This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

ADS1148 SPI 問題



Dear Sir :

 當我在驗證SPI 功能時, 其寫入順序如下

 16      --- STATAC

400001  -- Register MUX0    Value 01

420030 -- Register MUX1   Value 30

410000 -- Register Vbias  Value 00

4a0007 -- Register IDAC0 Value 07

4b0001 -- Register IDAC1  Value 01

220000 -- Read Mux1 Register

FF       -- NOP  , Then Read Value is 30

FF     -- NOP

在第ㄧ個NOP 時, SDI 讀到30, 這是對的, 然後將MUX1 寫入32,

卻ㄧ樣得到30, 將MUX1 寫入34, 可以得到34, 不知是何原因.