Suga koubou / Mbed 2 deprecated SPIRAM_23LC1024_DMA

SPI RAM 23LC1024 (Microchip) with DMA

Dependencies:   mbed

Fork of SPIRAM_23LC1024 by Suga koubou

MODDMA/MODDMA.cpp@2:a3e0f7f37ac9, 2012-12-05 (annotated)

Committer:
okini3939
Date:
Wed Dec 05 07:56:09 2012 +0000
Revision:
2:a3e0f7f37ac9
DMX

Who changed what in which revision?

UserRevisionLine numberNew contents of line
okini3939 2:a3e0f7f37ac9 1 /*
okini3939 2:a3e0f7f37ac9 2 Copyright (c) 2010 Andy Kirkham
okini3939 2:a3e0f7f37ac9 3
okini3939 2:a3e0f7f37ac9 4 Permission is hereby granted, free of charge, to any person obtaining a copy
okini3939 2:a3e0f7f37ac9 5 of this software and associated documentation files (the "Software"), to deal
okini3939 2:a3e0f7f37ac9 6 in the Software without restriction, including without limitation the rights
okini3939 2:a3e0f7f37ac9 7 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
okini3939 2:a3e0f7f37ac9 8 copies of the Software, and to permit persons to whom the Software is
okini3939 2:a3e0f7f37ac9 9 furnished to do so, subject to the following conditions:
okini3939 2:a3e0f7f37ac9 10
okini3939 2:a3e0f7f37ac9 11 The above copyright notice and this permission notice shall be included in
okini3939 2:a3e0f7f37ac9 12 all copies or substantial portions of the Software.
okini3939 2:a3e0f7f37ac9 13
okini3939 2:a3e0f7f37ac9 14 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
okini3939 2:a3e0f7f37ac9 15 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
okini3939 2:a3e0f7f37ac9 16 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
okini3939 2:a3e0f7f37ac9 17 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
okini3939 2:a3e0f7f37ac9 18 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
okini3939 2:a3e0f7f37ac9 19 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
okini3939 2:a3e0f7f37ac9 20 THE SOFTWARE.
okini3939 2:a3e0f7f37ac9 21 */
okini3939 2:a3e0f7f37ac9 22 #include "iomacros.h"
okini3939 2:a3e0f7f37ac9 23 #include "MODDMA.h"
okini3939 2:a3e0f7f37ac9 24
okini3939 2:a3e0f7f37ac9 25 namespace AjK {
okini3939 2:a3e0f7f37ac9 26
okini3939 2:a3e0f7f37ac9 27 // Create a "hook" for our ISR to make callbacks. Set by init()
okini3939 2:a3e0f7f37ac9 28 class MODDMA *moddma_p = (class MODDMA *)NULL;
okini3939 2:a3e0f7f37ac9 29
okini3939 2:a3e0f7f37ac9 30 void
okini3939 2:a3e0f7f37ac9 31 MODDMA::Enable(CHANNELS ChannelNumber)
okini3939 2:a3e0f7f37ac9 32 {
okini3939 2:a3e0f7f37ac9 33 LPC_GPDMACH_TypeDef *pChannel = (LPC_GPDMACH_TypeDef *)Channel_p( ChannelNumber );
okini3939 2:a3e0f7f37ac9 34 pChannel->DMACCConfig |= _E;
okini3939 2:a3e0f7f37ac9 35 }
okini3939 2:a3e0f7f37ac9 36
okini3939 2:a3e0f7f37ac9 37 bool
okini3939 2:a3e0f7f37ac9 38 MODDMA::Enabled(CHANNELS ChannelNumber)
okini3939 2:a3e0f7f37ac9 39 {
okini3939 2:a3e0f7f37ac9 40 LPC_GPDMACH_TypeDef *pChannel = (LPC_GPDMACH_TypeDef *)Channel_p( ChannelNumber );
okini3939 2:a3e0f7f37ac9 41 return (bool)(pChannel->DMACCConfig & _E);
okini3939 2:a3e0f7f37ac9 42 }
okini3939 2:a3e0f7f37ac9 43
okini3939 2:a3e0f7f37ac9 44 void
okini3939 2:a3e0f7f37ac9 45 MODDMA::Disable(CHANNELS ChannelNumber)
okini3939 2:a3e0f7f37ac9 46 {
okini3939 2:a3e0f7f37ac9 47 LPC_GPDMACH_TypeDef *pChannel = (LPC_GPDMACH_TypeDef *)Channel_p( ChannelNumber );
okini3939 2:a3e0f7f37ac9 48 pChannel->DMACCConfig &= ~(_E);
okini3939 2:a3e0f7f37ac9 49 }
okini3939 2:a3e0f7f37ac9 50
okini3939 2:a3e0f7f37ac9 51 bool
okini3939 2:a3e0f7f37ac9 52 MODDMA::isActive(CHANNELS ChannelNumber)
okini3939 2:a3e0f7f37ac9 53 {
okini3939 2:a3e0f7f37ac9 54 LPC_GPDMACH_TypeDef *pChannel = (LPC_GPDMACH_TypeDef *)Channel_p( ChannelNumber );
okini3939 2:a3e0f7f37ac9 55 return (bool)( pChannel->DMACCConfig & CxConfig_A() ) ;
okini3939 2:a3e0f7f37ac9 56 }
okini3939 2:a3e0f7f37ac9 57
okini3939 2:a3e0f7f37ac9 58 void
okini3939 2:a3e0f7f37ac9 59 MODDMA::haltChannel(CHANNELS ChannelNumber)
okini3939 2:a3e0f7f37ac9 60 {
okini3939 2:a3e0f7f37ac9 61 LPC_GPDMACH_TypeDef *pChannel = (LPC_GPDMACH_TypeDef *)Channel_p( ChannelNumber );
okini3939 2:a3e0f7f37ac9 62 pChannel->DMACCConfig |= CxConfig_H();
okini3939 2:a3e0f7f37ac9 63 }
okini3939 2:a3e0f7f37ac9 64
okini3939 2:a3e0f7f37ac9 65 uint32_t
okini3939 2:a3e0f7f37ac9 66 MODDMA::getControl(CHANNELS ChannelNumber)
okini3939 2:a3e0f7f37ac9 67 {
okini3939 2:a3e0f7f37ac9 68 LPC_GPDMACH_TypeDef *pChannel = (LPC_GPDMACH_TypeDef *)Channel_p( ChannelNumber );
okini3939 2:a3e0f7f37ac9 69 return pChannel->DMACCControl;
okini3939 2:a3e0f7f37ac9 70 }
okini3939 2:a3e0f7f37ac9 71
okini3939 2:a3e0f7f37ac9 72 uint32_t oldDMAHandler = 0;
okini3939 2:a3e0f7f37ac9 73 typedef void (*MODDMA_FN)(void);
okini3939 2:a3e0f7f37ac9 74
okini3939 2:a3e0f7f37ac9 75 extern "C" void MODDMA_IRQHandler(void) {
okini3939 2:a3e0f7f37ac9 76 uint32_t channel_mask;
okini3939 2:a3e0f7f37ac9 77
okini3939 2:a3e0f7f37ac9 78 if (moddma_p == (class MODDMA *)NULL) {
okini3939 2:a3e0f7f37ac9 79 if (oldDMAHandler) {
okini3939 2:a3e0f7f37ac9 80 ((MODDMA_FN)oldDMAHandler)();
okini3939 2:a3e0f7f37ac9 81 return;
okini3939 2:a3e0f7f37ac9 82 }
okini3939 2:a3e0f7f37ac9 83 else {
okini3939 2:a3e0f7f37ac9 84 error("Interrupt without instance");
okini3939 2:a3e0f7f37ac9 85 }
okini3939 2:a3e0f7f37ac9 86 }
okini3939 2:a3e0f7f37ac9 87
okini3939 2:a3e0f7f37ac9 88 for (int channel_number = 0; channel_number < 8; channel_number++) {
okini3939 2:a3e0f7f37ac9 89 channel_mask = (1UL << channel_number);
okini3939 2:a3e0f7f37ac9 90 if (LPC_GPDMA->DMACIntStat & channel_mask) {
okini3939 2:a3e0f7f37ac9 91 if (LPC_GPDMA->DMACIntTCStat & channel_mask) {
okini3939 2:a3e0f7f37ac9 92 if (moddma_p->setups[channel_number] != (MODDMA_Config *)NULL) {
okini3939 2:a3e0f7f37ac9 93 moddma_p->setIrqProcessingChannel((MODDMA::CHANNELS)channel_number);
okini3939 2:a3e0f7f37ac9 94 moddma_p->setIrqType(MODDMA::TcIrq);
okini3939 2:a3e0f7f37ac9 95 moddma_p->setups[channel_number]->isrIntTCStat->call();
okini3939 2:a3e0f7f37ac9 96 moddma_p->isrIntTCStat.call();
okini3939 2:a3e0f7f37ac9 97 // The user callback should clear the IRQ. But if they forget
okini3939 2:a3e0f7f37ac9 98 // then the Mbed will lockup. So, check to see if the IRQ has
okini3939 2:a3e0f7f37ac9 99 // been dismissed, if not, we will dismiss it here.
okini3939 2:a3e0f7f37ac9 100 if (LPC_GPDMA->DMACIntTCStat & channel_mask) {
okini3939 2:a3e0f7f37ac9 101 LPC_GPDMA->DMACIntTCClear = channel_mask;
okini3939 2:a3e0f7f37ac9 102 }
okini3939 2:a3e0f7f37ac9 103 // If the user has left the channel enabled, disable it.
okini3939 2:a3e0f7f37ac9 104 // Note, we don't check Active here as it may block inside
okini3939 2:a3e0f7f37ac9 105 // an ISR, we just shut it down immediately. If the user
okini3939 2:a3e0f7f37ac9 106 // must wait for completion they should implement their
okini3939 2:a3e0f7f37ac9 107 // own ISR. But only disable if the LLI linked list register
okini3939 2:a3e0f7f37ac9 108 // is null otherwise we can crap out a series of transfers.
okini3939 2:a3e0f7f37ac9 109 if (moddma_p->Enabled( (MODDMA::CHANNELS)channel_number )) {
okini3939 2:a3e0f7f37ac9 110 if (moddma_p->lli( (MODDMA::CHANNELS)channel_number ) == 0 ) {
okini3939 2:a3e0f7f37ac9 111 moddma_p->Disable( (MODDMA::CHANNELS)channel_number );
okini3939 2:a3e0f7f37ac9 112 }
okini3939 2:a3e0f7f37ac9 113 }
okini3939 2:a3e0f7f37ac9 114 }
okini3939 2:a3e0f7f37ac9 115 }
okini3939 2:a3e0f7f37ac9 116
okini3939 2:a3e0f7f37ac9 117 if (LPC_GPDMA->DMACIntErrStat & channel_mask) {
okini3939 2:a3e0f7f37ac9 118 if (moddma_p->setups[channel_number] != (MODDMA_Config *)NULL) {
okini3939 2:a3e0f7f37ac9 119 moddma_p->setIrqProcessingChannel((MODDMA::CHANNELS)channel_number);
okini3939 2:a3e0f7f37ac9 120 moddma_p->setIrqType(MODDMA::ErrIrq);
okini3939 2:a3e0f7f37ac9 121 moddma_p->setups[channel_number]->isrIntErrStat->call();
okini3939 2:a3e0f7f37ac9 122 moddma_p->isrIntErrStat.call();
okini3939 2:a3e0f7f37ac9 123 // The user callback should clear the IRQ. But if they forget
okini3939 2:a3e0f7f37ac9 124 // then the Mbed will lockup. So, check to see if the IRQ has
okini3939 2:a3e0f7f37ac9 125 // been dismissed, if not, we will dismiss it here.
okini3939 2:a3e0f7f37ac9 126 if (LPC_GPDMA->DMACIntErrStat & channel_mask) {
okini3939 2:a3e0f7f37ac9 127 LPC_GPDMA->DMACIntErrClr = channel_mask;
okini3939 2:a3e0f7f37ac9 128 }
okini3939 2:a3e0f7f37ac9 129 // If the user has left the channel enabled, disable it.
okini3939 2:a3e0f7f37ac9 130 // Not, we don't check Active here as it may block inside
okini3939 2:a3e0f7f37ac9 131 // an ISR, we just shut it down immediately. If the user
okini3939 2:a3e0f7f37ac9 132 // must wait for completion they should implement their
okini3939 2:a3e0f7f37ac9 133 // own ISR. But only disable if the LLI linked list register
okini3939 2:a3e0f7f37ac9 134 // is null otherwise we can crap out a series of transfers.
okini3939 2:a3e0f7f37ac9 135 if (moddma_p->Enabled( (MODDMA::CHANNELS)channel_number )) {
okini3939 2:a3e0f7f37ac9 136 if (moddma_p->lli( (MODDMA::CHANNELS)channel_number ) == 0 ) {
okini3939 2:a3e0f7f37ac9 137 moddma_p->Disable( (MODDMA::CHANNELS)channel_number );
okini3939 2:a3e0f7f37ac9 138 }
okini3939 2:a3e0f7f37ac9 139 }
okini3939 2:a3e0f7f37ac9 140 }
okini3939 2:a3e0f7f37ac9 141 }
okini3939 2:a3e0f7f37ac9 142 }
okini3939 2:a3e0f7f37ac9 143 }
okini3939 2:a3e0f7f37ac9 144
okini3939 2:a3e0f7f37ac9 145 /* IRQ should be handled by now, check to make sure. */
okini3939 2:a3e0f7f37ac9 146 if (LPC_GPDMA->DMACIntStat) {
okini3939 2:a3e0f7f37ac9 147 ((MODDMA_FN)oldDMAHandler)();
okini3939 2:a3e0f7f37ac9 148 LPC_GPDMA->DMACIntTCClear = (uint32_t)0xFF; /* If not, clear anyway! */
okini3939 2:a3e0f7f37ac9 149 }
okini3939 2:a3e0f7f37ac9 150 if (LPC_GPDMA->DMACIntErrStat) {
okini3939 2:a3e0f7f37ac9 151 ((MODDMA_FN)oldDMAHandler)();
okini3939 2:a3e0f7f37ac9 152 LPC_GPDMA->DMACIntErrClr = (uint32_t)0xFF; /* If not, clear anyway! */
okini3939 2:a3e0f7f37ac9 153 }
okini3939 2:a3e0f7f37ac9 154 }
okini3939 2:a3e0f7f37ac9 155
okini3939 2:a3e0f7f37ac9 156 }; // namespace AjK ends
okini3939 2:a3e0f7f37ac9 157