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發(fā)視頻AD7193-適用于瑞薩微控制器平臺(tái)的無(wú)操作系統(tǒng)驅(qū)動(dòng)程序
資料介紹
Table of Contents
AD7193 - No-OS Driver for Renesas Microcontroller Platforms
Supported Devices
Evaluation Boards
Overview
The AD7193 is a low noise, complete analog front end for high precision measurement applications. It contains a low noise, 24-bit sigma-delta (Σ-Δ) analog-to-digital converter (ADC). The on-chip low noise gain stage means that signals of small amplitude can interface directly to the ADC.
The device can be configured to have four differential inputs or eight pseudo differential inputs. The on-chip channel sequencer allows several channels to be enabled simultaneously, and the AD7193 sequentially converts on each enabled channel, simplifying communication with the part. The on-chip 4.92 MHz clock can be used as the clock source to the ADC or, alternatively, an external clock or crystal can be used. The output data rate from the part can be varied from 4.7 Hz to 4.8 kHz.
The device has a very flexible digital filter, including a fast settling option. Variables such as output data rate and settling time are dependent on the option selected. The AD7193 also includes a zero latency option.
The part operates with a power supply from 3 V to 5.25 V. It consumes a current of 4.65 mA, and it is available in a 28-lead TSSOP package and a 32-lead LFCSP package.
Applications
The goal of this project (Microcontroller No-OS) is to be able to provide reference projects for lower end processors, which can't run Linux, or aren't running a specific operating system, to help those customers using microcontrollers with ADI parts. Here you can find a generic driver which can be used as a base for any microcontroller platform and also specific drivers for different microcontroller platforms.
Driver Description
The driver contains two parts:
- The driver for the AD7193 part, which may be used, without modifications, with any microcontroller.
- The Communication Driver, where the specific communication functions for the desired type of processor and communication protocol have to be implemented. This driver implements the communication with the device and hides the actual details of the communication protocol to the ADI driver.
The Communication Driver has a standard interface, so the AD7193 driver can be used exactly as it is provided.
There are three functions which are called by the AD7193 driver:
- SPI_Init() – initializes the communication peripheral.
- SPI_Write() – writes data to the device.
- SPI_Read() – reads data from the device.
SPI driver architecture
The following functions are implemented in this version of AD7193 driver:
| Function | Description |
|---|---|
| char AD7193_Init(void) | Checks if the AD7139 part is present. |
| void AD7193_SetRegisterValue(unsigned char registerAddress, unsigned long registerValue, unsigned char bytesNumber, unsigned char modifyCS) | Writes data into a register. |
| unsigned long AD7193_GetRegisterValue(unsigned char registerAddress, unsigned char bytesNumber, unsigned char modifyCS) | Reads the value of a register. |
| void AD7193_Reset(void) | Resets the device. |
| void AD7193_SetPower(unsigned char pwrMode) | Set device to idle or power-down. |
| void AD7193_WaitRdyGoLow(void) | Waits for RDY pin to go low. |
| void AD7193_ChannelSelect(unsigned short channel) | Selects the channel to be enabled. |
| void AD7193_Calibrate(unsigned char mode, unsigned char channel) | Performs the given calibration to the specified channel. |
| void AD7193_RangeSetup(unsigned char polarity, unsigned char range) | Selects the polarity of the conversion and the ADC input range. |
| unsigned long AD7193_SingleConversion(void) | Returns the result of a single conversion. |
| unsigned long AD7193_ContinuousReadAvg(unsigned char sampleNumber) | Returns the average of several conversion results. |
| float AD7193_TemperatureRead(void) | Read data from temperature sensor and converts it to Celsius degrees. |
| float AD7193_ConvertToVolts(unsigned long rawData, float vRef) | Converts 24-bit raw data to volts. |
Downloads
- PmodAD5 Demo for RL78G14: https://github.com/analogdevicesinc/no-OS/tree/master/Renesas/RL78G14/PmodAD5
- RL78G14 Common Drivers: https://github.com/analogdevicesinc/no-OS/tree/master/Renesas/RL78G14/Common
Renesas RL78G13 Quick Start Guide
This section contains a description of the steps required to run the AD7193 demonstration project on a Renesas RL78G13 platform.
Required Hardware
Required Software
Hardware Setup
A PmodAD5 has to be connected to the PMOD1 connector, pins 1 to 6 (see image below).
- When using AVDD > DVDD (= 3.3V), JP1 on PmodAD5 must be removed. The range for AVDD is 3.0V ≤ AVDD ≤ 5.25V
Reference Project Overview
The reference project:
- checks if the AD7193 part is present;
- configures the AD7193 part for differential input on CH0(AIN1-AIN2);
- first reads data from a single conversion and displays it;
- then reads data from multiple conversions, calculates the average value and displays it;
- in the end reads data from the temperature sensor and displays it in degrees Celsius.
Software Project Setup
This section presents the steps for developing a software application that will run on the Renesas Demo Kit for RL78G13 for controlling and monitoring the operation of the ADI part.
- Run the IAR Embedded Workbench for Renesas RL78 integrated development environment.
- Choose to create a new project (Project – Create New Project).
- Select the RL78 tool chain, the Empty project template and click OK.
- Select a location and a name for the project (ADIEvalBoard for example) and click Save.
- Open the project’s options window (Project – Options).
- From the Target tab of the General Options category select the RL78 – R5F100LE device.
- From the Setup tab of the Debugger category select the TK driver and click OK.
- Extract the files from the lab .zip archive and copy them into the project’s folder.
- The new source files have to be included into the project. Open the Add Files… window (Project – Add Files…), select all the copied files and click open.
- At this moment, all the files are included into the project.
- The project is ready to be compiled and downloaded on the board. Press the F7 key to compile it. Press CTRL + D to download and debug the project.
- A window will appear asking to configure the emulator. Keep the default settings and press OK.
- To run the project press F5.
Renesas RL78G14 Quick Start Guide
This section contains a description of the steps required to run the AD7193 demonstration project on a Renesas RL78G14 platform using the PmodAD5.
Required Hardware
Required Software
- The AD7193 demonstration project for the Renesas RL78G14 platform.
The AD7193 demonstration project for the Renesas RL78G14 platform consists of three parts: the AD7193 Driver, the PmodAD5 Demo for RL78G14 and the RL78G14 Common Drivers.
All three parts have to be downloaded.
Hardware Setup
A PmodAD5 has to be connected to the PMOD1 connector, pins 1 to 6 (see image below).
- When using AVDD > DVDD (= 3.3V), JP1 on PmodAD5 must be removed. The range for AVDD is 3.0V ≤ AVDD ≤ 5.25V
Reference Project Overview
The reference project:
- checks if the AD7193 part is present;
- configures the AD7193 part for differential input on CH0(AIN1-AIN2);
- first reads data from a single conversion and displays it;
- then reads data from multiple conversions, calculates the average value and displays it;
- in the end reads data from the temperature sensor and displays it in degrees Celsius.
Software Project Tutorial
This section presents the steps for developing a software application that will run on the Renesas Demo Kit for RL78G14 for controlling and monitoring the operation of the ADI part.
- Run the IAR Embedded Workbench for Renesas RL78 integrated development environment.
- Choose to create a new project (Project – Create New Project).
- Select the RL78 tool chain, the Empty project template and click OK.
- Select a location and a name for the project (ADIEvalBoard for example) and click Save.
- Open the project’s options window (Project – Options).
- From the Target tab of the General Options category select the RL78 – R5F104PJ device.
- From the Setup tab of the Debugger category select the TK driver and click OK.
- Copy the downloaded files into the project's folder.
- The new source files have to be included into the project. Open the Add Files… window (Project – Add Files…), select all the copied files and click open.
- At this moment, all the files are included into the project.
- The project is ready to be compiled and downloaded on the board. Press the F7 key to compile it. Press CTRL + D to download and debug the project.
- A window will appear asking to configure the emulator. Keep the default settings and press OK.
- To run the project press F5.
Renesas RX62N Quick Start Guide
This section contains a description of the steps required to run the AD7193 demonstration project on a Renesas RX62N platform.
Required Hardware
Required Software
Hardware Setup
A PmodAD5 has to be interfaced with the Renesas Demonstration Kit (RDK) for RX62N:
PmodAD5 Pin 1 (CS) → YRDKRX62N J8 connector Pin 15 PmodAD5 Pin 2 (MOSI) → YRDKRX62N J8 connector Pin 19 PmodAD5 Pin 3 (MISO) → YRDKRX62N J8 connector Pin 22 PmodAD5 Pin 4 (CLK) → YRDKRX62N J8 connector Pin 20 PmodAD5 Pin 5 (GND) → YRDKRX62N J8 connector Pin 4 PmodAD5 Pin 6 (VCC) → YRDKRX62N J8 connector Pin 3
Reference Project Overview
The reference project:
- checks if the AD7193 part is present;
- configures the AD7193 part;
- reads data from multiple conversions, calculates the average value and displays it;
- reads data from the temperature sensor and displays it in degrees Celsius.
Software Project Setup
This section presents the steps for developing a software application that will run on the Renesas Demo Kit for RX62N for controlling and monitoring the operation of the ADI part.
- Run the High-performance Embedded Workshop integrated development environment.
- A window will appear asking to create or open project workspace. Choose “Create a new project workspace” option and press OK.
- From “Project Types” option select “Application”, name the Workspace and the Project “ADIEvalBoard”, select the “RX” CPU family and “Renesas RX Standard” tool chain. Press OK.
- A few windows will appear asking to configure the project:
- In the “Select Target CPU” window, select “RX600” CPU series, “RX62N” CPU Type and press Next.
- In the “Option Setting” windows keep default settings and press Next.
- In the “Setting the Content of Files to be generated” window select “None” for the “Generate main() Function” option and press Next.
- In the “Setting the Standard Library” window press “Disable all” and then Next.
- In the “Setting the Stack Area” window check the “Use User Stack” option and press Next.
- In the “Setting the Vector” window keep default settings and press Next.
- In the “Setting the Target System for Debugging” window choose “RX600 Segger J-Link” target and press Next.
- In the “Setting the Debugger Options” and “Changing the Files Name to be created” windows keep default settings, press Next and Finish.
- The workspace is created.
- The RPDL (Renesas Peripheral Driver Library) has to integrated in the project. Unzip the RPDL files (double-click on the file “RPDL_RX62N.exe”). Navigate to where the RPDL files were unpacked and double-click on the “Copy_RPDL_RX62N.bat” to start the copy process. Choose the LQFP package, type the full path where the project was created and after the files were copied, press any key to close the window.
- The new source files have to be included in the project. Use the key sequence Alt, P, A to open the “Add files to project ‘ADIEvalBoard’” window. Double click on the RPDL folder. From the “Files of type” drop-down list, select “C source file (*.C)”. Select all of the files and press Add.
- To avoid conflicts with standard project files remove the files “intprg.c” and “vecttbl.c” which are included in the project. Use the key sequence Alt, P, R to open the “Remove Project Files” window. Select the files, click on Remove and press OK.
- Next the new directory has to be included in the project. Use the key sequence Alt, B, R to open the “RX Standard Toolchain” window. Select the C/C++ tab, select “Show entries for: Include file directories” and press Add. Select “Relative to: Project directory”, type “RPDL” as sub-directory and press OK.
- The library file path has to be added in the project. Select the Link/Library tab, select “Show entries for: Library files” and press Add. Select “Relative to: Project directory”, type “RPDL/RX62N_library” as file path and press OK.
- Because the “intprg.c” file was removed the “PIntPrg” specified in option “start” has to be removed. Change “Category” to “Section”. Press “Edit”, select “PIntPRG” and press “Remove”. From this window the address of each section can be also modified. After all the changes are made press OK two times.
- At this point the files extracted from the zip file located in the “Software Tools” section have to be added into the project. Copy all the files from the archive into the project folder.
- Now, the files have to be included in the project. Use the key sequence Alt, P, A to open the “Add files to project ‘ADIEvalBoard’” window. Navigate into ADI folder. From the “Files of type” drop-down list, select “Project Files”. Select all the copied files and press Add.
- Now, the project is ready to be built. Press F7. The message after the Build Process is finished has to be “0 Errors, 0 Warnings”. To run the program on the board, you have to download the firmware into the microprocessor’s memory.
More information
- Example questions:
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