電子發(fā)燒友App
創(chuàng)作
發(fā)文章
發(fā)帖 
提問(wèn) 
發(fā)資料
發(fā)視頻資料介紹
Table of Contents
AD7780 - No-OS Driver for Renesas Microcontroller Platforms
Supported Devices
Evaluation Boards
- PmodAD3
Overview
The AD7780 is a complete low power front-end solution for bridge sensor products, including weigh scales, strain gages, and pressure sensors. It contains a precision, low power, 24-bit sigma-delta (Σ-Δ) ADC; an on-chip, low noise programmable gain amplifier (PGA); and an on-chip oscillator.
Consuming only 330 μA, the AD7780 is particularly suitable for portable or battery-operated products where very low power is required. The AD7780 also has a power-down mode that allows the user to switch off the power to the bridge sensor and power down the AD7780 when not converting, thus increasing the battery life of the product.
For ease of use, all the features of the AD7780 are controlled by dedicated pins. Each time a data read occurs, eight status bits are appended to the 24-bit conversion. These status bits contain a pattern sequence that can be used to confirm the validity of the serial transfer.
The on-chip PGA has a gain of 1 or 128, supporting a full-scale differential input of ±5 V or ±39 mV. The device has two filter response options. The filter response at the 16.7 Hz update rate provides superior dynamic performance. The settling time is 120 ms at this update rate. At the 10 Hz update rate, the filter response provides greater than ?45 dB of stop-band attenuation. In load cell applications, this stop-band rejection is useful to reject low frequency mechanical vibrations of the load cell. The settling time is 300 ms at this update rate. Simultaneous 50 Hz/60 Hz rejection occurs at both the 10 Hz and 16.7 Hz update rates.
The AD7780 operates with a power supply from 2.7 V to 5.25 V. It is available in a narrow body, 14-lead SOIC package and a 16-lead TSSOP package.
Applications
- Weigh scales
- Pressure Measurement
- Industrial Process Control
- Portable instrumentation
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 AD7780 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 AD7780 driver can be used exactly as it is provided.
There are three functions which are called by the AD7780 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 AD7780 driver:
| Function | Description |
|---|---|
| char AD7780_Init(void) | Initializes the communication peripheral and checks if the device is present. |
| char AD7780_WaitRdyGoLow(void) | Waits for DOUT/RDY pin to go low. |
| long AD7780_ReadSample(unsigned char* pStatus) | Reads a 24-bit sample from the ADC. |
| float AD7780_ConvertToVoltage(unsigned long rawSample, float vRef, unsigned char gain) | Converts the 24-bit raw value to volts. |
HW Platform(s):
Downloads
- PmodAD3 Demo for RL78G14: https://github.com/analogdevicesinc/no-OS/tree/master/Renesas/RL78G14/PmodAD3
- 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 AD7780 demonstration project on a Renesas RL78G13 platform.
Required Hardware
Required Software
Hardware Setup
A PmodAD3 has to be connected to the PMOD1 connector.
- If using 3 external signals (AVDD, AIN and REF) then 2 jumpers on PmodAD3 must be off (JP1 and JP2).
- If using 2 external signals (AIN and REF) or (AIN and AVDD) then 1 jumper on PmodAD3 must be off (JP2 or JP1).
- Be aware that 0.5V ≤ Vref ≤ AVDD and 2.7V ≤ AVDD ≤ 5.25V.
- Be aware (especially when using gain = 128) that the common-mode voltage (AIN(+) + AIN(?)) / 2 must be ≥ 0.5V.
Reference Project Overview
The reference project:
- sets the update rate=16.7Hz and gain=1 for AD7780;
- initiates conversions;
- reads the captured data from AD7780 and displays it;
- displays some features of the conversion (gain, update rate, conversion status and serial transfer status).
- Reference voltage is 3300 mV default. If using another reference voltage, please check that the jumpers are properly set on the PmodAD3, and modify the vRef parameter in the ‘AD7780_ConvertToVoltage()’ function from ‘PmodAD3.c’.
Software Project Tutorial
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 AD7780 demonstration project on a Renesas RL78G14 platform using the PmodAD3.
Required Hardware
Required Software
- The AD7780 demonstration project for the Renesas RL78G14 platform.
The AD7780 demonstration project for the Renesas RL78G14 platform consists of three parts: the AD7780 Driver, the PmodAD3 Demo for RL78G14 and the RL78G14 Common Drivers.
All three parts have to be downloaded.
Hardware Setup
A PmodAD3 has to be connected to the PMOD1 connector (see image below).
- If using 3 external signals (AVDD, AIN and REF) then 2 jumpers on PmodAD3 must be off (JP1 and JP2).
- If using 2 external signals (AIN and REF) or (AIN and AVDD) then 1 jumper on PmodAD3 must be off (JP2 or JP1).
- Be aware that 0.5V ≤ Vref ≤ AVDD and 2.7V ≤ AVDD ≤ 5.25V.
- Be aware (especially when using gain = 128) that the common-mode voltage (AIN(+) + AIN(?)) / 2 must be ≥ 0.5V.
Reference Project Overview
The reference project:
- sets the update rate=16.7Hz and gain=1 for AD7780;
- initiates conversions;
- reads the captured data from AD7780 and displays it;
- displays some features of the conversion (gain, update rate, conversion status and serial transfer status).
- Reference voltage is 3300 mV default. If using another reference voltage, please check that the jumpers are properly set on the PmodAD3, and modify the vRef parameter in the ‘AD7780_ConvertToVoltage()’ function from ‘PmodAD3.c’.
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.
More information
- Example questions:
- An error occurred while fetching this feed: http://ez.analog.com/community/feeds/allcontent/atom?community=2077
掃碼添加小助手
加入工程師交流群
- AD5160-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
- 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
- AD5541A-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
- AD7091R-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
- AD74xx-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
- AD5933-瑞薩微控制器平臺(tái)的無(wú)操作系統(tǒng)驅(qū)動(dòng)程序
- AD7303-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
- AD7780-適用于單片機(jī)平臺(tái)的無(wú)操作系統(tǒng)驅(qū)動(dòng)程序
- ADXL345-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
- AD5781-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
- ADF7023-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
- ADP5589-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
- AD799x-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
- ADT7420-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
- AD7156-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
- 瑞薩RL78F24系列微控制器中的LIN總線主機(jī)配置方法 2.7k次閱讀
- 瑞薩CTSU程序在向嵌入式OS操作系統(tǒng)移植時(shí)的注意事項(xiàng) 1k次閱讀
- 深度解析全球操作系統(tǒng)格局 3.4k次閱讀
- 實(shí)時(shí)時(shí)鐘為微控制器系統(tǒng)增加了精確的計(jì)時(shí)功能 2.1k次閱讀
- 了解和使用無(wú)操作系統(tǒng)和平臺(tái)驅(qū)動(dòng)程序 2.1k次閱讀
- 瑞薩快速接入式物聯(lián)網(wǎng)平臺(tái)為快速原型開(kāi)發(fā)提供構(gòu)建模塊 797次閱讀
- 基于具有USB功能的STM32微控制器 4.4k次閱讀
- 嵌入式Linux內(nèi)核的驅(qū)動(dòng)程序開(kāi)發(fā)是怎樣的 1.9k次閱讀
- 淺談電腦驅(qū)動(dòng)程序的工作原理 詳解電腦驅(qū)動(dòng)程序意義 3.2w次閱讀
- 基于嵌入式Linux內(nèi)核的系統(tǒng)設(shè)備驅(qū)動(dòng)程序開(kāi)發(fā)設(shè)計(jì) 1.5k次閱讀
- 基于Linux2.6.30開(kāi)發(fā)DS18B20的驅(qū)動(dòng)程序的類型和文件操作接口函數(shù)詳解 1.8k次閱讀
- 基于STM32的數(shù)字PDA系統(tǒng)軟件系統(tǒng)設(shè)計(jì) 2k次閱讀
- 8155驅(qū)動(dòng)程序 3.8k次閱讀
- 基于STM32ZET6控制器的數(shù)字PDA系統(tǒng)的設(shè)計(jì) 1.9k次閱讀
- 基于FPGA嵌入式系統(tǒng)的設(shè)備驅(qū)動(dòng)開(kāi)發(fā) 2.7k次閱讀
上傳資料賺積分下載排行
本周
- 1新一代網(wǎng)絡(luò)可視化（NPB 2.0）
- 3.40 MB | 1次下載 | 免費(fèi)
- 2MDD品牌三極管MMBT3906數(shù)據(jù)手冊(cè)
- 2.33 MB | 次下載 | 免費(fèi)
- 3MDD品牌三極管S9012數(shù)據(jù)手冊(cè)
- 2.62 MB | 次下載 | 免費(fèi)
- 4聯(lián)想flex2-14D/15D說(shuō)明書(shū)
- 4.92 MB | 次下載 | 免費(fèi)
- 5收音環(huán)繞擴(kuò)音機(jī) AVR-1507手冊(cè)
- 2.50 MB | 次下載 | 免費(fèi)
- 624Pin Type-C連接器設(shè)計(jì)報(bào)告
- 1.06 MB | 次下載 | 免費(fèi)
- 7MS1000TA 超聲波測(cè)量模擬前端芯片技術(shù)手冊(cè)
- 0.60 MB | 次下載 | 免費(fèi)
- 8MS1022高精度時(shí)間測(cè)量(TDC)電路數(shù)據(jù)手冊(cè)
- 1.81 MB | 次下載 | 免費(fèi)
本月
- 1愛(ài)華AIWA HS-J202維修手冊(cè)
- 3.34 MB | 37次下載 | 免費(fèi)
- 2PC5502負(fù)載均流控制電路數(shù)據(jù)手冊(cè)
- 1.63 MB | 23次下載 | 免費(fèi)
- 3NB-IoT芯片廠商的資料說(shuō)明
- 0.31 MB | 22次下載 | 1 積分
- 4H110主板CPU PWM芯片ISL95858HRZ-T核心供電電路圖資料
- 0.63 MB | 6次下載 | 1 積分
- 5UWB653Pro USB口測(cè)距通信定位模塊規(guī)格書(shū)
- 838.47 KB | 5次下載 | 免費(fèi)
- 6技嘉H110主板IT8628E_BX IO電路圖資料
- 2.61 MB | 4次下載 | 1 積分
- 7蘇泊爾DCL6907(即CHK-S007)單芯片電磁爐原理圖資料
- 0.04 MB | 4次下載 | 1 積分
- 8100W準(zhǔn)諧振反激式恒流電源電路圖資料
- 0.09 MB | 2次下載 | 1 積分
總榜
- 1matlab軟件下載入口
- 未知 | 935137次下載 | 10 積分
- 2開(kāi)源硬件-PMP21529.1-4 開(kāi)關(guān)降壓/升壓雙向直流/直流轉(zhuǎn)換器 PCB layout 設(shè)計(jì)
- 1.48MB | 420064次下載 | 10 積分
- 3Altium DXP2002下載入口
- 未知 | 233089次下載 | 10 積分
- 4電路仿真軟件multisim 10.0免費(fèi)下載
- 340992 | 191439次下載 | 10 積分
- 5十天學(xué)會(huì)AVR單片機(jī)與C語(yǔ)言視頻教程 下載
- 158M | 183353次下載 | 10 積分
- 6labview8.5下載
- 未知 | 81602次下載 | 10 積分
- 7Keil工具M(jìn)DK-Arm免費(fèi)下載
- 0.02 MB | 73822次下載 | 10 積分
- 8LabVIEW 8.6下載
- 未知 | 65991次下載 | 10 積分
工商網(wǎng)監(jiān)
評(píng)論