Hi all, I'm designing my own breakout board for nrf51822 and want to use the mbed platform for it. I was able to make the board work with a very simple, blinking-LED program. However, i run into some issues while using the Heart Rate example in mbed.
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First of all, when i flashed the combined hex file into the chip using Ulink2 debugger. The program wouldn't run at all. The prog would stop right at the beginning (address 0x0). I think it's supposed to start at address 0x14000 according to the scatter-loading file included in the project file.
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Then, i tried to download the softdevice seperately at address 0x0, then downloaded the application hex code into another region (starting from 0x14000). This approach actually works 'partially' :(. The prog would run and halt at sd_softdevice_enable() function, which is used to set up LFCLK source and enable soft device. It throws an Hard_fault exception. Checking the LFCLK souce, it's already initialized and started.
I have no idea what is going wrong here. Should the way i used to flash the chip have anything to do with this? Besides, how can i use the combined hex file? i couldn't make it work by just downloading this hex file into the chip.
