针对CM32181数字光线传感芯片开发的Arduino驱动库
【背景】因工作需要单片机测试Capella Micro公司的CM32181数字环境光线传感器, 一块小PCBA。
此芯片为3.3V供电和3.3V I2C总线，支持polling和interrupt双模式操作。
此芯片在Arduino圈较少见，调试OK后顺便整成了一个Arduino驱动库上传到github上
方便大家使用。很希望以后能有更多的人为Arduino兼容丰富芯片做努力!
【驱动库github地址】
https://github.com/ShineHua2017/CM32181_arduino
【芯片Data Sheet地址】
http://www.ibselectronics.com/ibsstore/datasheet/CM32181A3OP.pdf
【调试环境】
UNO x 1
5V-3.3V IO电平转换板(需要SCL,SDA两路) x 1
4.7K电阻(SCL,SDA上拉用) x 2
芯片传感器PCBA的FFC接口转排针小板 x 1
【示例代码】
/* Arduino demo code for control Light Sensor chip -- CM32181
* Setup chip on polling mode and read Lux value
*
* The circuit:
* Ardunio CM32181
* SDA <---> SDA
* SCL <---> SCL
*
* library coding based on TWI library
*
* Written by Shine Hua
* Email Address: [email protected] [email protected]
*
*/
#include <CM32181_arduino.h>
//CM32181 ADDR pin pull high to select address 0x48
//or low to select address 0x10
CM32181 cm(0x10);//whenADDR pin connect GND
void setup() {
boolean error = false;
uint16_t chip_id = 0;
//uint16_t chip_status = 0;
Serial.begin(9600);
error = cm.init_chip();
if(error == false){
Serial.println("Not found chip device or init error!");
while(true)
{}
}
chip_id = cm.get_chip_ID();
if(chip_id != 0x81){ //chip ID must be 0x81
Serial.println("unknown chip!");
while(true)
{}
}
//chip_status = cm.get_chip_status();
//error = cm.powerdown_chip();
//error = cm.powerup_chip();
}
void loop() {
uint16_t get_data = cm.read_sensor_raw(); //This is sensor raw data, not lux value. you need trans.
String desc = "LUX raw data:";
desc += get_data;
Serial.println(desc);
delay(5);
}
【细节部分】
很好的实例，感谢分享
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