Paul Staron / EFM32 RDA5807M RDS Radio

RDA5807M FM RDS radio using the Gecko Segment LCD display. PC serial is used to display the RDS text on a pc terminal program if required (115200 baud). The two press buttons to tune up or down, touch slider to change volume. Top numeric displays frequency, bottom alpha displays station name. Ring segment displays signal level, antenna segment indicates stereo received.

Dependencies:   EFM32_CapSenseSlider EFM32_SegmentLCD RDA5807M mbed-src

Files at this revision

API Documentation at this revision

Revision 4:3bf9d70a48c8, committed 2015-06-19

Comitter:
star297
Date:
Fri Jun 19 19:24:01 2015 +0000
Parent:
3:1220287bcbd7
Commit message:
RDS text update

Changed in this revision

main.cpp Show annotated file Show diff for this revision Revisions of this file 
diff -r 1220287bcbd7 -r 3bf9d70a48c8 main.cpp
--- a/main.cpp	Fri Jun 19 16:38:34 2015 +0000
+++ b/main.cpp	Fri Jun 19 19:24:01 2015 +0000
@@ -1,7 +1,7 @@
 /*
 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
@@ -10,43 +10,48 @@
 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;
-
+LowPowerTimeout wakeup;
+ 
 Timer t1;
  
-int x,n,i,l,signal,lastsignal,volume,laststereo;
+int x,n,i,l,wake,signal,lastsignal,volume,laststereo;
 float lastfreq;
 char Station[10],lastStationName[10],vol[4],lastCT[12];
 char RDStxt[70],RDStxt1[70],RDStxt2[70],text1[70],lasttext1[70],text2[70],lasttext2[70];
-
-void displayrefresh(),getrds();
-
+ 
+void displayrefresh(),getrds(),RTrefresh();
+ 
 void scan_upIRQ() {
     radio.SeekUp(); 
 }  
-
+ 
 void scan_downIRQ() {
     radio.SeekDown();    
 }
 
+void callback(void) {
+    wake = 1;
+}
+ 
 void slideCallback(void) {
     volume = capSlider.get_position()/3;        
     if(volume > 15){volume = 15;}
@@ -58,7 +63,7 @@
 }  
  
 int main() { 
-
+ 
     radio.Reset();      // reset and power up radio chip 
     segmentDisplay.Write("RdA5807");
     wait(1); 
@@ -74,12 +79,15 @@
     while(1){    
         radio.ProcessData();
         displayrefresh();
-        getrds();              
-        wait_ms(50);
-        if(t1.read()>3){strcpy(lastStationName," ");t1.stop();}        
+        getrds();
+        if(t1.read()>3){strcpy(lastStationName," ");t1.stop();} 
+        wait_ms(1);
+        wakeup.attach(callback, 0.05f);  // MCU average power now 1mA
+        wake = 0;
+        while(!wake) sleep();        
     }
 }
-
+ 
 void displayrefresh()
 {   
     if (strcmp(lastStationName, radio.StationName) != 0){
@@ -122,6 +130,17 @@
         lastsignal=radio.signal;       
         }
     if(strcmp(RDStxt1, lasttext1) != 0 || strcmp(RDStxt2, lasttext2) != 0){
+        RTrefresh();
+        }
+    if(strcmp(lastCT, radio.CTtime) !=0){    
+        pc.printf("Time: %s\n",radio.CTtime);
+        strcpy(lastCT,radio.CTtime);
+        if(led0==1){RTrefresh();}
+        }       
+}
+
+void RTrefresh()
+{
         pc.printf("\n-------------------------------------------\n");
         pc.printf("Station:\n%s\n\n",Station);
         pc.printf("RT:\n%s\n",RDStxt1);
@@ -130,13 +149,8 @@
         memset(lasttext1, '\0', sizeof(lasttext1));strcpy(lasttext1, RDStxt1);           
         memset(lasttext2, '\0', sizeof(lasttext2));strcpy(lasttext2, RDStxt2); 
         led0=1;
-        }
-    if(strcmp(lastCT, radio.CTtime) !=0){    
-        pc.printf("Time: %s\n",radio.CTtime);
-        strcpy(lastCT,radio.CTtime);
-        }       
-}       
-
+}        
+ 
 void getrds()
 {    
    if(strlen(radio.RDSText)>3){               
@@ -168,6 +182,4 @@
             x=0;
         }
     }   
-}
-
- 
+}
\ No newline at end of file