Broadcaster/observer low level implementation

Question

In one of my current projects, I need: 
 
 to have access to more than 8 kB of RAM (which is not possible when using SoftDevice) 
 to have Observer role (which apparently is not implemented in SoftDevice) 
 
 Since I don't use any other functionality from the SoftDevice, I decided to implement the Observer and to reimplement the Broadcaster roles. After reading the specification Bluetooth Low Energy Link Layer and nRF51822 RADIO specification I developed a little firmware that makes passive scanning in the advertise channels 37, 38 and 39 using a 1 second scanWindow and 2 seconds scanInterval. 
 To evaluate my implementation I put BlueZ 5.x to do advertising and I checked with another BlueZ 5.x if the advertising is correct. Then I put my firmware (source code attached) to run. Although the packet are apparently received, their contents are wrong (check the attached log): 
 
 received packets are different in each channel 
 CRC check fails 
 invalid header fields (PDU type, TxAdd, RxAdd, ...) 
 invalid payload (it doesn't contains the advertiser address 00:1B:DC:05:4B:DF) 
 
 I tried to put a lot of comments in the source file but english is not my first language, so I apologize in advance for any linguistic mistake. 
 What can I do to fix my firmware? 
 log.txt 
 main.c

Ole Morten · Accepted Answer

Your code looks good in general, and I suspect that the only thing you're missing is to set the data whitening initialization vector. See section 3.2 in the Core Specification, Volume 6, part B. 
 Setting this on the nRF51 can be done by just setting the DATAWHITEIV register the channel number (i.e. 37 for the first advertising channel). Doing so, it seems to me that your code is working fine. 
 Just out of curiosity, is there any particular reason you're using defines instead of regular functions?