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PSoC 6 Peripheral Driver Library
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PSoC 6 Peripheral Driver Library
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DMA descriptor structure type.
It is a user/component-declared structure allocated in RAM. The DMA HW requires a pointer to this structure to work with it.
For advanced users: the descriptor can be allocated even in flash, then the user manually predefines all the structure items with constants. This is because most of the driver's API (especially functions modifying descriptors, including Cy_DMA_Descriptor_Init()) can't work with read-only descriptors.
Data Fields | |
| uint32_t | ctl |
| 0x00000000 Descriptor control | |
| uint32_t | src |
| 0x00000004 Descriptor source | |
| uint32_t | dst |
| 0x00000008 Descriptor destination | |
| uint32_t | xCtl |
| 0x0000000C Descriptor X loop control | |
| uint32_t | yCtl |
| 0x00000010 Descriptor Y loop control | |
| uint32_t | nextPtr |
| 0x00000014 Descriptor next pointer | |