Diff: main.cpp

Revision:

2:893e9004c547

Parent:

0:b0927d62ef70

Child:

3:1220287bcbd7

--- a/main.cpp	Wed Apr 29 07:33:32 2015 -0700
+++ b/main.cpp	Sat May 23 14:48:15 2015 +0000
@@ -1,15 +1,173 @@
+/*
+RDA5807M FM RDS Radio using the EFM32 Gecko Segment LCD
+RDS information is displayed using a PC terminal
+
+Use:
+switches PB0 and PB1 for frequency search
+Volume controlled by the Touch Slider
+Indicators: 
+Signal level - Ring Segement Display
+Stereo received - Antenna Segment Display
+RDS available - LED0
+*/
+
 #include "mbed.h"
+#include "RDA5807M.h"
+#include "EFM32_SegmentLCD.h"
+#include "EFM32_CapSenseSlider.h"
+
+ 
+RDA5807M radio(PC4, PC5);   // sda - scl
+
+Serial pc(USBTX, USBRX);
+
+InterruptIn scan_up(SW1);
+InterruptIn scan_down(SW0); 
+
+DigitalOut led1(LED1);
+DigitalOut led0(LED0);
+
+silabs::EFM32_SegmentLCD segmentDisplay;
+silabs::EFM32_CapSenseSlider capSlider;
+
+Timer t1;
  
-DigitalOut myled(LED1);
-LowPowerTicker toggleTicker;
+int n,i,l,signal,lastsignal,volume,lastrds,laststereo,rdstextgood;
+float lastfreq;
+char Station[10],lastStationName[10],vol[4];
+char RDStxt[70],RDStxt1[70],RDStxt2[70],text1[50],lasttext1[50],text2[50],lasttext2[50];
+
+void displayrefresh(),getrds();
+
+void scan_upIRQ() {
+    radio.SeekUp(); 
+}  
+
+void scan_downIRQ() {
+    radio.SeekDown();    
+}
 
-void ledToggler(void) {
-    myled = !myled;
+void slideCallback(void) {
+    volume = capSlider.get_position()/3;        
+    if(volume > 15){volume = 15;}
+    if(volume < 0){volume = 0;}  
+    radio.Volume(volume);
+    sprintf(vol,"Vol %d", volume);
+    segmentDisplay.Write(vol);
+    t1.reset();t1.start();  
+}  
+ 
+int main() { 
+
+    radio.Reset();      // reset and power up radio chip 
+    segmentDisplay.Write("RdA5807");
+    wait(1); 
+    segmentDisplay.Write("RDS FM");
+    wait(1);
+    segmentDisplay.Write("Radio");    
+    capSlider.start();
+    capSlider.attach_slide(-1, slideCallback);   
+    scan_up.fall(scan_upIRQ);     
+    scan_down.rise(scan_downIRQ); 
+    wait(1);     
+    
+    while(1){    
+        radio.processData();
+        displayrefresh();
+        getrds();              
+        wait_ms(50);
+        if(t1.read()>3){strcpy(lastStationName," ");t1.stop();}        
+    }
 }
+
+void displayrefresh()
+{   
+    if (strcmp(lastStationName, radio.StationName) != 0){
+        if(strlen(radio.StationName)<9){
+            n=0;for(i=0;i<(8);i++){ // remove non-printable ASCCi error characters               
+                if(radio.StationName[i] > 31){          
+                    Station[n] = radio.StationName[i];         
+                    n++;
+                    }
+                }              
+            segmentDisplay.Write(Station);
+            strcpy(lastStationName,radio.StationName);
+            }
+        }    
+    if(lastfreq != radio.freq/1000){lastfreq = radio.freq/1000;
+        if(radio.freq<100000){            
+            segmentDisplay.Number(radio.freq/10);segmentDisplay.Symbol(LCD_SYMBOL_DP10,1);
+            }
+            else {segmentDisplay.Number(radio.freq/100);segmentDisplay.Symbol(LCD_SYMBOL_DP10,0);}
+        rdstextgood=0;lastrds=!lastrds;
+        }
+    if(laststereo != radio.stereo){
+        if(radio.stereo){segmentDisplay.Symbol(LCD_SYMBOL_ANT,1);}
+            else{segmentDisplay.Symbol(LCD_SYMBOL_ANT,0);}
+        laststereo = radio.stereo;
+        }        
+    if(lastsignal != radio.signal){
+        signal=radio.signal;
+        for (i = 0; i < 8; i++)
+            {segmentDisplay.ARing(i, 0);}    
+        if(signal>4){segmentDisplay.ARing(0, 1);}
+        if(signal>9){segmentDisplay.ARing(1, 1);}
+        if(signal>14){segmentDisplay.ARing(2, 1);}
+        if(signal>19){segmentDisplay.ARing(3, 1);}
+        if(signal>25){segmentDisplay.ARing(4, 1);}
+        if(signal>30){segmentDisplay.ARing(5, 1);}
+        if(signal>35){segmentDisplay.ARing(6, 1);}
+        if(signal>40){segmentDisplay.ARing(7, 1);}        
+        lastsignal=radio.signal;       
+        }
+    if(lastrds != radio.rds){
+        if(radio.rds){
+            if(rdstextgood){led0=1;}
+                else{led0=0;}
+                }
+            else{led0=0;rdstextgood=0;}               
+        lastrds=radio.rds;
+        }                          
+    if (strcmp(text1, lasttext1) != 0){        
+        pc.printf(Station);
+        pc.printf("\n %s\n",text1);
+        memset(lasttext1, '\0', sizeof(lasttext1));strcpy(lasttext1, text1);}
+    if (strcmp(text2, lasttext2) != 0){
+        pc.printf(" %s\n\n",text2);
+        memset(lasttext2, '\0', sizeof(lasttext2));strcpy(lasttext2, text2);}    
+}       
+
+void getrds()
+{    
+    if(strlen(radio.RDSText)==64 && signal>23){               
+        memset(text1, '\0', sizeof(text1));
+        memset(text2, '\0', sizeof(text2));
+        if(!rdstextgood){rdstextgood=1;lastrds=!lastrds;}        
+    // remove non-printable ASCCi error characters        
+        n=0;
+        for(i=0;i<(64);i++){                
+            if(radio.RDSText[i] > 31){          
+                RDStxt[n] = radio.RDSText[i];         
+                n++;
+            }
+        }                              
+    // slit into 2 lines of text seperated by 'space'
+        strcpy(RDStxt1,RDStxt);    
+        for ( i = 0; i < (n); i++ ){
+            if (i>30 && (RDStxt1[i] == ' ') ){              
+                RDStxt1 [strlen(RDStxt1) - (n-i)] = '\0';               
+                l=strlen(RDStxt1);
+                i=n;
+            } }                 
+        strcpy (RDStxt2, RDStxt + l);
+        while(RDStxt2[0]==' '){
+            strcpy (RDStxt2, (RDStxt2 + 1));
+            }
+        if(strlen(RDStxt1)<40){strcpy (text1, RDStxt1);}
+        if(strlen(RDStxt2)<40){strcpy (text2, RDStxt2);}
+        
+        memset(radio.RDSText, '\0', sizeof(radio.RDSText));      
+    }
+}
+
  
-int main() {
-    toggleTicker.attach(&ledToggler, 0.2f);
-    while(1) {
-        sleep();
-    }
-}
\ No newline at end of file