Zoltan Hudak / MODDMA

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

Read MODDMA for more info.

MODDMA.cpp@20:01d0a680e45a, 16 months ago (annotated)

Committer:
hudakz
Date:
Mon Dec 12 15:08:37 2022 +0000
Revision:
20:01d0a680e45a
Parent:
18:31f858967e93 
Fork of Andy Kirkham's MODDMA GPDMA Controller for Mbed OS 6.; The examples are updated in order to compile with Mbed OS 6.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
AjK 8:cb4d323ce6fd 1 /*
AjK 8:cb4d323ce6fd 2 Copyright (c) 2010 Andy Kirkham
hudakz 18:31f858967e93 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:
hudakz 18:31f858967e93 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.
hudakz 18:31f858967e93 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 #include "iomacros.h"
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 // Create a "hook" for our ISR to make callbacks. Set by init()
AjK 8:cb4d323ce6fd 28 class MODDMA *moddma_p = (class MODDMA *)NULL;
AjK 8:cb4d323ce6fd 29
AjK 8:cb4d323ce6fd 30 void
AjK 8:cb4d323ce6fd 31 MODDMA::Enable(CHANNELS ChannelNumber)
AjK 8:cb4d323ce6fd 32 {
AjK 8:cb4d323ce6fd 33 LPC_GPDMACH_TypeDef *pChannel = (LPC_GPDMACH_TypeDef *)Channel_p( ChannelNumber );
AjK 8:cb4d323ce6fd 34 pChannel->DMACCConfig |= _E;
AjK 8:cb4d323ce6fd 35 }
AjK 8:cb4d323ce6fd 36
AjK 8:cb4d323ce6fd 37 bool
AjK 8:cb4d323ce6fd 38 MODDMA::Enabled(CHANNELS ChannelNumber)
AjK 8:cb4d323ce6fd 39 {
hudakz 18:31f858967e93 40 LPC_GPDMACH_TypeDef *pChannel = (LPC_GPDMACH_TypeDef *)Channel_p( ChannelNumber );
AjK 8:cb4d323ce6fd 41 return (bool)(pChannel->DMACCConfig & _E);
AjK 8:cb4d323ce6fd 42 }
AjK 8:cb4d323ce6fd 43
AjK 8:cb4d323ce6fd 44 void
AjK 8:cb4d323ce6fd 45 MODDMA::Disable(CHANNELS ChannelNumber)
AjK 8:cb4d323ce6fd 46 {
AjK 8:cb4d323ce6fd 47 LPC_GPDMACH_TypeDef *pChannel = (LPC_GPDMACH_TypeDef *)Channel_p( ChannelNumber );
AjK 8:cb4d323ce6fd 48 pChannel->DMACCConfig &= ~(_E);
AjK 8:cb4d323ce6fd 49 }
AjK 8:cb4d323ce6fd 50
AjK 8:cb4d323ce6fd 51 bool
AjK 8:cb4d323ce6fd 52 MODDMA::isActive(CHANNELS ChannelNumber)
AjK 8:cb4d323ce6fd 53 {
AjK 8:cb4d323ce6fd 54 LPC_GPDMACH_TypeDef *pChannel = (LPC_GPDMACH_TypeDef *)Channel_p( ChannelNumber );
AjK 8:cb4d323ce6fd 55 return (bool)( pChannel->DMACCConfig & CxConfig_A() ) ;
AjK 8:cb4d323ce6fd 56 }
AjK 8:cb4d323ce6fd 57
hudakz 18:31f858967e93 58 void
AjK 8:cb4d323ce6fd 59 MODDMA::haltChannel(CHANNELS ChannelNumber)
AjK 8:cb4d323ce6fd 60 {
AjK 8:cb4d323ce6fd 61 LPC_GPDMACH_TypeDef *pChannel = (LPC_GPDMACH_TypeDef *)Channel_p( ChannelNumber );
AjK 8:cb4d323ce6fd 62 pChannel->DMACCConfig |= CxConfig_H();
AjK 8:cb4d323ce6fd 63 }
AjK 8:cb4d323ce6fd 64
hudakz 18:31f858967e93 65 uint32_t
AjK 8:cb4d323ce6fd 66 MODDMA::getControl(CHANNELS ChannelNumber)
AjK 8:cb4d323ce6fd 67 {
AjK 8:cb4d323ce6fd 68 LPC_GPDMACH_TypeDef *pChannel = (LPC_GPDMACH_TypeDef *)Channel_p( ChannelNumber );
AjK 8:cb4d323ce6fd 69 return pChannel->DMACCControl;
AjK 8:cb4d323ce6fd 70 }
AjK 8:cb4d323ce6fd 71
AjK 8:cb4d323ce6fd 72 uint32_t oldDMAHandler = 0;
AjK 8:cb4d323ce6fd 73 typedef void (*MODDMA_FN)(void);
AjK 8:cb4d323ce6fd 74
AjK 8:cb4d323ce6fd 75 extern "C" void MODDMA_IRQHandler(void) {
AjK 8:cb4d323ce6fd 76 uint32_t channel_mask;
hudakz 18:31f858967e93 77
AjK 8:cb4d323ce6fd 78 if (moddma_p == (class MODDMA *)NULL) {
AjK 8:cb4d323ce6fd 79 if (oldDMAHandler) {
AjK 8:cb4d323ce6fd 80 ((MODDMA_FN)oldDMAHandler)();
AjK 8:cb4d323ce6fd 81 return;
AjK 8:cb4d323ce6fd 82 }
AjK 8:cb4d323ce6fd 83 else {
AjK 8:cb4d323ce6fd 84 error("Interrupt without instance");
AjK 8:cb4d323ce6fd 85 }
AjK 8:cb4d323ce6fd 86 }
hudakz 18:31f858967e93 87
AjK 8:cb4d323ce6fd 88 for (int channel_number = 0; channel_number < 8; channel_number++) {
AjK 8:cb4d323ce6fd 89 channel_mask = (1UL << channel_number);
AjK 8:cb4d323ce6fd 90 if (LPC_GPDMA->DMACIntStat & channel_mask) {
AjK 8:cb4d323ce6fd 91 if (LPC_GPDMA->DMACIntTCStat & channel_mask) {
AjK 8:cb4d323ce6fd 92 if (moddma_p->setups[channel_number] != (MODDMA_Config *)NULL) {
AjK 8:cb4d323ce6fd 93 moddma_p->setIrqProcessingChannel((MODDMA::CHANNELS)channel_number);
AjK 8:cb4d323ce6fd 94 moddma_p->setIrqType(MODDMA::TcIrq);
hudakz 18:31f858967e93 95 if (moddma_p->setups[channel_number]->isrIntTCStat != NULL)
hudakz 18:31f858967e93 96 moddma_p->setups[channel_number]->isrIntTCStat.call();
hudakz 18:31f858967e93 97 if (moddma_p->isrIntTCStat != NULL)
hudakz 18:31f858967e93 98 moddma_p->isrIntTCStat.call();
AjK 8:cb4d323ce6fd 99 // The user callback should clear the IRQ. But if they forget
AjK 8:cb4d323ce6fd 100 // then the Mbed will lockup. So, check to see if the IRQ has
AjK 8:cb4d323ce6fd 101 // been dismissed, if not, we will dismiss it here.
AjK 8:cb4d323ce6fd 102 if (LPC_GPDMA->DMACIntTCStat & channel_mask) {
AjK 8:cb4d323ce6fd 103 LPC_GPDMA->DMACIntTCClear = channel_mask;
AjK 8:cb4d323ce6fd 104 }
AjK 8:cb4d323ce6fd 105 // If the user has left the channel enabled, disable it.
AjK 8:cb4d323ce6fd 106 // Note, we don't check Active here as it may block inside
AjK 8:cb4d323ce6fd 107 // an ISR, we just shut it down immediately. If the user
AjK 8:cb4d323ce6fd 108 // must wait for completion they should implement their
AjK 8:cb4d323ce6fd 109 // own ISR. But only disable if the LLI linked list register
AjK 8:cb4d323ce6fd 110 // is null otherwise we can crap out a series of transfers.
AjK 8:cb4d323ce6fd 111 if (moddma_p->Enabled( (MODDMA::CHANNELS)channel_number )) {
AjK 8:cb4d323ce6fd 112 if (moddma_p->lli( (MODDMA::CHANNELS)channel_number ) == 0 ) {
hudakz 18:31f858967e93 113 moddma_p->Disable( (MODDMA::CHANNELS)channel_number );
AjK 8:cb4d323ce6fd 114 }
AjK 8:cb4d323ce6fd 115 }
hudakz 18:31f858967e93 116 }
AjK 8:cb4d323ce6fd 117 }
hudakz 18:31f858967e93 118
AjK 8:cb4d323ce6fd 119 if (LPC_GPDMA->DMACIntErrStat & channel_mask) {
AjK 8:cb4d323ce6fd 120 if (moddma_p->setups[channel_number] != (MODDMA_Config *)NULL) {
AjK 8:cb4d323ce6fd 121 moddma_p->setIrqProcessingChannel((MODDMA::CHANNELS)channel_number);
AjK 8:cb4d323ce6fd 122 moddma_p->setIrqType(MODDMA::ErrIrq);
hudakz 18:31f858967e93 123 if (moddma_p->setups[channel_number]->isrIntErrStat != NULL)
hudakz 18:31f858967e93 124 moddma_p->setups[channel_number]->isrIntErrStat.call();
hudakz 18:31f858967e93 125 if (moddma_p->isrIntErrStat != NULL)
hudakz 18:31f858967e93 126 moddma_p->isrIntErrStat.call();
AjK 8:cb4d323ce6fd 127 // The user callback should clear the IRQ. But if they forget
AjK 8:cb4d323ce6fd 128 // then the Mbed will lockup. So, check to see if the IRQ has
AjK 8:cb4d323ce6fd 129 // been dismissed, if not, we will dismiss it here.
AjK 8:cb4d323ce6fd 130 if (LPC_GPDMA->DMACIntErrStat & channel_mask) {
AjK 8:cb4d323ce6fd 131 LPC_GPDMA->DMACIntErrClr = channel_mask;
AjK 8:cb4d323ce6fd 132 }
AjK 8:cb4d323ce6fd 133 // If the user has left the channel enabled, disable it.
AjK 8:cb4d323ce6fd 134 // Not, we don't check Active here as it may block inside
AjK 8:cb4d323ce6fd 135 // an ISR, we just shut it down immediately. If the user
AjK 8:cb4d323ce6fd 136 // must wait for completion they should implement their
AjK 8:cb4d323ce6fd 137 // own ISR. But only disable if the LLI linked list register
AjK 8:cb4d323ce6fd 138 // is null otherwise we can crap out a series of transfers.
AjK 8:cb4d323ce6fd 139 if (moddma_p->Enabled( (MODDMA::CHANNELS)channel_number )) {
AjK 8:cb4d323ce6fd 140 if (moddma_p->lli( (MODDMA::CHANNELS)channel_number ) == 0 ) {
hudakz 18:31f858967e93 141 moddma_p->Disable( (MODDMA::CHANNELS)channel_number );
AjK 8:cb4d323ce6fd 142 }
AjK 8:cb4d323ce6fd 143 }
hudakz 18:31f858967e93 144 }
AjK 8:cb4d323ce6fd 145 }
AjK 8:cb4d323ce6fd 146 }
AjK 8:cb4d323ce6fd 147 }
hudakz 18:31f858967e93 148
AjK 8:cb4d323ce6fd 149 /* IRQ should be handled by now, check to make sure. */
AjK 8:cb4d323ce6fd 150 if (LPC_GPDMA->DMACIntStat) {
AjK 8:cb4d323ce6fd 151 ((MODDMA_FN)oldDMAHandler)();
AjK 8:cb4d323ce6fd 152 LPC_GPDMA->DMACIntTCClear = (uint32_t)0xFF; /* If not, clear anyway! */
AjK 8:cb4d323ce6fd 153 }
AjK 8:cb4d323ce6fd 154 if (LPC_GPDMA->DMACIntErrStat) {
AjK 8:cb4d323ce6fd 155 ((MODDMA_FN)oldDMAHandler)();
AjK 8:cb4d323ce6fd 156 LPC_GPDMA->DMACIntErrClr = (uint32_t)0xFF; /* If not, clear anyway! */
AjK 8:cb4d323ce6fd 157 }
AjK 8:cb4d323ce6fd 158 }
AjK 8:cb4d323ce6fd 159
hudakz 18:31f858967e93 160 }