Can i2c converter

The Alpha Station framework is ready to go to work monitoring and controlling using Visual Studio Community Edition free from Microsoft. Alpha Station provides you with a working sample framework, take a look at the source code to see how easy it is to control this display:. Alpha Station gives you the tools you need to quickly read and display Analog to Digital Values such as the MAX connected to a 8-Channel Multiplexer to display the result.

When the chip returns a response, it should be 2 bytes in Length. The value can then be displayed directly to the console. Alpha Station Libraries make it easy to control hardware. Values from 0 to are supported as well as brightness levels of 0 to Simple library calls are all it takes to setup a dedicated hardware numeric display.

As the CPU is currently very full, code has been optimized in this version to reduce memory usage, Clearing the way for a Version 6.

This version also includes all Version 3 Changes. Documentation for this update is currently being prepared. Mechanical Drawing. Nick Alexeev Nick Alexeev Huisman Huisman Harper Harper 1. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. The Overflow Blog. Does ES6 make JavaScript frameworks obsolete? Podcast Do polyglots have an edge when it comes to mastering programming Featured on Meta.

Now live: A fully responsive profile. Related 3. This command reference guide will help get you started using AnyI2C hardware and software using our latest V6 hardware communications protocols. Here we will explain the improvements with detailed samples to help get you started quickly. In future tutorials, we will show you how the same processor will allow for Wireless I2C Communications.

This version also includes all Version 3 Changes. As the CPU is currently very full, code has been optimized in this version to reduce memory usage, Clearing the way for a Version 6.

Version 6 includes many improvements over version 5. Like Version 5, this device is configured using Alpha Station 1. Alpha Station 1. The following features were added to Version 6 Firmware. The following command, 0xFE 0x21 is a simple test for 2-way communications between the device and the controller. They are identified as Payload bytes in the packet structure shown below. This number will always scale with the number of payload bytes in the API frame. Calculating the Checksum is relatively easy.

The checksum value is always truncated to the lower 8 bits and is calculated by adding Bytes 1 through 4 together. There are a couple of easy ways to truncate the value to the lower 8 bits.

The easiest way is to define a variable that is only a byte in size. Most programming languages will automatically truncate if the checksum is defined as a byte rather than a word or an integer.

Other programming languages may require you to accumulate the value as a integer or a word. In this case, the lower 8 bits must be extracted using the mathematical AND function. In the previous section of this guide, we demonstrated how to send data to the Serial to I2C Converter at a baud rate of If you actually sent the data to a NCD controller, you should receive the following response packet or something very similar :.

The response packet above also includes a checksum for the 4th byte. This checksum is calculated in the exact same way as the transmission packet. Communicating to I2C devices over a serial connection presents some unique challenges.

We have hidden these challenges from the user to help simplify communications. We will not go into the full depth of I2C communications here, as the topic is too far outside the scope of this guide. Instead, we will focus on the two essential elements of communicating to I2C devices: Transmitting and Receiving.

All I2C devices have a start address. This start address will be referenced in all transmit and receive operations. For instance, you will often be required to write to the I2C device to move the pointer to a specific register.

Using a second operation, you will read data from the register. It is normal to write and then read from a I2C device using two transactions. Some I2C chips may be slow to provide a response. In some cases, it may be necessary to send several communication queries to a given device to check flags and read data once the device is ready. We will try to provide numerous samples for talking to many kinds of I2C devices.

As we progress through the samples shown below, it will be necessary for you to have some mechanism of communications to the AnyI2C processor via the USART. In some cases, the AnyI2C processor is installed on a hat or shield, ready to work with another microprocessor. We will be using Comm Operator as we advance through the samples. Comm Operator is our preferred tool for testing ALL controllers we manufacture. Comm Operator is available from SerialPortTool.

Once you have an understanding of these 3 essential components, writing I2C data is very straightforward. Data bytes are optional for some I2C chips, as it all depends on the memory organization of each individual I2C device. Take a look at the sample below.

If you happen to have this chip connected, you will receive the following response:. Receiving data from I2C devices is very similar to transmitting. This operation is relatively easy, since it only requires a I2C Start Address and the total number of bytes to read from the I2C device. Please note that a read operation typically follows a write operation. This sample will be a little more complicated, as we need to do a little bit of setup before we can read from the PC chip.

We will start with configuring the PCA for input mode. This only needs to be done one time to initialize the inputs for reading inputs. Next, we will move the address pointer to location 0. This memory address will reflect the status of the digital inputs. Finally, we will perform a read operation and examine the result. Without this step, the inputs will never appear to change state. The PCA includes a small memory register used for various settings.

Location 0 may be used to read the inputs of all GPIO pins. Before every read operation, the address pointer must be relocated to address location 0. The command Structure is as follows:. A value of 0 indicates no delay. If you experience communication errors with this command, try lengthening the time between write and read operations, this can usually resolve communication errors. The following sample will communicate to a MCP and reads 2 bytes of data back from the I2C chip:.

This command may prove useful in the event an error occurs communicating with a I2C device. There are two commands that may be issued to the Serial to I2C Converter for the purposes of rebooting the firmware. We have never seen a need for these commands, but we included them just in case.

Soft reboot simply restarts the firmware from the beginning. Communicating to I2C devices is not always a successful operation. There are several conditions that can lead to I2C error codes. As the CPU moves through the different I2C communication routines, a error code is associated with each low-level I2C function is assigned. The firmware is designed to immediately exit and return the first error that is detected.

This helps users identify different error conditions. Here is a list of all possible error codes:. Most errors are related to an incorrect I2C start address. Make sure the correct I2C start address is indicated in all routines. A fixed timeout is hard-coded into the firmware.

Should a chip exceed this preset timeout, you will receive an Acknowledgement error. NCD CPUs do not allow for blocking calls; therefore, the preset timeout value is very short, and may require you to request data in a different way usually by checking a flag before reading data. Errors are expressed in the form of a API return frame, which included both the error code and the inverse error code to help eliminate confusion regarding a return result.

Error codes are expressed in the following sequence:. Now that we have learned how to read and write data to the I2C port using serial commands, we need to simplify the context so we can move through samples at a faster pace.

From this point on, tables will not identify every single byte. Instead, they will be referenced on a single line. We will re-write all tables in the following format to condense information into a smaller footprint. We use this chip extensively for controlling relays and fets as well as input detection of contact closures and voltage detection applications.