无法使PSOC1 DAC工作

你好，
多亏了社区，我解决了很多问题，但这一次让我绝望。
我的项目是通过控制MOSFET晶体管的开度来控制低功率刷直流电机的速度。我用开发的KIT-01和PSoC3原型，但由于成本，我必须移动到PSoC1。
我没有启动DAC工作的试验成功。我已经通过了大量的附注和数据表，但仍然没有运气。我的项目必须进入PCB阶段，但我没有运气选择芯片PSOC3是昂贵的，但PSoC1不工作。
塞浦路斯的支持对我没有帮助——他们倾向于每10天回复一次，大多数想法与我的项目无关。IGET更多的调查从他们然后帮助。
最近，PoSO1示例“3”ADC到UART与DAC“只是为了确保IDO是正确的，但是再次DACNOT工作。我想，因为编译的例子正在工作。
附上的项目是我的试验，遵循相同的硬件设置和复制。我不明白。
非常感谢您的帮助。
奥列格
还有一个问题：有什么想法，DAC的输出阻抗是什么？为了控制MOSFET的栅极，我必须用OPAMP来缓冲它吗？
tim2.Zip
559.5 K



     以下为原文
  Hi,
    thanks to the community I've solved many problems but this one made me desperate.
    My project is controlling speed of a low power brushed dc motor by controlling openning of a mosfet transistor. I prototyped it with development kit-001 and psoc3 but due to the cost I have to move to psoc1.
    None of my trial to start DAC working succeeded. I have gone through lots of appnotes and datasheets but still no luck. My project has to go to the PCB stage but I have no luck with choosing chip - PSOC3 is expensive but PSOC1 is not working.
    Cypress support is no help for me - they tend to reply once per 10 days with most ideas not relative to my project. I get more surveys from them then help.
    Lately I followed psoc1 example#3 "ADC to UART with DAC" just to make sure I do everithing right but again DAC not  working. I think, I missed something because compiled example is working.
    Attached project is my trial to follow the examle with the same hardware settings and copied main.c - and still doesn't work. I can't understand that.
    Any help is greatly appreciated,
    Oleg
    and another questions: any ideas what the output impedance of the dac? do I have to buffer it with opamp in order to control gate of a mosfet?

•   temp2.zip 559.5 K