e-paper, e-ink 라고 하는데요,

보유중인 STM32L0538 Discovery 테스트 중에 e-paper의 왕짜증 나는 점을 발견해서 공유 합니다.

e-paper 특성상 전원이 꺼지거나, 혹은 극소모전류로 화면을 유지 하는 특성이 있는데요,

일반적인 모듈들은 partial update을 지원하지 않으므로 부분 갱신을 위해서는 항상 전체 화면을 갱신 해야 하고, 

전체 화면 갱신시 아래 1번 동영상과 같이 멍청한 blink 가 2번 나오게 됩니다.

더불어 update갱신 속도는 아래 datasheet 에서 발견한 부분을 보면 1.8sec 입니다.

개인적으로 시계 구현중에  아래 lcd 모듈로는 1초 마다 화면 update가 불가능이라는 걸 깨달았습니다.

용도마다 틀리니 잘 구분해서 사용하시길 바랍니다!!

더불어 화면상의 particle 이라고 해야 하나??? 아무튼 원래 화면 표시 데이터 외에 쓰래가 입자들이 무수하게 분포 되어 있어서

육안 상으로는 상당히 지저분 해 보이는데, 동영상으로 올리니 한개도 안보이네요. 이것도 참고..

1. partial update 미지원 모듈

lcd module datasheet

GDE021A1 (1).pdf

2. partial update 지원 모듈

http://www.buy-lcd.com/index.php?route=product/category&path=2897_9715

nRF51822 BLE 시작하기.

현재 쉽게 접할 수 있는 솔류션은 TI, Nordic 정도 입니다.

TI는 8051 Base, 

Nordic은 Cortex-M0 Base입니다.

저는 당근 Cortex계열 선택 합니다....

그래서 일단 Nordic 계열로 넘어 갑니다.

요약 하자면 개인 스터디 용도면 1번,

회사면 2번,3번 

땜질에 자신 있으면 3번빼고, 2번만 사서 진행 하시면 됩니다.

전 2번만 사서 진행 중입니다.

1. nRF51822 Evaluation Kit (nRF51822-EK)

- 개인적으로 소규모 개인 개발 시작단계라면 추천 드리겠습니다.

   USB Dongle은 Master Emulator 또는 Packet Snipper로 사용됩니다.

   보드에 정중앙 큰 MCU는 J-Link IC이고, 왼쪽 작은 IC가 51822 입니다.

   단돈 10만원에...모십니다.

http://kr.mouser.com/ProductDetail/Nordic-Semiconductor/nRF51822-EK/?qs=sGAEpiMZZMvQuebtxbmqHcwahSg6lJax

The evaluation kit gives you the lowest cost entry point to development with the nRF51822.

A J-Link Lite evaluation unit is included in the nRF51422 Development Kit. Please note that programming and debugging functionality on the evaluation kit is limited to the kit itself. To be able to program and debug on your own hardware, you will need a standalone programmer/debugger such as the J-Link PLUS, J-Link ULTRA+, or J-Link Pro which is available for purchase on www.segger.comThe kit operates stand alone, and is based around a small module with headers for all IO pins, 2 buttons, 2 LED's as well as a built-in Segger on board programming and debugging over USB solution. This board is accompanied by a USB dongle with identical features except for access to I/O pins. This board can act as wireless peer device or it can act as a very small Software development platform in itself. The kit also contains 5 IC samples. The evaluation kit is supported by pre-qualified Bluetooth Smart (previously calledBluetooth low energy) stacks offered as SoftDevices as well as library and code example support in the nRF51 Software Development kit supporting all nRF51 series devices.

2. nRF51822 Development Kit (nRF51822-DK)

-  회사에서 개발 시작단계라면 추천 드리겠습니다.

   USB Dongle은 Master Emulator 또는 Packet Snipper로 사용됩니다.

   nRF51822 모듈이 각 2개 있으며, J-Link가 독립적으로 분리되어 있습니다.

   마찬가지로 단돈 10만원에 모시지만, 제 역활을 하기 위해서는 아래 3번인 nRFgo 보드가 있어야 편리 합니다.(없으면 일일이 SW,LED,파워,UART등을 손땜으로 구성해야 합니다. T.T)

http://kr.mouser.com/ProductDetail/Nordic-Semiconductor/nRF51822-DK/?qs=sGAEpiMZZMvQuebtxbmqHZoJdvgx4vK9

The development kits are supported by pre-qualified Bluetooth Smart stacks available as SoftDevices and an extencive library and code example support in the nRF51 Software Development Kit supporting all the devices in the nRF51 series.The nRF51822 development kit is nRFgo compatible and enables you to do more advanced development especially when integrating with external circuitry. The development kit provides you nRFgo compatible modules with PCB antennas as well as SMA connetors for RF measurements, USB dongles to act as peer devices and a stand alone segger Jlink Lite programmer and debugger that enables programming/debugging on the nRFgo modules as well as on your own protoype/engineering hardware.

For more details and product related downloads, go to the nRF51822 Development Kit page.

3. nRFgo

-  회사에서 개발 시작단계라면 추천 드리겠습니다.

   이놈은 단돈 40만원입니다.. 갑자기 비싸지네요.

http://kr.mouser.com/ProductDetail/Nordic-Semiconductor/nRF6700/?qs=yd0qOhnSiDe4PB8L1P%2fXJg%3d%3d

 The base for the nRFgo development platform is a starter kit which contains 2 nRFgo motherboards as well as all necessary patch and USB cables for more advanced prototyping. The nRFgo mother board is a large and stable platform which gives you access to all I/O pins, 8 buttons and LED's as well as a large extension module socket that maps all the I/O pins of the nRFgo development kit modules that plugs into the nRFgo motherboard. The nRFgo development kits enables you to program the nRFgo modules themselves or your own engineering samples either through the nRFgo motherboard itself or included stand alone programmers/debuggers.

The advantage of the nRFgo development platform is that it can be used accross all nrF51 series devices as well as older (nRF24L and nRF8000) series of nRF devices. If you have used other nRF devices there is no need to replace the nRFgo starter kit and even if you are new to nRF devices but plan to use different variants nRFgo gives you a common HW platform to work on accross your products.nRFgo mother board is complimented by a nRFgo studio a PC program enabling you to control and program a number of attached nRFgo kits, run various tests and control supply level to the development kits.

For more details please download the nRF51822 starter kit user guide. (this will require that we put the user guide out separately, not as part of the installer as today) (this link requires mypage login, if you don't already have a mypage account, choose 'new user' and follow the instructions)

출처 : NXP

내용 : 4Wire Touchscrren Interface에 대한 원리, 설명, MCU AD Port로 처리시 C Source

점수 : 90점

첨부 참고 하세요!!

AN10675.pdf