Paul Staron
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
Revision 2:893e9004c547, committed 2015-05-23
- Comitter:
- star297
- Date:
- Sat May 23 14:48:15 2015 +0000
- Parent:
- 1:2bca6370ae45
- Child:
- 3:1220287bcbd7
- Commit message:
- V1.0
Changed in this revision
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/EFM32_CapSense.lib Sat May 23 14:48:15 2015 +0000 @@ -0,0 +1,1 @@ +https://developer.mbed.org/teams/SiliconLabs/code/EFM32_CapSenseSlider/#8d096e5bc045
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/EFM32_SegmentLCD.lib Sat May 23 14:48:15 2015 +0000 @@ -0,0 +1,1 @@ +http://developer.mbed.org/teams/SiliconLabs/code/EFM32_SegmentLCD/#114aa75da77b
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/RDA5807M.lib Sat May 23 14:48:15 2015 +0000 @@ -0,0 +1,1 @@ +http://developer.mbed.org/users/star297/code/RDA5807M/#cf256181972f
--- 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
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed-src.lib Sat May 23 14:48:15 2015 +0000 @@ -0,0 +1,1 @@ +http://developer.mbed.org/users/mbed_official/code/mbed-src/#7f313a59e20c
--- a/mbed.lib Wed Apr 29 07:33:32 2015 -0700 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,1 +0,0 @@ -http://developer.mbed.org/users/mbed_official/code/mbed-src/#8bb0742e5907 \ No newline at end of file