Diff: hal.cpp

Revision:

0:70cd1a15fe4a

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hal.cpp	Thu Jun 30 13:01:32 2016 +0000
@@ -0,0 +1,71 @@
+#include "mbed.h"
+#include "lmic.h"
+#include "mbed_debug.h"
+
+static u1_t irqlevel = 0;
+static u4_t ticks = 0;
+
+static Timer timer;
+static Ticker ticker;
+
+static void reset_timer( void ) {
+    ticks += timer.read_us( ) >> 6;
+    timer.reset( );
+}
+
+void hal_init( void ) {
+     __disable_irq( );
+     irqlevel = 0;
+
+    // configure timer
+    timer.start( );
+    ticker.attach_us( reset_timer, 10000000 ); // reset timer every 10sec
+     __enable_irq( );
+}
+
+void hal_disableIRQs( void ) {
+    __disable_irq( );
+    irqlevel++;
+}
+
+void hal_enableIRQs( void ) {
+    if( --irqlevel == 0 )
+    {
+        __enable_irq( );
+    }
+}
+
+void hal_sleep( void ) {
+    // NOP
+}
+
+u4_t hal_ticks( void ) {
+    hal_disableIRQs( );
+    int t = ticks + ( timer.read_us( ) >> 6 );
+    hal_enableIRQs( );
+    return t;
+}
+
+static u2_t deltaticks( u4_t time ) {
+    u4_t t = hal_ticks( );
+    s4_t d = time - t;
+    if( d <= 0 ) {
+        return 0;    // in the past
+    }
+    if( ( d >> 16 ) != 0 ) {
+        return 0xFFFF; // far ahead
+    }
+    return ( u2_t )d;
+}
+
+void hal_waitUntil( u4_t time ) {
+    while( deltaticks( time ) != 0 ); // busy wait until timestamp is reached
+}
+
+u1_t hal_checkTimer( u4_t time ) {
+    return ( deltaticks( time ) < 2 );
+}
+
+void hal_failed( void ) {
+    while( 1 );
+}
\ No newline at end of file