mi mi
16bit resolution PWM wave player with SD card, super lite version.
Dependencies: mbed DirectSPI FastPWM
Supported boards (confirmed):
Nucleo-F030R8
Nucleo-L152RE
Nucleo-F401RE
Nucleo-F411RE
Only compilation is OK (unchecked, but may work):
Nucleo-L073RZ
Nucleo-F334R8
Nucleo-F303RE
Nucleo-F429ZI
Nucleo-F446RE
Nucleo-F446ZE
Nucleo-L476RG
Supported SD card:
SDSC/SDHC card,
FAT16 and FAT32.
(1) At first, format SD card using SD Card Formatter
https://www.sdcard.org/downloads/formatter_4/index.html
(2) Copy PCM wav files to the SD card.
Supported file:
PCM wave file that have file extension ".wav" on root directory.
16bit/8bit, fs(sampling rate)=32kHz,44.1kHz,48kHz.
Stereo/Mono.
Hardware setting:
Refer to the file port_setting.txt
PWM output port:
Left upper(Hi) PWM 8bit out: PB_5 (TM3_CH2)
Right upper(Hi) PWM 8bit out: PB4 (TM3_CH1)
Left lower(Low) PWM 8bit out: PC_9 (TM3_CH4)
Right lower(Low) PWM 8bit out: PC_8 (TM3_CH3)
USER_BUTTON: PC_13(default button)
Next song: One click in Play mode.
Pause : Push long time .
Play : One click from Pause.
Diff: wave_player_main.cpp
- Revision:
- 18:082bce602af9
- Parent:
- 13:544349ffb861
- Child:
- 19:54aed6200a35
--- a/wave_player_main.cpp Sun Feb 17 15:10:58 2019 +0900
+++ b/wave_player_main.cpp Sat Feb 23 21:12:14 2019 +0900
@@ -48,38 +48,35 @@
test_port =1;
#endif
#if PWM16BIT
- word wL_low,wL_hi,wR_low,wR_hi;
- dword dw;
+ byte bL_low,bL_hi,bR_low,bR_hi;
if( lbSample_bits == 16 ) {
- dw = ((word)(send_ff() + (send_ff()<<8) + 0x8000)) << bVolumeUpFactor;
- wL_low = wR_low = (dw & 0xff); // get lower 8bit
- wL_hi = wR_hi = (dw >>8); // get upper 10bit
+ bL_low = bR_low = send_ff();
+ bL_hi = bR_hi = send_ff() + 0x80;
lwReadCount -= 2;
if( lbCh_mode == CH_STEREO ) {
- dw = ((word)(send_ff() + (send_ff()<<8) + 0x8000)) << bVolumeUpFactor;
- wR_low = (dw & 0xff);
- wR_hi = (dw >> 8);
+ bR_low = send_ff();
+ bR_hi = send_ff() + 0x80;
lwReadCount -= 2;
}
}
#if DATA_8BIT_SUPPORT
else { /* 8bit data */
- wL_hi = wR_hi = send_ff() << bVolumeUpFactor; // volume up to 10bit (x4) from 8bit
- wL_low = 0;
- wR_low = 0;
+ bL_hi = bR_hi = send_ff();
+ bL_low = 0;
+ bR_low = 0;
lwReadCount -= 1;
if( lbCh_mode == CH_STEREO ) { /* for stereo */
- wR_hi = send_ff() << 2;
- wR_low = 0;
+ bR_hi = send_ff();
+ bR_low = 0;
lwReadCount -= 1;
}
}
#endif
//# change pwm duties
- pwm_dutyL_hi( wL_hi ) ;
- pwm_dutyL_low( wL_low ) ;
- pwm_dutyR_hi( wR_hi ) ;
- pwm_dutyR_low( wR_low ) ;
+ pwm_dutyL_hi( ((word)bL_hi) << bVolumeUpFactor );
+ pwm_dutyL_low( ((word)bL_low) << bVolumeUpFactor );
+ pwm_dutyR_hi( ((word)bR_hi) << bVolumeUpFactor );
+ pwm_dutyR_low( ((word)bR_low) << bVolumeUpFactor );
#else // not PWM16BIT
word wL =0,wR = 0;
@@ -93,7 +90,7 @@
}
#if DATA_8BIT_SUPPORT
else { /* 8bit data */
- wL = wR = send_ff() << bVolumeUpFactor; // volume up to 10bit (x4) from 8bit
+ wL = wR = send_ff() << bVolumeUpFactor;
lwReadCount -= 1;
if( lbCh_mode == CH_STEREO ) { /* for stereo */
wR = send_ff() << bVolumeUpFactor;