UART in nRF51822 Evaluation kit won't receive

[Allan]

I'm load the UART example (pca10001) to the Evaluation Kit, i can see using hyperterminal the messages send by the kit ( the Start message) but after that i wont be able to receive any input from the CPU, im using all the parameter given in the SDK webpage and cannot find the problem.

[Hung Bui]

Hi Allan,

I am sorry for the late response. I noticed that you might have selected nrf51822_xxaa_s110 in the Target drop down tab. When you select this option you would need to program softdevice at region 0 first because the application code will be flashed at address 0x14000 instead of 0x000000

I would suggest you to use nrf51822_xxaa target instead.

If the issue remains, could you run the device in debug mode and click stop to see the device stay at the loop to wait for NRF_UART0->EVENTS_RXDRDY != 1 ?

[Allan]

Thanks for the reply, i followed your suggestiong and used nrf51822_xxaa , and the problem persist, i cheked in degub mode and as you said, i stay in the loop waiting for RXDRDY, i also tried the loopback mode , connecting directly tx and rx and it would give me an error turning on the led. I also cheked that the connections SB9,SB10,SB11 and SB12 are not open.