hp-3478a: use symbolic name for status register bit field

The hp_3478a_receive_data() routine uses SPOLL to only communicate
measurement data when they have become available. Use a symbolic name
for the tested bitfield for consistency with other driver locations
and for improved readability.

diff --git a/src/hardware/hp-3478a/protocol.c b/src/hardware/hp-3478a/protocol.c
index 2e9130b022a9ab01832701ebdae41eb0c1533c47..ed8878bec5a25c8560950713b0ba21caf942d740 100644 (file)
--- a/src/hardware/hp-3478a/protocol.c
+++ b/src/hardware/hp-3478a/protocol.c
@@ -489,7 +489,7 @@ SR_PRIV int hp_3478a_receive_data(int fd, int revents, void *cb_data)
         */
        if (sr_scpi_gpib_spoll(scpi, &status_register) != SR_OK)
                return FALSE;
-       if (!(((uint8_t)status_register) & 0x01))
+       if (!(((uint8_t)status_register) & SRQ_BUS_AVAIL))
                return TRUE;
 
        /* Get a reading from the DMM. */