Embedded Peripherals IP User Guide

ID 683130
Date 2/09/2023
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 55. Lightweight UART Core

13.4.1.3. Driver Examples

The figure below demonstrates writing to a Mailbox. For this example, assume that the hardware system has two processors communicating via Mailboxes. The system includes two Mailbox cores, which provides two-way communication between the processors.

Sender Processor Using Mailbox to Send a Message.


#include <stdio.h>
#include "altera_avalon_mailbox_simple.h"
#include "altera_avalon_mailbox_simple_regs.h"
#include "system.h"

/* example callback function from users*/
void tx_cb (void* report, int status) {  
	if (!status) {    
	   printf (“Transfer done”);  
	} else {    
	   printf (“error in transfer”);  
	}

int main_sender()
{
alt_u32 message[2] = {0x00001111, 0xaa55aa55};
int timeout     = 50000;
alt_u32 status;
alt_avalon_mailbox_simple_dev* mailbox_sender; 

/* Open mailbox on sender processor */
mailbox_sender = alt_avalon_mailbox_open("/dev/mailbox_simple_0", tx_cb, NULL);   

	if (!mailbox_sender){        
		printf ("FAIL: Unable to open mailbox_simple");         
		return 1;    
		} 

	/* Send a message to the other processor using interrupt */
	altera_avalon_mailbox_send (mailbox_sender, message, 0, ISR);

	/* Using polling method to send a message, with infinite timeout */  
		timeout = 0;  
		status = altera_avalon_mailbox_send (mailbox_sender, message, timeout, POLL);

		if (status) {    
			printf (“error in transfer”);  
		} else {    
			printf (“Transfer done”);  
		}

	/* Closing mailbox device and de-registering interrupt handler and callback */  
	altera_avalon_mailbox_close (mailbox_sender);  
	return 0;
	}

Receiver Processor Waiting for Message.


#include <stdio.h>
#include "altera_avalon_mailbox_simple.h"
#include "altera_avalon_mailbox_simple_regs.h"
#include "system.h"

void rx_cb (void* message) {  
	/* Get message read from mailbox */  
	alt_u32* data = alt_u32* message;  
	if (message!= NULL) {    
		printf (“Message received”);  
	} else {    
	  printf (“Incomplete receive”);  
	}

int main_receiver()
{
alt_u32* message[2];
int timeout     = 50000;
alt_avalon_mailbox_simple_dev* mailbox_rcv;

	/* This example is running on receiver processor */  
	mailbox_rcv = alt_avalon_mailbox_open("/dev/mailbox_simple_1", NULL, rx_cb);  
	if (!mailbox_rcv){    
		printf ("FAIL: Unable to open mailbox_simple");    
		return 1;  
	} 

	/* For interrupt disable system */  
	altera_avalon_mailbox_retrieve_poll (mailbox_rcv,message, timeout)  
	
	if (message == NULL)
	printf (“Receive Error”); 
	else 
	printf (“Message received with Command 0x%x and Message 0x%x\n”, message[0], message[1]);  
	

altera_avalon_mailbox_close (mailbox_rcv);
return 0;
}