Noduino I2C Scan
来自Jack's Lab
(版本间的差异)
(→代码示例) |
(→硬件准备) |
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第12行: | 第12行: | ||
== 硬件准备 == | == 硬件准备 == | ||
− | + | 此传感器为 I2C 接口,Falcon 接线方式如下: | |
− | * | + | * Sensor_SCL --> Noduino_Falcon_D9 |
− | * | + | * Sensor_SDA --> Noduino_Falcon_D8 |
− | |||
+ | * Sensor_3V3 --> Noduino_Falcon_3V3 | ||
+ | * Sensor_GND --> Noduino_Falcon_GND | ||
− | |||
+ | NodeC / SmartNode 接线方式如下: | ||
+ | * Sensor_SCL --> SmartNode_IO5 | ||
+ | * Sensor_SDA --> SmartNode_IO4 | ||
+ | |||
+ | |||
+ | * Sensor_3V3 --> SmartNode_3V3 | ||
+ | * Sensor_GND --> SmartNode_GND | ||
<br><br> | <br><br> |
2016年11月14日 (一) 10:30的最后版本
目录 |
[编辑] 1 开发环境准备
根据您的系统,选择如下快速指南:
- Getting Started with Noduino SDK on Linux
- Getting Started with Noduino SDK on Mac OS X
- Getting Started with Noduino SDK on Windows
[编辑] 2 硬件准备
此传感器为 I2C 接口,Falcon 接线方式如下:
- Sensor_SCL --> Noduino_Falcon_D9
- Sensor_SDA --> Noduino_Falcon_D8
- Sensor_3V3 --> Noduino_Falcon_3V3
- Sensor_GND --> Noduino_Falcon_GND
NodeC / SmartNode 接线方式如下:
- Sensor_SCL --> SmartNode_IO5
- Sensor_SDA --> SmartNode_IO4
- Sensor_3V3 --> SmartNode_3V3
- Sensor_GND --> SmartNode_GND
[编辑] 3 编译烧写
进入你的 i2c-scan 目录:
$ cd /PATH/TO/noduino-sdk/examples/noduino/i2c-scan
编译、上传一步完成:
$ make flash
不同平台下,你的串口设备号可能不一样,确认一下你的串口设备,Linux 下 Falcon 开发板可能被识别为 /dev/ttyUSB1(dmesg 查看),则:
$ make flash ESPPORT=/dev/ttyUSB1
Windows 下 Falcon 开发板可能被识别为 COM6(控制面板 --> 设备管理器里查看),则:
$ make flash ESPPORT=COM6
[编辑] 4 查看结果
上传完之后,用串口工具,用 115200 的波特率打开串口,即可看到串口在持续输出传感器测得的值:
Windows 下可用串口调试助手这类插看
Linux 下推荐使用 picocom:
$ sudo apt-get install picocom $ picocom -b 115200 /dev/ttyUSB1 picocom v1.7 port is : /dev/ttyUSB2 flowcontrol : none baudrate is : 115200 parity is : none databits are : 8 escape is : C-a local echo is : no noinit is : no noreset is : no nolock is : no send_cmd is : sz -vv receive_cmd is : rz -vv imap is : omap is : emap is : crcrlf,delbs, Terminal ready ...... ......
Ctrl + a q 退出 picocom
[编辑] 5 代码示例
#include "noduino.h" void setup() { serial_begin(115200); wire_begin(); } void loop() { byte error, address; int nDevices; serial_printf("I2C Scanning...\r\n"); nDevices = 0; for (address = 1; address < 127; address++) { // The i2c_scanner uses the return value of // the wire_endTransmisstion to see if // a device did acknowledge to the address. wire_beginTransmission(address); error = wire_endTransmission(); if (error == 0) { serial_printf("I2C device found at address 0x%02X\r\n", address); nDevices++; } else if (error == 4) { serial_printf("Unknow error at address 0x%02X\r\n", address); } } if (nDevices == 0) serial_printf("No I2C devices found\r\n"); else serial_printf("done\r\n"); delay(25*1000); }
[编辑] 6 扩展阅读
- 更多问题参考: