Diff: main.cpp

Revision:

0:205c27289cf4

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Fri Dec 05 02:34:45 2014 +0000
@@ -0,0 +1,78 @@
+#include "mbed.h"
+#include "SDFileSystem.h"
+#include "wave_player.h"
+ 
+SPI spi(p11, p12, p13); // mosi(out), miso(in), sclk(clock)
+DigitalOut cs(p14); // cs (the chip select signal)
+Serial pc(USBTX, USBRX); // tx, rx ( the usb serial communication )
+
+SDFileSystem sd(p5, p6, p7, p8, "sd");
+PwmOut PWMout(p21);
+AnalogOut DACout(p18);
+AnalogIn fsr(p15);
+wave_player waver(&DACout,&PWMout);
+FILE *wave_file;
+ 
+int main() {
+    // Setup the spi for 7 bit data, high steady state clock,
+    // second edge capture, with a 1MHz clock rate
+    spi.format(7,0);
+    spi.frequency(1000000);
+    
+    // Set PWMout period
+    PWMout.period(1.0/400000.0);
+ 
+    // notify the user that we are starting with the ADC communication
+    pc.printf("Starting ADC interaction\n\n\n");
+    
+    // lets just do this forever
+    while (1) {
+ 
+        for (int i = 0 ; i < 2; i++){
+            // Select the device by seting chip select low
+            cs = 0;
+            
+            // sending the 6 bits + 1 bit to ignore the null bit
+            // coming from the device, so the data that is sent is 1100000
+            spi.write(0x60 + (i*4));
+            
+            // now the device sends back the readings 12 bits, 7 bits at a time
+            uint8_t high = spi.write(0x00);
+            uint8_t low = spi.write(0x00);
+     
+            // shift out the right bits
+            low = ( high << 5 ) | (low >> 2);
+            high = high >> 3;
+            
+            // shift and or the result together
+            int value = ( high << 8 ) | low;
+            
+            // and voila we have the value and we can print it for the user
+            //pc.printf("sensor %d value = %u\n", i, value);
+            switch (i){
+                case 0:
+                    if (value > 200) {
+                        pc.printf("\tX\r");
+                        wave_file=fopen("/sd/highhat.wav","r");
+                        waver.play(wave_file);
+                        fclose(wave_file);
+                    }
+                    break;
+                case 1:
+                    if (value > 200){
+                        pc.printf("\t\t\t\tX\r");
+                        wave_file=fopen("/sd/snare.wav","r");
+                        waver.play(wave_file);
+                        fclose(wave_file);
+                    }
+                    break;
+            }
+            
+            // Deselect the device
+            cs = 1;
+        }
+ 
+        // delay some time before reading again
+        wait_us(100);
+    }
+}
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