FreeCalypso > hg > freecalypso-tools
view target-utils/libcommon/cmd_w16.c @ 575:cef70d53fc5e
loadtools: new -P boot control mechanism implemented
author | Mychaela Falconia <falcon@freecalypso.org> |
---|---|
date | Sun, 02 Feb 2020 20:01:22 +0000 |
parents | e7502631a0f9 |
children |
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/* * w16 hexaddr xxxx -- write a 16-bit register or memory location */ #include <sys/types.h> #include "types.h" void cmd_w16(argbulk) char *argbulk; { char *argv[3]; u_long addr, data; if (parse_args(argbulk, 2, 2, argv, 0) < 0) return; if (parse_hexarg(argv[0], 8, &addr) < 0) { printf("ERROR: arg1 must be a valid 32-bit hex address\n"); return; } if (addr & 1) { printf("ERROR: unaligned address\n"); return; } if (parse_hexarg(argv[1], 4, &data) < 0) { printf("ERROR: arg2 must be a valid 16-bit hex value\n"); return; } *(volatile u16 *)addr = data; }