Beaglebone Black questions

Hello sheetal,

I think you have more problems than that :<
It seems you have run into the wrong forum. Although also an ARM, the BBB has a Sitara processor which is an ARM-Ax (the x is a numbe, don't remember which). Here the best processor is just a 120Mhz ARM-M4 vs the 500Mhz and above category of the Sitara processors.

Try your luck here:

Hi,

sheetal verma1 said:

1. How to generate different clock frequency from BBB.

- If you want to switch the operating frequency of the ARM on the fly (while BBB is running) you should use the commands provided here: 
   http://processors.wiki.ti.com/index.php/AM335x_Linux_Power_Management_User_Guide#Usage 

- If you wand to generate various clock speeds for a certain IP within Sitara SoC you should modify the corresponding clkdiv register in the PRCM, for details see AM335x TRM. You can modify the registers from userspace, using devmem2 or a custom user-space driver. 

sheetal verma1 said:

2. How to use CAN protocol in beaglebone black.

See bellow articles:
  http://processors.wiki.ti.com/index.php/Sitara_AM35x_CAN_(HECC)_Linux_Driver

  http://processors.wiki.ti.com/index.php/AM335X_DCAN_Driver_Guide 

sheetal verma1 said:

3. Can we call driver function in gui application ? If yes? how

If the driver is registered properly under /dev, or /sys/class you can. Examples for these are fb0, i2c-dev, gpio, etc. 

Best Regards, 

Yordan

Dear Sir,

We want to generate clock frequency and use that clock in DAC ?
How to generate ?

Regards