FreeCalypso > hg > freecalypso-tools

annotate target-utils/flash-boot-test/watchdog.c @ 999:30fad2b3afd2

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doc/Flash-write-protection: document flash lock-state retrieval
author Mychaela Falconia <falcon@freecalypso.org>
date Mon, 04 Dec 2023 20:40:50 +0000
parents 3d7b546c710c
children
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1 #include <sys/types.h>
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2 #include "types.h"
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3
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4 void
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5 cmd_wd()
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6 {
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7 /* stop/disable the watchdog timer */
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8 *(volatile u16 *)0xFFFFF804 = 0xF5;
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9 *(volatile u16 *)0xFFFFF804 = 0xA0;
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10 }
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11
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12 void
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13 cmd_we()
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14 {
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15 /* watchdog enable */
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16 *(volatile u16 *)0xFFFFF804 = 0x8000;
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17 }
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18
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19 void
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20 cmd_wr()
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21 {
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22 /* read and display watchdog downcount register */
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23 printf("%04X\n", *(volatile u16 *)0xFFFFF802);
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24 }
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25
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26 void
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27 cmd_ww(argbulk)
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28 char *argbulk;
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29 {
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30 /* single or double write to WATCHDOG_TIM_MODE */
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31 char *argv[3];
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32 u_long w1, w2;
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33
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34 if (parse_args(argbulk, 1, 2, argv, 0) < 0)
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35 return;
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36 if (parse_hexarg(argv[0], 4, &w1) < 0) {
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37 printf("ERROR: arg1 must be a valid 16-bit hex value\n");
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38 return;
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39 }
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40 if (argv[1] && parse_hexarg(argv[1], 4, &w2) < 0) {
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41 printf("ERROR: arg2 must be a valid 16-bit hex value\n");
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42 return;
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43 }
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44 /* do it */
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45 *(volatile u16 *)0xFFFFF804 = w1;
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46 if (argv[1])
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47 *(volatile u16 *)0xFFFFF804 = w2;
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48 }