/* Do a DMA transfer M2M, M2P,P2M or P2P */ void Chip_DMA_Transfer(uint8_t ChannelNum, uint32_t src, uint32_t dst, FlowControlType TransferType, uint32_t Size) { GPDMA_Channel_CFG_Type GPDMACfg; uint8_t SrcPeripheral = 0, DstPeripheral = 0; GPDMACfg.ChannelNum = ChannelNum; GPDMACfg.TransferType = TransferType; GPDMACfg.TransferSize = Size; switch (TransferType) { case GPDMA_TRANSFERTYPE_M2M_CONTROLLER_DMA: GPDMACfg.SrcAddr = (uint32_t) src; GPDMACfg.DstAddr = (uint32_t) dst; src = 0; dst = 0; GPDMACfg.TransferWidth = GPDMA_WIDTH_BYTE; break; case GPDMA_TRANSFERTYPE_M2P_CONTROLLER_DMA: case GPDMA_TRANSFERTYPE_M2P_CONTROLLER_PERIPHERAL: GPDMACfg.SrcAddr = (uint32_t) src; src = 0; GPDMACfg.DstAddr = (uint32_t) GPDMA_LUTPerAddr[dst]; DstPeripheral = DMAMUX_Config(dst); break; case GPDMA_TRANSFERTYPE_P2M_CONTROLLER_DMA: case GPDMA_TRANSFERTYPE_P2M_CONTROLLER_PERIPHERAL: GPDMACfg.SrcAddr = (uint32_t) GPDMA_LUTPerAddr[src]; GPDMACfg.DstAddr = (uint32_t) dst; SrcPeripheral = DMAMUX_Config(src); dst = 0; break; case GPDMA_TRANSFERTYPE_P2P_CONTROLLER_DMA: case GPDMA_TRANSFERTYPE_P2P_CONTROLLER_DestPERIPHERAL: case GPDMA_TRANSFERTYPE_P2P_CONTROLLER_SrcPERIPHERAL: GPDMACfg.SrcAddr = (uint32_t) GPDMA_LUTPerAddr[src]; GPDMACfg.DstAddr = (uint32_t) GPDMA_LUTPerAddr[dst]; SrcPeripheral = DMAMUX_Config(src); DstPeripheral = DMAMUX_Config(dst); break; default: break; } IP_GPDMA_Setup(LPC_GPDMA, &GPDMACfg, (uint32_t) GPDMA_LUTPerBurst[src], (uint32_t) GPDMA_LUTPerBurst[dst], (uint32_t) GPDMA_LUTPerWid[src], (uint32_t) GPDMA_LUTPerWid[dst], (uint32_t) GPDMA_LUTPerAddr[src], (uint32_t) GPDMA_LUTPerAddr[dst], SrcPeripheral, DstPeripheral); /* Start the Channel */ IP_GPDMA_ChannelCmd(LPC_GPDMA, ChannelNum, ENABLE); }
/* Stop a stream DMA transfer */ void Chip_DMA_Stop(uint8_t ChannelNum) { IP_GPDMA_ChannelCmd(LPC_GPDMA, (ChannelNum), DISABLE); if (Chip_GPDMA_IntGetStatus(GPDMA_STAT_INTTC, ChannelNum)) { /* Clear terminate counter Interrupt pending */ Chip_GPDMA_ClearIntPending(GPDMA_STATCLR_INTTC, ChannelNum); } if (Chip_GPDMA_IntGetStatus(GPDMA_STAT_INTERR, ChannelNum)) { /* Clear terminate counter Interrupt pending */ Chip_GPDMA_ClearIntPending(GPDMA_STATCLR_INTERR, ChannelNum); } ChannelHandlerArray[ChannelNum].ChannelStatus = DISABLE; }
/* Do a DMA transfer M2M, M2P,P2M or P2P */ Status Chip_DMA_Transfer(LPC_GPDMA_T *pGPDMA, uint8_t ChannelNum, uint32_t src, uint32_t dst, IP_GPDMA_FLOW_CONTROL_T TransferType, uint32_t Size) { GPDMA_Channel_CFG_T GPDMACfg; uint8_t SrcPeripheral = 0, DstPeripheral = 0; uint32_t cwrd; int ret; ret = Chip_DMA_InitChannelCfg(pGPDMA, &GPDMACfg, ChannelNum, src, dst, Size, TransferType); if (ret < 0) { return ERROR; } /* Adjust src/dst index if they are memory */ if (ret & 1) { src = 0; } else { SrcPeripheral = DMAMUX_Config(src); } if (ret & 2) { dst = 0; } else { DstPeripheral = DMAMUX_Config(dst); } cwrd = IP_GPDMA_MakeCtrlWord(&GPDMACfg, (uint32_t) GPDMA_LUTPerBurst[src], (uint32_t) GPDMA_LUTPerBurst[dst], (uint32_t) GPDMA_LUTPerWid[src], (uint32_t) GPDMA_LUTPerWid[dst]); if (IP_GPDMA_Setup(pGPDMA, &GPDMACfg, cwrd, 0, SrcPeripheral, DstPeripheral) == ERROR) { return ERROR; } /* Start the Channel */ IP_GPDMA_ChannelCmd(pGPDMA, ChannelNum, ENABLE); return SUCCESS; }
/* Do a DMA scatter-gather transfer M2M, M2P,P2M or P2P using DMA descriptors */ Status Chip_DMA_SGTransfer(LPC_GPDMA_T *pGPDMA, uint8_t ChannelNum, const DMA_TransferDescriptor_t *DMADescriptor, IP_GPDMA_FLOW_CONTROL_T TransferType) { const DMA_TransferDescriptor_t *dsc = DMADescriptor; GPDMA_Channel_CFG_T GPDMACfg; uint8_t SrcPeripheral = 0, DstPeripheral = 0; uint32_t src = DMADescriptor->src, dst = DMADescriptor->dst; int ret; ret = Chip_DMA_InitChannelCfg(pGPDMA, &GPDMACfg, ChannelNum, src, dst, 0, TransferType); if (ret < 0) { return ERROR; } /* Adjust src/dst index if they are memory */ if (ret & 1) { src = 0; } else { SrcPeripheral = DMAMUX_Config(src); } if (ret & 2) { dst = 0; } else { DstPeripheral = DMAMUX_Config(dst); } if (IP_GPDMA_Setup(pGPDMA, &GPDMACfg, dsc->ctrl, dsc->lli, SrcPeripheral, DstPeripheral) == ERROR) { return ERROR; } /* Start the Channel */ IP_GPDMA_ChannelCmd(pGPDMA, ChannelNum, ENABLE); return SUCCESS; }