谢谢原子哥帮顶.

 谁有空帮确认下现在程序对与不对就？我自认为程序应该不会错，示波器我也抓来看了波形，没数据出来。芯片IO口我看了多次，NXP M3的，除了没高阻态悬浮态。我把接收IO设成输入态准备接收数据时，示波器的显示会随最后输出态而定，即最后输出为高，就为高，最后输出为低就为低。

上面贴的图片自己看不到，所以又贴了一个。 主要读操作在PDF 49页。

主要根据下面的意思写的读程序，图片可能看不到，就贴先字了：

5.1.3 SerialInterface
The selection of this interface is done by IM3, IM2, IM1 and IM0.
The serial interface can select IM3= 0 or 1 to decide the trigger edge of serial clock (SCL) is rising edge or falling
edge. The serial  interface is used to communication  between  the  micro  controller  and  the  LCD  driver  chip.  It
contains CSX(chip select), SCL (serial clock), SDI (serial data input) and SDO (serial data output). Serial clock
(SCL) is used for interface with MPU only, so it can be stopped when no communication i s necessary. If the host
places  the  SDI  line  into  high-impedance  state  during  the  read  intervals,  then  the  SDI  and  SDO  can  be  tied
together.

5.1.3.2 READ MODE
The read mode of the interface means that the micro controller reads register value from the NT35510. To do so
the  micro  controller  first  has  to  send  a  command  and  then  the  following  byte  is  transmitted  in  the  opposite
direction. After that CSX is required to go high before a new command is send ( see  Fig. 5.1.6). The  NT35510
samples the SDI (input data) at the rising edges, but shifts SDO (output data) at the falling SCL edges. Thus the
micro controller is supported to read data at therising SCL edges. After the read status command has been sent,
the SDI line must be set to tri-state no later than at the falling SCL edge of the last bit. For the memory data read,
a dummy clock cycle is needed (16 SCL clocks) to wait the memory data send out in SPI interface. But it doesn't
need any dummy clock when execute the command data read.

谢谢各位大神关注！

ytmkkk1986 发表于 2015-4-12 22:03
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