217 lines
8.8 KiB
C
217 lines
8.8 KiB
C
/*
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* @brief GPDMA Registers and control functions
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*
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* @note
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* Copyright(C) NXP Semiconductors, 2012
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* All rights reserved.
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*
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* @par
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* Software that is described herein is for illustrative purposes only
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* which provides customers with programming information regarding the
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* LPC products. This software is supplied "AS IS" without any warranties of
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* any kind, and NXP Semiconductors and its licensor disclaim any and
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* all warranties, express or implied, including all implied warranties of
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* merchantability, fitness for a particular purpose and non-infringement of
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* intellectual property rights. NXP Semiconductors assumes no responsibility
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* or liability for the use of the software, conveys no license or rights under any
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* patent, copyright, mask work right, or any other intellectual property rights in
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* or to any products. NXP Semiconductors reserves the right to make changes
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* in the software without notification. NXP Semiconductors also makes no
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* representation or warranty that such application will be suitable for the
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* specified use without further testing or modification.
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*
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* @par
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* Permission to use, copy, modify, and distribute this software and its
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* documentation is hereby granted, under NXP Semiconductors' and its
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* licensor's relevant copyrights in the software, without fee, provided that it
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* is used in conjunction with NXP Semiconductors microcontrollers. This
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* copyright, permission, and disclaimer notice must appear in all copies of
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* this code.
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*/
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#include "gpdma_001.h"
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/*****************************************************************************
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* Private types/enumerations/variables
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****************************************************************************/
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/*****************************************************************************
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* Public types/enumerations/variables
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****************************************************************************/
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/*****************************************************************************
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* Private functions
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****************************************************************************/
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/*****************************************************************************
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* Public functions
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****************************************************************************/
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/* Initialize the GPDMA */
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void IP_GPDMA_Init(IP_GPDMA_001_Type *pGPDMA) {
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uint8_t i;
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/* Reset all channel configuration register */
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for (i = 8; i > 0; i--) {
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pGPDMA->CH[i - 1].CONFIG = 0;
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}
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/* Clear all DMA interrupt and error flag */
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pGPDMA->INTTCCLEAR = 0xFF;
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pGPDMA->INTERRCLR = 0xFF;
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}
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/* Read the status from different registers according to the type */
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IntStatus IP_GPDMA_IntGetStatus(IP_GPDMA_001_Type *pGPDMA, GPDMA_Status_Type type, uint8_t channel) {
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/**
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* TODO check the channel <=8 type is esxited
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*/
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switch (type) {
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case GPDMA_STAT_INT:/* check status of DMA channel interrupts */
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return (IntStatus) (pGPDMA->INTSTAT & (((1UL << channel) & 0xFF)));
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case GPDMA_STAT_INTTC: /* check terminal count interrupt request status for DMA */
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return (IntStatus) (pGPDMA->INTTCSTAT & (((1UL << channel) & 0xFF)));
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case GPDMA_STAT_INTERR: /* check interrupt status for DMA channels */
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return (IntStatus) (pGPDMA->INTERRSTAT & (((1UL << channel) & 0xFF)));
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case GPDMA_STAT_RAWINTTC: /* check status of the terminal count interrupt for DMA channels */
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return (IntStatus) (pGPDMA->RAWINTTCSTAT & (((1UL << channel) & 0xFF)));
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case GPDMA_STAT_RAWINTERR: /* check status of the error interrupt for DMA channels */
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return (IntStatus) (pGPDMA->RAWINTERRSTAT & (((1UL << channel) & 0xFF)));
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default:/* check enable status for DMA channels */
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return (IntStatus) (pGPDMA->ENBLDCHNS & (((1UL << channel) & 0xFF)));
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}
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}
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/* Clear the Interrupt Flag from different registers according to the type */
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void IP_GPDMA_ClearIntPending(IP_GPDMA_001_Type *pGPDMA, GPDMA_StateClear_Type type, uint8_t channel) {
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if (type == GPDMA_STATCLR_INTTC) {
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/* clears the terminal count interrupt request on DMA channel */
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pGPDMA->INTTCCLEAR = (((1UL << (channel)) & 0xFF));
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}
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else {
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/* clear the error interrupt request */
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pGPDMA->INTERRCLR = (((1UL << (channel)) & 0xFF));
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}
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}
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/* Enable or Disable the GPDMA Channel */
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void IP_GPDMA_ChannelCmd(IP_GPDMA_001_Type *pGPDMA, uint8_t channelNum, FunctionalState NewState) {
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IP_GPDMA_001_CH_Type *pDMAch;
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/* Get Channel pointer */
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pDMAch = (IP_GPDMA_001_CH_Type *) &(pGPDMA->CH[channelNum]);
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if (NewState == ENABLE) {
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pDMAch->CONFIG |= GPDMA_DMACCxConfig_E;
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}
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else {
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pDMAch->CONFIG &= ~GPDMA_DMACCxConfig_E;
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}
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}
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/* Set up the DPDMA according to the specification configuration details */
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Status IP_GPDMA_Setup(IP_GPDMA_001_Type *pGPDMA,
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GPDMA_Channel_CFG_Type *GPDMAChannelConfig,
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uint32_t GPDMA_LUTPerBurstSrcConn,
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uint32_t GPDMA_LUTPerBurstDstConn,
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uint32_t GPDMA_LUTPerWidSrcConn,
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uint32_t GPDMA_LUTPerWidDstConn,
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uint32_t GPDMA_LUTPerAddrSrcConn,
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uint32_t GPDMA_LUTPerAddrDstConn,
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uint8_t SrcPeripheral,
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uint8_t DstPeripheral)
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{
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IP_GPDMA_001_CH_Type *pDMAch;
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if (pGPDMA->ENBLDCHNS & ((((1UL << (GPDMAChannelConfig->ChannelNum)) & 0xFF)))) {
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/* This channel is enabled, return ERROR, need to release this channel first */
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return ERROR;
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}
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/* Get Channel pointer */
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pDMAch = (IP_GPDMA_001_CH_Type *) &(pGPDMA->CH[GPDMAChannelConfig->ChannelNum]);
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/* Reset the Interrupt status */
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pGPDMA->INTTCCLEAR = (((1UL << (GPDMAChannelConfig->ChannelNum)) & 0xFF));
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pGPDMA->INTERRCLR = (((1UL << (GPDMAChannelConfig->ChannelNum)) & 0xFF));
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/* Assign Linker List Item value */
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pDMAch->LLI = 0;/* Fixed to 0 (no link list) */
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/* Enable DMA channels, little endian */
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pGPDMA->CONFIG = GPDMA_DMACConfig_E;
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while (!(pGPDMA->CONFIG & GPDMA_DMACConfig_E)) {}
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pDMAch->SRCADDR = GPDMAChannelConfig->SrcAddr;
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pDMAch->DESTADDR = GPDMAChannelConfig->DstAddr;
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/* Configure DMA Channel, enable Error Counter and Terminate counter */
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pDMAch->CONFIG = GPDMA_DMACCxConfig_IE
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| GPDMA_DMACCxConfig_ITC /*| GPDMA_DMACCxConfig_E*/
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| GPDMA_DMACCxConfig_TransferType((uint32_t) GPDMAChannelConfig->TransferType)
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| GPDMA_DMACCxConfig_SrcPeripheral(SrcPeripheral)
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| GPDMA_DMACCxConfig_DestPeripheral(DstPeripheral);
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switch (GPDMAChannelConfig->TransferType) {
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/* Memory to memory */
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case GPDMA_TRANSFERTYPE_M2M_CONTROLLER_DMA:
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pDMAch->CONTROL = GPDMA_DMACCxControl_TransferSize(GPDMAChannelConfig->TransferSize)
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| GPDMA_DMACCxControl_SBSize((4UL)) /**< Burst size = 32 */
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| GPDMA_DMACCxControl_DBSize((4UL)) /**< Burst size = 32 */
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| GPDMA_DMACCxControl_SWidth(GPDMAChannelConfig->TransferWidth)
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| GPDMA_DMACCxControl_DWidth(GPDMAChannelConfig->TransferWidth)
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| GPDMA_DMACCxControl_SI
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| GPDMA_DMACCxControl_DI
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| GPDMA_DMACCxControl_I;
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break;
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case GPDMA_TRANSFERTYPE_M2P_CONTROLLER_DMA:
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case GPDMA_TRANSFERTYPE_M2P_CONTROLLER_PERIPHERAL:
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pDMAch->CONTROL = GPDMA_DMACCxControl_TransferSize((uint32_t) GPDMAChannelConfig->TransferSize)
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| GPDMA_DMACCxControl_SBSize(GPDMA_LUTPerBurstDstConn)
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| GPDMA_DMACCxControl_DBSize(GPDMA_LUTPerBurstDstConn)
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| GPDMA_DMACCxControl_SWidth(GPDMA_LUTPerWidDstConn)
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| GPDMA_DMACCxControl_DWidth(GPDMA_LUTPerWidDstConn)
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| GPDMA_DMACCxControl_DestTransUseAHBMaster1
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| GPDMA_DMACCxControl_SI
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| GPDMA_DMACCxControl_I;
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break;
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case GPDMA_TRANSFERTYPE_P2M_CONTROLLER_DMA:
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case GPDMA_TRANSFERTYPE_P2M_CONTROLLER_PERIPHERAL:
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pDMAch->CONTROL = GPDMA_DMACCxControl_TransferSize((uint32_t) GPDMAChannelConfig->TransferSize)
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| GPDMA_DMACCxControl_SBSize(GPDMA_LUTPerBurstSrcConn)
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| GPDMA_DMACCxControl_DBSize(GPDMA_LUTPerBurstSrcConn)
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| GPDMA_DMACCxControl_SWidth(GPDMA_LUTPerWidSrcConn)
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| GPDMA_DMACCxControl_DWidth(GPDMA_LUTPerWidSrcConn)
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| GPDMA_DMACCxControl_SrcTransUseAHBMaster1
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| GPDMA_DMACCxControl_DI
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| GPDMA_DMACCxControl_I;
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break;
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case GPDMA_TRANSFERTYPE_P2P_CONTROLLER_DMA:
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case GPDMA_TRANSFERTYPE_P2P_CONTROLLER_DestPERIPHERAL:
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case GPDMA_TRANSFERTYPE_P2P_CONTROLLER_SrcPERIPHERAL:
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pDMAch->CONTROL = GPDMA_DMACCxControl_TransferSize((uint32_t) GPDMAChannelConfig->TransferSize)
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| GPDMA_DMACCxControl_SBSize(GPDMA_LUTPerBurstSrcConn)
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| GPDMA_DMACCxControl_DBSize(GPDMA_LUTPerBurstDstConn)
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| GPDMA_DMACCxControl_SWidth(GPDMA_LUTPerWidSrcConn)
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| GPDMA_DMACCxControl_DWidth(GPDMA_LUTPerWidDstConn)
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| GPDMA_DMACCxControl_SrcTransUseAHBMaster1
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| GPDMA_DMACCxControl_DestTransUseAHBMaster1
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| GPDMA_DMACCxControl_I;
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break;
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/* Do not support any more transfer type, return ERROR */
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default:
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return ERROR;
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}
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return SUCCESS;
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}
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