diff --git a/usersrc/encoder.c b/usersrc/encoder.c
index 8c0968f..02aee91 100644
--- a/usersrc/encoder.c
+++ b/usersrc/encoder.c
@@ -12,7 +12,6 @@ static encoder_t m_uarts[] = {
 
 void encoder_all_start(void)
 {
-    /* 不开启会导致程序无法启动，原因未知 */
     for (uint8_t i = 0; i < (sizeof(m_uarts) / sizeof(encoder_t)); i++)
     {
         HAL_TIM_Encoder_Start(m_uarts[i].tim_handler, m_uarts[i].tim_channel);