1 Solution
Moderator
Hi,
The GPDMA section in the technical reference manual has more details about
the DMA under GPDMA section.
1. This is dependent on the source and destination of transfer. Kindly check the image attached
2. You can see the handshake step in both hardware and software handshake mechanisms. Its forwarded through DLR in hardware handshake.
With ISR request and register writes it is handled in software handshake.
3.Generally, the GPDMA tries to transfer the data using burst transactions and, where possible, fill or empty the channel FIFO in single bursts - provided that the software has not limited the burst length.
4. Before the transfer can begin the GPDMA and DLR units must be set up according to the user requirements. Once the peripheral (source or destination) is ready for a transaction it sends a service
request. This request is taken by the DLR which in turn forwards it to the GPDMA( See attached image above).This is repeated until the programmed transfer is complete.
5. In case of software handshake, before the transfer can begin the GPDMA and NVIC units must be set up according to the user requirements. Once the peripheral (source or destination) is ready for a transaction it sends a service
request to the CPU. The interrupt service routine then uses the software registers(eg: REQSRCREG), to initiate and control a DMA transaction. The GPDMA finally executes the transaction
Best Regards,
Vasanth
The GPDMA section in the technical reference manual has more details about
the DMA under GPDMA section.
1. This is dependent on the source and destination of transfer. Kindly check the image attached
2. You can see the handshake step in both hardware and software handshake mechanisms. Its forwarded through DLR in hardware handshake.
With ISR request and register writes it is handled in software handshake.
3.Generally, the GPDMA tries to transfer the data using burst transactions and, where possible, fill or empty the channel FIFO in single bursts - provided that the software has not limited the burst length.
4. Before the transfer can begin the GPDMA and DLR units must be set up according to the user requirements. Once the peripheral (source or destination) is ready for a transaction it sends a service
request. This request is taken by the DLR which in turn forwards it to the GPDMA( See attached image above).This is repeated until the programmed transfer is complete.
5. In case of software handshake, before the transfer can begin the GPDMA and NVIC units must be set up according to the user requirements. Once the peripheral (source or destination) is ready for a transaction it sends a service
request to the CPU. The interrupt service routine then uses the software registers(eg: REQSRCREG), to initiate and control a DMA transaction. The GPDMA finally executes the transaction
Best Regards,
Vasanth
1 Reply
Moderator
Hi,
The GPDMA section in the technical reference manual has more details about
the DMA under GPDMA section.
1. This is dependent on the source and destination of transfer. Kindly check the image attached
2. You can see the handshake step in both hardware and software handshake mechanisms. Its forwarded through DLR in hardware handshake.
With ISR request and register writes it is handled in software handshake.
3.Generally, the GPDMA tries to transfer the data using burst transactions and, where possible, fill or empty the channel FIFO in single bursts - provided that the software has not limited the burst length.
4. Before the transfer can begin the GPDMA and DLR units must be set up according to the user requirements. Once the peripheral (source or destination) is ready for a transaction it sends a service
request. This request is taken by the DLR which in turn forwards it to the GPDMA( See attached image above).This is repeated until the programmed transfer is complete.
5. In case of software handshake, before the transfer can begin the GPDMA and NVIC units must be set up according to the user requirements. Once the peripheral (source or destination) is ready for a transaction it sends a service
request to the CPU. The interrupt service routine then uses the software registers(eg: REQSRCREG), to initiate and control a DMA transaction. The GPDMA finally executes the transaction
Best Regards,
Vasanth
The GPDMA section in the technical reference manual has more details about
the DMA under GPDMA section.
1. This is dependent on the source and destination of transfer. Kindly check the image attached
2. You can see the handshake step in both hardware and software handshake mechanisms. Its forwarded through DLR in hardware handshake.
With ISR request and register writes it is handled in software handshake.
3.Generally, the GPDMA tries to transfer the data using burst transactions and, where possible, fill or empty the channel FIFO in single bursts - provided that the software has not limited the burst length.
4. Before the transfer can begin the GPDMA and DLR units must be set up according to the user requirements. Once the peripheral (source or destination) is ready for a transaction it sends a service
request. This request is taken by the DLR which in turn forwards it to the GPDMA( See attached image above).This is repeated until the programmed transfer is complete.
5. In case of software handshake, before the transfer can begin the GPDMA and NVIC units must be set up according to the user requirements. Once the peripheral (source or destination) is ready for a transaction it sends a service
request to the CPU. The interrupt service routine then uses the software registers(eg: REQSRCREG), to initiate and control a DMA transaction. The GPDMA finally executes the transaction
Best Regards,
Vasanth
