Embedded Issues Who worked on the nRF51822? I m having a problem, ask for guidance!

Go to the forum and ask, there are more people there.

You can understand it this way, PPI is a way to put Peripheral A and Peripheral B directly"Connections"mechanism. It can be compared to DMA. After setting the register, peripheral A triggers an event event that triggers a task through PPI, and the task is linked to peripheral B, that is, peripheral A triggers peripheral B.

The whole process does not require CPU involvement. The design of PPI is fantastic!

After that, the SDK (version released two weeks ago) of nrf51822 in the attachment and install. Some friends report that WinXP cannot be installed, and this reason may be that Microsoft is not installednet framework。

After installation, go to "Arm Device Nordic under your Keil installation path" and you will be able to see all the source code of the SDK.

I've written so much today, and many of you haven't received the development board yet. If you want to get ahead, please see the attached "Hands-on Guide", which is a must-see document after the development board arrives! In it, Yunyuan wrote everything that he was going to talk about the next one very clearly.

1.Weak signal, resulting in disconnection: poor antenna matching, low transmitting power, and poor sensitivity lead to weak signal; The signal is weak due to the distance between the transceiver modules; The signal is weak due to the shielding of the antenna receiving device.

2.The amount of data transmitted is large and the data flow is high, and the program may run away inside, resulting in disconnection.

3.There are a large number of other wireless signals in the Bluetooth band (band) that can cause crosstalk and disconnection.

The chip used in Skylab's Bluetooth module is NRF51822, so if you want to know more about the Bluetooth module, you can go to the official website to consult, I am happy to answer for you!

With the development of automobile gasoline engines in the direction of high speed, high compression ratio, high power, low fuel consumption and low emissions, the traditional ignition device has not adapted to the requirements of use. The core components of the ignition device are the ignition coil and the switchgear, and the spark plug can produce a spark with sufficient energy to increase the energy of the ignition coil, which is the basic condition for the ignition device to adapt to the operation of modern engines.

There are many eigenvalues, and to classify the eigenvalues, the class that comes out is the service, so a service must contain multiple eigenvalues.

There are many ways to make smart cups intelligent.

For example, the LEHOO smart water cup is intelligent by distinguishing real and fake bottled water, a certain open is intelligent by reminding to drink water, and it is also intelligent through temperature display.

First of all, how does Nordic claim that the protocol stack (called SoftDevice) and the application are completely separated? TI's protocol stack is provided in the form of a library, and the user application is linked to the library to form the final machine**, and TI provides the library and header files for the user to use. Nordic takes a different approach:

softdevice, such a stack and user.