1 files changed, 8 insertions, 4 deletions
diff --git a/controller/fw/src/serial.c b/controller/fw/src/serial.c
index 2d09f80..12df28a 100644
--- a/controller/fw/src/serial.c
+++ b/controller/fw/src/serial.c
@@ -165,18 +165,22 @@ int usart_flush(volatile struct usart_desc *us) {
     return 0;
 }
 
-int usart_printf(volatile struct usart_desc *us, char *fmt, ...) {
+int usart_printf(volatile struct usart_desc *us, const char *fmt, ...) {
     va_list va;
     va_start(va, fmt);
     tfp_format((void *)us, usart_putc_nonblocking_tpf, fmt, va);
     return usart_flush(us);
 }
 
-int usart_printf_blocking(volatile struct usart_desc *us, char *fmt, ...) {
-    va_list va;
-    va_start(va, fmt);
+int usart_printf_blocking_va(volatile struct usart_desc *us, const char *fmt, va_list va) {
     tfp_format((void *)us, usart_putc_blocking_tpf, fmt, va);
     usart_wait_chunk_free(us);
     return usart_flush(us);
 }
 
+int usart_printf_blocking(volatile struct usart_desc *us, const char *fmt, ...) {
+    va_list va;
+    va_start(va, fmt);
+    return usart_printf_blocking_va(us, fmt, va);
+}
+