Embedded Peripherals IP User Guide

ID 683130
Date 12/13/2021
Public

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Document Table of Contents
1. Introduction 2. Avalon® -ST Multi-Channel Shared Memory FIFO Core 3. Avalon® -ST Single-Clock and Dual-Clock FIFO Cores 4. Avalon® -ST Serial Peripheral Interface Core 5. SPI Core 6. SPI Agent/JTAG to Avalon® Host Bridge Cores 7. Intel eSPI Agent Core 8. eSPI to LPC Bridge Core 9. Ethernet MDIO Core 10. Intel FPGA 16550 Compatible UART Core 11. UART Core 12. JTAG UART Core 13. Intel FPGA Avalon® Mailbox Core 14. Intel FPGA Avalon® Mutex Core 15. Intel FPGA Avalon® I2C (Host) Core 16. Intel FPGA I2C Agent to Avalon® -MM Host Bridge Core 17. Intel FPGA Avalon® Compact Flash Core 18. EPCS/EPCQA Serial Flash Controller Core 19. Intel FPGA Serial Flash Controller Core 20. Intel FPGA Serial Flash Controller II Core 21. Intel FPGA Generic QUAD SPI Controller Core 22. Intel FPGA Generic QUAD SPI Controller II Core 23. Interval Timer Core 24. Intel FPGA Avalon FIFO Memory Core 25. On-Chip Memory (RAM and ROM) Intel FPGA IP 26. On-Chip Memory II (RAM or ROM) Intel FPGA IP 27. Optrex 16207 LCD Controller Core 28. PIO Core 29. PLL Cores 30. DMA Controller Core 31. Modular Scatter-Gather DMA Core 32. Scatter-Gather DMA Controller Core 33. SDRAM Controller Core 34. Tri-State SDRAM Core 35. Video Sync Generator and Pixel Converter Cores 36. Intel FPGA Interrupt Latency Counter Core 37. Performance Counter Unit Core 38. Vectored Interrupt Controller Core 39. Avalon® -ST Data Pattern Generator and Checker Cores 40. Avalon® -ST Test Pattern Generator and Checker Cores 41. System ID Peripheral Core 42. Avalon® Packets to Transactions Converter Core 43. Avalon® -ST Multiplexer and Demultiplexer Cores 44. Avalon® -ST Bytes to Packets and Packets to Bytes Converter Cores 45. Avalon® -ST Delay Core 46. Avalon® -ST Round Robin Scheduler Core 47. Avalon® -ST Splitter Core 48. Avalon® -MM DDR Memory Half Rate Bridge Core 49. Intel FPGA GMII to RGMII Converter Core 50. Intel FPGA MII to RMII Converter Core 51. Intel FPGA HPS GMII to TSE 1000BASE-X/SGMII PCS Bridge Core 52. Intel FPGA HPS EMAC to Multi-rate PHY GMII Adapter Core 53. Intel FPGA MSI to GIC Generator Core

31.8.14. alt_msgdma_construct_extended_descriptor

Table 323.  alt_msgdma_construct_extended_descriptor
Prototype:

static int alt_msgdma_construct_descriptor (alt_msgdma_dev *dev, alt_msgdma_extended_descriptor *descriptor, alt_u32 *read_address, alt_u32 *write_address, alt_u32 length, alt_u32 control, alt_u16 sequence_number, alt_u8 read_burst_count, alt_u8 write_burst_count,

alt_u16 read_stride, alt_u16 write_stride)

Include: < modular_sgdma_dispatcher.h >
Parameters:

*dev-a pointer to msgdma instance.

*descriptor – a pointer to an extended descriptor structure.

*read_address – a pointer to the base address of the source memory.

*write_address – a pointer to the base address of the destination memory.

length – is used to specify the number of bytes to transfer per descriptor. The largest possible value can be filled in is “0Xffffffff”.

control – control field.

sequence_number – programmable sequence number to identify which descriptor has been sent to the host block.

read_burst_count – programmable burst count between 1 and 128 and a power of 2. Setting to 0 will cause the host to use the maximum burst count instead.

write_burst_count – programmable burst count between 1 and 128 and a power of 2. Setting to 0 will cause the host to use the maximum burst count instead.

read_stride – programmable transfer stride. The stride value determines by how many words the host will increment the address. For fixed addresses the stride value is 0, sequential it is 1, every other word it is 2, etc…

write_stride – programmable transfer stride. The stride value determines by how many words the host will increment the address. For fixed addresses the stride value is 0, sequential it is 1, every other word it is 2, etc…

Returns:

“0” for success, -EINVAL for invalid argument, could be due to argument which has larger value than hardware setting value.

Description:

Helper functions for constructing mm_to_st, st_to_mm, mm_to_mm extended descriptors. Unnecessary elements are set to 0 for completeness and will be ignored by the hardware.