After programming S110 SoftDevice, I get "Erase Failed! Error: Download Failed - Cortex M0

[rbunn]

I have a 51822-DK board. I have followed all of the instructions to set up the environment. Loaded all NRF tools, Keil v 5, install SDK. I began working on the examples. I was able to run the blinky example and load the chip. Then I programmed the S110 soft device. I loaded up the heart rate monitor example as suggested in the SDK documentation (using the pack installer) . I was able to successfully compile it but not able to load it onto the chip. I've wasted 2 days on this. Please help!

Here is some background on what I have already tried. Checked target and it is set to S110. Checked memory target. Checked programming algorithms. See attached screenshots of configuration. See screenshots for configuration.

I am getting the following output when trying to upload:

Rebuild target 'nrf51422_xxac_s110' compiling main.c... compiling bsp.c... assembling arm_startup_nrf51.s... compiling system_nrf51.c... compiling ble_bas.c... compiling ble_dis.c... compiling ble_hrs.c... compiling ble_srv_common.c... compiling device_manager_peripheral.c... compiling ble_advdata.c... compiling ble_conn_params.c... compiling nrf_delay.c... compiling app_uart_fifo.c... compiling pstorage.c... compiling app_button.c... compiling app_error.c... compiling app_fifo.c... compiling app_gpiote.c... compiling app_scheduler.c... compiling app_timer.c... compiling app_trace.c... compiling ble_sensorsim.c... compiling nrf_assert.c... compiling retarget.c... compiling softdevice_handler.c... linking... Program Size: Code=15176 RO-data=332 RW-data=328 ZI-data=3648
FromELF: creating hex file... "._build\nrf51422_xxac_s110.axf" - 0 Error(s), 0 Warning(s). Build Time Elapsed: 00:00:14 Load "C:\Users\Rona\Documents\Development Kit Files\Examples\ble_peripheral\ble_app_hrs\pca10028\s110\arm5\_build\nrf51422_xxac_s110.axf" Set JLink Project File to "C:\Users\Rona\Documents\Development Kit Files\Examples\ble_peripheral\ble_app_hrs\pca10028\s110\arm5\JLinkSettings.ini"

• JLink Info: Device "NRF51822_XXAC" selected.

JLink info:

DLL: V4.96d, compiled Jan 29 2015 11:45:37 Firmware: J-Link OB-SAM3U128-V2-NordicSemi compiled Nov 28 2014 10:32:04 Hardware: V1.00 S/N : 681341448

• JLink Info: Found SWD-DP with ID 0x0BB11477
• JLink Info: Found Cortex-M0 r0p0, Little endian.
• JLink Info: FPUnit: 4 code (BP) slots and 0 literal slots ROMTableAddr = 0xF0000003

Target info:

Device: nRF51822_xxAC VTarget = 3.300V State of Pins: TCK: 0, TDI: 1, TDO: 1, TMS: 1, TRES: 1, TRST: 1 Hardware-Breakpoints: 4 Software-Breakpoints: 8192 Watchpoints: 2 JTAG speed: 1000 kHz

Erase Failed! Error: Flash Download failed - "Cortex-M0" Flash Load finished at 19:22:06

[rbunn]

In a last ditch effort, I kept looking. I found another post that focused me back on the memory setting. I erased the flash with nrf studio and reprogrammed it. I noticed that the memory location changed in the application section of the window. I changed the memory in the target settings in Keil and recompiled it. I was able to upload. I'm not sure if it is fixed as the new application doesn't seem to work but I'll post that as a new question if I can't figure it out.

[Charles Manning]

From the target setup it is apparent that you are setting the executable IROM address space to 0x00000-0x1FFFF.

This will mean that any code you generate will try to overwrite the soft device, so the erase fails.

What you need to do is select the correct build target: either nrf51822_xaa_s110 (256kB) or rf51822_xaa_s110 (128kB).

This will set the IROM addresses as 0x18000-0x1FFFF.

That does not overlap the softdevice and is where the soft device expects an application to be.

[Annim]

Important Address ( under Target options settings in Keil IDE )

Address without BLE Softdevice( BLE STACK ) application:

In case application runs over bluestack softdevice then address will be

• Address are : IROM1 : 0x16000 - 0x29000
• Address are : IRAM1 : 0x20002000 - 0x2000

In case application runs without bluestack softdevice then address will be

• Address are : IROM1 : 0x0 - 0x40000
• Address are : IRAM1 : 0x20000000 - 0x4000

Rest of the default setting i request not to be changed until you are sure about it. Once i was also using keil to flash up the binaries but it screwed up the chip itself by messing up in driver or erasing chip as well. Hence i tried recovering the chip first. Search around the net you will get the correct way to recover the chip if you are not getting a proper window in nrfGo Studio application. I suggest you to use nrfGO Studio application for uploading your application, softdevice and bootloader binaries. These are the above settings which got me working on it. I hope this would have helped you.