Add write register instruction.

[TavakoliAli]

Added capabilities:

1. Change Baudrate
2. Change security level
3. Change packet size

Added methods:

• Private:
  1. uint8_t writeRegister (uint8_t regAdd, uint8_t value) To implement write register instruction (0x0E). This method will called from following methods.
• Public:
  1. uint8_t Adafruit_Fingerprint::setBaudRate (uint8_t baudrate) To change the UART baudrate. The supported baudrates are defined as FINGERPRINT_BAUDRATE_xxxx where xxxx is Baudrate number in Adafruit_Fingerprint.h file.
  2. uint8_t Adafruit_Fingerprint::setSecurityLevel (uint8_t level) To change the security level. The supported security levels are defined as FINGERPRINT_SECURITY_LEVEL_x where x is level number in Adafruit_Fingerprint.h file. The required notes about security levels are added also.
  3. uint8_t Adafruit_Fingerprint::setPacketSize (uint8_t size) To change packet size. The supported packet sizes are define as FINGERPRINT_PACKET_SIZE_xxx were xxx is size of packet in Adafruit_Fingerprint.h* file.

Tested methods:

The setBaudRate and setSecurityLevel methods are tested but i don't know use case of packet size so i can not test it.

[ladyada]

hiya! thanks so much for submitting a PR! we can review & merge PRs once they have passed continuous integration (CI). that means that code compiles cleanly for all tested platforms, is clang formatted so we maintain the same text formatting for all new code, and is doxygen documented. if your code isnt passing, check the CI output (click on the red X next to the PR to scroll through the log and find where the error is

here is a tutorial on doxygen: https://learn.adafruit.com/the-well-automated-arduino-library/doxygen

and clang-format: https://learn.adafruit.com/the-well-automated-arduino-library/formatting-with-clang-format

and overall how to contribute PRs to libraries: https://learn.adafruit.com/contribute-to-arduino-with-git-and-github

once you get that green checkmark that indicates CI has passed, please comment reply to this post so we know its time for another review (we may not get notified on CI pass and miss that its time to look!)

[TavakoliAli]

hiya! thanks so much for submitting a PR! we can review & merge PRs once they have passed continuous integration (CI). that means that code compiles cleanly for all tested platforms, is clang formatted so we maintain the same text formatting for all new code, and is doxygen documented. if your code isnt passing, check the CI output (click on the red X next to the PR to scroll through the log and find where the error is

here is a tutorial on doxygen: https://learn.adafruit.com/the-well-automated-arduino-library/doxygen

and clang-format: https://learn.adafruit.com/the-well-automated-arduino-library/formatting-with-clang-format

and overall how to contribute PRs to libraries: https://learn.adafruit.com/contribute-to-arduino-with-git-and-github

once you get that green checkmark that indicates CI has passed, please comment reply to this post so we know its time for another review (we may not get notified on CI pass and miss that its time to look!)

Hi. I fix the warnings and pass all tests.

[ladyada]

nice work!