sys/stdio_uart: add pseudomodule stdio_clear_rx

RIOT-OS · Nov 26, 2024 · 059bb79 · 059bb79
1 parent 87ae06a
commit 059bb79
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Showing 4 changed files with 21 additions and 0 deletions.
diff --git a/makefiles/pseudomodules.inc.mk b/makefiles/pseudomodules.inc.mk
@@ -484,6 +484,7 @@ PSEUDOMODULES += socket_zep_hello
 PSEUDOMODULES += soft_uart_modecfg
 PSEUDOMODULES += stdin
 PSEUDOMODULES += stdio_available
+PSEUDOMODULES += stdio_clear_rx
 PSEUDOMODULES += stdio_cdc_acm
 PSEUDOMODULES += stdio_dispatch
 PSEUDOMODULES += stdio_ethos

diff --git a/makefiles/stdio.inc.mk b/makefiles/stdio.inc.mk
@@ -75,10 +75,15 @@ ifneq (,$(filter stdin,$(USEMODULE)))
   endif
 endif
 
+ifneq (,$(filter stdio_clear_rx,$(USEMODULE)))
+  USEMODULE += stdin
+endif
+
 ifneq (,$(filter stdio_uart_rx,$(USEMODULE)))
   USEMODULE += isrpipe
   USEMODULE += stdio_uart
   USEMODULE += stdio_available
+  USEMODULE += stdio_clear_rx
 endif
 
 ifneq (,$(filter stdio_uart,$(USEMODULE)))

diff --git a/sys/include/stdio_base.h b/sys/include/stdio_base.h
@@ -102,6 +102,16 @@ void stdio_init(void);
 int stdio_available(void);
 #endif
 
+#if IS_USED(MODULE_STDIO_CLEAR_RX) || DOXYGEN
+/**
+ * @brief   Clear the input buffer
+ *
+ * @warning This function is only available if the implementation supports
+ *          it and the @c stdio_clear_rx module is enabled.
+ */
+void stdio_clear_rx(void);
+#endif
+
 /**
  * @brief read @p len bytes from stdio uart into @p buffer
  *

diff --git a/sys/stdio/stdio.c b/sys/stdio/stdio.c
@@ -78,3 +78,8 @@ int stdio_available(void)
     return tsrb_avail(&stdin_isrpipe.tsrb);
 }
 #endif
+
+void stdio_clear_rx(void)
+{
+    tsrb_clear(&stdin_isrpipe.tsrb);
+}