Diff: Ticker2Sys.cpp

Revision:

0:5c7fd96cf29a

Child:

1:e60d949ec09a

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Ticker2Sys.cpp	Fri Feb 11 10:42:52 2011 +0000
@@ -0,0 +1,82 @@
+/*
+    Copyright (c) 2011 Andy Kirkham
+ 
+    Permission is hereby granted, free of charge, to any person obtaining a copy
+    of this software and associated documentation files (the "Software"), to deal
+    in the Software without restriction, including without limitation the rights
+    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+    copies of the Software, and to permit persons to whom the Software is
+    furnished to do so, subject to the following conditions:
+ 
+    The above copyright notice and this permission notice shall be included in
+    all copies or substantial portions of the Software.
+ 
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+    THE SOFTWARE.
+*/
+
+// Mimic Mbed's Ticker class but using TIMER2
+// (note, only goes to milliseconds level not microseconds!)
+
+#include "TickersSys.h"
+
+namespace AjK {
+
+// Create a Ticker1 controller.
+Ticker2Sys _ticker2Sys;
+
+// Nice and simple ISR, just call the class standard handler.
+extern "C" void TIMER2_IRQHandler(void) __irq 
+{
+    _ticker2Sys.isr();    
+}
+
+Ticker2Sys::Ticker2Sys(void)
+{    
+    LPC_SC->PCONP    |= (1UL << 22); // TIM1 On
+    LPC_SC->PCLKSEL1 |= (3UL << 12); // CCLK/8 = 12MHz
+    LPC_TIM2->PR      = 11;          // TC clocks at 1MHz.
+    LPC_TIM2->MR0     = 1000;        // Match at 1kHz.
+    LPC_TIM2->MCR    |= 1;           // Generate an interrupt.
+    LPC_TIM2->TCR     = 1;           // Enable Timer1 to count.
+    NVIC_EnableIRQ(TIMER2_IRQn);
+}
+
+void 
+Ticker2Sys::addTicker(TickerB *t)
+{
+    tickers.push_back(t);   
+}
+
+void 
+Ticker2Sys::delTicker(TickerB *t)
+{
+    for (list<TickerB *>::iterator itor = tickers.begin(); itor !=  tickers.end(); ++itor) {
+        if ((*itor) == t) {
+            itor = tickers.erase(itor);
+            return;
+        }
+    }
+}
+
+void 
+Ticker2Sys::isr(void)
+{
+    LPC_TIM2->IR = 1;
+    LPC_TIM2->MR0 += 1000;
+    if (tickers.empty()) return;
+    
+    for (list<TickerB *>::iterator itor = tickers.begin(); itor !=  tickers.end(); ++itor) {
+        (*itor)->tick();
+    }
+    
+}    
+
+}; // namespace AjK ends.
+
+