John Larkin
Test program for the Adafruit Si4713 FM transmitter
Dependencies: Adafruit_Si4713 mbed
Revision 0:9cf641b3b681, committed 2017-01-24
- Comitter:
- JLarkin
- Date:
- Tue Jan 24 06:56:34 2017 +0000
- Child:
- 1:cad29d4fbce9
- Commit message:
- A demonstration program for the Adafruit FM transmitter. Plays a PWM song over LIN. Disconnect and use audio jack if you have better music.
Changed in this revision
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/Adafruit_Si4713.lib Tue Jan 24 06:56:34 2017 +0000 @@ -0,0 +1,1 @@ +Adafruit_Si4713#6643c5542090
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Tue Jan 24 06:56:34 2017 +0000
@@ -0,0 +1,49 @@
+#include "mbed.h"
+#include "Adafruit_Si4713.h"
+
+/* For the demo use PWM (p25) connected to LIN to play... */
+PwmOut muzak(p25);
+float frequency[]={659, 554, 659, 554, 440, 494, 554, 587, 494, 659, 554, 440};
+float beat[]={1,1,1,1,1,0.5,0.5,1,1,1,1,2};
+
+uint16_t fmstation = 9350; // 9350 == 93.5 MHz
+
+I2C myi2c(p9,p10);
+Adafruit_Si4713 radio = Adafruit_Si4713(myi2c, p5, 0x63<<1);
+
+int main() {
+ printf("Adafruit Radio - Si4713 Test\r\n");
+
+ if (! radio.begin()) {
+ printf("Couldn't find radio?\r\n");
+ while (1);
+ }
+
+ // Uncomment to scan power of entire range from 87.5 to 108.0 MHz
+ for (uint16_t f = 8750; f<10800; f+=10) {
+ radio.readTuneMeasure(f);
+ printf("Measuring %.1f\t",f/100.0);
+ radio.readTuneStatus();
+ printf("%i\r\n",radio.currNoiseLevel);
+ }
+
+ printf("\n\rSet TX power");
+ radio.setTXpower(115); // dBuV, 88-115 max
+
+ printf("\n\rTuning into %.1f\r\n",fmstation/100.0);
+ radio.tuneFM(fmstation);
+
+ // This will tell you the status in case you want to read it from the chip
+ radio.readTuneStatus();
+ printf("\tCurr freq: %d\r\n", radio.currFreq);
+ printf("\tCurr freqdBuV: %d\r\n", radio.currdBuV);
+ printf("\tCurr ANTcap: %d\r\n", radio.currAntCap);
+
+ while (1) {
+ for (int i = 0; i<=11; i++) {
+ muzak.period(1/(2*frequency[i]));
+ muzak = 0.5;
+ wait(0.4*beat[i]);
+ }
+ }
+}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Tue Jan 24 06:56:34 2017 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/ad3be0349dc5 \ No newline at end of file