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Superseded

This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.

Development branch of the mbed library sources. This library is kept in synch with the latest changes from the mbed SDK and it is not guaranteed to work.

If you are looking for a stable and tested release, please import one of the official mbed library releases:

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The official Mbed 2 C/C++ SDK provides the software platform and libraries to build your applications.

Last commit 20 Feb 2019 by mbed official

Diff: targets/hal/TARGET_NORDIC/TARGET_MCU_NRF51822/us_ticker.c

Revision:
300:55638feb26a4
Parent:
270:e2babe29baf8
Child:
304:89b9c3a9a045
--- a/targets/hal/TARGET_NORDIC/TARGET_MCU_NRF51822/us_ticker.c	Wed Aug 27 04:00:07 2014 +0100
+++ b/targets/hal/TARGET_NORDIC/TARGET_MCU_NRF51822/us_ticker.c	Wed Aug 27 08:45:06 2014 +0100
@@ -21,107 +21,109 @@
 #define US_TICKER_TIMER      NRF_TIMER1
 #define US_TICKER_TIMER_IRQn TIMER1_IRQn
 
-int us_ticker_inited = 0;
-volatile uint16_t overflow=0; //overflow value that forms the upper 16 bits of the counter
-volatile uint16_t timeStamp=0;
+int us_ticker_inited        = 0;
+volatile uint16_t overflow  = 0; //overflow value that forms the upper 16 bits of the counter
+volatile uint16_t timeStamp = 0;
 
 #ifdef __cplusplus
 extern "C" {
-#endif 
-void TIMER1_IRQHandler(void){ 
+#endif
 
-     if ((US_TICKER_TIMER->EVENTS_COMPARE[1] != 0) && 
-       ((US_TICKER_TIMER->INTENSET & TIMER_INTENSET_COMPARE1_Msk) != 0))
-    {
-		US_TICKER_TIMER->EVENTS_COMPARE[1] = 0;
-		overflow++;    
-		US_TICKER_TIMER->CC[1] =0xFFFF;
-		if(timeStamp>0)
-		{			
-			timeStamp--;
-			if(timeStamp==0)
-			{				
-				us_ticker_clear_interrupt();
-				us_ticker_disable_interrupt();
-				us_ticker_irq_handler();					
-				return;
-			}
-		}			       
+void TIMER1_IRQHandler(void)
+{
+    if ((US_TICKER_TIMER->EVENTS_COMPARE[1] != 0) &&
+        ((US_TICKER_TIMER->INTENSET & TIMER_INTENSET_COMPARE1_Msk) != 0)) {
+        US_TICKER_TIMER->EVENTS_COMPARE[1] = 0;
+        overflow++;
+        US_TICKER_TIMER->CC[1] = 0xFFFF;
+        if (timeStamp>0) {
+            timeStamp--;
+            if (timeStamp==0) {
+                us_ticker_clear_interrupt();
+                us_ticker_disable_interrupt();
+                us_ticker_irq_handler();
+                return;
+            }
+        }
     }
-	if ((US_TICKER_TIMER->EVENTS_COMPARE[0] != 0) && 
-    ((US_TICKER_TIMER->INTENSET & TIMER_INTENSET_COMPARE0_Msk) != 0))
-    {	
-		us_ticker_clear_interrupt();
-		us_ticker_disable_interrupt();
-		if(timeStamp==0)
-			us_ticker_irq_handler();			
+    if ((US_TICKER_TIMER->EVENTS_COMPARE[0] != 0) &&
+        ((US_TICKER_TIMER->INTENSET & TIMER_INTENSET_COMPARE0_Msk) != 0)) {
+        us_ticker_clear_interrupt();
+        us_ticker_disable_interrupt();
+        if (timeStamp==0) {
+            us_ticker_irq_handler();
+        }
     }
-        
 }
+
 #ifdef __cplusplus
 }
-#endif 
-void us_ticker_init(void){
-    if (us_ticker_inited && US_TICKER_TIMER->POWER){
+#endif
+void us_ticker_init(void)
+{
+    if (us_ticker_inited && US_TICKER_TIMER->POWER) {
         return;
     }
-    
+
     us_ticker_inited = 1;
-    
+
     US_TICKER_TIMER->POWER = 0;
     US_TICKER_TIMER->POWER = 1;
-    
+
     US_TICKER_TIMER->MODE = TIMER_MODE_MODE_Timer;
-    
-    US_TICKER_TIMER->PRESCALER = 4;
-    US_TICKER_TIMER->BITMODE = TIMER_BITMODE_BITMODE_16Bit; 
-    US_TICKER_TIMER->TASKS_CLEAR =1;
-    US_TICKER_TIMER->CC[1] = 0xFFFF;
-    US_TICKER_TIMER->INTENSET = TIMER_INTENSET_COMPARE1_Set << TIMER_INTENSET_COMPARE1_Pos;
-	
+
+    US_TICKER_TIMER->PRESCALER   = 4;
+    US_TICKER_TIMER->BITMODE     = TIMER_BITMODE_BITMODE_16Bit;
+    US_TICKER_TIMER->TASKS_CLEAR = 1;
+    US_TICKER_TIMER->CC[1]       = 0xFFFF;
+    US_TICKER_TIMER->INTENSET    = TIMER_INTENSET_COMPARE1_Set << TIMER_INTENSET_COMPARE1_Pos;
+
     NVIC_SetPriority(US_TICKER_TIMER_IRQn, 3);
     NVIC_EnableIRQ(US_TICKER_TIMER_IRQn);
-    
+
     US_TICKER_TIMER->TASKS_START = 0x01;
 }
 
-uint32_t us_ticker_read(){
-    if (!us_ticker_inited || US_TICKER_TIMER->POWER==0){
+uint32_t us_ticker_read()
+{
+    if (!us_ticker_inited || (US_TICKER_TIMER->POWER==0)) {
         us_ticker_init();
     }
-    
-    uint16_t bufferedOverFlow   =         overflow;
-    US_TICKER_TIMER->TASKS_CAPTURE[2] = 1; 
-	
-    if(overflow!=bufferedOverFlow){
-		bufferedOverFlow = overflow;
-		US_TICKER_TIMER->TASKS_CAPTURE[2] = 1;
-	}
-    return (((uint32_t)bufferedOverFlow<<16) | US_TICKER_TIMER->CC[2]);
+
+    uint16_t bufferedOverFlow =         overflow;
+    US_TICKER_TIMER->TASKS_CAPTURE[2] = 1;
+
+    if (overflow!=bufferedOverFlow) {
+        bufferedOverFlow                  = overflow;
+        US_TICKER_TIMER->TASKS_CAPTURE[2] = 1;
+    }
+    return (((uint32_t)bufferedOverFlow << 16) | US_TICKER_TIMER->CC[2]);
 }
 
-void us_ticker_set_interrupt(unsigned int timestamp){
-    if (!us_ticker_inited || US_TICKER_TIMER->POWER==0)
-    {
+void us_ticker_set_interrupt(unsigned int timestamp)
+{
+    if (!us_ticker_inited || (US_TICKER_TIMER->POWER == 0)) {
         us_ticker_init();
-    }	
-	
-	US_TICKER_TIMER->TASKS_CAPTURE[0] = 1;	
-	uint16_t tsUpper16 = (uint16_t)((timestamp-us_ticker_read())>>16);
-	if(tsUpper16>0){
-		if(timeStamp ==0 || timeStamp> tsUpper16){
-			timeStamp = tsUpper16;			
-		}
-	}
-	else{
-		US_TICKER_TIMER->INTENSET |= TIMER_INTENSET_COMPARE0_Set << TIMER_INTENSET_COMPARE0_Pos;
-		US_TICKER_TIMER->CC[0] += timestamp-us_ticker_read();
-	}
+    }
+
+    US_TICKER_TIMER->TASKS_CAPTURE[0] = 1;
+    uint16_t tsUpper16 = (uint16_t)((timestamp - us_ticker_read()) >> 16);
+    if (tsUpper16>0) {
+        if ((timeStamp ==0) || (timeStamp> tsUpper16)) {
+            timeStamp = tsUpper16;
+        }
+    } else {
+        US_TICKER_TIMER->INTENSET |= TIMER_INTENSET_COMPARE0_Set << TIMER_INTENSET_COMPARE0_Pos;
+        US_TICKER_TIMER->CC[0]    += timestamp - us_ticker_read();
+    }
 }
 
-void us_ticker_disable_interrupt(void){
+void us_ticker_disable_interrupt(void)
+{
     US_TICKER_TIMER->INTENCLR = TIMER_INTENCLR_COMPARE0_Clear << TIMER_INTENCLR_COMPARE0_Pos;
 }
-void us_ticker_clear_interrupt(void){
+
+void us_ticker_clear_interrupt(void)
+{
     US_TICKER_TIMER->EVENTS_COMPARE[0] = 0;
 }