Hex Value Madness

sling100

Guys

I've got myself stuck with a hex string return from a piece of broadcast kit.
It sends back the elapsed time in HEX, but the values it sends actually represent DECIMAL values

For example.....

Line 330 (12:32:58):: String From [5001:7:1]-[$74$00$49$46$01$00$04]

The actual time is 00h(char 6),01m(char 5),46s(char 4). Note the 46 - not 70 (ie decimal $46)

The only way I can think of presenting each char as 2 digit ascii text for my panels is ...

FORMAT('%02d',ATOI(ITOHEX(cData[4]))) - which seems a bit convoluted to say the least!

I'm sure I'm missing something here, but I haven't seen any daylight for 48 hours and I think it's affecting me a bit!

Thanks

Simon

jweather

Looks right to me... assuming it works, what's the problem? Just make sure you comment it with the expected input format so the next guy (possibly yourself 6 months later) doesn't say "that can't possibly work, I'll fix it"

Andrew G Welker

sling100 wrote: »

Guys

I've got myself stuck with a hex string return from a piece of broadcast kit.
It sends back the elapsed time in HEX, but the values it sends actually represent DECIMAL values

For example.....

Line 330 (12:32:58):: String From [5001:7:1]-[$74$00$49$46$01$00$04]

The actual time is 00h(char 6),01m(char 5),46s(char 4). Note the 46 - not 70 (ie decimal $46)

The only way I can think of presenting each char as 2 digit ascii text for my panels is ...

FORMAT('%02d',ATOI(ITOHEX(cData[4]))) - which seems a bit convoluted to say the least!

I'm sure I'm missing something here, but I haven't seen any daylight for 48 hours and I think it's affecting me a bit!

Thanks

Simon

This looks to be Binary Coded Decimal, which is actually pretty easy to deal with. See this thread for more information. Basically, you can take the character $46, which has the equivalent integer value of 70 (16 * 4 + 6) and do a modulo operation with 16 to get the ones place, then you can divide the same number by 16 and multiply by 10 to get the ones place.

Define_function integer fnDecodeBCD(char bcd){
     return (bcd/16 * 10) + (bcd % 16)
}

define_function char fnEncodeBCD(int bcd){
     return (bcd/10 * 16) + (bcd % 10)

Hope that helps.

dchristo

sling100 wrote: »

Guys

I've got myself stuck with a hex string return from a piece of broadcast kit.
It sends back the elapsed time in HEX, but the values it sends actually represent DECIMAL values

For example.....

Line 330 (12:32:58):: String From [5001:7:1]-[$74$00$49$46$01$00$04]

The actual time is 00h(char 6),01m(char 5),46s(char 4). Note the 46 - not 70 (ie decimal $46)

The only way I can think of presenting each char as 2 digit ascii text for my panels is ...

FORMAT('%02d',ATOI(ITOHEX(cData[4]))) - which seems a bit convoluted to say the least!

I'm sure I'm missing something here, but I haven't seen any daylight for 48 hours and I think it's affecting me a bit!

Thanks

Simon

How about this?

FORMAT('%02X', cData[4])

--D

sling100

Thanks chaps.

My method does work, it just looks a mess - Andrew's BCD function would make it look a lot cleaner for sure.

Dchristo - not sure that would work? Won't that return a hex value? Or maybe that's what I want .... Hmm.

I'm off to have another try!

S