Renesas
This sample will play a ".wav" file of the USB root folder. Only RIFF format.
Fork of
GR-PEACH_Audio_WAV
by 
Daiki Kato
Audio sample for GR-PEACH or GR-LYCHEE. This sample will play a ".wav" file in the root of USB memory or SD card. If the USER_BUTTON0 is pressed, the next song is played.
The default setting of serial communication (baud rate etc.) in mbed is shown the following link.
Please refer to the link and change the settings of your PC terminal software.
The default value of baud rate in mbed is 9600, and this application uses baud rate 9600.
https://developer.mbed.org/teams/Renesas/wiki/GR-PEACH-Getting-Started#install-the-usb-serial-communication
Please refer to following link about Audio/Camera Shield.
https://developer.mbed.org/teams/Renesas/wiki/Audio_Camera-shield
For GR-PEACH:
| Format | Wav file (RIFF format) ".wav" |
| Channel | 2ch |
| Frequencies | 32kHz, 44.1kHz, 48kHz, 88.2kHz and 96kHz |
| Quantization bit rate | 16bits, 24bits and 32bits |
For GR-LYCHEE:
| Format | Wav file (RIFF format) ".wav" |
| Channel | 2ch |
| Frequencies | 32kHz, 44.1kHz and 48kHz |
| Quantization bit rate | 16bits |
- Use USB0 of PEACH:
If you use the USB0 as USB Host, please close GR-PEACH's JP3.
Please select USB0 connector by the following configuration.
mbed_app.json
{
"config": {
"usb-host-ch":{
"help": "(for GR-PEACH) 0:ch0 1:ch1",
"value": "0"
},
"audio-camera-shield":{
"help": "(for GR-PEACH) 0:not use 1:use",
"value": "0"
}
}
}
- Use USB1 of GR-PEACH:
If you use the USB1 as USB Host, please close Audio/Camera Shield's JP1.
Please select Audio/Camera Shield and USB1 connector by the following configuration.
mbed_app.json
{
"config": {
"usb-host-ch":{
"help": "(for GR-PEACH) 0:ch0 1:ch1",
"value": "1"
},
"audio-camera-shield":{
"help": "(for GR-PEACH) 0:not use 1:use",
"value": "1"
}
}
}
Diff: dec_wav.h
- Revision:
- 7:4b6799c255ea
- Parent:
- 6:ad0b3ce4284b
--- a/dec_wav.h Fri Jun 26 07:35:16 2015 +0000
+++ b/dec_wav.h Tue Aug 18 04:19:19 2015 +0000
@@ -147,12 +147,54 @@
* @return get data size
*/
size_t GetNextData(void *buf, size_t len) {
- if ((music_data_index + len) > music_data_size) {
- len = music_data_size - music_data_index;
+ if (block_size == 24) {
+ // Add padding
+ int write_index = 0;
+ int wavfile_index;
+ int read_len;
+ int pading_index = 0;
+ uint8_t * p_buf = (uint8_t *)buf;
+ size_t ret;
+
+ if ((music_data_index + len) > music_data_size) {
+ len = music_data_size - music_data_index;
+ }
+ while (write_index < len) {
+ read_len = (len - write_index) * 3 / 4;
+ if (read_len > sizeof(wk_wavfile_buff)) {
+ read_len = sizeof(wk_wavfile_buff);
+ }
+ music_data_index += read_len;
+ ret = fread(wk_wavfile_buff, sizeof(char), read_len, wav_fp);
+ if (ret < read_len) {
+ break;
+ }
+ wavfile_index = 0;
+ while ((write_index < len) && (wavfile_index < read_len)) {
+ if (pading_index == 0) {
+ p_buf[write_index] = 0;
+ } else {
+ p_buf[write_index] = wk_wavfile_buff[wavfile_index];
+ wavfile_index++;
+ }
+ if (pading_index < 3) {
+ pading_index++;
+ } else {
+ pading_index = 0;
+ }
+ write_index++;
+ }
+ }
+
+ return write_index;
+ } else {
+ if ((music_data_index + len) > music_data_size) {
+ len = music_data_size - music_data_index;
+ }
+ music_data_index += len;
+
+ return fread(buf, sizeof(char), len, wav_fp);
}
- music_data_index += len;
-
- return fread(buf, sizeof(char), len, wav_fp);
};
/** get channel
@@ -175,15 +217,18 @@
*
* @return sampling rate
*/
- uint16_t GetSamplingRate() {
+ uint32_t GetSamplingRate() {
return sampling_rate;
};
private:
+ #define FILE_READ_BUFF_SIZE (3072)
+
FILE * wav_fp;
uint32_t music_data_size;
uint32_t music_data_index;
uint16_t channel;
uint16_t block_size;
uint32_t sampling_rate;
+ uint8_t wk_wavfile_buff[FILE_READ_BUFF_SIZE];
};