diff --git a/bsp/wch/driver/drv_pwm.c b/bsp/wch/driver/drv_pwm.c
index 2a91e59..e42942c 100644
--- a/bsp/wch/driver/drv_pwm.c
+++ b/bsp/wch/driver/drv_pwm.c
@@ -193,6 +193,7 @@ static int drv_pwm_channel_configure(struct mr_pwm *pwm, int channel, int state,
             GPIO_Init(pwm_data->ch1_port, &GPIO_InitStructure);
             TIM_OC1Init(pwm_data->instance, &TIM_OCInitStructure);
             TIM_OC1PreloadConfig(pwm_data->instance, state ? TIM_OCPreload_Enable : TIM_OCPreload_Disable);
+            TIM_SetCompare1(pwm_data->instance, 0);
             return MR_EOK;
         }
         case 2:
@@ -201,6 +202,7 @@ static int drv_pwm_channel_configure(struct mr_pwm *pwm, int channel, int state,
             GPIO_Init(pwm_data->ch2_port, &GPIO_InitStructure);
             TIM_OC2Init(pwm_data->instance, &TIM_OCInitStructure);
             TIM_OC2PreloadConfig(pwm_data->instance, state ? TIM_OCPreload_Enable : TIM_OCPreload_Disable);
+            TIM_SetCompare2(pwm_data->instance, 0);
             return MR_EOK;
         }
         case 3:
@@ -209,6 +211,7 @@ static int drv_pwm_channel_configure(struct mr_pwm *pwm, int channel, int state,
             GPIO_Init(pwm_data->ch3_port, &GPIO_InitStructure);
             TIM_OC3Init(pwm_data->instance, &TIM_OCInitStructure);
             TIM_OC3PreloadConfig(pwm_data->instance, state ? TIM_OCPreload_Enable : TIM_OCPreload_Disable);
+            TIM_SetCompare3(pwm_data->instance, 0);
             return MR_EOK;
         }
         case 4:
@@ -217,6 +220,7 @@ static int drv_pwm_channel_configure(struct mr_pwm *pwm, int channel, int state,
             GPIO_Init(pwm_data->ch4_port, &GPIO_InitStructure);
             TIM_OC4Init(pwm_data->instance, &TIM_OCInitStructure);
             TIM_OC4PreloadConfig(pwm_data->instance, state ? TIM_OCPreload_Enable : TIM_OCPreload_Disable);
+            TIM_SetCompare4(pwm_data->instance, 0);
             return MR_EOK;
         }
 
diff --git a/bsp/wch/driver/mr_board.c b/bsp/wch/driver/mr_board.c
new file mode 100644
index 0000000..e2c9b96
--- /dev/null
+++ b/bsp/wch/driver/mr_board.c
@@ -0,0 +1,19 @@
+/*
+ * @copyright (c) 2023-2024, MR Development Team
+ *
+ * @license SPDX-License-Identifier: Apache-2.0
+ *
+ * @date 2024-01-16    MacRsh       First version
+ */
+
+#include "mr_board.h"
+
+void mr_delay_us(uint32_t us)
+{
+    Delay_Us(us);
+}
+
+void mr_delay_ms(uint32_t ms)
+{
+    Delay_Ms(ms);
+}