长城电源FRU分析

原创已于 2024-12-19 13:52:15 修改 · 822 阅读

6 ·

CC 4.0 BY-SA版权

文章标签：

#python

于 2024-11-27 13:40:46 首次发布

BMC 专栏收录该内容

4 篇文章

订阅专栏

一.实际数据区

0 1 2 3 4 5 6 7 8 9 a b c d e f 0123456789abcdef
00: 01 01 00 00 03 0b 00 f0 01 23 00 00 00 64 02 00 ??..??.??#...d?.
10: 00 00 00 00 00 00 12 02 01 08 00 ca 47 52 45 41 ......????.?GREA
20: 54 20 57 41 4c 4c cc 43 52 50 53 31 33 30 30 44 T WALL?CRPS1300D
30: 32 20 20 cc 43 52 50 53 31 33 30 30 44 32 20 20 2 ?CRPS1300D2
40: c3 30 31 20 cf 32 4f 30 35 34 30 34 35 38 32 32 ?01 ?2O054045822
50: 20 20 20 20 c0 c0 c1 4b 00 02 18 5a 8c 14 05 ff ???K.??Z???.
60: ff ff 00 28 23 90 33 50 46 20 67 00 3f 0a 0e ff ...(#?3PF g.???.
70: 0f 00 00 00 00 09 02 0d d5 13 01 c4 04 88 04 00 ?....??????????.
80: 05 78 00 64 00 cc 29 01 82 0d 86 ea 82 c4 04 88 ?x.d.?)?????????
90: 04 00 05 78 00 64 00 b8 0b 00 00 00 00 00 00 00 ?.?x.d.??.......
a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
f0: 70 53 e8 03 cf 0a 00 00 00 00 00 00 00 00 00 00 pS????..........

二.COMMON HEADER
0 Common Header Format Version           01
1 Internal Use Area Starting Offset 01 1*8 =8 0x08 确定偏移位置
2 Chassis Info Area Starting Offset 00
3 Board Area Starting Offset 00
4 Product Info Area Starting Offset 03 3*8 =24 0x18
5 MultiRecord Area Starting Offset 0b   11*8=88 0x58
6 PAD, write as 00h 00
7 Common Header Checksum                   f0

三.Internal Use Area Format
8 Internal Use Format Version 01
9-17 Internal use data 23 00 00 00 64 02 00 00 00 00 00 00 00 12 02
(没固定要求)

四.Product Info Area Format
18 Product Area Format Version 01
19 Product Area Length 08
1a Language Code 00 en
1b Manufacturer Name type/length byte ca
0xca 0011 1010 type [7-6] = 00 binary or unspecified
length [5-0] = 111010=0x3a=58 (0x1b+0x3a=0x55)
1c-55 Manufacturer Name bytes
56 C1h (表示后面已经没有了).
57 Product Info Area Checksum 4b .

五.MultiRecord Area Record Header
58   Record Type ID 00---Power Supply Information
59 02
   [7:7] – End of list 0
   [6:4] – Reserved, write as 000b 000
   [3:0] – Record Format version 010
5a   Record Length 18   0x18=24 0x5c+0x18=0x74
5b   Record Checksum 5a
5c   Header Checksum 8c

五.1:Power Supply Information
off val name
0 1405
2 ffff Peak VA
4       ff Inrush current
5 00 Inrush interval in ms.
6   2328 Low end Input voltage range 1 0x2328=9000=90.00v
8   3390   High end Input voltage range 1 0x3390=13200=132.00v
10   4650 Low end Input voltage range 2 0x4650=18000=180.00v
12   6720 High end Input voltage range 2 0x6720=26400=264.00v
14       00 Low end Input frequency range           00hz
15       3f High end Input frequency range           63hz
16       0a Input dropout tolerance in ms 10ms
17       0e Binary flags:
18   0fff Peak Wattage.
20  000000 Combined Wattage
23       00 Predictive fail tachometer lower threshold

五.2:MultiRecord Area Record Header
75   Record Type ID 09---Extended DC Output
76 02
   [7:7] – End of list 0
   [6:4] – Reserved, write as 000b           000
   [3:0] – Record Format version 010
77   Record Length 0d   0xd=13 0x79+0xd=0x86
78   Record Checksum                           d5
79   Header Checksum                           13

  Extended DC Output (Record Type 0x09)
off val name
0   01
1   04c4
3 0488
5 0500
7 0078
9 0064
11 29cc

具体解释同下

五.3:MultiRecord Area Record Header
87   Record Type ID 01---DC Output
88 82
   [7:7] – End of list 1
   [6:4] – Reserved, write as 000b           000
   [3:0] – Record Format version 010
89   Record Length 0d   0xd=13 0x8b+0xd=0x98
8a   Record Checksum 86
8b   Header Checksum ea

  DC Output (Record Type 0x01)
off val name
0   82   Output information
1 04c4   Nominal voltage (10 mV) 0x4c4=1220=12.20v
3 0488 Maximum negative voltage (10 mV) 0x488=1160=11.60v
5 0500 Maximum positive voltage (10 mV) 0x500=1280=12.80v
7 0078 Ripple and Noise pk-pk 10Hz to 30 MHz (mV)   0x78=120=1.2v
9 0064 Minimum current draw (mA) 0x64=100ma
11 0bb8   Maximum current draw (mA) 0xbb8=3000ma

添加一个获取PSU信息的demo

#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <unistd.h>
#include <linux/i2c-dev.h>
#include <sys/ioctl.h>
#include <stdint.h>
#include <string.h>

#define I2C_BUS_TEMPLATE "/dev/i2c-%d"
#define MAX_BUS 9
#define MAX_ADDR 0xFF


 
void print_usage(const char *prog_name) {
    fprintf(stderr, "Usage: %s <bus> <add>\n", prog_name);
    fprintf(stderr, "  <bus>: I2C bus number (0-9)\n");
    fprintf(stderr, "  <add>: I2C address (0x00-0xFF)\n");
}
 
// 函数定义：以十六进制格式打印数组
void print_hex_array(const uint8_t *buffer, size_t length) {
    for (size_t i = 0; i < length; i++) {
        printf("%02X ", buffer[i]);
        if ((i + 1) % 16 == 0) { // 每行打印16个字节
            printf("\n");
        }
    }
    printf("\n"); // 在最后一行之后打印一个换行符
}
 
int main(int argc, char *argv[]) {
	
    if (argc != 3) {
        print_usage(argv[0]);
        return EXIT_FAILURE;
    }
 
    int bus_num = atoi(argv[1]);
    if (bus_num < 0 || bus_num > MAX_BUS) {
        fprintf(stderr, "Invalid bus number: %d\n", bus_num);
        print_usage(argv[0]);
        return EXIT_FAILURE;
    }
 
    unsigned int addr = strtoul(argv[2], NULL, 16);
    if (addr < 0x00 || addr > 0xff) {
        fprintf(stderr, "Invalid address: 0x%X\n", addr);
        print_usage(argv[0]);
        return EXIT_FAILURE;
    }
 
    char bus_path[32];
    snprintf(bus_path, sizeof(bus_path), I2C_BUS_TEMPLATE, bus_num);
 
    int file = open(bus_path, O_RDWR);
    if (file < 0) {
        perror("Failed to open the i2c bus");
        return EXIT_FAILURE;
    }
 
    if (ioctl(file, I2C_SLAVE, addr) < 0) {
        perror("Failed to acquire bus access and/or talk to slave");
        close(file);
        return EXIT_FAILURE;
    }
 
	uint8_t full_buffer[256];
 

    if (read(file, full_buffer, 256) != 256) {
        perror("Failed to read from the i2c bus");
        close(file);
        return EXIT_FAILURE;
    }
 
	//print_hex_array(full_buffer, 256);
    printf("PSU_info:%.23s\n", full_buffer + 0x1c);
    close(file);
    return 0;
}