hp-3478a: Check via GPIB serial poll if new data is available.

[libsigrok.git] / src / scpi / scpi_libgpib.c

diff --git a/src/scpi/scpi_libgpib.c b/src/scpi/scpi_libgpib.c
index 2f3256be948e2eae404d02cda0e38b4391bab465..8f200e7d964ab247c41d727c56d0a43e8612bb99 100644 (file)
--- a/src/scpi/scpi_libgpib.c
+++ b/src/scpi/scpi_libgpib.c
@@ -155,6 +155,22 @@ static void scpi_gpib_free(void *priv)
        g_free(gscpi->name);
 }
 
+SR_PRIV int sr_scpi_gpib_spoll(struct sr_scpi_dev_inst *scpi, char *buf)
+{
+       struct scpi_gpib *gscpi = scpi->priv;
+
+       ibrsp(gscpi->descriptor, buf);
+
+       if (ibsta & ERR) {
+               sr_err("Error while serial polling: iberr = %s.",
+                       gpib_error_string(iberr));
+               return SR_ERR;
+       }
+       sr_spew("Successful serial poll: 0x%x", (uint8_t)buf[0]);
+
+       return SR_OK;
+}
+
 SR_PRIV const struct sr_scpi_dev_inst scpi_libgpib_dev = {
        .name = "GPIB",
        .prefix = "libgpib",