rdtech-dps: Make it work in SmuView

[libsigrok.git] / src / hardware / rdtech-dps / api.c

diff --git a/src/hardware/rdtech-dps/api.c b/src/hardware/rdtech-dps/api.c
index 50025e6de3ca3eeb27e8a8948bd53f11df9a1267..fad31d629434ef5ae99f166305fd6ba1e7a5e5ec 100644 (file)
--- a/src/hardware/rdtech-dps/api.c
+++ b/src/hardware/rdtech-dps/api.c
@@ -298,11 +298,23 @@ static int dev_acquisition_start(const struct sr_dev_inst *sdi)
 {
        struct dev_context *devc;
        struct sr_modbus_dev_inst *modbus;
+       uint16_t registers[3];
        int ret;
 
        modbus = sdi->conn;
        devc = sdi->priv;
 
+       /* Prefill actual states */
+       g_mutex_lock(&devc->rw_mutex);
+       ret = rdtech_dps_read_holding_registers(modbus, REG_PROTECT, 3, registers);
+       g_mutex_unlock(&devc->rw_mutex);
+       if (ret != SR_OK)
+               return ret;
+       devc->actual_ovp_state = RB16(registers + 0) == STATE_OVP;
+       devc->actual_ocp_state = RB16(registers + 0) == STATE_OCP;
+       devc->actual_regulation_state = RB16(registers + 1);
+       devc->actual_output_state = RB16(registers + 2);
+
        if ((ret = sr_modbus_source_add(sdi->session, modbus, G_IO_IN, 10,
                        rdtech_dps_receive_data, (void *)sdi)) != SR_OK)
                return ret;