diff --git a/bsp/stm32/libraries/HAL_Drivers/drv_pwm.c b/bsp/stm32/libraries/HAL_Drivers/drv_pwm.c
index 6f1c123a56f9ad617e08bbd6e4d88737b4dd4047..a6835e682f6c5bdeb5a663ebe6380c6e712ea477 100644
--- a/bsp/stm32/libraries/HAL_Drivers/drv_pwm.c
+++ b/bsp/stm32/libraries/HAL_Drivers/drv_pwm.c
@@ -415,13 +415,13 @@ static void pwm_get_channel(void)
     stm32_pwm_obj[PWM1_INDEX].channel |= 1 << 0;
 #endif
 #ifdef BSP_USING_PWM1_CH2
-    stm32_pwm_obj[PWM1_INDEX].channel |= 1 << 2;
+    stm32_pwm_obj[PWM1_INDEX].channel |= 1 << 1;
 #endif
 #ifdef BSP_USING_PWM1_CH3
-    stm32_pwm_obj[PWM1_INDEX].channel |= 1 << 3;
+    stm32_pwm_obj[PWM1_INDEX].channel |= 1 << 2;
 #endif
 #ifdef BSP_USING_PWM1_CH4
-    stm32_pwm_obj[PWM1_INDEX].channel |= 1 << 4;
+    stm32_pwm_obj[PWM1_INDEX].channel |= 1 << 3;
 #endif
 #ifdef BSP_USING_PWM2_CH1
     stm32_pwm_obj[PWM2_INDEX].channel |= 1 << 0;