1 files changed, 9 insertions, 4 deletions
diff --git a/02-usart/src/arch/stm32l4xxx/peripherals/usart.c b/02-usart/src/arch/stm32l4xxx/peripherals/usart.c
index d37eee2..7309b48 100644
--- a/02-usart/src/arch/stm32l4xxx/peripherals/usart.c
+++ b/02-usart/src/arch/stm32l4xxx/peripherals/usart.c
@@ -97,9 +97,8 @@ void usart_enable_dma(__IO usart_t* usart, usart_enable_t enabled)
   };
 }
 
-void usart_printf(__IO usart_t* usart, const char* fmt, ...)
+void usart_vprintf(__IO usart_t* usart, const char* fmt, va_list l)
 {
-  va_list l;
   union {
     void* ptr;
     char* str;
@@ -107,8 +106,6 @@ void usart_printf(__IO usart_t* usart, const char* fmt, ...)
   } b;
   char buf[128];
 
-  va_start(l, fmt);
-
   while (*fmt != 0) {
     if (*fmt == '%') {
       switch (*(++fmt)) {
@@ -145,3 +142,11 @@ void usart_printf(__IO usart_t* usart, const char* fmt, ...)
 end:
   va_end(l);
 }
+
+void usart_printf(__IO usart_t* usart, const char* fmt, ...)
+{
+  va_list l;
+  va_start(l, fmt);
+
+  usart_vprintf(usart, fmt, l);
+}