TI达芬奇平台Linux开发环境搭建指南
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更新于2024-08-02
| 158 浏览量 | 举报 "TI DaVinci平台开发环境的建立涵盖了从下载发布到运行PSP组件、构建U-Boot和Linux内核等多个步骤。该过程旨在为DaVinci处理器搭建Linux开发环境，支持从不同类型的存储介质如SPI Flash、NAND Flash、NOR Flash启动U-Boot，以及进一步启动Linux内核。同时，文档还详细介绍了如何配置和使用Linux内核驱动，以支持各种硬件接口，如USB、音频、图形和字符LCD、NAND和NOR闪存、SPI、MMC/SD、RTC、SATA、McBSP、电源管理以及以太网等。"
TI DaVinci平台的Linux开发环境建立是一个复杂的过程，首先需要下载发布的PSP（Platform Support Package）。这通常包括了针对特定硬件平台的软件包，如U-Boot引导加载程序、Linux内核源码以及文件系统。开发者需要确保其主机平台满足必要的硬件和软件要求，比如兼容的操作系统版本和工具链。
在安装过程中，开发人员需要按照指导进行，包括从官方网站获取最新的发布包，安装到符合要求的主机上。接下来，将重点关注不同的启动方式，如通过SPI Flash、NAND Flash或NOR Flash来启动U-Boot。这些存储设备的使用涉及到图像的烧录和系统的启动流程。
一旦U-Boot成功启动，可以进一步引导Linux内核。文档中详细列出了从SDRAM、SPI Flash、NAND Flash和NOR Flash启动Linux内核的步骤，这对于理解DaVinci平台的启动流程至关重要。
在构建PSP组件时，开发者需要编译U-Boot和新的Linux内核。这涉及到配置内核选项以适应特定的应用需求，例如选择启用或禁用某些硬件驱动。此外，文档还提到了如何配置和使用一系列的Linux内核驱动，涵盖广泛的硬件功能，如USB（包括USB 2.0和1.1）、音频处理、图形和字符LCD显示、NAND和NOR闪存接口、SPI通信、MMC/SD卡支持、实时时钟（RTC）、SATA连接、McBSP（多通道缓冲串行端口）以及电源管理和以太网（特别是使用RMIIPHY在UI板上的实现）。
最后，构建完成后，开发者还需要学会如何加载Linux内核模块，以利用这些驱动程序的功能。整个流程详尽且全面，旨在帮助开发者在TI DaVinci平台上快速建立并调试Linux系统，从而进行更深入的开发工作。
Getting Started Quickly
To help you get started quickly, pre-built binaries for the UBL, U-Boot, Linux kernel, and flash writers are provided in the images directory under PSP
installation.
The following list is an overview of the steps you should follow to set up and begin using the OMAP-L138 Evaluation Module (EVM) with the Linux
Platform Support Product (PSP) package.
Understand how to use the OMAP-L138 EVM hardware by reading the EVM technical reference that accompanies the EVM shipment.•
Set up the EVM to boot from the SPI flash on the OMAP-L138 EVM. (Switch S7 set to all off)•
Install the serial terminal software described in Host Platform Requirements and connect the serial cable provided with the EVM shipment to the
COM port of the host system.
•
Set up the serial console software on the PC to connect to that serial port with the following characteristics:
Baud: 115200♦
Data Bits: 8♦
Parity: None♦
Stop Bits: 1♦
Flow Control: None♦
•
Power on the board using the power supply that accompanies the board.•
If your EVM is pre-flashed with U-Boot and Linux kernel, when you power on the EVM, you should see U-Boot and Linux boot sequence
messages on the serial console.
•
Note: If you do not see U-Boot and Linux boot sequence messages, the EVM is not pre-flashed with boot software. You need to flash the EVM with boot
software. The pre-built binaries required for booting the EVM are provided in images directory under PSP installation directory. Skip to "Running PSP
Components" to learn how to use them.
At the Linux prompt, you can use existing Linux commands to test various features and use examples from the examples folder under images
directory of the PSP installation.
•
While U-Boot is booting, you can press any key to interrupt the automatic boot of the Linux kernel. This will leave you in U-Boot, where you can
type commands in the U-Boot command shell. On this page, commands to be typed in the U-Boot shell are indicated by the U-Boot> prompt.
•
In order to create your own applications running on Linux on the OMAP-L138 EVM or to rebuild U-Boot or the Linux kernel provided with the
PSP package, you will need to install the CodeSourcery tools for cross compilation.
•
If you need to re-build any of the software provided with the PSP installation, skip to "Building PSP Components". Note that building some PSP
components requires that you have CCStudio v3.3 running on a Microsoft Windows host. Building other components requires that you have the
CodeSourcery tools running on a Linux host.
•
Running PSP Components
Pre-built binaries for UBL, U-Boot, Linux kernel, and flash writers are provided in the images directory of the PSP installation.
On the OMAP-L138 SoC, the ARM boots first. On boot-up, the ARM runs the ARM UBL in AIS file format. The purpose of the ARM UBL is to initialize
the PLLs, mDDR, and other hardware. Once done, it copies the U-Boot into mDDR and starts it.
U-Boot is an open source boot loader and is responsible for booting the Linux kernel.
Booting U-Boot
SPI Flash
Flashing Images
Follow these steps to boot from SPI Flash:
Obtain the latest ARM GEL file from LogicPD. Run the CCStudio Setup tool and ensure that the ARM GEL file is correctly specified.•
Start CCStudio and connect to the ARM.•
Load the SPI flasher tool on to the ARM. You can either use the pre-built binary shipped in the images/utils directory of the PSP
installation (spiflash-writer-ccsv3.out), or you can build your own by following the steps in section on Building SPI Flash writer.
•
Run the SPI flasher program. You will be prompted for the input file type and the file path. For booting from SPI, an ARM AIS image and
U-Boot are required.
To burn the ARM AIS image, type armais as the image type. When prompted for a file name, provide the path to
arm-spi-ais.bin file. A pre-built image is located in the images/boot-strap/ directory of the PSP installation.
♦
To burn U-Boot, type uboot as the image type. When prompted for a file name, provide the path to the u-boot.bin file. A
pre-built image is located in the images/u-boot/ directory of the PSP installation.
♦
•
Once the SPI flash has been written with the all the required files, disconnect CCStudio and power off the EVM.•
OMAP-L1x8_Linux_User_Guide
Running PSP Components 4
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