FreeCalypso > hg > freecalypso-tools

annotate target-utils/pln-ppb-test/read_id.c @ 1009:4a153059abbb

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doc/DUART28-boot-control: update for fc-linux-patch and fc-usbser-tools
author Mychaela Falconia <falcon@freecalypso.org>
date Tue, 12 Dec 2023 06:57:11 +0000
parents 5a6019ed7e72
children
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5a6019ed7e72 pln-ppb-test: implement read-id
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1 /*
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2 * read-id (Autoselect) command
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3 */
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4
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5 #include <sys/types.h>
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6 #include "types.h"
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7
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8 void
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9 cmd_read_id(argbulk)
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10 char *argbulk;
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11 {
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12 char *argv[2];
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13 u_long addr;
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14
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15 if (parse_args(argbulk, 1, 1, argv, 0) < 0)
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16 return;
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17 if (parse_hexarg(argv[0], 8, &addr) < 0) {
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18 printf("ERROR: argument must be a valid 32-bit hex address\n");
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19 return;
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20 }
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21 if (addr & 0xFFFF) {
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22 printf("ERROR: address is not on 64 KiB boundary\n");
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23 return;
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24 }
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25 *(volatile u16 *)(addr + 0xAAA) = 0xAA;
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26 *(volatile u16 *)(addr + 0x554) = 0x55;
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27 *(volatile u16 *)(addr + 0xAAA) = 0x90;
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28 }