Lucy Lenhardt
See commit words
Dependencies: SDFileSystem_high_spi_freq mbed wave_player_pwm_and_dac
Revision 0:205c27289cf4, committed 2014-12-05
- Comitter:
- lenhardt
- Date:
- Fri Dec 05 02:34:45 2014 +0000
- Commit message:
- This is Wheel Beats working with ADC, playing through PWMout for a ; headphone/speaker audio jack when you hit the force sensitive resistor squares. Oh, and it reads it off an SD card at an spi frequency of 25MHz.
Changed in this revision
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/SDFileSystem.lib Fri Dec 05 02:34:45 2014 +0000 @@ -0,0 +1,1 @@ +http://developer.mbed.org/users/lenhardt/code/SDFileSystem_high_spi_freq/#a3fe24740f94
--- /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);
+ }
+}
\ No newline at end of file
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Fri Dec 05 02:34:45 2014 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/4fc01daae5a5 \ No newline at end of file
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/wave_player.lib Fri Dec 05 02:34:45 2014 +0000 @@ -0,0 +1,1 @@ +http://developer.mbed.org/users/lenhardt/code/wave_player_pwm_and_dac/#da5d90e12f27