Loop Infinite
Where I try playing a sample via PwmOutput
Reading some old ZX Spectrum forums, I wanted to check wether playing a sample was possible. So far, no, but there's more things to try.
Diff: main.cpp
- Revision:
- 0:167d81d4f79f
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Sun Mar 08 21:51:59 2015 +0000
@@ -0,0 +1,95 @@
+#include "mbed.h"
+#include "sound.h"
+#include "LCD_ST7735.h"
+#include "font_IBM.h"
+//#include "Sequencer.h"
+
+//int main() {
+// Sequencer seq;
+// while (true) {
+// wait(10.0f);
+ // seq.play();
+// }
+
+Ticker flipper;
+LCD_ST7735 disp(P0_19, P0_20, P0_7, P0_21, P0_22, P1_15, P0_2, LCD_ST7735::RGB);
+// led1(P0_9), led2(P0_8), pwm(P0_18)
+PwmOut pwm(P0_18);
+DigitalOut led1(P0_9);
+DigitalOut led2(P0_8);
+InterruptIn left(P0_14);
+InterruptIn right(P0_11);
+InterruptIn up(P0_13);
+InterruptIn down(P0_12);
+
+double srate = 1.0f/2000.0f;
+double pwmrate = 1.0f/80000.0f;
+unsigned short int idx = 0;
+
+void printDouble(int y, double value) {
+ char buffer[10];
+ int len = sprintf(buffer, "%.1f", value);
+ disp.drawString(font_ibm, 0, y, buffer);
+}
+void pnext() {
+ pwm = (pcm_samples[idx++] / 255.0f);
+ if (idx == pcm_length) {
+ idx = 0;
+ led2 = !led2;
+ }
+}
+
+void setpwm() {
+ led1 = !led1;
+ printDouble(10, 1.0f/pwmrate);
+ pwm.period(pwmrate);
+}
+void setsrate() {
+ flipper.detach();
+ led2 = !led2;
+ printDouble(0, 1.0f/srate);
+ flipper.attach(&pnext, srate); // setup flipper to call flip after 2 seconds
+}
+void incf() {
+ srate *= 1.1f;
+ setsrate();
+}
+void decf() {
+ srate /= 1.1f;
+ setsrate();
+}
+void incpwm() {
+ pwmrate *= 1.1f;
+ setpwm();
+}
+void decpwm() {
+ pwmrate /= 1.1f;
+ setpwm();
+}
+int main() {
+ led2 = 1;
+ pwm.period(pwmrate);
+ left.mode(PullUp);
+ right.mode(PullUp);
+ up.mode(PullUp);
+ down.mode(PullUp);
+
+ right.rise(&incpwm);
+ left.rise(&decpwm);
+ up.rise(&incf);
+ down.rise(&decf);
+
+ disp.setOrientation(LCD_ST7735::Rotate270, false);
+ disp.clearScreen();
+ printDouble(0 , 1.0f/srate);
+ printDouble(10, 1.0f/pwmrate);
+
+ flipper.attach(&pnext, srate); // setup flipper to call flip after 2 seconds
+ led1 = 1;
+
+ while(1) {
+ // Watchdog. Have I crashed?
+ wait(10.0f);
+ led1 = !led1;
+ }
+}