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comparison target-utils/libcommon/cmd_w16.c @ 0:e7502631a0f9

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initial import from freecalypso-sw rev 1033:5ab737ac3ad7
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 11 Jun 2016 00:13:35 +0000
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-1:000000000000 0:e7502631a0f9
1 /*
2 * w16 hexaddr xxxx -- write a 16-bit register or memory location
3 */
4
5 #include <sys/types.h>
6 #include "types.h"
7
8 void
9 cmd_w16(argbulk)
10 char *argbulk;
11 {
12 char *argv[3];
13 u_long addr, data;
14
15 if (parse_args(argbulk, 2, 2, argv, 0) < 0)
16 return;
17 if (parse_hexarg(argv[0], 8, &addr) < 0) {
18 printf("ERROR: arg1 must be a valid 32-bit hex address\n");
19 return;
20 }
21 if (addr & 1) {
22 printf("ERROR: unaligned address\n");
23 return;
24 }
25 if (parse_hexarg(argv[1], 4, &data) < 0) {
26 printf("ERROR: arg2 must be a valid 16-bit hex value\n");
27 return;
28 }
29 *(volatile u16 *)addr = data;
30 }