ads1298r

你好：  我现在设计用的是ADS1298R，，电路原理图使用的是评估版推荐电路，自己设计的PCB，调试中出现了问题

1 针对ADS129 内部寄存器操作 可正确的写入和读出

2 测试内部信号（温度，test）,得到的转换结果数据均不正常

3 将设计的PCB板上的AD1298管脚信号 与 评估版 做了对比测试，未发现异常

急阿 帮个忙 看看问题可能出现在那

北京有技术支持吗？ 能否帮忙测测我的板子

MichaelSheep：

您好，

能问下你测出来的数据不正常，是多少？ 跳动很厉害还是很稳定？

还有就是除了温度和test，其他测试，例如输入个固定的直流电压，测出的值有误吗？还是只有温度和test信号有问题。

yuxiang jiang：

回复 MichaelSheep:

你好：

1 收到的数据看不出规律

2 这一行是复位后读出的寄存器值

   D2 06 00 40 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0F 00 00 00 00 00

 

3 这一行是写入后读出的寄存器值（4个通道关电源  3个通道输入短路  1个通道为温度值）

  D2 86 10 DC 03 84 81 81 81 01 01 01 04 00 00 00 00 00 00 00 0F 00 00 00 00 00

 

4 以下是多次读取的转换结果数据

C0 00 03 00 00 00 00 00 00 00 00 00 00 00 00 C2 F4 F5 9B 11 82 38 39 74 A0 A6 44

C0 00 03 00 00 00 00 00 00 00 00 00 00 00 00 C6 5D F7 98 51 E5 36 ED 32 A2 90 19

 C0 00 03 00 00 00 00 00 00 00 00 00 00 00 00 C3 45 55 9A 04 82 37 3E 1C A0 05 32

 C0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 C4 12 D2 97 DE FA 38 92 AB 9F 37 6C

C0 00 03 00 00 00 00 00 00 00 00 00 00 00 00 C6 D4 81 99 68 87 37 6E 91 9D 61 53

C0 00 03 00 00 00 00 00 00 00 00 00 00 00 00 C6 03 3D 97 FD 6D 37 ED D4 9F 1B F2

 C0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 C8 1D 83 9E 07 55 36 23 05 A5 A4 B2

C0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 C8 43 44 9D 79 92 37 33 62 A2 39 F8

C0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 C5 84 E4 9F 32 BC 35 B3 BC A3 E9 F6

 C0 00 03 00 00 00 00 00 00 00 00 00 00 00 00 C2 EA 22 97 06 96 38 6F 70 9D 7B F8

C0 00 03 00 00 00 00 00 00 00 00 00 00 00 00 C1 23 51 9D 0E 7B 37 52 21 A1 FB 12

C0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 C4 5B 41 9A 54 E8 36 6F BC A6 7D 6C

 C0 00 03 00 00 00 00 00 00 00 00 00 00 00 00 C6 18 B4 97 F5 10 36 76 C7 A0 D8 D5

C0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 C9 6C D4 9C 42 1C 36 9D 89 A3 78 2F

 C0 00 03 00 00 00 00 00 00 00 00 00 00 00 00 C4 48 E8 97 94 D7 38 CB 43 9F C4 F0

 C0 00 03 00 00 00 00 00 00 00 00 00 00 00 00 C3 26 18 96 F9 D3 37 7E 2B A2 3F F0

 C0 00 01 00 00 00 00 00 00 00 00 00 00 00 00 C8 C8 B8 98 75 B1 38 64 ED 9E 8F F9

 C0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 C7 66 F9 9E C8 5E 36 91 1D A2 17 CC

 C0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 C5 5C 72 99 FB A8 37 1F 61 A1 26 B8

 C0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 C6 61 1A 9E 6B BE 36 AF 0E A4 DF 4D

 C0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 C5 54 F0 97 BD 37 38 73 D1 A0 49 D8

 C0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 C6 1A 5C 97 C9 7B 36 E6 41 A1 73 F2

 C0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 CA 59 4E 99 B0 20 37 C3 CB 9F 93 EA

5 这一行是重新写入后并读出的寄存器值（8通道 TEST值）

  D2 86 10 DC 03 65 65 65 65 15 15 15 15 00 00 00 00 00 00 00 3F 00 00 00 00 00

6 以下是多次读取的转换结果数据

C0 00 00 68 C3 A2 9C 46 3F 7F FF FF 80 00 00 B1 D1 6D 80 00 00 4F 46 88 80 00 00

C0 00 00 69 0B 8A 9A 55 7E 7F FF FF 80 00 00 B2 2F 91 80 00 00 4E F3 2B 80 00 00

C0 00 00 6A 62 68 98 1B 03 7F FF FF 80 00 00 B4 5D 6A 80 00 00 4F C9 7E 80 00 00

C0 00 00 68 B8 7E 98 DE 9E 7F FF FF 80 00 00 B4 02 5C 80 00 00 4F 18 40 80 00 00

C0 00 00 69 6E D7 9B A2 40 7F FF FF 80 00 00 B3 6A 82 80 00 00 4F DA D6 80 00 00

C0 00 00 69 9A B2 9A 31 5E 7F FF FF 80 00 00 B4 65 6A 80 00 00 4F 83 2E 80 00 00

C0 00 00 68 EB 56 9E 8C E5 7F FF FF 80 00 00 B1 AA DB 80 00 00 4F 42 04 80 00 00

C0 00 03 6A 2F 25 9B 29 B3 7F FF FF 80 00 00 AF 76 B1 80 00 00 4F BE 59 80 00 00

C0 00 03 68 E0 58 9D 51 ED 7F FF FF 80 00 00 B5 32 8F 80 00 00 4F 37 E3 80 00 00

 C0 00 00 68 7D DD 9A 0C 0D 7F FF FF 80 00 00 B4 41 0F 80 00 00 4E A3 34 80 00 00

 C0 00 00 69 90 50 98 BE BD 7F FF FF 80 00 00 B0 05 48 80 00 00 4F 22 1F 80 00 00

C0 00 00 68 92 9B 9A B5 5A 7F FF FF 80 00 00 B1 D2 69 80 00 00 4E 7F E1 80 00 00

 C0 00 00 67 E9 56 9B 96 06 7F FF FF 80 00 00 B1 BE 48 80 00 00 4E AA 0A 80 00 00

C0 00 00 69 1E 0B 9B 12 EC 7F FF FF 80 00 00 AF B4 97 80 00 00 4E 8D 3C 80 00 00

C0 00 00 69 A0 31 9B DA D3 7F FF FF 80 00 00 B4 27 AC 80 00 00 4F 67 55 80 00 00

C0 00 00 69 DE BC 97 29 F9 7F FF FF 80 00 00 B3 37 0C 80 00 00 4F AF 92 80 00 00

 C0 00 03 68 ED C8 99 CB 23 7F FF FF 80 00 00 B1 17 D9 80 00 00 4F 46 1D 80 00 00

 

7 这一行是重新写入后并读出的寄存器值（8通道 MVDD）

D2 86 10 DC 03 11 11 11 11 11 11 11 11 00 00 00 00 00 00 00 3F 00 00 00 00 00

8 以下是多次读取的转换结果数据

C0 00 03 69 24 F6 90 6C 96 7F FF FF 80 00 00 B0 C1 42 80 00 00 4F BC 04 80 00 00

C0 00 00 67 E7 3C 9B B1 8A 7F FF FF 80 00 00 B1 0A 1A 80 00 00 4D B8 DC 80 00 00

C0 00 03 6B 8E D4 8C 0D 1B 7F FF FF 80 00 00 AF F1 C6 80 00 00 51 14 B4 80 00 00

C0 00 03 6A BB 2D 8E FF 0D 7F FF FF 80 00 00 B0 99 0B 80 00 00 50 39 11 80 00 00

C0 00 00 69 E3 CA 8B 79 ED 7F FF FF 80 00 00 B0 62 52 80 00 00 4F D4 99 80 00 00

C0 00 00 6A CB D2 8E DD 65 7F FF FF 80 00 00 AF EC 38 80 00 00 51 0E 9B 80 00 00

C0 00 00 6A 43 50 92 97 0F 7F FF FF 80 00 00 B1 A8 E6 80 00 00 50 17 3D 80 00 00

C0 00 03 6A 40 74 92 34 3B 7F FF FF 80 00 00 B4 46 40 80 00 00 4F E7 A0 80 00 00

C0 00 03 68 8A 69 8E C9 3B 7F FF FF 80 00 00 B0 BF 6E 80 00 00 4E C2 47 80 00 00

C0 00 03 69 B8 37 8F A3 DA 7F FF FF 80 00 00 B0 17 6B 80 00 00 4F D9 98 80 00 00

C0 00 00 69 CC CC 92 1D 7A 7F FF FF 80 00 00 AE 82 75 80 00 00 50 6E BA 80 00 00

C0 00 00 6A 18 44 92 32 3D 7F FF FF 80 00 00 AE 78 D0 80 00 00 4F D5 FE 80 00 00

C0 00 00 66 E4 4E 94 16 25 7F FF FF 80 00 00 AF BD D5 80 00 00 4D 8E A7 80 00 00

 

9 程序在评估板上测试过，读出的信号是正常的

10  我的电路上1298 使用的为内基准，

  上电复位后  VREFP管脚电压为-2.5v ，

  在读取测量过程中VREFP管脚电压为0v

11  E4管脚

   手册上说接       (DGND)

   ADS1298RECG-FE上说接 （AGND）

   我的PCB上 DGND 和 AGND 是分开的采用单点连接到一起， E4管脚连接到DGND 

puling wang：

你好，我最近也在用ADS129x这个系列的片子，遇到了一些问题，现在寄存器都无法写入和读出，能否加下QQ，向你请教一下，谢谢

hongfei xue：

回复 yuxiang jiang:

您好，最近我也在用ADS1298这款芯片在做心电测试仪，不过自己编的程序总有问题，您能不能抽时间给我发一下您的程序呢？真的非常感谢。我想借鉴一下。我的邮箱是2641990582@qq.com。灰常感谢。

yuxiang jiang：

回复 puling wang:

没有QQ  可以把接口图和程序发给我 ，帮你看看  xxtyuxiang@buu.edu.cn

yuxiang jiang：

回复 hongfei xue:

可以把程序发给我 帮你看看

chengyi liu：

回复 yuxiang jiang:

最后是怎么解决的呢？我也遇到跟你一样的问题。读到数据显示不出波形，不过参考电压配置为2.4V后，实际测量正确为-0.1V。我使用正负2.5供电。