Ken Todotani
Memory to Memory DMA demo from CMSIS example. This demo execute 1000 times of 32 word memory to memory DMA (copy), and also measures number of dummy loop execution during DMA cylcles. Line 56 of "DMA_M2M.c" can change DMA source. where; 1)static : source is SRAM 2)const : source is Flash ROM
GPDMA_Channel_CFG_Type Struct Reference
[GPDMA Public Types]
GPDMA Channel configuration structure type definition. More...
#include <lpc17xx_gpdma.h>
Data Fields | |
| uint32_t | ChannelNum |
| DMA channel number, should be in range from 0 to 7. | |
| uint32_t | TransferSize |
| Length/Size of transfer. | |
| uint32_t | TransferWidth |
| Transfer width - used for TransferType is GPDMA_TRANSFERTYPE_M2M only. | |
| uint32_t | SrcMemAddr |
| Physical Source Address, used in case TransferType is chosen as GPDMA_TRANSFERTYPE_M2M or GPDMA_TRANSFERTYPE_M2P. | |
| uint32_t | DstMemAddr |
| Physical Destination Address, used in case TransferType is chosen as GPDMA_TRANSFERTYPE_M2M or GPDMA_TRANSFERTYPE_P2M. | |
| uint32_t | TransferType |
Transfer Type, should be one of the following:
| |
| uint32_t | SrcConn |
Peripheral Source Connection type, used in case TransferType is chosen as GPDMA_TRANSFERTYPE_P2M or GPDMA_TRANSFERTYPE_P2P, should be one of following:
| |
| uint32_t | DstConn |
Peripheral Destination Connection type, used in case TransferType is chosen as GPDMA_TRANSFERTYPE_M2P or GPDMA_TRANSFERTYPE_P2P, should be one of following:
| |
| uint32_t | DMALLI |
| Linker List Item structure data address if there's no Linker List, set as '0'. | |
Detailed Description
GPDMA Channel configuration structure type definition.
Definition at line 314 of file lpc17xx_gpdma.h.
Field Documentation
| uint32_t ChannelNum |
DMA channel number, should be in range from 0 to 7.
Note: DMA channel 0 has the highest priority and DMA channel 7 the lowest priority.
Definition at line 315 of file lpc17xx_gpdma.h.
| uint32_t DMALLI |
Linker List Item structure data address if there's no Linker List, set as '0'.
Definition at line 372 of file lpc17xx_gpdma.h.
| uint32_t DstConn |
Peripheral Destination Connection type, used in case TransferType is chosen as GPDMA_TRANSFERTYPE_M2P or GPDMA_TRANSFERTYPE_P2P, should be one of following:
- GPDMA_CONN_SSP0_Tx: SSP0, Tx
- GPDMA_CONN_SSP0_Rx: SSP0, Rx
- GPDMA_CONN_SSP1_Tx: SSP1, Tx
- GPDMA_CONN_SSP1_Rx: SSP1, Rx
- GPDMA_CONN_ADC: ADC
- GPDMA_CONN_I2S_Channel_0: I2S Channel 0
- GPDMA_CONN_I2S_Channel_1: I2S Channel 1
- GPDMA_CONN_DAC: DAC
- GPDMA_CONN_UART0_Tx_MAT0_0: UART0 Tx / MAT0.0
- GPDMA_CONN_UART0_Rx_MAT0_1: UART0 Rx / MAT0.1
- GPDMA_CONN_UART1_Tx_MAT1_0: UART1 Tx / MAT1.0
- GPDMA_CONN_UART1_Rx_MAT1_1: UART1 Rx / MAT1.1
- GPDMA_CONN_UART2_Tx_MAT2_0: UART2 Tx / MAT2.0
- GPDMA_CONN_UART2_Rx_MAT2_1: UART2 Rx / MAT2.1
- GPDMA_CONN_UART3_Tx_MAT3_0: UART3 Tx / MAT3.0
- GPDMA_CONN_UART3_Rx_MAT3_1: UART3 Rx / MAT3.1.
Definition at line 352 of file lpc17xx_gpdma.h.
| uint32_t DstMemAddr |
Physical Destination Address, used in case TransferType is chosen as GPDMA_TRANSFERTYPE_M2M or GPDMA_TRANSFERTYPE_P2M.
Definition at line 324 of file lpc17xx_gpdma.h.
| uint32_t SrcConn |
Peripheral Source Connection type, used in case TransferType is chosen as GPDMA_TRANSFERTYPE_P2M or GPDMA_TRANSFERTYPE_P2P, should be one of following:
- GPDMA_CONN_SSP0_Tx: SSP0, Tx
- GPDMA_CONN_SSP0_Rx: SSP0, Rx
- GPDMA_CONN_SSP1_Tx: SSP1, Tx
- GPDMA_CONN_SSP1_Rx: SSP1, Rx
- GPDMA_CONN_ADC: ADC
- GPDMA_CONN_I2S_Channel_0: I2S Channel 0
- GPDMA_CONN_I2S_Channel_1: I2S Channel 1
- GPDMA_CONN_DAC: DAC
- GPDMA_CONN_UART0_Tx_MAT0_0: UART0 Tx / MAT0.0
- GPDMA_CONN_UART0_Rx_MAT0_1: UART0 Rx / MAT0.1
- GPDMA_CONN_UART1_Tx_MAT1_0: UART1 Tx / MAT1.0
- GPDMA_CONN_UART1_Rx_MAT1_1: UART1 Rx / MAT1.1
- GPDMA_CONN_UART2_Tx_MAT2_0: UART2 Tx / MAT2.0
- GPDMA_CONN_UART2_Rx_MAT2_1: UART2 Rx / MAT2.1
- GPDMA_CONN_UART3_Tx_MAT3_0: UART3 Tx / MAT3.0
- GPDMA_CONN_UART3_Rx_MAT3_1: UART3 Rx / MAT3.1.
Definition at line 332 of file lpc17xx_gpdma.h.
| uint32_t SrcMemAddr |
Physical Source Address, used in case TransferType is chosen as GPDMA_TRANSFERTYPE_M2M or GPDMA_TRANSFERTYPE_M2P.
Definition at line 322 of file lpc17xx_gpdma.h.
| uint32_t TransferSize |
Length/Size of transfer.
Definition at line 320 of file lpc17xx_gpdma.h.
| uint32_t TransferType |
Transfer Type, should be one of the following:
- GPDMA_TRANSFERTYPE_M2M: Memory to memory - DMA control
- GPDMA_TRANSFERTYPE_M2P: Memory to peripheral - DMA control
- GPDMA_TRANSFERTYPE_P2M: Peripheral to memory - DMA control
- GPDMA_TRANSFERTYPE_P2P: Source peripheral to destination peripheral - DMA control.
Definition at line 326 of file lpc17xx_gpdma.h.
| uint32_t TransferWidth |
Transfer width - used for TransferType is GPDMA_TRANSFERTYPE_M2M only.
Definition at line 321 of file lpc17xx_gpdma.h.
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