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"
}
}
}
dec_wav.h
- Committer:
- dkato
- Date:
- 2015-06-24
- Revision:
- 4:01651a6c3f9a
- Child:
- 5:983467c1466b
File content as of revision 4:01651a6c3f9a:
/**************************************************************************//**
* @file dec_wav.h
* @brief wav
******************************************************************************/
#include "mbed.h"
/** A class to communicate a dec_wav
*
*/
class dec_wav {
public:
/** analyze header
*
* @param p_title title tag buffer
* @param p_artist artist tag buffer
* @param p_album album tag buffer
* @param tag_size tag buffer size
* @param fp file pointer
* @return true = success, false = failure
*/
bool analyze_heder(uint8_t * p_title, uint8_t * p_artist, uint8_t * p_album, uint16_t tag_size, FILE * fp) {
bool result = false;
size_t read_size;
uint8_t wk_read_buff[36];
uint8_t *data;
uint32_t chunk_size;
uint32_t sub_chunk_size;
uint32_t list_index_max;
bool list_ok = false;
uint32_t read_index = 0;
uint32_t data_index = 0;
uint16_t wk_len;
uint16_t ch;
uint32_t sampling_rate;
uint16_t block_size;
if (fp == NULL) {
return false;
}
music_data_size = 0;
music_data_index = 0;
wav_fp = fp;
if (p_title != NULL) {
p_title[0] = '\0';
}
if (p_artist != NULL) {
p_artist[0] = '\0';
}
if (p_album != NULL) {
p_album[0] = '\0';
}
read_size = fread(&wk_read_buff[0], sizeof(char), 36, wav_fp);
if (read_size < 36) {
// do nothing
} else if (memcmp(&wk_read_buff[0], "RIFF", 4) != 0) {
// do nothing
} else if (memcmp(&wk_read_buff[8], "WAVE", 4) != 0) {
// do nothing
} else if (memcmp(&wk_read_buff[12], "fmt ", 4) != 0) {
// do nothing
} else {
read_index += 36;
ch = ((uint32_t)wk_read_buff[22] << 0) + ((uint32_t)wk_read_buff[23] << 8);
sampling_rate = ((uint32_t)wk_read_buff[24] << 0)
+ ((uint32_t)wk_read_buff[25] << 8)
+ ((uint32_t)wk_read_buff[26] << 16)
+ ((uint32_t)wk_read_buff[27] << 24);
block_size = ((uint32_t)wk_read_buff[34] << 0) + ((uint32_t)wk_read_buff[35] << 8);
if ((ch != 2) || (block_size != 16) || (sampling_rate != 44100)) {
return false;
}
while (1) {
read_size = fread(&wk_read_buff[0], sizeof(char), 8, wav_fp);
read_index += 8;
if (read_size < 8) {
break;
} else {
chunk_size = ((uint32_t)wk_read_buff[4] << 0)
+ ((uint32_t)wk_read_buff[5] << 8)
+ ((uint32_t)wk_read_buff[6] << 16)
+ ((uint32_t)wk_read_buff[7] << 24);
if (memcmp(&wk_read_buff[0], "data", 4) == 0) {
result = true;
music_data_size = chunk_size;
if (list_ok == true) {
break;
} else {
data_index = read_index;
fseek(wav_fp, chunk_size, SEEK_CUR);
read_index += chunk_size;
}
} else if (memcmp(&wk_read_buff[0], "LIST", 4) == 0) {
list_ok = true;
list_index_max = read_index + chunk_size;
read_size = fread(&wk_read_buff[0], sizeof(char), 4, wav_fp);
read_index += 4;
while (read_index < list_index_max) {
read_size = fread(&wk_read_buff[0], sizeof(char), 8, wav_fp);
read_index += 8;
if (read_size < 8) {
break;
} else if (memcmp(&wk_read_buff[0], "INAM", 4) == 0) {
data = p_title;
} else if (memcmp(&wk_read_buff[0], "IART", 4) == 0) {
data = p_artist;
} else if (memcmp(&wk_read_buff[0], "IPRD", 4) == 0) {
data = p_album;
} else {
data = NULL;
}
if ((data != NULL) && (tag_size != 0)) {
sub_chunk_size = ((uint32_t)wk_read_buff[4] << 0)
+ ((uint32_t)wk_read_buff[5] << 8)
+ ((uint32_t)wk_read_buff[6] << 16)
+ ((uint32_t)wk_read_buff[7] << 24);
if (sub_chunk_size > (tag_size - 1)) {
wk_len = (tag_size - 1);
} else {
wk_len = sub_chunk_size;
}
read_size = fread(data, sizeof(char), wk_len, wav_fp);
read_index += sub_chunk_size;
fseek(wav_fp, read_index, SEEK_SET);
data[wk_len] = '\0';
}
}
if (data_index != 0) {
break;
} else {
fseek(wav_fp, list_index_max, SEEK_SET);
}
} else {
fseek(wav_fp, chunk_size, SEEK_CUR);
read_index += chunk_size;
}
}
}
if (data_index != 0) {
fseek(wav_fp, data_index, SEEK_SET);
}
}
return result;
};
/** get next data
*
* @param buf data buffer address
* @param len data buffer length
* @return get data size
*/
size_t get_next_data(void *buf, size_t len) {
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);
};
private:
FILE * wav_fp;
uint32_t music_data_size;
uint32_t music_data_index;
};