;
+
+ serial = sdi->conn;
+ if (serial_write(serial, packet, PACKET_SIZE) == -1)
+ sr_dbg("Failed to send packet: %s", strerror(errno));
+ dump_packet("sent", packet);
+}
+
+SR_PRIV void send_config(const struct sr_dev_inst *sdi)
+{
+ struct dev_context *devc;
+ uint8_t packet[PACKET_SIZE];
+ int value, offset, i;
+
+ devc = sdi->priv;
+ memset(packet, 0, PACKET_SIZE);
+ packet[0] = 0xaa;
+ packet[1] = 0x20;
+ packet[14] = 0x01;
+ packet[16] = 0x01;
+ for (i = 0; i < devc->model->num_channels; i++) {
+ offset = 2 + i * 4;
+ value = devc->config[i].output_voltage_max * 100;
+ packet[offset] = (value >> 8) & 0xff;
+ packet[offset + 1] = value & 0xff;
+ value = devc->config[i].output_current_max * 1000;
+ packet[offset + 2] = (value >> 8) & 0xff;
+ packet[offset + 3] = value & 0xff;
+ if (devc->config[i].output_enabled_set)
+ packet[15] |= 1 << i;
+ }
+ packet[18] = devc->over_current_protection_set ? 1 : 0;
+ packet[19] = devc->channel_mode_set;
+ /* Checksum. */
+ value = 0;
+ for (i = 0; i < PACKET_SIZE - 1; i++)
+ value += packet[i];
+ packet[i] = value & 0xff;
+ send_packet(sdi, packet);
+ devc->config_dirty = FALSE;
+
+}
+
SR_PRIV int atten_pps3xxx_receive_data(int fd, int revents, void *cb_data)
{
- const struct sr_dev_inst *sdi;
struct dev_context *devc;
+ const struct sr_dev_inst *sdi;
+ struct sr_serial_dev_inst *serial;
+ struct sr_datafeed_packet packet;
+ unsigned char c;
(void)fd;
if (!(devc = sdi->priv))
return TRUE;
+ serial = sdi->conn;
if (revents == G_IO_IN) {
- /* TODO */
+ if (serial_read_nonblocking(serial, &c, 1) < 0)
+ return TRUE;
+ devc->packet[devc->packet_size++] = c;
+ if (devc->packet_size == PACKET_SIZE) {
+ handle_packet(sdi);
+ devc->packet_size = 0;
+ if (devc->acquisition_running)
+ send_config(sdi);
+ else {
+ serial_source_remove(sdi->session, serial);
+ packet.type = SR_DF_END;
+ sr_session_send(sdi, &packet);
+ }
+ }
}
return TRUE;
}
+