Embedded Peripherals IP User Guide

ID 683130
Date 6/21/2022
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 54. Cache Coherency Translator Intel® FPGA IP

10.3.5.3. UART Device Structure

UART Device Structure 1


typedef enum stopbit { STOPB_1 = 0,STOPB_2 } StopBit;
typedef enum paritybit { ODD_PARITY = 0, EVEN_PARITY, MARK_PARITY, SPACE_PARITY, NO_PARITY } ParityBit;
typedef enum databit { CS_5 = 0, CS_6, CS_7, CS_8, CS_9 = 256} DataBit;
typedef enum baud
{
BR9600 = B9600,
BR19200 = B19200,
BR38400 = B38400,
BR57600 = B57600,
BR115200 = B115200
} Baud;
typedef enum rx_fifo_level_e { RXONECHAR = 0, RXQUARTER, RXHALF, RXFULL } Rx_FifoLvl;
typedef enum tx_fifo_level_e { TXEMPTY = 0, TXTWOCHAR, TXQUARTER, TXHALF } Tx_FifoLvl;
typedef struct uart_config_s
{
StopBit stop_bit;
ParityBit parity_bit;
DataBit data_bit;
Baud baudrate;
alt_u32 fifo_mode;
Rx_FifoLvl rx_fifo_level;
Tx_FifoLvl tx_fifo_level;
alt_u32 hwfc;
} UartConfig;

UART Device Structure 2


typedef struct altera_16550_uart_state_s
{ 
alt_dev dev; 
void* base; /* The base address of the device */ 
alt_u32 clock; 
alt_u32 hwfifomode; 
alt_u32 ctrl; /* Shadow value of the LSR register */ 
volatile alt_u32 rx_start; /* Start of the pending receive data */ 
volatile alt_u32 rx_end; /* End of the pending receive data */ 
volatile alt_u32 tx_start; /* Start of the pending transmit data */ 
volatile alt_u32 tx_end; /* End of the pending transmit data */ 
alt_u32 freq; /* Current clock freq rate */ 
UartConfig config; /* Uart setting */ 
#ifdef ALTERA_16550_UART_USE_IOCTL 
struct termios termios; 
#endif 
alt_u32 flags; /* Configuration flags */ 
ALT_FLAG_GRP (events) /* Event flags used for 
* foreground/background in mult-threaded 
* mode */ 
ALT_SEM (read_lock) /* Semaphore used to control access to the 
* read buffer in multi-threaded mode */ 
ALT_SEM (write_lock) /* Semaphore used to control access to the 
* write buffer in multi-threaded mode */ 
volatile wchar_t rx_buf[ALT_16550_UART_BUF_LEN]; /* The receive buffer */ 
volatile wchar_t tx_buf[ALT_16550_UART_BUF_LEN]; /* The transmit buffer */ 
line_status_reg line_status; /* line register status for the current read byte data of RBR or data at the top of FIFO*/ 
alt_u8 error_ignore; /* received data will be discarded 
for the current read byte data of RBR or data at the top of FIFO if pe, fe and bi errors detected after error_ignore is set to '0' */ 
} altera_16550_uart_state;