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
main.cpp
- Committer:
- star297
- Date:
- 2015-06-19
- Revision:
- 4:3bf9d70a48c8
- Parent:
- 3:1220287bcbd7
File content as of revision 4:3bf9d70a48c8:
/* 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; LowPowerTimeout wakeup; Timer t1; 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(),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;} 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(); 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){ 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); pc.printf("Station:\n%s\n\n",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);} led0=0; } 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(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); pc.printf("%s\n\n",RDStxt2); pc.printf("Time: %s\n",radio.CTtime); memset(lasttext1, '\0', sizeof(lasttext1));strcpy(lasttext1, RDStxt1); memset(lasttext2, '\0', sizeof(lasttext2));strcpy(lasttext2, RDStxt2); led0=1; } void getrds() { if(strlen(radio.RDSText)>3){ memset(RDStxt1, '\0', sizeof(RDStxt1)); memset(RDStxt2, '\0', sizeof(RDStxt2)); // format into 2 lines of text seperated by first 'space' after 30 characters strcpy(RDStxt1,radio.RDSText); n=strlen(RDStxt1); for ( i = 0; i < (n); i++ ){ if (i>30 && (RDStxt1[i] == ' ') ){ RDStxt1 [strlen(RDStxt1) - (n-i)] = '\0'; l=strlen(RDStxt1); x=1; break; // break if more than 30 characters with space } if(i>39){ RDStxt1 [strlen(RDStxt1) - (n-i)] = '\0'; l=strlen(RDStxt1); x=1; break; //break if more than 39 characters with no spaces } } if(x==1){ strcpy (RDStxt2, radio.RDSText + l); while(RDStxt2[0]==' '){ strcpy (RDStxt2, (RDStxt2 + 1)); } x=0; } } }