From 2352d3e310a73c3ddeb56c2cd13df43ec03ad79e Mon Sep 17 00:00:00 2001
From: sheltonyu <sheltonyu@163.com>
Date: Fri, 7 Apr 2023 14:55:53 +0800
Subject: [PATCH] [bsp/at32] fixed auto check error

---
 bsp/at32/libraries/rt_drivers/drv_gpio.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/bsp/at32/libraries/rt_drivers/drv_gpio.c b/bsp/at32/libraries/rt_drivers/drv_gpio.c
index 344ba77a95..1858bb5112 100644
--- a/bsp/at32/libraries/rt_drivers/drv_gpio.c
+++ b/bsp/at32/libraries/rt_drivers/drv_gpio.c
@@ -260,10 +260,10 @@ static void at32_pin_mode(rt_device_t dev, rt_base_t pin, rt_uint8_t mode)
 
 rt_inline rt_int32_t bit2bitno(rt_uint32_t bit)
 {
-    int i;
+    rt_int32_t i;
     for (i = 0; i < 32; i++)
     {
-        if ((0x01 << i) == bit)
+        if (((rt_uint32_t)0x01 << i) == bit)
         {
             return i;
         }