Diff: targets/TARGET_NUVOTON/TARGET_M451/sleep.c

Revision:

159:612c381a210f

Parent:

149:156823d33999

--- a/targets/TARGET_NUVOTON/TARGET_M451/sleep.c	Tue Feb 14 14:44:10 2017 +0000
+++ b/targets/TARGET_NUVOTON/TARGET_M451/sleep.c	Tue Feb 28 17:13:35 2017 +0000
@@ -25,8 +25,6 @@
 #include "objects.h"
 #include "PeripheralPins.h"
 
-void us_ticker_prepare_sleep(struct sleep_s *obj);
-void us_ticker_wakeup_from_sleep(struct sleep_s *obj);
 static void mbed_enter_sleep(struct sleep_s *obj);
 static void mbed_exit_sleep(struct sleep_s *obj);
 
@@ -57,8 +55,7 @@
     mbed_exit_sleep(&sleep_obj);
 }
 
-
-void mbed_enter_sleep(struct sleep_s *obj)
+static void mbed_enter_sleep(struct sleep_s *obj)
 {
     // Check if serial allows entering power-down mode
     if (obj->powerdown) {
@@ -77,16 +74,7 @@
         obj->powerdown = pwmout_allow_powerdown();
     }
     // TODO: Check if other peripherals allow entering power-down mode
-    
-    obj->start_us = lp_ticker_read();
-    // Let us_ticker prepare for power-down or reject it.
-    us_ticker_prepare_sleep(obj);
-    
-    // NOTE(STALE): To pass mbed-drivers test, timer requires to be fine-grained, so its implementation needs HIRC rather than LIRC/LXT as its clock source.
-    //       But as CLK_PowerDown()/CLK_Idle() is called, HIRC will be disabled and timer cannot keep counting and alarm. To overcome the dilemma, 
-    //       just make CPU halt and compromise power saving.
-    // NOTE: As CLK_PowerDown()/CLK_Idle() is called, HIRC/HXT will be disabled in normal mode, but not in ICE mode. This may cause confusion in development.
-
+  
     if (obj->powerdown) {   // Power-down mode (HIRC/HXT disabled, LIRC/LXT enabled)
         SYS_UnlockReg();
         CLK_PowerDown();
@@ -101,14 +89,9 @@
     __NOP();
     __NOP();
     __NOP();
-    
-    obj->end_us = lp_ticker_read();
-    obj->period_us = (obj->end_us > obj->start_us) ? (obj->end_us - obj->start_us) : (uint32_t) ((uint64_t) obj->end_us + 0xFFFFFFFFu - obj->start_us);
-    // Let us_ticker recover from power-down.
-    us_ticker_wakeup_from_sleep(obj);
 }
 
-void mbed_exit_sleep(struct sleep_s *obj)
+static void mbed_exit_sleep(struct sleep_s *obj)
 {
     // TODO: TO BE CONTINUED