![](templates/subSilver/images/CCSLogo.jpg) |
![CCS C Software and Maintenance Offers](templates/subSilver/images/forumAd6.jpg) |
View previous topic :: View next topic |
Author |
Message |
Jerry Guest
|
Packing Messages on 18F252 |
Posted: Sun Feb 23, 2003 4:57 pm |
|
|
I was trying to implement the following example from a previous post for the 18F252.
I had no problem making it work on the 16F876.
The output shown is all scrambled. Any suggestions on what I have to change.
Thanks in advance.
#DEFINE OK_MSG 0x1FCE
#DEFINE UNK_CMD_MSG 0x1FD0
#DEFINE LEN_ERR_MSG 0x1FD8
#DEFINE NUM_ERR_MSG 0x1FE3
#DEFINE HEX_ERR_MSG 0x1FEA
#DEFINE RNG_ERR_MSG 0x1FEF
#DEFINE UNK_ERR_MSG 0x1FF9
//------------------------------------------------------------------------------
// *** Then pack the messages up in the following fashion ***
//------------------------------------------------------------------------------
#ROM 0x1FCE = {(128*'O'+'K'), 0 } // OK
#ROM 0x1FD0 = {(128*'U'+'n'), (128*'k'+'n'), (128*'o'+'w'), (128*'n'+' '), (128*'C'+'o'),
(128*'m'+'m'), (128*'a'+'n'), (128*'d') } // Unknown Command
#ROM 0x1FD8 = {(128*'W'+'r'), (128*'o'+'n'), (128*'g'+' '), (128*'C'+'o'), (128*'m'+'m'),
(128*'a'+'n'), (128*'d'+' '), (128*'L'+'e'), (128*'n'+'g'),
(128*'t'+'h'), 0 } // Wrong Command Length
#ROM 0x1FE3 = {(128*'N'+'u'), (128*'m'+'e'), (128*'r'+'i'), (128*'c'+' '), (128*'E'+'r'),
(128*'r'+'o'), (128*'r') } // Numeric Error
#ROM 0x1FEA = {(128*'H'+'e'), (128*'x'+' '), (128*'E'+'r'), (128*'r'+'o'),
(128*'r') } // Hex Error
#ROM 0x1FEF = {(128*'N'+'u'), (128*'m'+'b'), (128*'e'+'r'), (128*' '+'o'), (128*'u'+'t'),
(128*' '+'o'), (128*'f'+' '), (128*'R'+'a'), (128*'n'+'g'),
(128*'e') } // Number out of Range
#ROM 0x1FF9 = {(128*'U'+'n'), (128*'k'+'n'), (128*'o'+'w'), (128*'n'+' '), (128*'E'+'r'),
(128*'r'+'o'), (128*'r') } // Unknown Error
//------------------------------------------------------------------------------
// *** This routine unpacks and transmits the messages ***
//------------------------------------------------------------------------------
void put_ee_text(long addr) // transmit packed messages from flash
{ int ch; // unpacked character
long adr, // program memory address
xl; // packed characters
adr = addr; // copy address
while (1) // forever
{ xl = read_program_eeprom(adr++); // get packed data, auto inc address
ch = make8(xl << 1, 1); // unpack first character
if (ch == 0) break; // if null, exit
putc(ch); // transmit first character
ch = xl & 127; // unpack second character
if (ch == 0) break; // if null, exit
putc(ch); // transmit second character
}
}
//------------------------------------------------------------------------------
// *** Typical usage from some of own software ***
//------------------------------------------------------------------------------
void send_err_msg(int err) // messages after command completion
{
switch ( err )
{ case 0: break; // no error, no message
case 1: put_ee_text(OK_MSG); // OK message only
break;
case 2: put_ee_text(UNK_CMD_MSG); // Unknown Command
break; // don't type with fingers crossed
case 3: put_ee_text(LEN_ERR_MSG); // Wrong Command Length
break; // don't lean on the keybored
case 4: put_ee_text(NUM_ERR_MSG); // Numeric Error
break; // not all digits
case 5: put_ee_text(HEX_ERR_MSG); // Hex Error
break; // the spell's gone wrong
case 6: put_ee_text(RNG_ERR_MSG); // Number out of Range
break; // cowboys on the loose
default: put_ee_text(UNK_ERR_MSG); // unknown error number
}
send_crlf();
}
___________________________
This message was ported from CCS's old forum
Original Post ID: 12041 |
|
![](templates/subSilver/images/spacer.gif) |
Hans Wedemeyer Guest
|
Re: Packing Messages on 18F252 |
Posted: Sun Feb 23, 2003 9:54 pm |
|
|
The 18F252 store two bytes per location.
Read it into a sturct/union and access one byte at a time.
___________________________
This message was ported from CCS's old forum
Original Post ID: 12046 |
|
![](templates/subSilver/images/spacer.gif) |
Keith Lockstone
Joined: 18 May 2004 Posts: 1 Location: Matfield, Kent, England.
|
Program Available for packing strings into program memeory |
Posted: Tue May 18, 2004 3:29 am |
|
|
I've done a .exe to process a text file into a .h file for #including in programs. It is designed to work with 16F887 and 18F452 processors.
Please email me if you're interested as it needs beta testing.
Keith.
(Original poster of this idea) |
|
![](templates/subSilver/images/spacer.gif) |
|
|
You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum
|
Powered by phpBB © 2001, 2005 phpBB Group
|