atten-pps3xxx: Full support for the PPS3203T-3S.

[libsigrok.git] / hardware / atten-pps3xxx / protocol.c

diff --git a/hardware/atten-pps3xxx/protocol.c b/hardware/atten-pps3xxx/protocol.c
index e7a458477959b1ac0764ede9aff0534086ab8a9d..d4ba6f9a5f48bcdd299dd8f6f887500a94732e82 100644 (file)
--- a/hardware/atten-pps3xxx/protocol.c
+++ b/hardware/atten-pps3xxx/protocol.c
@@ -17,12 +17,121 @@
  * 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.probes = sdi->probes;
+       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)
+                       packet[15] |= 1 << i;
+       }
+       packet[18] = devc->over_current_protection ? 1 : 0;
+       packet[19] = devc->channel_mode;
+       /* Checksum. */
+       value = 0;
+       for (i = 0; i < PACKET_SIZE - 1; i++)
+               value += packet[i];
+       packet[i] = value & 0xff;
+       send_packet(sdi, packet);
+
+}
+
 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;
 
@@ -32,9 +141,24 @@ SR_PRIV int atten_pps3xxx_receive_data(int fd, int revents, void *cb_data)
        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(serial);
+                               packet.type = SR_DF_END;
+                               sr_session_send(sdi, &packet);
+                       }
+               }
        }
 
        return TRUE;
 }
+