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comparison target-utils/pln-ppb-test/read_id.c @ 988:5a6019ed7e72

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pln-ppb-test: implement read-id
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 03 Dec 2023 00:04:18 +0000
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987:6b87de9e385b 988:5a6019ed7e72
1 /*
2 * read-id (Autoselect) command
3 */
4
5 #include <sys/types.h>
6 #include "types.h"
7
8 void
9 cmd_read_id(argbulk)
10 char *argbulk;
11 {
12 char *argv[2];
13 u_long addr;
14
15 if (parse_args(argbulk, 1, 1, argv, 0) < 0)
16 return;
17 if (parse_hexarg(argv[0], 8, &addr) < 0) {
18 printf("ERROR: argument must be a valid 32-bit hex address\n");
19 return;
20 }
21 if (addr & 0xFFFF) {
22 printf("ERROR: address is not on 64 KiB boundary\n");
23 return;
24 }
25 *(volatile u16 *)(addr + 0xAAA) = 0xAA;
26 *(volatile u16 *)(addr + 0x554) = 0x55;
27 *(volatile u16 *)(addr + 0xAAA) = 0x90;
28 }