diff --git a/cm_backtrace/cmb_cfg.h b/cm_backtrace/cmb_cfg.h
index e88583f..f33ba88 100644
--- a/cm_backtrace/cmb_cfg.h
+++ b/cm_backtrace/cmb_cfg.h
@@ -39,7 +39,7 @@
 /* #define CMB_OS_PLATFORM_TYPE           CMB_OS_PLATFORM_RTT or CMB_OS_PLATFORM_UCOSII or CMB_OS_PLATFORM_UCOSIII or CMB_OS_PLATFORM_FREERTOS */
 /* cpu platform type, must config by user */
 #define CMB_CPU_PLATFORM_TYPE          /* CMB_CPU_ARM_CORTEX_M0 or CMB_CPU_ARM_CORTEX_M3 or CMB_CPU_ARM_CORTEX_M4 or CMB_CPU_ARM_CORTEX_M7 */
-/* enable dump stack infomation */
+/* enable dump stack information */
 /* #define CMB_USING_DUMP_STACK_INFO */
 /* language of print information */
 /* #define CMB_PRINT_LANGUAGE             CMB_PRINT_LANGUAGE_ENGLISH(default) or CMB_PRINT_LANUUAGE_CHINESE */
diff --git a/demo/non_os/stm32f10x/components/cm_backtrace/cmb_cfg.h b/demo/non_os/stm32f10x/components/cm_backtrace/cmb_cfg.h
index e80a331..2806dd1 100644
--- a/demo/non_os/stm32f10x/components/cm_backtrace/cmb_cfg.h
+++ b/demo/non_os/stm32f10x/components/cm_backtrace/cmb_cfg.h
@@ -29,12 +29,13 @@
 #ifndef _CMB_CFG_H_
 #define _CMB_CFG_H_
 
+/* print line, must config by user */
 #define cmb_println(...)               printf(__VA_ARGS__);printf("\r\n")
-/* enable bare metal(non-os) platform */
+/* enable bare metal(no OS) platform */
 #define CMB_USING_BARE_METAL_PLATFORM
-/* cpu platform type */
+/* cpu platform type, must config by user */
 #define CMB_CPU_PLATFORM_TYPE          CMB_CPU_ARM_CORTEX_M3
-/* enable dump stack infomation */
+/* enable dump stack information */
 #define CMB_USING_DUMP_STACK_INFO
 /* language of print information */
 #define CMB_PRINT_LANGUAGE             CMB_PRINT_LANUUAGE_ENGLISH