atten-pps3xxx: Fix serial port timeout.

diff --git a/src/hardware/atten-pps3xxx/api.c b/src/hardware/atten-pps3xxx/api.c
index 24b392ee75a4de74770a2cc12a6dbde711fe9908..68dec6b08d3e15cad1d84f340eaf83b6659ef357 100644 (file)
--- a/src/hardware/atten-pps3xxx/api.c
+++ b/src/hardware/atten-pps3xxx/api.c
@@ -92,6 +92,7 @@ static GSList *scan(GSList *options, int modelid)
        struct sr_serial_dev_inst *serial;
        GSList *l, *devices;
        struct pps_model *model;
+       float byte_delay_ms;
        uint8_t packet[PACKET_SIZE];
        unsigned int i;
        int ret;
@@ -126,11 +127,20 @@ static GSList *scan(GSList *options, int modelid)
                return NULL;
        serial_flush(serial);
 
-       /* This is how the vendor software channels for hardware. */
+       /* How long it takes for a byte to transfer over the serial port. */
+       if (sp_get_port_transport(serial->data) == SP_TRANSPORT_NATIVE)
+               /* 11 bits at 9600 bps. */
+               byte_delay_ms = 1.15;
+       else
+               /* Emulated serial over USB or bluetooth is just enqueueing. */
+               byte_delay_ms = 0;
+
+       /* This is how the vendor software scans for hardware. */
        memset(packet, 0, PACKET_SIZE);
        packet[0] = 0xaa;
        packet[1] = 0xaa;
-       if (serial_write_blocking(serial, packet, PACKET_SIZE, 0) < PACKET_SIZE) {
+       if (serial_write_blocking(serial, packet, PACKET_SIZE,
+                       byte_delay_ms * PACKET_SIZE + 1) < PACKET_SIZE) {
                sr_err("Unable to write while probing for hardware.");
                return NULL;
        }
@@ -178,6 +188,7 @@ static GSList *scan(GSList *options, int modelid)
        devc = g_malloc0(sizeof(struct dev_context));
        devc->model = model;
        devc->config = g_malloc0(sizeof(struct per_channel_config) * model->num_channels);
+       devc->byte_delay_ms = byte_delay_ms;
        sdi->priv = devc;
        drvc->instances = g_slist_append(drvc->instances, sdi);
        devices = g_slist_append(devices, sdi);

diff --git a/src/hardware/atten-pps3xxx/protocol.c b/src/hardware/atten-pps3xxx/protocol.c
index 0db7e232ad5fe8b880af69dfa44ce64e6079b707..98838b65bbe05a2ba00b4018f06ded7a8f5a3019 100644 (file)
--- a/src/hardware/atten-pps3xxx/protocol.c
+++ b/src/hardware/atten-pps3xxx/protocol.c
@@ -83,10 +83,13 @@ static void handle_packet(const struct sr_dev_inst *sdi)
 
 SR_PRIV void send_packet(const struct sr_dev_inst *sdi, uint8_t *packet)
 {
+       struct dev_context *devc;
        struct sr_serial_dev_inst *serial;
 
+       devc = sdi->priv;
        serial = sdi->conn;
-       if (serial_write_blocking(serial, packet, PACKET_SIZE, 0) < PACKET_SIZE)
+       if (serial_write_blocking(serial, packet, PACKET_SIZE,
+                       devc->byte_delay_ms * PACKET_SIZE + 1) < PACKET_SIZE)
                sr_dbg("Failed to send packet.");
        dump_packet("sent", packet);
 }

diff --git a/src/hardware/atten-pps3xxx/protocol.h b/src/hardware/atten-pps3xxx/protocol.h
index 1441305d9730c0d28552f0147615c3b63c6c041a..2ad9e857b3f3d377df2b81e926fabda060026e5d 100644 (file)
--- a/src/hardware/atten-pps3xxx/protocol.h
+++ b/src/hardware/atten-pps3xxx/protocol.h
@@ -82,6 +82,7 @@ struct dev_context {
        /* Operational state */
        gboolean config_dirty;
        struct per_channel_config *config;
+       float byte_delay_ms;
        /* Received from device. */
        int channel_mode;
        gboolean over_current_protection;