FreeCalypso > hg > freecalypso-tools

annotate target-utils/libcommon/cmd_w16.c @ 926:6a0aa8d36d06

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rvinterf backslash escape: introduce libprint The new helper function library named libprint is meant to replace the badly misnamed libg23, and will soon contain functions for printing all of the same kinds of GPF TST packets that are now handled in libg23. However, we are also moving safe_print_trace() from libasync to this new library, and changing it to emit our new backslash escape format.
author Mychaela Falconia <falcon@freecalypso.org>
date Tue, 23 May 2023 03:47:46 +0000
parents e7502631a0f9
children
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1 /*
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2 * w16 hexaddr xxxx -- write a 16-bit register or memory location
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3 */
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4
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5 #include <sys/types.h>
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6 #include "types.h"
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8 void
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9 cmd_w16(argbulk)
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10 char *argbulk;
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11 {
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12 char *argv[3];
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13 u_long addr, data;
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15 if (parse_args(argbulk, 2, 2, argv, 0) < 0)
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16 return;
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17 if (parse_hexarg(argv[0], 8, &addr) < 0) {
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18 printf("ERROR: arg1 must be a valid 32-bit hex address\n");
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19 return;
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20 }
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21 if (addr & 1) {
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22 printf("ERROR: unaligned address\n");
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23 return;
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24 }
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25 if (parse_hexarg(argv[1], 4, &data) < 0) {
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26 printf("ERROR: arg2 must be a valid 16-bit hex value\n");
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27 return;
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28 }
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29 *(volatile u16 *)addr = data;
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30 }