Generic Serial Flash Interface Intel® FPGA IP User Guide

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ID 683419
Date 11/09/2021
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Document Table of Contents
Document Table of Contents x
1. Generic Serial Flash Interface Intel® FPGA IP User Guide
1. Generic Serial Flash Interface Intel® FPGA IP User Guide x
1.1. Release Information 1.2. Device Family Support 1.3. Signals 1.4. Parameters 1.5. Register Map 1.6. Using Generic Serial Flash Interface Intel® FPGA IP 1.7. Generic Serial Flash Interface Intel® FPGA IP Reference Design 1.8. Flash Access Using the Generic Serial Flash Interface Intel® FPGA IP 1.9. Nios II HAL Driver 1.10. Generic Serial Flash Interface Intel® FPGA IP User Guide Archives 1.11. Document Revision History for the Generic Serial Flash Interface Intel® FPGA IP User Guide
1.6. Using Generic Serial Flash Interface Intel® FPGA IP x
1.6.1. Control Status Register Byte Enable 1.6.2. Memory Operations 1.6.3. Byte Enabling 1.6.4. Constraining the I/O Pins
1.6.3. Byte Enabling x
1.6.3.1. Byte Enabling Supported Patterns
1.7. Generic Serial Flash Interface Intel® FPGA IP Reference Design x
1.7.1. Hardware and Software Requirements 1.7.2. Functional Description 1.7.3. Creating Nios® II Hardware System 1.7.4. Integrating Modules into Intel® Quartus® Prime Project 1.7.5. Programming the .sof File 1.7.6. Building Application Software System using Nios® II Software Build Tools
1.7.2. Functional Description x
1.7.2.1. Reference Design Components 1.7.2.2. Reference Design Application Program
1.7.6. Building Application Software System using Nios® II Software Build Tools x
1.7.6.1. Reference Design Results
1.8. Flash Access Using the Generic Serial Flash Interface Intel® FPGA IP x
1.8.1. Flash Operations that Require Operation Code 1.8.2. Flash Operations to Read Flash Registers 1.8.3. Flash Operations to Write Flash Registers 1.8.4. Flash Operations that Require An Address 1.8.5. Read Memory from the Flash 1.8.6. Program Flash
1.9. Nios II HAL Driver x
1.9.1. Driver API
1. Generic Serial Flash Interface Intel® FPGA IP User Guide

1.9. Nios II HAL Driver

The HAL API is available for this controller in the following software files:
  • intel_generic_serial_flash_interface_top.h
  • intel_generic_serial_flash_interface_top.c

These files implement the Generic Serial Flash Interface core device driver for the HAL system library.

Nios® II HAL supports a number of generic device model classes including one for device flashes. Developing against these generic classes gives a consistent interface for driver functions so that the HAL can access the driver functions uniformly.

A HAL API application begins by calling alt_flash_open_dev() to open the flash device, which returns a file handle to a flash device. You can obtain the IP name from system.h. All offset-related variables are based on absolute addressing to the flash memory.
Note:
  1. Enable altera_safeclib in BSP Software Package from BSP Editor to use the HAL API.
  2. The HAL API does not reset the error bits, thus needs to reset manually depending on the flash device, for example:
    • Clear flag status register for Micron flash.
    • Clear status register for Cypress flash.
  3. Sector protection related operations are not supported in the HAL API.
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