Diff: hal/hal.cpp

Revision:

0:62d1edcc13d1

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hal/hal.cpp	Thu Jan 22 12:50:49 2015 +0000
@@ -0,0 +1,270 @@
+/*******************************************************************************
+ * Copyright (c) 2014 IBM Corporation.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *    IBM Zurich Research Lab - initial API, implementation and documentation
+ *    Semtech Apps Team       - Modified to support the MBED sx1276 driver
+ *                              library.
+ *                              Possibility to use original or Semtech's MBED
+ *                              radio driver. The selection is done by setting
+ *                              USE_SMTC_RADIO_DRIVER preprocessing directive
+ *                              in lmic.h
+ *******************************************************************************/
+#include "mbed.h"
+#include "lmic.h"
+#include "mbed_debug.h"
+
+#if USE_SMTC_RADIO_DRIVER
+
+#else
+
+extern void radio_irq_handler( u1_t dio );
+
+static DigitalOut nss( D10 );
+static SPI spi( D11, D12, D13 ); // ( mosi, miso, sclk )
+ 
+static DigitalInOut rst( A0 );
+static DigitalOut rxtx( A4 );
+ 
+static InterruptIn dio0( D2 );
+static InterruptIn dio1( D3 );
+static InterruptIn dio2( D4 ); 
+
+static void dio0Irq( void )
+{
+    radio_irq_handler( 0 );
+}
+
+static void dio1Irq( void )
+{
+    radio_irq_handler( 1 );
+}
+static void dio2Irq( void )
+{
+    radio_irq_handler( 2 );
+}
+
+#endif
+
+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;
+
+#if USE_SMTC_RADIO_DRIVER
+
+#else
+    // configure input lines
+    dio0.mode( PullDown );
+    dio0.rise( dio0Irq );
+    dio0.enable_irq( );
+    dio1.mode( PullDown );   
+    dio1.rise( dio1Irq );
+    dio1.enable_irq( );
+    dio2.mode( PullDown );
+    dio2.rise( dio2Irq );
+    dio2.enable_irq( );
+    // configure reset line
+    rst.input( );
+    // configure spi
+    spi.frequency( 8000000 );
+    spi.format( 8, 0 );
+    nss = 1;
+#endif
+    // configure timer
+    timer.start( );
+    ticker.attach_us( reset_timer, 10000000 ); // reset timer every 10sec
+     __enable_irq( );
+}
+
+#if USE_SMTC_RADIO_DRIVER
+
+#else
+
+void hal_pin_rxtx( u1_t val )
+{
+    rxtx = !val;
+}
+
+void hal_pin_nss( u1_t val )
+{
+    nss = val;
+}
+
+void hal_pin_rst( u1_t val )
+{
+    if( val == 0 || val == 1 )
+    { // drive pin
+        rst.output( );
+        rst = val;
+    } 
+    else
+    { // keep pin floating
+        rst.input( );
+    }
+}
+
+u1_t hal_spi( u1_t out )
+{
+    return spi.write( out );
+}
+
+#endif
+
+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 );
+}
+
+//////////////////////////////////////////////////////////////////////
+// DEBUG CODE BELOW (use CFG_DEBUG)
+//////////////////////////////////////////////////////////////////////
+#ifdef CFG_DEBUG
+
+void debug_init( void )
+{
+    // print banner
+    debug( "\r\n============== DEBUG STARTED ==============\r\n" );
+}
+
+void debug_char( u1_t c )
+{
+    debug( "%c", c );
+}
+
+void debug_hex( u1_t b )
+{
+    debug( "%02X", b );
+}
+
+void debug_buf( const u1_t* buf, u2_t len )
+{
+    while( len-- )
+    {
+        debug_hex( *buf++ );
+        debug_char( ' ' );
+    }
+    debug_char( '\r' );
+    debug_char( '\n' );
+}
+
+void debug_uint( u4_t v )
+{
+    for( s1_t n = 24; n >= 0; n -= 8 )
+    {
+        debug_hex( v >> n );
+    }
+}
+
+void debug_str( const u1_t* str )
+{
+    while( *str )
+    {
+        debug_char( *str++ );
+    }
+}
+
+void debug_val( const u1_t* label, u4_t val )
+{
+    debug_str( label );
+    debug_uint( val );
+    debug_char( '\r' );
+    debug_char( '\n' );
+}
+
+void debug_led( u1_t val )
+{
+    debug_val( "LED = ", val );
+}
+
+void debug_event( int ev ) 
+{
+    static const u1_t* evnames[] = 
+    {
+        [EV_SCAN_TIMEOUT]   = "SCAN_TIMEOUT",
+        [EV_BEACON_FOUND]   = "BEACON_FOUND",
+        [EV_BEACON_MISSED]  = "BEACON_MISSED",
+        [EV_BEACON_TRACKED] = "BEACON_TRACKED",
+        [EV_JOINING]        = "JOINING",
+        [EV_JOINED]         = "JOINED",
+        [EV_RFU1]           = "RFU1",
+        [EV_JOIN_FAILED]    = "JOIN_FAILED",
+        [EV_REJOIN_FAILED]  = "REJOIN_FAILED",
+        [EV_TXCOMPLETE]     = "TXCOMPLETE",
+        [EV_LOST_TSYNC]     = "LOST_TSYNC",
+        [EV_RESET]          = "RESET",
+        [EV_RXCOMPLETE]     = "RXCOMPLETE",
+        [EV_LINK_DEAD]      = "LINK_DEAD",
+        [EV_LINK_ALIVE]     = "LINK_ALIVE",
+    };
+    debug( "%s\r\n", evnames[ev] );
+}
+#endif // CFG_DEBUG