Dylan Frausto / Mbed 2 deprecated mberdl_shell_rev_b

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Dependencies:   mbed 4DGL-uLCD-SE MMA8452

wave_player/wave_player.h@0:8e3b9bb1084a, 2022-03-10 (annotated)

Committer:
lballard9
Date:
Thu Mar 10 05:18:13 2022 +0000
Revision:
0:8e3b9bb1084a
shell rev b;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
lballard9 0:8e3b9bb1084a 1 #include <mbed.h>
lballard9 0:8e3b9bb1084a 2
lballard9 0:8e3b9bb1084a 3 typedef struct uFMT_STRUCT {
lballard9 0:8e3b9bb1084a 4 short comp_code;
lballard9 0:8e3b9bb1084a 5 short num_channels;
lballard9 0:8e3b9bb1084a 6 unsigned sample_rate;
lballard9 0:8e3b9bb1084a 7 unsigned avg_Bps;
lballard9 0:8e3b9bb1084a 8 short block_align;
lballard9 0:8e3b9bb1084a 9 short sig_bps;
lballard9 0:8e3b9bb1084a 10 } FMT_STRUCT;
lballard9 0:8e3b9bb1084a 11
lballard9 0:8e3b9bb1084a 12
lballard9 0:8e3b9bb1084a 13 /** wave file player class.
lballard9 0:8e3b9bb1084a 14 *
lballard9 0:8e3b9bb1084a 15 * Example:
lballard9 0:8e3b9bb1084a 16 * @code
lballard9 0:8e3b9bb1084a 17 * #include <mbed.h>
lballard9 0:8e3b9bb1084a 18 * #include <wave_player.h>
lballard9 0:8e3b9bb1084a 19 *
lballard9 0:8e3b9bb1084a 20 * AnalogOut DACout(p18);
lballard9 0:8e3b9bb1084a 21 * wave_player waver(&DACout);
lballard9 0:8e3b9bb1084a 22 *
lballard9 0:8e3b9bb1084a 23 * int main() {
lballard9 0:8e3b9bb1084a 24 * FILE *wave_file;
lballard9 0:8e3b9bb1084a 25 *
lballard9 0:8e3b9bb1084a 26 * printf("\n\n\nHello, wave world!\n");
lballard9 0:8e3b9bb1084a 27 * wave_file=fopen("/sd/44_8_st.wav","r");
lballard9 0:8e3b9bb1084a 28 * waver.play(wave_file);
lballard9 0:8e3b9bb1084a 29 * fclose(wave_file);
lballard9 0:8e3b9bb1084a 30 * }
lballard9 0:8e3b9bb1084a 31 * @endcode
lballard9 0:8e3b9bb1084a 32 */
lballard9 0:8e3b9bb1084a 33 class wave_player {
lballard9 0:8e3b9bb1084a 34
lballard9 0:8e3b9bb1084a 35 public:
lballard9 0:8e3b9bb1084a 36 /** Create a wave player using a pointer to the given AnalogOut object.
lballard9 0:8e3b9bb1084a 37 *
lballard9 0:8e3b9bb1084a 38 * @param _dac pointer to an AnalogOut object to which the samples are sent.
lballard9 0:8e3b9bb1084a 39 */
lballard9 0:8e3b9bb1084a 40 wave_player(AnalogOut *_dac);
lballard9 0:8e3b9bb1084a 41
lballard9 0:8e3b9bb1084a 42 /** the player function.
lballard9 0:8e3b9bb1084a 43 *
lballard9 0:8e3b9bb1084a 44 * @param wavefile A pointer to an opened wave file
lballard9 0:8e3b9bb1084a 45 */
lballard9 0:8e3b9bb1084a 46 void play(FILE *wavefile);
lballard9 0:8e3b9bb1084a 47
lballard9 0:8e3b9bb1084a 48 /** Set the printf verbosity of the wave player. A nonzero verbosity level
lballard9 0:8e3b9bb1084a 49 * will put wave_player in a mode where the complete contents of the wave
lballard9 0:8e3b9bb1084a 50 * file are echoed to the screen, including header values, and including
lballard9 0:8e3b9bb1084a 51 * all of the sample values placed into the DAC FIFO, and the sample values
lballard9 0:8e3b9bb1084a 52 * removed from the DAC FIFO by the ISR. The sample output frequency is
lballard9 0:8e3b9bb1084a 53 * fixed at 2 Hz in this mode, so it's all very slow and the DAC output isn't
lballard9 0:8e3b9bb1084a 54 * very useful, but it lets you see what's going on and may help for debugging
lballard9 0:8e3b9bb1084a 55 * wave files that don't play correctly.
lballard9 0:8e3b9bb1084a 56 *
lballard9 0:8e3b9bb1084a 57 * @param v the verbosity level
lballard9 0:8e3b9bb1084a 58 */
lballard9 0:8e3b9bb1084a 59 void set_verbosity(int v);
lballard9 0:8e3b9bb1084a 60
lballard9 0:8e3b9bb1084a 61 private:
lballard9 0:8e3b9bb1084a 62 void dac_out(void);
lballard9 0:8e3b9bb1084a 63 int verbosity;
lballard9 0:8e3b9bb1084a 64 AnalogOut *wave_DAC;
lballard9 0:8e3b9bb1084a 65 Ticker tick;
lballard9 0:8e3b9bb1084a 66 unsigned short DAC_fifo[256];
lballard9 0:8e3b9bb1084a 67 short DAC_wptr;
lballard9 0:8e3b9bb1084a 68 volatile short DAC_rptr;
lballard9 0:8e3b9bb1084a 69 short DAC_on;
lballard9 0:8e3b9bb1084a 70 };
lballard9 0:8e3b9bb1084a 71
lballard9 0:8e3b9bb1084a 72