Problems flashing hex file to nRF51

Question

I just got a nRF51 and am having trouble getting started with it. I created a very simple program using the mbed compiler and produced a hex file which I now wish to flash to the nRF51. I fire up nRFGo Studio, select nRF51 Bootloader in the Device Manager window, select my hex file, select the COM port which is labelled Segger and hit Program. I get messages in the Log as follows: 
 Progress 0
Transmission timeout
Ack out of sequence or not ack returned. 
 Or at least that's what I used to get. Now I'm not seeing the COM port for Segger. 
 Could you help me get started please? 
 Thank you

bluetooth_mdw · Accepted Answer

I resolved the file size issue. Not sure what the root cause really was but I reinstalled the mbed interface firmware by dragging and dropping the file "nrf51822aa_atsam3u2c_if_mbed_V0216_04062014.bin" onto the nRF51 in bootloader mode (it gets treated as a mass storage device by Windows) and power cycling. After that I could drag/drop the hex file output by the mbed compiler again.

Problems flashing hex file to nRF51

Top Replies