Add --verify-loaded option.

[aka-mj]

Prints out CRC from configuration file and the CRC from loaded configuration
in NVRAM. Will return exit code of 0 if they match or an exit
code of 1 if they do not.

# mxt-app --verify-loaded /lib/firmware/maxtouch.xcfg -v 1
CRC from config file  : 0x35B5CF
CRC from NVRAM        : 0x35B5CF
# echo $?
0
# mxt-app --verify-loaded /lib/firmware/Rev03.xcfg -v 1
CRC from config file  : 0x772DE2
CRC from NVRAM        : 0x35B5CF
CRC's do not match, configuration is not loaded
# echo $?
1

[mgong98]

There are 3 warnings to resolve on compile and 1 change made before code can be merged. 1 warning causes a segmentation fault. Please also update to latest code in master branch before doing new pull request.

Following changes are needed:

Warning #1:
src/mxt-app/mxt_app.c:937:22: warning: implicit declaration of function ‘mxt_get_config_crc’ [-Wimplicit-function-declaration]
uint32_t nvcrc = mxt_get_config_crc(mxt);

Add:
#include "libmaxtouch/msg.h" to include files at top of mxt_app.c file

Warning #2:
src/mxt-app/menu.c:262:5: warning: implicit declaration of function ‘mxt_print_config_crc’ [-Wimplicit-function-declaration]
mxt_print_config_crc(mxt);

Add:
void mxt_print_config_crc(struct mxt_device *mxt); to msg.h file
#include "libmaxtouch/msg.h" to include files at top of menu.c file

Correct:
ret = mxt_checkcrc(ctx, mxt, strbuf, cfcrc); to ret = mxt_checkcrc(ctx, mxt, strbuf, &cfcrc);

Initialize the nvcrc under main in mxt-app.c file
uint32_t nvcrc = 0;

Change to:
nvcrc = mxt_get_config_crc(mxt); in mxt-app.c file

[mgong98]

Ignore this one. Fixed in latest branch to be merged.
Add:
void mxt_print_config_crc(struct mxt_device *mxt); to msg.h file
#include "libmaxtouch/msg.h" to include files at top of menu.c file