FreeCalypso > hg > freecalypso-tools
comparison target-utils/libcommon/cmd_w16.c @ 0:e7502631a0f9
initial import from freecalypso-sw rev 1033:5ab737ac3ad7
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Sat, 11 Jun 2016 00:13:35 +0000 |
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-1:000000000000 | 0:e7502631a0f9 |
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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 } |