Diff: MODDMA/INIT.cpp

Revision:

2:a3e0f7f37ac9

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/MODDMA/INIT.cpp	Wed Dec 05 07:56:09 2012 +0000
@@ -0,0 +1,69 @@
+/*
+    Copyright (c) 2010 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.
+*/
+
+#include "MODDMA.h"
+
+namespace AjK {
+
+extern uint32_t oldDMAHandler;
+extern "C" void MODDMA_IRQHandler(void);
+extern class MODDMA *moddma_p;
+
+void
+MODDMA::init(bool isConstructorCalling, int Channels, int Tc, int Err)
+{
+    if (isConstructorCalling) {    
+        if (LPC_SC->PCONP & (1UL << 29)) {
+            if (LPC_GPDMA->DMACConfig & 1) {
+                error("Only one instance of MODDMA can exist.");
+            }
+        }
+        LPC_SC->PCONP |= (1UL << 29);
+        LPC_GPDMA->DMACConfig = 1;
+        moddma_p = this;
+        for (int i = 0; i < 8; i++) {
+            setups[i] = (MODDMA_Config *)NULL;
+        }        
+    }
+    
+    // Reset channel configuration register(s)
+    if (Channels & 0x01) LPC_GPDMACH0->DMACCConfig = 0;
+    if (Channels & 0x02) LPC_GPDMACH1->DMACCConfig = 0;
+    if (Channels & 0x04) LPC_GPDMACH2->DMACCConfig = 0;
+    if (Channels & 0x08) LPC_GPDMACH3->DMACCConfig = 0;
+    if (Channels & 0x10) LPC_GPDMACH4->DMACCConfig = 0;
+    if (Channels & 0x20) LPC_GPDMACH5->DMACCConfig = 0;
+    if (Channels & 0x40) LPC_GPDMACH6->DMACCConfig = 0;
+    if (Channels & 0x80) LPC_GPDMACH7->DMACCConfig = 0;
+
+    /* Clear DMA interrupt and error flag */
+    LPC_GPDMA->DMACIntTCClear = Tc;
+    LPC_GPDMA->DMACIntErrClr  = Err;
+    
+    if (isConstructorCalling) {    
+        oldDMAHandler = NVIC_GetVector(DMA_IRQn);
+        NVIC_SetVector(DMA_IRQn, (uint32_t)MODDMA_IRQHandler);
+        NVIC_EnableIRQ(DMA_IRQn);
+    }
+}
+
+}; // namespace AjK ends