When you add it all up - all the big companies, governments, healthcare institutions, big-budget CGI movies (Avatar) and the like - 800 million terabytes does not seem outstanding for the entire world's storage.ĭon't plan on seeing petabyte hard drives any time soon, let alone zettabytes some of the largest storage arrays are only holding about half of a petabyte.
Even the storage experts among us are only considering data storage in the dozens to hundreds of terabytes. This number is just massive, especially considering most humans have never even seen a terabyte of data. For example, the "tweeting" example requires the knowledge of how many humans there are in the world (which sources can't seem to agree on) and some fairly fuzzy math, since the unit of time is 100 years.īeyond the analogies, the EMC article outlines the fact that humans created 800 billion gigabytes (800 million terabytes, 800,000 petabytes, 800 exabytes, or 0.8 zettabytes) in 2009 and, based on the growth of 62% over 2008's data, posits that humans will create about 1.2 zettabytes in 2010.
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"A full-length episode of FOX TV's hit series 24 running continuously for 125 million years."Īs McNamara points out, these analogies are oftentimes outside the scope of what the normal human - even the normal IT person - can fully grasp."75 billion fully-loaded 16 GB Apple iPads, which would fill the entire area of Wembley Stadium to the brim 41 times, the Mont Blanc Tunnel 84 times, CERN's Large Hadron Collider tunnel 151 times, Beijing National Stadium 15.5 times or the Taipei 101 Tower 23 times."."The digital information created by every man, woman and child on Earth 'Tweeting' continuously for 100 years.".Here are three analogies from the EMC article: In a relatively humorous and sarcastic post, blogger Paul McNamara looks at a recent news release from EMC and attempts to understand, and help us understand, just how big a zettabyte is. "Just how big is a zettabyte? That's the question one blogger is attempting to understand after reading a report that states humans will create about 1.2 zettabytes in 2010. This is truly an enormous amount of data! To get an idea how big just 1 zettabyte is, consider this: So, given that each diploid cell contains 1.5 GB of data (this is very approximate, as I am only accounting for the diploid cells and ignoring the haploid sperm and egg cells in our body), the approximate amount of data stored in the human body is:ġ.5 Gbytes x 100 trillion cells = 150 trillion Gbytes or 150×10^12 x 10^9 bytes = 150 Zettabytes (10^21)!!!" Let us take 100 trillion cells as the generally accepted estimate. Estimates for the number of cells in the human body range between 10 trillion and 100 trillion. my max packet size is 200 bytes."For example, how many megabytes of genetic data are stored in the human body? For simplicity’s sake, let’s ignore the microbiome (all non-human cells that live in our body), and focus only on the cells that make up our body. but the incoming data from the computer to the processor will occasionally exceed 64 bytes. the outgoing data from the processor to the computer can easily be separated into 64 byte chunks.
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Void CDCTxService(void) does anyone know where the source code for these functions can be found? is there a max limit that usb can send? do i need to separate my data into 64 byte chunks? do i need pauses between those chunks.
Void putUSBUSART(char *data, BYTE Length) Void putrsUSBUSART(const ROM char *data) this is a list of prototypes in file usb_function_cdc.h void USBCheckCDCRequest(void) īYTE getsUSBUSART(char *buffer, BYTE len) if i follow the getUSBUSART() function i reach a prototype that leads to no where. increasing this number also had no effect. then i found numBytesRead = getsUSBUSART(USB_Out_Buffer,64) this line pulls the number of characters available from the usb. char USB_In_Buffer Ĭhar USB_Out_Buffer increasing the size of them did not change anything. working through the code i found two buffers.
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what i don't understand is if i use the serial console to send the board over 64 characters using "assemble packet" the board only replies with 64 characters. when a character is sent to the board the board echos that character +1. i imported the mplab8 project into mplabx. i tweaked the configuration bits and commented out everything related to port A.
i'm using the project USB Device - CDC - Basic Demo - PIC32 ESK wo MAL. as a base for my project i'm using a demo provided with the pic32 usb starter kit II. all 6 uarts are used for the project that's why i'm trying to use the usb. i want to use usb to serial debug a project. i'm just at the edge of understanding what is going on.
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