ADS1259操作问题

只看该作者 · 2012-4-23 09:13

本帖最后由 jhbang 于 2012-8-31 17:41 编辑

用SPI口操作ADS1259时，初始化写操作正确，但是在用读寄存器命令读时，是从第三个寄存器开始读，而且第一次发读命令，读不上来数据，第二次发读命令时，才能读到数据。求TI技术人员支持。

只看该作者 · 2012-4-23 09:48

希望问题解决后，上来跟大家分享一下。

只看该作者 · 2012-4-24 13:28

读取操作方法是否正确？如下
RREG: Read from Registers
Description: These opcode bytes read register data. The Register Read command is a two-byte opcode
followed by the output of the register data. The first byte contains the command opcode and the register address.
The second byte of the opcode specifies the number of registers to read – 1.
First opcode byte: 0010 rrrr, where rrrr is the starting register address.
Second opcode byte: 0000 nnnn, where nnnn is the number of registers to read.
The 17th SCLK rising edge of the operation clocks out the MSB of the first register

只看该作者 · 2012-4-24 13:30

读取操作方法是否正确？如下
RREG: Read from Registers
Description: These opcode bytes read register data. The Register Read command is a two-byte opcode
followed by the output of the register data. The first byte contains the command opcode and the register address.
The second byte of the opcode specifies the number of registers to read – 1.
First opcode byte: 0010 rrrr, where rrrr is the starting register address.
Second opcode byte: 0000 nnnn, where nnnn is the number of registers to read.
The 17th SCLK rising edge of the operation clocks out the MSB of the first register