Update drv_pwm.c

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;