Archive for May, 2011
Linux kernel 3.0
May 31, 2011ARM board with SATA (slave) connection
May 31, 2011Reverse Engineering Firmware
May 31, 2011BeagleBoard-XM + DSP boot
May 24, 2011mmc init
fatload mmc ${mmcdev} ${loadaddr} uImage-2.6.37
setenv bootargs root=/dev/mmcblk0p2 rw rootfstype=ext3 rootwait mem=200M
bootm ${loadaddr}
After booting, load the drivers:
insmod dsplinkk.ko
insmod lpm_omap3530.ko
insmod cmemk.ko phys_start=0x8C900000 phys_end=0x8D900000
pools=20×4096,10×131072,2×1048576,1×5250000,4×829440,2×691200
root@beagleboard:/lib/modules/2.6.37/kernel/drivers/dsp# lsmod Module Size Used by
cmemk 20171 0
lpm_omap3530 6125 0
dsplinkk 122177 1 lpm_omap3530
[ 68.373840] DSPLINK Module (1.65.00.03) created on Date: Mar 9 2011 Time: 14:36:55
[ 79.071655] CMEMK module: built on Jan 27 2011 at 01:19:18 [ 79.075683] Reference Linux version 2.6.37
[ 79.079162] File
/OE/angstrom-setup-scripts/build/tmp-angstrom_2008_1/work/beagleboard-angstrom-linux-gnueabi/ti-linuxutils-1_2_26_01_02-r100d/linuxutils_2_26_01_02/packages/ti/sdo/linuxutils/cmem/src/module/cmemk.c [ 79.096405] allocated heap buffer 0xce000000 of size 0x32c000 [ 79.100799] cmemk initialized
# cat /proc/cmdline
root=/dev/mmcblk0p2 rw rootfstype=ext3 rootwait mem=200M
Booting a different kernel in BeagleBoard-XM
May 24, 20111. Simply copy the kernel image to the SD-Card
2. Enter uboot menu and type the commands:
OMAP3 beagleboard.org # mmc init
OMAP3 beagleboard.org # fatload mmc ${mmcdev} ${loadaddr} uImage-2.6.37 OMAP3 beagleboard.org # bootm ${loadaddr}
Blinking BeagleBoard-XM LED (C version)
May 20, 2011#include
void main() {
FILE *fp;
//Configures LED to be manually controlled
fp = fopen(“/sys/class/leds/beagleboard\:\:usr0/trigger”, “w”); fprintf(fp, “none”);
fclose(fp);
while (1) {
fp = fopen(“/sys/class/leds/beagleboard\:\:usr0/brightness”, “w”); fprintf(fp, “1″);
fclose(fp);
sleep(1);
fp = fopen(“/sys/class/leds/beagleboard\:\:usr0/brightness”, “w”); fprintf(fp, “0″);
fclose(fp);
sleep(1);
}
}
Blinking BeagleBoard-XM LED (Shell Script)
May 20, 2011OLD=`cat /sys/class/leds/beagleboard\:\:usr0/trigger`
echo “Valor atual: $OLD”
echo “none” > /sys/class/leds/beagleboard\:\:usr0/trigger
while :;
do
echo 0 > /sys/class/leds/beagleboard\:\:usr0/brightness
sleep 1
echo 1 > /sys/class/leds/beagleboard\:\:usr0/brightness
sleep 1
done
Robots coming to your home
May 17, 2011For “only” 3000 dollars, you might have one of these in a near future:
