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arunb
Joined: 08 Sep 2003
Posts: 492
Location: India
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| converting hex into char |
 Posted: Sun Feb 15, 2004 9:05 pm |
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Hi,
In my project I am sending data to a serial eeprom using i2c.
I would like to read the eeprom and send the read data to an video OSD interface card (BOB3) in the form of strings.
for example: the video OSD card accepts strings like
ABCD | etc.
Is the data being read from the eeprom be the ascii code, or is it in hex..???
cheers
arun |
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Al
Joined: 13 Nov 2003
Posts: 28
Location: Belfast
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| Re: converting hex into char |
| Posted: Mon Feb 16, 2004 3:30 am |
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| arunb wrote: |
Is the data being read from the eeprom be the ascii code, or is it in hex..???
arun |
It shouldn't really matter what form it is stored in the eeprom. Any format whether hex, char or decimal is only a series of bits. So if the letter 'A' was stored in the eeprom as hex it would be 0x41. However if you read this into a char it becomes 'A'. Play about with the following code to see what I mean.
char letter;
letter = 'A';//I had forgot about this line 
printf("Letter: %c, Hex: %x, Decimal %d", letter, letter, letter);
It would not matter if the original declaration was:
int8 letter
The result should be the same.
_________________
Alan Murray
Last edited by Al on Tue Feb 17, 2004 2:54 am; edited 1 time in total |
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Guest
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| Posted: Mon Feb 16, 2004 10:04 pm |
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The code below will convert Hex number to ASCII character
| Code: |
for (Loop = 0; Loop < 8; Loop++)
{
Temp = (Array1[Loop] & 0xF0) >> 4;
if (Temp < 10)
Array2[Loop * 2] = Temp + 48;
else
Array2[Loop * 2] = Temp + 55;
Temp = (Array1[Loop] & 0x0F)
if (Temp < 10)
Array2[(Loop * 2) + 1] = Temp + 48;
else
Array2[(Loop * 2) + 1] = Temp + 55;
}
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hope this helps. |
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