Embedded Peripherals IP User Guide

ID 683130
Date 10/24/2025
Public
Document Table of Contents
1. Introduction 2. Avalon® -ST Serial Peripheral Interface Core 3. SPI Core 4. SPI Agent/JTAG to Avalon® Host Bridge Cores 5. Intel eSPI Agent Core 6. eSPI to LPC Bridge Core 7. Ethernet MDIO Core 8. Intel FPGA 16550 Compatible UART Core 9. UART Core 10. Lightweight 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. EPCS/EPCQA Serial Flash Controller Core 17. Intel FPGA Serial Flash Controller Core 18. Intel FPGA Serial Flash Controller II Core 19. Intel FPGA Generic QUAD SPI Controller Core 20. Intel FPGA Generic QUAD SPI Controller II Core 21. Interval Timer Core 22. Intel FPGA Avalon FIFO Memory Core 23. On-Chip Memory (RAM and ROM) Intel FPGA IP 24. On-Chip Memory II (RAM or ROM) Intel FPGA IP 25. PIO Core 26. PLL Cores 27. DMA Controller Core 28. Modular Scatter-Gather DMA Core 29. Scatter-Gather DMA Controller Core 30. Video Sync Generator and Pixel Converter Cores 31. Intel FPGA Interrupt Latency Counter Core 32. Performance Counter Unit Core 33. Vectored Interrupt Controller Core 34. System ID Peripheral Core 35. Intel FPGA GMII to RGMII Converter Core 36. HPS GMII to RGMII Adapter IP 37. Intel FPGA MII to RMII Converter Core 38. HPS GMII to TSE 1000BASE-X/SGMII PCS Bridge Core IP 39. Intel FPGA HPS EMAC to Multi-rate PHY GMII Adapter Core 40. Intel FPGA MSI to GIC Generator Core 41. Cache Coherency Translator IP 42. Altera ACE5-Lite Cache Coherency Translator

8.3.5.1. Public APIs

Table 58.  altera_16550_uart_open
Prototype: altera_16550_uart_state* altera_16550_uart_open (const char *name);
Include: <altera_16550_uart.h>
Parameters: name—the 16550 UART device name to open.
Returns: Pointer to 16550 UART or NULL if fail to open
Description Open 16550 UART device.
Table 59.  altera_16550_uart_close
Prototype: int altera_16550_uart_close(altera_16550_uart_state* sp, int flags);
Include: <altera_16550_uart.h>
Parameters: sp—the 16550 UART device name to close.

flags—for indicating blocking/non-blocking access for single/multi threaded.

Returns: None
Description: Closes 16550 UART device.
Table 60.  altera_16550_uart_read
Prototype: int altera_16550_uart_read(altera_16550_uart_state* sp, wchar_t* ptr, int len, int flags);
Include: <altera_16550_uart.h>
Parameters:

sp - The UART device

ptr – destination address

len – maximum length of the data

flags – for indicating blocking/non-blocking access for single/multi threaded

Returns: Number of bytes read
Description: Read data to the UART receiver buffer. UART required to be in a known settings prior executing this function
Table 61.  altera_16550_uart_write
Prototype: int altera_16550_uart_write(altera_16550_uart_state* sp, const wchar_t* ptr, int len, int flags);
Include: <altera_16550_uart.h>
Parameters:

sp - The UART device

ptr – source address

len – maximum length of the data

flags – for indicating blocking/non-blocking access for single/multi threaded

Returns: Number of bytes written
Description: Writes data to the UART transmitter buffer. UART required to be in a known settings prior executing this function
Table 62.  alt_16550_uart_config
Prototype: alt_u32 alt_16550_uart_config(altera_16550_uart_state* sp, UartConfig *setting);
Include: <altera_16550_uart.h>
Parameters:

sp - The UART device

setting – UART configuration structure to configure UART (refer to UART device structure)

Returns: Return 0 for success otherwise fail
Description: Configure UART per user input before initiating read or write