Question

我最近尝试使用免费下载版本的MikroC for dsPIC IDE进行编程，该版本是MAX44009传感器，可与PIC24FJ64GB002微控制器接口。传感器的照度结果应在LCD上显示。该代码编译没有失败，但是没有用。当我使用示波器查看SDA和SCL线时，它们始终保持高电平。但是如果我转换：

浮动亮度->整数亮度

和

FloatToStr（亮度，勒克斯）-> IntToString（亮度，勒克斯）

然后将代码加载到嵌入式设备上，示波器显示正在进行I2C通信，但是LCD显示的值未提供任何有价值的数据。勒克斯显示为-17204，它从不改变。

我试图在LCD上显示“指数”，它显示为：-17204 我试图在液晶显示屏上显示“尾数”，并显示：255

当我尝试调试代码时，将亮度声明为浮点数时，出现错误：“模拟错误：PC超出范围[0x0011F0]” 当我从float更改为int时；我可以调试代码，但是LCD上的输出值没有用。

//LCD module connections
sbit LCD_RS at LATB2_bit;
sbit LCD_EN at LATB3_bit;
sbit LCD_D4 at LATB5_bit;
sbit LCD_D5 at LATB7_bit;
sbit LCD_D6 at LATB13_bit;
sbit LCD_D7 at LATB14_bit;

sbit LCD_RS_Direction at TRISB2_bit;
sbit LCD_EN_Direction at TRISB3_bit;
sbit LCD_D4_Direction at TRISB5_bit;
sbit LCD_D5_Direction at TRISB7_bit;
sbit LCD_D6_Direction at TRISB13_bit;
sbit LCD_D7_Direction at TRISB14_bit;
//End LCD Module connections

//Global Constants
char txt1[] = "LUX:";
char txt2[] = "check";
//End Global Constants


// Global var.
unsigned int buff[2];
//unsigned char b1Index;
int mantissa;
int exponent;
float luminance;
char lux[16];
//end of Global variable declaration

//Function declaration
void MAX44009_getvalue();
//end of function declaration

void main(){
AD1PCFG = 0xffff;                        //Configure AN pins as digital 
I/O
Delay_ms(500);
I2C1_Init(100000);                       //Initialize I2C communication 
on SDA1 and SCL1
I2C1_Start();                  //Wake-up I2C components
I2C1_Write(0x96);              //Address MAX44009 lux sensor 
specifically, and prepare for write command
I2C1_Write(0x02);              //Address specific register 02 (interupt 
register) for MAX44009
I2C1_Write(0x40);              //Continuous mode, 100ms integration time
I2C1_Stop();                   //issue I2C stop signal
Delay_ms(300);                 //Because Arduino said so....

Lcd_Init();                              //Initialize LCD
Lcd_Cmd(_LCD_CLEAR);                     //Clear LCD
Lcd_Cmd(_LCD_CURSOR_OFF);                //Cursor Off

/*Delay_ms(1000);
Lcd_Out(2,1,txt2);
Delay_ms(1000);*/

while (1){
    MAX44009_getvalue();
    exponent = (buff[0] & 0xF0) >> 4;
    mantissa = ((buff[0] & 0x0F ) << 4) | (buff[1] & 0x0F);
    luminance = pow(2, exponent)*mantissa*0.045;

    FloatToStr(luminance, lux);

    Lcd_Out(1,1,txt1);
    Lcd_Out(2,1,lux);
    Delay_ms(500);
}
}

void MAX44009_getvalue(){

I2C1_Start();
I2C1_Write(0x96);
I2C1_Write(0x03);             //MAX44009 LUX High-Byte Register 0x03
I2C1_Restart();
I2C1_Write(0x97);

buff[0] = I2C1_Read(0);

I2C1_Restart();

I2C1_Write(0x96);
I2C1_Write(0x04);              //MAX44009 LUX Low-Byte Register 0x04
I2C1_Restart();
I2C1_Write(0x97);

buff[1] = I2C1_Read(0);

I2C1_Stop();
}

预期结果：MAX44009照度传感器代码有效，在LCD上显示照度值

模拟错误：PC不在[0x0011F0]范围内

您是否曾经将MAX44009传感器与uC相连？

0 个答案: