************************************** Freescale i.MX31 PDK development board ************************************** This file documents the Buildroot support for the Freescale i.MX31 PDK in "3 stack" configuration. The i.MX31 Product Development Kit (or PDK) is Freescale development board [1] based on the i.MX31 application processor [2]. For more details on the i.MX31 PDK board, refer to the User's Guide [3]. Build ===== First, configure Buildroot for your i.MX31 PDK board: make freescale_imx31_3stack_defconfig Build all components: make You will find in ./output/images/ the following files: - rootfs.cpio - rootfs.cpio.gz - rootfs.tar - zImage The generated zImage does include the rootfs. Boot the PDK board ================== The i.MX31 PDK contains a RedBoot bootloader in flash, which can be used to boot the newly created Buildroot images from the network. This necessitates to setup a TFTP server first. This setup is explained for example in Freescale i.MX31 PDK 1.5 Linux User's Guide [4]. Here is a sample RedBoot configuration, for proper network boot of Buildroot on the i.MX31 PDK: RedBoot> fconfig -l Run script at boot: true Boot script: .. load -r -b 0x100000 zImage .. exec -c "console=ttymxc0,115200" Boot script timeout (1000ms resolution): 2 Use BOOTP for network configuration: false Gateway IP address: Local IP address: Local IP address mask: 255.255.255.0 Default server IP address: Board specifics: 0 Console baud rate: 115200 Set eth0 network hardware address [MAC]: false GDB connection port: 9000 Force console for special debug messages: false Network debug at boot time: false Adapt those settings to your network configuration by replacing the appropriate network addresses where necessary. You might want to verify that your i.MX31 PDK switches settings are the correct ones for UART, power, boot mode, etc. Here is a reference switches configuration: SW4 1 2 3 4 5 6 7 8 ON off off off off off off ON SW5 SW6 SW7 SW8 SW9 SW10 0 1 0 0 0 0 See the i.MX31 PDK Linux Quick Start Guide [5] for more details on the switches settings. Connect a serial terminal set to 115200n8 and power on the i.MX31 PDK board. Buildroot will present a login prompt on the serial port. Enjoy! References ========== [1] http://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=i.MX31PDK [2] http://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=i.MX31 [3] http://cache.freescale.com/files/32bit/doc/user_guide/pdk15_imx31_Hardware_UG.pdf [4] http://cache.freescale.com/files/32bit/doc/support_info/IMX31_PDK15_LINUXDOCS_BUNDLE.zip, pdk15_imx31__Linux_UG.pdf [5] http://www.freescale.com/files/32bit/doc/quick_ref_guide/PDK14LINUXQUICKSTART.pdf