Kimberly Lie / Mbed 2 deprecated ECE4180_MasterCode

ECE 4180 Project for Spring 2020

Dependencies:   mbed mbed-rtos SDFileSystem PinDetect ESP8266NodeMCUInterface

wave_player/wave_player.h@1:5ae291085f75, 2020-05-01 (annotated)

Committer:
kimberlylie99
Date:
Fri May 01 18:43:13 2020 +0000
Revision:
1:5ae291085f75
Parent:
0:b97c07227845 
Edit Main.cpp;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
kimberlylie99 0:b97c07227845 1 #include <mbed.h>
kimberlylie99 0:b97c07227845 2
kimberlylie99 0:b97c07227845 3 typedef struct uFMT_STRUCT {
kimberlylie99 0:b97c07227845 4 short comp_code;
kimberlylie99 0:b97c07227845 5 short num_channels;
kimberlylie99 0:b97c07227845 6 unsigned sample_rate;
kimberlylie99 0:b97c07227845 7 unsigned avg_Bps;
kimberlylie99 0:b97c07227845 8 short block_align;
kimberlylie99 0:b97c07227845 9 short sig_bps;
kimberlylie99 0:b97c07227845 10 } FMT_STRUCT;
kimberlylie99 0:b97c07227845 11
kimberlylie99 0:b97c07227845 12
kimberlylie99 0:b97c07227845 13 /** wave file player class.
kimberlylie99 0:b97c07227845 14 *
kimberlylie99 0:b97c07227845 15 * Example:
kimberlylie99 0:b97c07227845 16 * @code
kimberlylie99 0:b97c07227845 17 * #include <mbed.h>
kimberlylie99 0:b97c07227845 18 * #include <wave_player.h>
kimberlylie99 0:b97c07227845 19 *
kimberlylie99 0:b97c07227845 20 * AnalogOut DACout(p18);
kimberlylie99 0:b97c07227845 21 * wave_player waver(&DACout);
kimberlylie99 0:b97c07227845 22 *
kimberlylie99 0:b97c07227845 23 * int main() {
kimberlylie99 0:b97c07227845 24 * FILE *wave_file;
kimberlylie99 0:b97c07227845 25 *
kimberlylie99 0:b97c07227845 26 * printf("\n\n\nHello, wave world!\n");
kimberlylie99 0:b97c07227845 27 * wave_file=fopen("/sd/44_8_st.wav","r");
kimberlylie99 0:b97c07227845 28 * waver.play(wave_file);
kimberlylie99 0:b97c07227845 29 * fclose(wave_file);
kimberlylie99 0:b97c07227845 30 * }
kimberlylie99 0:b97c07227845 31 * @endcode
kimberlylie99 0:b97c07227845 32 */
kimberlylie99 0:b97c07227845 33 class wave_player {
kimberlylie99 0:b97c07227845 34
kimberlylie99 0:b97c07227845 35 public:
kimberlylie99 0:b97c07227845 36 /** Create a wave player using a pointer to the given AnalogOut object.
kimberlylie99 0:b97c07227845 37 *
kimberlylie99 0:b97c07227845 38 * @param _dac pointer to an AnalogOut object to which the samples are sent.
kimberlylie99 0:b97c07227845 39 */
kimberlylie99 0:b97c07227845 40 wave_player(AnalogOut *_dac);
kimberlylie99 0:b97c07227845 41
kimberlylie99 0:b97c07227845 42 /** the player function.
kimberlylie99 0:b97c07227845 43 *
kimberlylie99 0:b97c07227845 44 * @param wavefile A pointer to an opened wave file
kimberlylie99 0:b97c07227845 45 */
kimberlylie99 0:b97c07227845 46 void play(FILE *wavefile);
kimberlylie99 0:b97c07227845 47
kimberlylie99 0:b97c07227845 48 /** Set the printf verbosity of the wave player. A nonzero verbosity level
kimberlylie99 0:b97c07227845 49 * will put wave_player in a mode where the complete contents of the wave
kimberlylie99 0:b97c07227845 50 * file are echoed to the screen, including header values, and including
kimberlylie99 0:b97c07227845 51 * all of the sample values placed into the DAC FIFO, and the sample values
kimberlylie99 0:b97c07227845 52 * removed from the DAC FIFO by the ISR. The sample output frequency is
kimberlylie99 0:b97c07227845 53 * fixed at 2 Hz in this mode, so it's all very slow and the DAC output isn't
kimberlylie99 0:b97c07227845 54 * very useful, but it lets you see what's going on and may help for debugging
kimberlylie99 0:b97c07227845 55 * wave files that don't play correctly.
kimberlylie99 0:b97c07227845 56 *
kimberlylie99 0:b97c07227845 57 * @param v the verbosity level
kimberlylie99 0:b97c07227845 58 */
kimberlylie99 0:b97c07227845 59 void set_verbosity(int v);
kimberlylie99 0:b97c07227845 60
kimberlylie99 0:b97c07227845 61 private:
kimberlylie99 0:b97c07227845 62 void dac_out(void);
kimberlylie99 0:b97c07227845 63 int verbosity;
kimberlylie99 0:b97c07227845 64 AnalogOut *wave_DAC;
kimberlylie99 0:b97c07227845 65 Ticker tick;
kimberlylie99 0:b97c07227845 66 unsigned short DAC_fifo[256];
kimberlylie99 0:b97c07227845 67 short DAC_wptr;
kimberlylie99 0:b97c07227845 68 volatile short DAC_rptr;
kimberlylie99 0:b97c07227845 69 short DAC_on;
kimberlylie99 0:b97c07227845 70 };
kimberlylie99 0:b97c07227845 71
kimberlylie99 0:b97c07227845 72