FreeCalypso > hg > freecalypso-tools
diff target-utils/libcommon/cmd_r16.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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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/target-utils/libcommon/cmd_r16.c Sat Jun 11 00:13:35 2016 +0000 @@ -0,0 +1,26 @@ +/* + * r16 hexaddr -- read a 16-bit register or memory location + */ + +#include <sys/types.h> +#include "types.h" + +void +cmd_r16(argbulk) + char *argbulk; +{ + char *argv[2]; + u_long addr; + + if (parse_args(argbulk, 1, 1, argv, 0) < 0) + return; + if (parse_hexarg(argv[0], 8, &addr) < 0) { + printf("ERROR: argument must be a valid 32-bit hex address\n"); + return; + } + if (addr & 1) { + printf("ERROR: unaligned address\n"); + return; + } + printf("%04X\n", *(volatile u16 *)addr); +}