FreeCalypso > hg > freecalypso-sw

annotate loadtools/hexdecode.c @ 992:a7b0b426f9ca

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target-utils: boot ROM UART autodetection revamped The new implementation should work with both the familiar Calypso C035 boot ROM version found in our regular targets as well as the older Calypso F741979B version found on the vintage D-Sample board.
author Mychaela Falconia <falcon@ivan.Harhan.ORG>
date Wed, 30 Dec 2015 21:28:41 +0000
parents aa1f6fe16fef
children
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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1 /*
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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2 * This module contains the decode_hex_byte() function,
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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3 * which is used by the SREC file reader and will likely be used
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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4 * by other code as well, such as the dump-to-file function
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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5 * of loadtool.
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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6 */
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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7
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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8 #include <ctype.h>
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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9
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10 decode_hex_byte(s)
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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11 char *s;
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12 {
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13 register int u, l;
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14
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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15 if (!isxdigit(s[0]) || !isxdigit(s[1]))
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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16 return(-1);
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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17 if (isdigit(s[0]))
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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18 u = s[0] - '0';
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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19 else if (isupper(s[0]))
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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20 u = s[0] - 'A' + 10;
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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21 else
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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22 u = s[0] - 'a' + 10;
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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23 if (isdigit(s[1]))
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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24 l = s[1] - '0';
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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25 else if (isupper(s[1]))
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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26 l = s[1] - 'A' + 10;
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27 else
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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28 l = s[1] - 'a' + 10;
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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29 return((u << 4) | l);
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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30 }