Hello All,
I'm trying to program a NRF51822 module for the first time. I'm using the Jlink for ARM from IAR which is segger rebranded. It supports JTAG and SWD.
We got a module from Raytac. The module mfg recommended a 12K ohm pulldown resistor tied to the SWCLK pin. I went ahead and added the pull down.
Using Keil, when I try to program I get an error message saying that "Erase Failed!" but if I go on Keil and do a "Full Erase" it works fine. I know that if the full erase worked my Softdevice is gone but at this point I just need to overcome the programming issue then I will program the Softdevice back.
Please see below. Any clues?
Load "C:\Nordic Semiconductor\nRF51 SDK_v6.1.0.0\Nordic\nrf51822\Board\pca10001\blinky_example\arm\_build\blinky_arm.axf" Set JLink Project File to "C:\Nordic Semiconductor\nRF51 SDK_v6.1.0.0\Nordic\nrf51822\Board\pca10001\blinky_example\arm\JLinkSettings.ini"
- JLink Info: Device "NRF51822_XXAA" selected (257 KB flash, 16 KB RAM).
JLink info:
DLL: V4.92 , compiled Sep 30 2014 09:33:42 Firmware: J-Link ARM V7 compiled Jun 20 2012 19:45:53 Hardware: V7.00 S/N : 157001765 OEM : IAR
- 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 = 0xE00FF003
Target info:
Device: nRF51822_xxAA VTarget = 3.377V State of Pins: TCK: 0, TDI: 0, TDO: 1, TMS: 0, TRES: 1, TRST: 0 Hardware-Breakpoints: 4 Software-Breakpoints: 8192 Watchpoints: 2 JTAG speed: 9600 kHz
Erase Failed! Error: Flash Download failed - "Cortex-M0"
