Embedded Peripherals IP User Guide

ID 683130
Date 8/11/2025
Public
Document Table of Contents
1. Introduction 2. Avalon® -ST Single-Clock and Dual-Clock FIFO Cores 3. Avalon® -ST Serial Peripheral Interface Core 4. SPI Core 5. SPI Agent/JTAG to Avalon® Host Bridge Cores 6. Intel eSPI Agent Core 7. eSPI to LPC Bridge Core 8. Ethernet MDIO Core 9. Intel FPGA 16550 Compatible UART Core 10. UART Core 11. JTAG UART Core 12. Intel FPGA Avalon® Mailbox Core 13. Intel FPGA Avalon® Mutex Core 14. Intel FPGA Avalon® I2C (Host) Core 15. Intel FPGA I2C Agent to Avalon® -MM Host Bridge Core 16. Intel FPGA Avalon® Compact Flash Core 17. EPCS/EPCQA Serial Flash Controller Core 18. Intel FPGA Serial Flash Controller Core 19. Intel FPGA Serial Flash Controller II Core 20. Intel FPGA Generic QUAD SPI Controller Core 21. Intel FPGA Generic QUAD SPI Controller II Core 22. Interval Timer Core 23. Intel FPGA Avalon FIFO Memory Core 24. On-Chip Memory (RAM and ROM) Intel FPGA IP 25. On-Chip Memory II (RAM or ROM) Intel FPGA IP 26. Optrex 16207 LCD Controller Core 27. PIO Core 28. PLL Cores 29. DMA Controller Core 30. Modular Scatter-Gather DMA Core 31. Scatter-Gather DMA Controller Core 32. SDRAM Controller Core 33. Tri-State SDRAM Core 34. Video Sync Generator and Pixel Converter Cores 35. Intel FPGA Interrupt Latency Counter Core 36. Performance Counter Unit Core 37. Vectored Interrupt Controller Core 38. Avalon® -ST Data Pattern Generator and Checker Cores 39. Avalon® -ST Test Pattern Generator and Checker Cores 40. System ID Peripheral Core 41. Avalon® Packets to Transactions Converter Core 42. Avalon® -ST Multiplexer and Demultiplexer Cores 43. Avalon® -ST Bytes to Packets and Packets to Bytes Converter IP 44. Avalon® -ST Delay Core 45. Avalon® -ST Round Robin Scheduler Core 46. Avalon® -ST Splitter Core 47. Avalon® -MM DDR Memory Half Rate Bridge Core 48. Intel FPGA GMII to RGMII Converter Core 49. HPS GMII to RGMII Adapter Intel® FPGA IP 50. Intel FPGA MII to RMII Converter Core 51. HPS GMII to TSE 1000BASE-X/SGMII PCS Bridge Core Intel® FPGA IP 52. Intel FPGA HPS EMAC to Multi-rate PHY GMII Adapter Core 53. Intel FPGA MSI to GIC Generator Core 54. Cache Coherency Translator Intel® FPGA IP 55. Altera ACE5-Lite Cache Coherency Translator 56. Lightweight UART Core

30.8.14. alt_msgdma_construct_extended_descriptor

Table 341.  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.