Setvalidating


If you choose not to interrupt, U-Boot executes an environment variable called U-Boot SPL 2013.04-rc1-14237-g90639fe-dirty (Apr 13 2013 - ) musb-hdrc: Config Data=0xde (UTMI-8, dyn FIFOs, HB-ISO Rx, ↪ HB-ISO Tx, Soft Conn) musb-hdrc: MHDRC RTL version 2.0 musb-hdrc: setup fifo_mode 4 musb-hdrc: 28/31 max ep, 16384/16384 memory USB Peripheral mode controller at 47401000 using PIO, IRQ 0 musb-hdrc: Config Data=0xde (UTMI-8, dyn FIFOs, HB-ISO Rx, ↪ HB-ISO Tx, Soft Conn) musb-hdrc: MHDRC RTL version 2.0 musb-hdrc: setup fifo_mode 4 musb-hdrc: 28/31 max ep, 16384/16384 memory USB Host mode controller at 47401800 using PIO, IRQ 0 OMAP SD/MMC: 0 mmc_send_cmd : timeout: No status update reading reading U-Boot 2013.04-rc1-14237-g90639fe-dirty (Apr 13 2013 - ) I2C: ready DRAM: 512 Mi B WARNING: Caches not enabled NAND: No NAND device found!!! Image Name: Angstrom/3.8.6/beaglebone Image Type: ARM Linux Kernel Image (uncompressed) Data Size: 4215200 Bytes = 4 Mi B Load Address: 80008000 Entry Point: 80008000 Verifying Checksum ... [ 9.638448] net eth0: phy 4a101000.mdio:01 not found on slave 1 .---O---. |-----''----''--' '-----'-'-'-' -' | '---' The Angstrom Distribution beaglebone tty O0 Angstrom v2012.12 - Kernel 3.8.6 beaglebone login: are lines 19–28.0 Mi B MMC: OMAP SD/MMC: 0, OMAP SD/MMC: 1 *** Warning - readenv() failed, using default environment musb-hdrc: Config Data=0xde (UTMI-8, dyn FIFOs, HB-ISO Rx, ↪ HB-ISO Tx, Soft Conn) musb-hdrc: MHDRC RTL version 2.0 musb-hdrc: setup fifo_mode 4 musb-hdrc: 28/31 max ep, 16384/16384 memory USB Peripheral mode controller at 47401000 using PIO, IRQ 0 musb-hdrc: Config Data=0xde (UTMI-8, dyn FIFOs, HB-ISO Rx, ↪ HB-ISO Tx, Soft Conn) musb-hdrc: MHDRC RTL version 2.0 musb-hdrc: setup fifo_mode 4 musb-hdrc: 28/31 max ep, 16384/16384 memory USB Host mode controller at 47401800 using PIO, IRQ 0 Net: gpio: pin 53 (gpio 53) value is 1 Card did not respond to voltage select! OK ## Flattened Device Tree blob at 80f80000 Booting using the fdt blob at 0x80f80000 XIP Kernel Image ... [ 0.106033] pinctrl-single 44e10800.pinmux: prop pinctrl-0 ↪index 0 invalid phandle . This part of the script checks for the existence of a file called u

setvalidating-76

I use the Beagle Bone Black as the target platform and Ubuntu as the development platform for my examples in this article.

You may, however, use the methods presented here to work with any board that uses U-Boot or Barebox as its stage-2 bootloader.

After this, the script checks to see if the variable is defined (line 24).

If it is defined, the script in the variable is executed.

The x-loader is responsible for the output shown in Listing 1. gpio: pin 55 (gpio 55) value is 1 4215264 bytes read in 778 ms (5.2 Mi B/s) gpio: pin 56 (gpio 56) value is 1 22780 bytes read in 40 ms (555.7 Ki B/s) Booting from mmc ...