Safe double buffering using dma safe linked lists

A method, comprising:

• providing a sequence of transaction control sets which are arranged as a linked list and which collectively describe a data transfer by which data is to be moved, wherein the data transfer is to move the data from a peripheral and alternatingly to a first memory buffer and a second memory buffer, the first and second memory buffers being arranged in parallel with one another at an interface of the peripheral;
• and
• transferring a first portion of the data from the peripheral to the first memory buffer according to a first transaction control set in the sequence, and subsequently transferring a second portion of the data from the peripheral to the second buffer according to a second transaction control set in the sequence;
• determining an actual error detection code based on the first and/or second portions of the data or an address actually processed during execution of the first and/or second transaction control sets;
• and
• selectively flagging an error based on whether the actual error detection code is the same as an expected error detection code contained in a third transaction control set in the sequence.

A method, comprising:

• providing a first sequence of transaction control sets that collectively describe a first data transfer by which first data is to be moved between a first peripheral and first and second memory buffers, the first sequence of transaction control sets arranged as a linked list;
• transferring a first portion of the first data between the first memory buffer and the first peripheral according to a first transaction control set in the first sequence;
• subsequently transferring a second portion of the first data between the second memory buffer and the first peripheral according to a second transaction control set in the first sequence;
• determining an actual error detection code based on the first and/or second portions of the first data or an address actually processed during execution of the first and/or second transaction control sets;
• and
• selectively flagging an error based on whether the actual error detection code is the same as an expected error detection code contained in a third transaction control set in the first sequence.