diff --git a/src/platforms/hosted/ftdi_bmp.c b/src/platforms/hosted/ftdi_bmp.c
index 5ea2e91d..d5073d04 100644
--- a/src/platforms/hosted/ftdi_bmp.c
+++ b/src/platforms/hosted/ftdi_bmp.c
@@ -443,6 +443,7 @@ bool libftdi_srst_get_val(void)
 
 void libftdi_buffer_flush(void)
 {
+	DEBUG_WIRE("Flush\n");
 #if defined(USE_USB_VERSION_BIT)
 static struct ftdi_transfer_control *tc_write = NULL;
     if (tc_write)
@@ -458,6 +459,13 @@ static struct ftdi_transfer_control *tc_write = NULL;
 int libftdi_buffer_write(const uint8_t *data, int size)
 {
 	if((bufptr + size) / BUF_SIZE > 0) libftdi_buffer_flush();
+	DEBUG_WIRE("Write %d bytes:", size);
+	for (int i = 0; i < size; i++) {
+		DEBUG_WIRE(" %02x", data[i]);
+		if (i && ((i & 0xf) == 0xf))
+			DEBUG_WIRE("\n\t");
+	}
+	DEBUG_WIRE("\n");
 	memcpy(outbuf + bufptr, data, size);
 	bufptr += size;
 	return size;
@@ -473,10 +481,18 @@ int libftdi_buffer_read(uint8_t *data, int size)
 	ftdi_transfer_data_done(tc);
 #else
 	int index = 0;
-	outbuf[bufptr++] = SEND_IMMEDIATE;
+	const uint8_t cmd[1] = {SEND_IMMEDIATE};
+	libftdi_buffer_write(cmd, 1);
 	libftdi_buffer_flush();
 	while((index += ftdi_read_data(ftdic, data + index, size-index)) != size);
 #endif
+	DEBUG_WIRE("Read  %d bytes:", size);
+	for (int i = 0; i < size; i++) {
+		DEBUG_WIRE(" %02x", data[i]);
+		if (i && ((i & 0xf) == 0xf))
+			DEBUG_WIRE("\n\t");
+	}
+	DEBUG_WIRE("\n");
 	return size;
 }