diff --git a/dap.c b/dap.c
index fb98cd6..a85d1bc 100644
--- a/dap.c
+++ b/dap.c
@@ -742,6 +742,12 @@ void dap_resp_set_byte(int index, uint8_t value)
     dap_resp_buf[index] = value;
 }
 
+//-----------------------------------------------------------------------------
+bool dap_is_buf_error(void)
+{
+  return dap_buf_error;
+}
+
 //-----------------------------------------------------------------------------
 static void dap_info(void)
 {
diff --git a/dap.h b/dap.h
index d5ee2e3..2e8429d 100644
--- a/dap.h
+++ b/dap.h
@@ -35,6 +35,13 @@
 
 /*- Prototypes --------------------------------------------------------------*/
 void dap_init(void);
+uint8_t dap_req_get_byte(void);
+uint16_t dap_req_get_half(void);
+uint32_t dap_req_get_word(void);
+void dap_resp_add_byte(uint8_t value);
+void dap_resp_add_word(uint32_t value);
+void dap_resp_set_byte(int index, uint8_t value);
+bool dap_is_buf_error(void);
 bool dap_filter_request(uint8_t *req);
 int dap_process_request(uint8_t *req, int req_size, uint8_t *resp, int resp_size);
 void dap_clock_test(int delay);