Suga koubou / Mbed 2 deprecated MODDMA_LLI_test

GPDMA (Direct Memory Access) and LLI (Link List Item) test see: http://mbed.org/users/okini3939/notebook/dma_jp/

Dependencies:   mbed

MODDMA/MODDMA.cpp@0:de79d4a48e63, 2013-09-13 (annotated)

Committer:
okini3939
Date:
Fri Sep 13 14:49:52 2013 +0000
Revision:
0:de79d4a48e63
GPDMA (Direct Memory Access) and LLI (Link List Item) test

Who changed what in which revision?

UserRevisionLine numberNew contents of line
okini3939 0:de79d4a48e63 1 /*
okini3939 0:de79d4a48e63 2 Copyright (c) 2010 Andy Kirkham
okini3939 0:de79d4a48e63 3
okini3939 0:de79d4a48e63 4 Permission is hereby granted, free of charge, to any person obtaining a copy
okini3939 0:de79d4a48e63 5 of this software and associated documentation files (the "Software"), to deal
okini3939 0:de79d4a48e63 6 in the Software without restriction, including without limitation the rights
okini3939 0:de79d4a48e63 7 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
okini3939 0:de79d4a48e63 8 copies of the Software, and to permit persons to whom the Software is
okini3939 0:de79d4a48e63 9 furnished to do so, subject to the following conditions:
okini3939 0:de79d4a48e63 10
okini3939 0:de79d4a48e63 11 The above copyright notice and this permission notice shall be included in
okini3939 0:de79d4a48e63 12 all copies or substantial portions of the Software.
okini3939 0:de79d4a48e63 13
okini3939 0:de79d4a48e63 14 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
okini3939 0:de79d4a48e63 15 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
okini3939 0:de79d4a48e63 16 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
okini3939 0:de79d4a48e63 17 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
okini3939 0:de79d4a48e63 18 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
okini3939 0:de79d4a48e63 19 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
okini3939 0:de79d4a48e63 20 THE SOFTWARE.
okini3939 0:de79d4a48e63 21 */
okini3939 0:de79d4a48e63 22 #include "iomacros.h"
okini3939 0:de79d4a48e63 23 #include "MODDMA.h"
okini3939 0:de79d4a48e63 24
okini3939 0:de79d4a48e63 25 namespace AjK {
okini3939 0:de79d4a48e63 26
okini3939 0:de79d4a48e63 27 // Create a "hook" for our ISR to make callbacks. Set by init()
okini3939 0:de79d4a48e63 28 class MODDMA *moddma_p = (class MODDMA *)NULL;
okini3939 0:de79d4a48e63 29
okini3939 0:de79d4a48e63 30 void
okini3939 0:de79d4a48e63 31 MODDMA::Enable(CHANNELS ChannelNumber)
okini3939 0:de79d4a48e63 32 {
okini3939 0:de79d4a48e63 33 LPC_GPDMACH_TypeDef *pChannel = (LPC_GPDMACH_TypeDef *)Channel_p( ChannelNumber );
okini3939 0:de79d4a48e63 34 pChannel->DMACCConfig |= _E;
okini3939 0:de79d4a48e63 35 }
okini3939 0:de79d4a48e63 36
okini3939 0:de79d4a48e63 37 bool
okini3939 0:de79d4a48e63 38 MODDMA::Enabled(CHANNELS ChannelNumber)
okini3939 0:de79d4a48e63 39 {
okini3939 0:de79d4a48e63 40 LPC_GPDMACH_TypeDef *pChannel = (LPC_GPDMACH_TypeDef *)Channel_p( ChannelNumber );
okini3939 0:de79d4a48e63 41 return (bool)(pChannel->DMACCConfig & _E);
okini3939 0:de79d4a48e63 42 }
okini3939 0:de79d4a48e63 43
okini3939 0:de79d4a48e63 44 void
okini3939 0:de79d4a48e63 45 MODDMA::Disable(CHANNELS ChannelNumber)
okini3939 0:de79d4a48e63 46 {
okini3939 0:de79d4a48e63 47 LPC_GPDMACH_TypeDef *pChannel = (LPC_GPDMACH_TypeDef *)Channel_p( ChannelNumber );
okini3939 0:de79d4a48e63 48 pChannel->DMACCConfig &= ~(_E);
okini3939 0:de79d4a48e63 49 }
okini3939 0:de79d4a48e63 50
okini3939 0:de79d4a48e63 51 bool
okini3939 0:de79d4a48e63 52 MODDMA::isActive(CHANNELS ChannelNumber)
okini3939 0:de79d4a48e63 53 {
okini3939 0:de79d4a48e63 54 LPC_GPDMACH_TypeDef *pChannel = (LPC_GPDMACH_TypeDef *)Channel_p( ChannelNumber );
okini3939 0:de79d4a48e63 55 return (bool)( pChannel->DMACCConfig & CxConfig_A() ) ;
okini3939 0:de79d4a48e63 56 }
okini3939 0:de79d4a48e63 57
okini3939 0:de79d4a48e63 58 void
okini3939 0:de79d4a48e63 59 MODDMA::haltChannel(CHANNELS ChannelNumber)
okini3939 0:de79d4a48e63 60 {
okini3939 0:de79d4a48e63 61 LPC_GPDMACH_TypeDef *pChannel = (LPC_GPDMACH_TypeDef *)Channel_p( ChannelNumber );
okini3939 0:de79d4a48e63 62 pChannel->DMACCConfig |= CxConfig_H();
okini3939 0:de79d4a48e63 63 }
okini3939 0:de79d4a48e63 64
okini3939 0:de79d4a48e63 65 uint32_t
okini3939 0:de79d4a48e63 66 MODDMA::getControl(CHANNELS ChannelNumber)
okini3939 0:de79d4a48e63 67 {
okini3939 0:de79d4a48e63 68 LPC_GPDMACH_TypeDef *pChannel = (LPC_GPDMACH_TypeDef *)Channel_p( ChannelNumber );
okini3939 0:de79d4a48e63 69 return pChannel->DMACCControl;
okini3939 0:de79d4a48e63 70 }
okini3939 0:de79d4a48e63 71
okini3939 0:de79d4a48e63 72 uint32_t oldDMAHandler = 0;
okini3939 0:de79d4a48e63 73 typedef void (*MODDMA_FN)(void);
okini3939 0:de79d4a48e63 74
okini3939 0:de79d4a48e63 75 extern "C" void MODDMA_IRQHandler(void) {
okini3939 0:de79d4a48e63 76 uint32_t channel_mask;
okini3939 0:de79d4a48e63 77
okini3939 0:de79d4a48e63 78 if (moddma_p == (class MODDMA *)NULL) {
okini3939 0:de79d4a48e63 79 if (oldDMAHandler) {
okini3939 0:de79d4a48e63 80 ((MODDMA_FN)oldDMAHandler)();
okini3939 0:de79d4a48e63 81 return;
okini3939 0:de79d4a48e63 82 }
okini3939 0:de79d4a48e63 83 else {
okini3939 0:de79d4a48e63 84 error("Interrupt without instance");
okini3939 0:de79d4a48e63 85 }
okini3939 0:de79d4a48e63 86 }
okini3939 0:de79d4a48e63 87
okini3939 0:de79d4a48e63 88 for (int channel_number = 0; channel_number < 8; channel_number++) {
okini3939 0:de79d4a48e63 89 channel_mask = (1UL << channel_number);
okini3939 0:de79d4a48e63 90 if (LPC_GPDMA->DMACIntStat & channel_mask) {
okini3939 0:de79d4a48e63 91 if (LPC_GPDMA->DMACIntTCStat & channel_mask) {
okini3939 0:de79d4a48e63 92 if (moddma_p->setups[channel_number] != (MODDMA_Config *)NULL) {
okini3939 0:de79d4a48e63 93 moddma_p->setIrqProcessingChannel((MODDMA::CHANNELS)channel_number);
okini3939 0:de79d4a48e63 94 moddma_p->setIrqType(MODDMA::TcIrq);
okini3939 0:de79d4a48e63 95 moddma_p->setups[channel_number]->isrIntTCStat->call();
okini3939 0:de79d4a48e63 96 moddma_p->isrIntTCStat.call();
okini3939 0:de79d4a48e63 97 // The user callback should clear the IRQ. But if they forget
okini3939 0:de79d4a48e63 98 // then the Mbed will lockup. So, check to see if the IRQ has
okini3939 0:de79d4a48e63 99 // been dismissed, if not, we will dismiss it here.
okini3939 0:de79d4a48e63 100 if (LPC_GPDMA->DMACIntTCStat & channel_mask) {
okini3939 0:de79d4a48e63 101 LPC_GPDMA->DMACIntTCClear = channel_mask;
okini3939 0:de79d4a48e63 102 }
okini3939 0:de79d4a48e63 103 // If the user has left the channel enabled, disable it.
okini3939 0:de79d4a48e63 104 // Note, we don't check Active here as it may block inside
okini3939 0:de79d4a48e63 105 // an ISR, we just shut it down immediately. If the user
okini3939 0:de79d4a48e63 106 // must wait for completion they should implement their
okini3939 0:de79d4a48e63 107 // own ISR. But only disable if the LLI linked list register
okini3939 0:de79d4a48e63 108 // is null otherwise we can crap out a series of transfers.
okini3939 0:de79d4a48e63 109 if (moddma_p->Enabled( (MODDMA::CHANNELS)channel_number )) {
okini3939 0:de79d4a48e63 110 if (moddma_p->lli( (MODDMA::CHANNELS)channel_number ) == 0 ) {
okini3939 0:de79d4a48e63 111 moddma_p->Disable( (MODDMA::CHANNELS)channel_number );
okini3939 0:de79d4a48e63 112 }
okini3939 0:de79d4a48e63 113 }
okini3939 0:de79d4a48e63 114 }
okini3939 0:de79d4a48e63 115 }
okini3939 0:de79d4a48e63 116
okini3939 0:de79d4a48e63 117 if (LPC_GPDMA->DMACIntErrStat & channel_mask) {
okini3939 0:de79d4a48e63 118 if (moddma_p->setups[channel_number] != (MODDMA_Config *)NULL) {
okini3939 0:de79d4a48e63 119 moddma_p->setIrqProcessingChannel((MODDMA::CHANNELS)channel_number);
okini3939 0:de79d4a48e63 120 moddma_p->setIrqType(MODDMA::ErrIrq);
okini3939 0:de79d4a48e63 121 moddma_p->setups[channel_number]->isrIntErrStat->call();
okini3939 0:de79d4a48e63 122 moddma_p->isrIntErrStat.call();
okini3939 0:de79d4a48e63 123 // The user callback should clear the IRQ. But if they forget
okini3939 0:de79d4a48e63 124 // then the Mbed will lockup. So, check to see if the IRQ has
okini3939 0:de79d4a48e63 125 // been dismissed, if not, we will dismiss it here.
okini3939 0:de79d4a48e63 126 if (LPC_GPDMA->DMACIntErrStat & channel_mask) {
okini3939 0:de79d4a48e63 127 LPC_GPDMA->DMACIntErrClr = channel_mask;
okini3939 0:de79d4a48e63 128 }
okini3939 0:de79d4a48e63 129 // If the user has left the channel enabled, disable it.
okini3939 0:de79d4a48e63 130 // Not, we don't check Active here as it may block inside
okini3939 0:de79d4a48e63 131 // an ISR, we just shut it down immediately. If the user
okini3939 0:de79d4a48e63 132 // must wait for completion they should implement their
okini3939 0:de79d4a48e63 133 // own ISR. But only disable if the LLI linked list register
okini3939 0:de79d4a48e63 134 // is null otherwise we can crap out a series of transfers.
okini3939 0:de79d4a48e63 135 if (moddma_p->Enabled( (MODDMA::CHANNELS)channel_number )) {
okini3939 0:de79d4a48e63 136 if (moddma_p->lli( (MODDMA::CHANNELS)channel_number ) == 0 ) {
okini3939 0:de79d4a48e63 137 moddma_p->Disable( (MODDMA::CHANNELS)channel_number );
okini3939 0:de79d4a48e63 138 }
okini3939 0:de79d4a48e63 139 }
okini3939 0:de79d4a48e63 140 }
okini3939 0:de79d4a48e63 141 }
okini3939 0:de79d4a48e63 142 }
okini3939 0:de79d4a48e63 143 }
okini3939 0:de79d4a48e63 144
okini3939 0:de79d4a48e63 145 /* IRQ should be handled by now, check to make sure. */
okini3939 0:de79d4a48e63 146 if (LPC_GPDMA->DMACIntStat) {
okini3939 0:de79d4a48e63 147 ((MODDMA_FN)oldDMAHandler)();
okini3939 0:de79d4a48e63 148 LPC_GPDMA->DMACIntTCClear = (uint32_t)0xFF; /* If not, clear anyway! */
okini3939 0:de79d4a48e63 149 }
okini3939 0:de79d4a48e63 150 if (LPC_GPDMA->DMACIntErrStat) {
okini3939 0:de79d4a48e63 151 ((MODDMA_FN)oldDMAHandler)();
okini3939 0:de79d4a48e63 152 LPC_GPDMA->DMACIntErrClr = (uint32_t)0xFF; /* If not, clear anyway! */
okini3939 0:de79d4a48e63 153 }
okini3939 0:de79d4a48e63 154 }
okini3939 0:de79d4a48e63 155
okini3939 0:de79d4a48e63 156 }; // namespace AjK ends
okini3939 0:de79d4a48e63 157