کد:
/**
/*
* #
* # Example code for I2C FM TRANSMITTER MODULE
* # Company : AftabRayaneh
* # Website : http://shop.aftabrayaneh.com
* # Editor : mohammad omidvar - max
* # Date : 30.10.2013
* # Version : 1.0
*
* For this demo, input command format like &xxxx to set select band,
* (eg:if you want to set FM 95.6MHz,then input &0956 and send).
*
*/
#include <FMTX.h>
float fm_freq = 90; // Here set the default FM frequency
void setup(void)
{
Serial.begin(9600);
Serial.print("FM-TX Demo\r\n");
/**
* Initial, set FM channel and select your area:
* USA
* EUROPE
* JAPAN
* AUSTRALIA
* CHINA
*/
fmtx_init(fm_freq, USA);
Serial.print("Channel:");
Serial.print(fm_freq, 1);
Serial.println("MHz");
}
void loop(void)
{
/** check for data setting new frequency. Users could input data from Serial monitor. Data
* must start with '&' and followed by 4 numbers, such as &8000. The first two is the integer part
* of new frequency (Unit: MHz), and the last one is the decimal part. And the channel must between 70MHz
* and 108Mhz. For example, &756 is 75.6MHz, and &666 is out of range.
*/
if(Serial.available()){
switch(Serial.read()){
case '&':
u8 i,buf[4];
float ch;
i=0;
delay(30);
while(Serial.available()&&i<4){
buf[i]=Serial.read();
if (buf[i]<= '9' && buf[i]>= '0') {
i++;
}
else{
i=0;
break;
}
}
if (i==4){
ch = (buf[0]-'0')*100+(buf[1]-'0')*10+(buf[2]-'0')*1+0.1*(buf[3]-'0');
if(ch>=70&&ch<=108){
Serial.print("New Channel:");
Serial.print(ch, 1);
Serial.println("MHz");
fmtx_set_freq(ch);
}
else{
Serial.println("ERROR:Channel must be range from 70Mhz to 108Mhz.");
}
}
else{
Serial.println("ERROR:Input Format Error.");
}
while(Serial.available()){
Serial.read();
}
break;
}
}
}
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