Articles/9/3.jpg' alt='Serial Ee Prom Programming Software' title='Serial Ee Prom Programming Software' />Ken Shirriffs blog. The Pocket. Beagle is a tiny but powerful. Faster Than Light 2012 Pcb. Linux computer. It has 4. IO pins, 8 analog inputs, and supports multiple serial IO protocols, making it very useful as a controller. In addition, its processor includes two 2. MHz microcontrollers that. Linux system. This article discusses my experience trying out different features of the Pocket. Beagle, along with some technical details. The Pocket. Beagle is a compact Linux computer, somewhat bigger than a quarter. You may be familiar with the Beagle. Bone, a credit card sized computer. The Pocket. Beagle is very similar to the Beagle. Upload_PSC/ScreenShots/PIC20098241821474041.JPG' alt='Serial Ee Prom Programming Software' title='Serial Ee Prom Programming Software' />Bone, but smaller and cheaper. Both systems use TIs 1. GHz Sitara ARM Cortex A8 processor, but. Pocket. Beagles IO is stripped down with 7. Beagle. Bone. The Pocket. Beagle doesnt have the Beagle. Bones 4. GB on board flash all storage is on a micro SD card. Quickar Electronics, Inc. ICs. I have 2 Kronos 420Gs setup as gates at my office. Somewhere along the line the computer with the gatekeeper central software was removed and never replaced. I forgot to mention we were using serial comm with the old clock and are now switching to ethernet. The Beagle. Bones Ethernet and HDMI ports are also dropped. The Pocket. Beagle uses an interesting technology to achieve its compact sizeit is built around. System In Package SIP device that has multiple dies and components in one package see diagram below. The Octavo Systems OSD3. SM. TI 3. 35. 8 Sitara processor, 5. REVELPROG-IS_v1-3_soft_en.jpg' alt='Serial Ee Prom Programming Software' title='Serial Ee Prom Programming Software' />MB of RAM, power management and EEPROM. In the photo above, this package has a white label and dominates the circuit board. The Pocket. Beagle is powered by the OSD3. Initializing the SD card. To use the Pocket. Beagle, you must write a Linux file system to a micro SD card. The easiest way to do this is to download an image, write it to the SD card from your computer, and then. SD card into the Pocket. Beagle. Details are in the footnotes. You can also compile a kernel from scratch, set up U boot, and build a file system on the SD card. JPG' alt='Serial Ee Prom Programming Software' title='Serial Ee Prom Programming Software' />Pocket. Beagle. Theres a bunch of information on this process at Digikeys. Pocket. Beagle getting started page. This is the way to go if you want flexibility, but its overkill if you just want to try out the Pocket. Beagle. Starting up the Pocket. Beagle. Unlike the Beagle. Bone, which supports a keyboard and an HDMI output, the Pocket. Beagle is designed as a headless device that you ssh into. You can plug the Pocket. Beagle into your computers USB port, and. Pocket. Beagle should appear as a network device 1. MacLinux and 1. 92. Windows details. You should also see a flash drive style file system appear on your computer under the name BEAGLEBONE. If the Pocket. Beagle has the default Debian OS3, you can log in with. Password temppwd. Connecting to the Pocket. Beagles serial console. While ssh is the simplest way to connect to the Pocket. Beagle, if anything goes wrong with the boot or networking, youll need to look at the serial console to debug the problem. The easiest solution is a UART Click board. USB. You can then connect with screen or other terminal software screen devcu. Plugging a UART click board into the Pocket. Beagle gives access to the serial console. You can also use a FTDI serial adapter such as the Adafruit FTDI Friend. If youve worked with the Beagle. Bone, you may have one of these already. Youll need three wires to hook it up to the Pocket. Beagle it wont plug in directly as with the Beagle. Bone. Just connect ground, Rx and Tx between the Pocket. Beagle and the adapter making sure to cross Rx to Tx. Accessing the Pocket. Beagles serial console through an FTDI interface. Pinout. The Pocket. Beagle has two headers that provide access to IO functions. These headers are different from the Beagle. Bones headers, so Beagle. Bone capes wont work with the Pocket. Beagle. The Pocket. Free Software With Crack Download'>Free Software With Crack Download. Beagle pinout diagram below shows what the header pins do. The diagram may seem confusing at first, since each pin has up to three different functions shown. Most pins actually support 8 functions, so more obscure functions have been omitted. The diagram is color coded. Power and system pins are labeled in red. GPIO general purpose IO pins are white. USB pins are blue. Analog inputs are yellow. UART serial pins are brown. PRU microcontroller pins are cyan. Battery pins are magenta. I2. C bus is purple. PWM pulse width modulation outputs are light green. SPI Serial Peripheral Interface is brown. CAN Controller Area Network is dark green. QEP quadrature encoder pulse inputs are gray. The dotted lines in the diagram indicate the default pin functions except for the PRU pins, which default to GPIO. Pinout diagram of the Pocket. Beagles headers. USBblue, Poweryellow, GPIOwhite, PRUcyan, SPIorange, UARTbrown, and other colors are miscellaneous. Note that the diagram shows the headers from the component side of the board, not the silkscreened side of the board. Comparing the pin diagram with the board below, you will notice everything is flipped horizontally. E. g. GPIO 5. 9 is on the right in the diagram and on the left below. So make sure youre using the right headerSilkscreen labeling the Pocket. Beagles header pins. One tricky feature of the Sitara processor is that each pin has up to eight different functions. The motivation is that the chip supports a huge number of different IO functions, so there arent enough physical pins for every desired IO. The solution is a pin mapping system that lets the user choose which functions are available on each pin. If you need to change a pin assignment from the default. Some examples will be given below. Pins can also be configured at boot time using a U Boot overlay. GPIOThe Pocket. Beagle exposes 4. GPIO general purpose IO pins on the headers. The pins can be easily controlled by writing to pseudo files. For example, the following shell code repeatedly blinks an LED connected to GPIO 1. P13. 3. echo out sysclassgpiogpio. An LED connected to header P1 pin 3. GPIO 1. 11. PRUOne of the most interesting features of the Pocket. Beagle is its PRUs, two 3. RISC microcontrollers that are built into the Sitara processor chip. These microcontrollers let you perform time critical operations such as bit banging a protocol, without worrying about context switches, interrupts, or anything else interfering with your code. At the same time, the ARM processor gives high performance and a complete Linux environment. Ive made use of the Beagle. Bones PRU to interface to a vintage Xerox Altos 3 Mbs Ethernet. Although the PRUs are not as easy to use as an Arduino, they can be programmed in C, using the command line or Texas Instruments CCS development environment. Ive written about PRU programming in C before link and the underlying library framework link for the 3. PRUs are accessed. The PRUs are now controlled through the remoteproc framework. In addition, a messaging library RPMsg makes it simpler to communicate between the PRUs and the ARM processor. A resourcetable. The following code will turn the LED on by setting a bit in control register 3. LED off, and wait again. Note that the PRU output is controlled by modifying a bit in register R3. This will blink the LED at 4. Mhz, unaffected by any other tasks, context switches or interrupts. For the full code and details of how to run it, see my github repository. R3. 0 R3. 0 1lt lt 1 Turn on output 1. R3. 0 R3. 0 1lt lt 1 Turn off output 1. This code uses PRU0 output 1, which is accessed through header pin P13. GPIO example. Since this pin defaults to the GPIO, it must be switched to a PRU output 1. P13. 3 pruout. This LED example illustrates two key advantages of using the PRU versus controlling a GPIO pin from Linux.