Zoltan Hudak / MODDMA

Fork of Andy Kirkham's MODDMA GPDMA Controller for Mbed OS 6

Read MODDMA for more info.

INIT.cpp@8:cb4d323ce6fd, 2011-02-05 (annotated)

Committer:
AjK
Date:
Sat Feb 05 08:53:26 2011 +0000
Revision:
8:cb4d323ce6fd
Parent:
0:c409efd8df78 
1.5 See ChangeLog.c

Who changed what in which revision?

UserRevisionLine numberNew contents of line
AjK 8:cb4d323ce6fd 1 /*
AjK 8:cb4d323ce6fd 2 Copyright (c) 2010 Andy Kirkham
AjK 8:cb4d323ce6fd 3
AjK 8:cb4d323ce6fd 4 Permission is hereby granted, free of charge, to any person obtaining a copy
AjK 8:cb4d323ce6fd 5 of this software and associated documentation files (the "Software"), to deal
AjK 8:cb4d323ce6fd 6 in the Software without restriction, including without limitation the rights
AjK 8:cb4d323ce6fd 7 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
AjK 8:cb4d323ce6fd 8 copies of the Software, and to permit persons to whom the Software is
AjK 8:cb4d323ce6fd 9 furnished to do so, subject to the following conditions:
AjK 8:cb4d323ce6fd 10
AjK 8:cb4d323ce6fd 11 The above copyright notice and this permission notice shall be included in
AjK 8:cb4d323ce6fd 12 all copies or substantial portions of the Software.
AjK 8:cb4d323ce6fd 13
AjK 8:cb4d323ce6fd 14 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
AjK 8:cb4d323ce6fd 15 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
AjK 8:cb4d323ce6fd 16 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AjK 8:cb4d323ce6fd 17 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
AjK 8:cb4d323ce6fd 18 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
AjK 8:cb4d323ce6fd 19 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
AjK 8:cb4d323ce6fd 20 THE SOFTWARE.
AjK 8:cb4d323ce6fd 21 */
AjK 8:cb4d323ce6fd 22
AjK 8:cb4d323ce6fd 23 #include "MODDMA.h"
AjK 8:cb4d323ce6fd 24
AjK 8:cb4d323ce6fd 25 namespace AjK {
AjK 8:cb4d323ce6fd 26
AjK 8:cb4d323ce6fd 27 extern uint32_t oldDMAHandler;
AjK 8:cb4d323ce6fd 28 extern "C" void MODDMA_IRQHandler(void);
AjK 8:cb4d323ce6fd 29 extern class MODDMA *moddma_p;
AjK 8:cb4d323ce6fd 30
AjK 8:cb4d323ce6fd 31 void
AjK 8:cb4d323ce6fd 32 MODDMA::init(bool isConstructorCalling, int Channels, int Tc, int Err)
AjK 8:cb4d323ce6fd 33 {
AjK 8:cb4d323ce6fd 34 if (isConstructorCalling) {
AjK 8:cb4d323ce6fd 35 if (LPC_SC->PCONP & (1UL << 29)) {
AjK 8:cb4d323ce6fd 36 if (LPC_GPDMA->DMACConfig & 1) {
AjK 8:cb4d323ce6fd 37 error("Only one instance of MODDMA can exist.");
AjK 8:cb4d323ce6fd 38 }
AjK 8:cb4d323ce6fd 39 }
AjK 8:cb4d323ce6fd 40 LPC_SC->PCONP |= (1UL << 29);
AjK 8:cb4d323ce6fd 41 LPC_GPDMA->DMACConfig = 1;
AjK 8:cb4d323ce6fd 42 moddma_p = this;
AjK 8:cb4d323ce6fd 43 for (int i = 0; i < 8; i++) {
AjK 8:cb4d323ce6fd 44 setups[i] = (MODDMA_Config *)NULL;
AjK 8:cb4d323ce6fd 45 }
AjK 8:cb4d323ce6fd 46 }
AjK 8:cb4d323ce6fd 47
AjK 8:cb4d323ce6fd 48 // Reset channel configuration register(s)
AjK 8:cb4d323ce6fd 49 if (Channels & 0x01) LPC_GPDMACH0->DMACCConfig = 0;
AjK 8:cb4d323ce6fd 50 if (Channels & 0x02) LPC_GPDMACH1->DMACCConfig = 0;
AjK 8:cb4d323ce6fd 51 if (Channels & 0x04) LPC_GPDMACH2->DMACCConfig = 0;
AjK 8:cb4d323ce6fd 52 if (Channels & 0x08) LPC_GPDMACH3->DMACCConfig = 0;
AjK 8:cb4d323ce6fd 53 if (Channels & 0x10) LPC_GPDMACH4->DMACCConfig = 0;
AjK 8:cb4d323ce6fd 54 if (Channels & 0x20) LPC_GPDMACH5->DMACCConfig = 0;
AjK 8:cb4d323ce6fd 55 if (Channels & 0x40) LPC_GPDMACH6->DMACCConfig = 0;
AjK 8:cb4d323ce6fd 56 if (Channels & 0x80) LPC_GPDMACH7->DMACCConfig = 0;
AjK 8:cb4d323ce6fd 57
AjK 8:cb4d323ce6fd 58 /* Clear DMA interrupt and error flag */
AjK 8:cb4d323ce6fd 59 LPC_GPDMA->DMACIntTCClear = Tc;
AjK 8:cb4d323ce6fd 60 LPC_GPDMA->DMACIntErrClr = Err;
AjK 8:cb4d323ce6fd 61
AjK 8:cb4d323ce6fd 62 if (isConstructorCalling) {
AjK 8:cb4d323ce6fd 63 oldDMAHandler = NVIC_GetVector(DMA_IRQn);
AjK 8:cb4d323ce6fd 64 NVIC_SetVector(DMA_IRQn, (uint32_t)MODDMA_IRQHandler);
AjK 8:cb4d323ce6fd 65 NVIC_EnableIRQ(DMA_IRQn);
AjK 8:cb4d323ce6fd 66 }
AjK 8:cb4d323ce6fd 67 }
AjK 8:cb4d323ce6fd 68
AjK 8:cb4d323ce6fd 69 }; // namespace AjK ends