Daiki Kato
This is a sample that drives a speaker with PWM.
Fork of
GR-PEACH_Audio_WAV
by 
Renesas
This is a sample that drives a speaker with PWM. This sample will play a ".wav" file of the microSD or USB memory root folder. If the USER_BUTTON0 is pressed, the next song is played.
| Format | Wav file (RIFF format) ".wav" |
| Channel | 1ch and 2ch |
| Frequencies | 32kHz, 44.1kHz and 48kHz |
| Quantization bit rate | 8bits and 16bits |
You can adjust the volume by changing the following.
main.cpp
AudioPlayer.outputVolume(0.5); // Volume control (min:0.0 max:1.0)
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
Revision 7:4b6799c255ea, committed 2015-08-18
- Comitter:
- dkato
- Date:
- Tue Aug 18 04:19:19 2015 +0000
- Parent:
- 6:ad0b3ce4284b
- Child:
- 8:7121197d098e
- Commit message:
- High-Resolution Audio
Changed in this revision
--- a/R_BSP.lib Fri Jun 26 07:35:16 2015 +0000 +++ b/R_BSP.lib Tue Aug 18 04:19:19 2015 +0000 @@ -1,1 +1,1 @@ -http://developer.mbed.org/teams/Renesas/code/R_BSP/#b72e037c50c3 +http://developer.mbed.org/teams/Renesas/code/R_BSP/#1390bfcb667c
--- a/TLV320_RBSP.lib Fri Jun 26 07:35:16 2015 +0000 +++ b/TLV320_RBSP.lib Tue Aug 18 04:19:19 2015 +0000 @@ -1,1 +1,1 @@ -http://developer.mbed.org/teams/Renesas/code/TLV320_RBSP/#4b34a496efac +http://developer.mbed.org/teams/Renesas/code/TLV320_RBSP/#b1fab4a2b59d
--- 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];
};
--- a/main.cpp Fri Jun 26 07:35:16 2015 +0000
+++ b/main.cpp Tue Aug 18 04:19:19 2015 +0000
@@ -28,7 +28,7 @@
static uint8_t artist_buf[TEXT_SIZE];
static uint8_t album_buf[TEXT_SIZE];
-TLV320_RBSP audio(P3_13, P10_13, I2C_SDA, I2C_SCL, P4_4, P4_5, P4_7, P4_6,
+TLV320_RBSP audio(P10_13, I2C_SDA, I2C_SCL, P4_4, P4_5, P4_7, P4_6,
0x80, (AUDIO_WRITE_BUFF_NUM - 1), 0);
static void callback_audio_write_end(void * p_data, int32_t result, void * p_app_data) {
@@ -89,15 +89,21 @@
fclose(fp);
fp = NULL;
} else if ((wav_file.GetChannel() != 2)
- || (wav_file.GetBlockSize() != 16)
- || (wav_file.GetSamplingRate() != 44100)) {
+ || (audio.format(wav_file.GetBlockSize()) == false)
+ || (audio.frequency(wav_file.GetSamplingRate()) == false)) {
+ printf("Error File :%s\n", p->d_name);
+ printf("Audio Info :%dch, %dbit, %dHz\n", wav_file.GetChannel(),
+ wav_file.GetBlockSize(), wav_file.GetSamplingRate());
+ printf("\n");
fclose(fp);
fp = NULL;
} else {
- printf("File :%s\n", p->d_name);
- printf("Title :%s\n", title_buf);
- printf("Artist:%s\n", artist_buf);
- printf("Album :%s\n", album_buf);
+ printf("File :%s\n", p->d_name);
+ printf("Audio Info :%dch, %dbit, %dHz\n", wav_file.GetChannel(),
+ wav_file.GetBlockSize(), wav_file.GetSamplingRate());
+ printf("Title :%s\n", title_buf);
+ printf("Artist :%s\n", artist_buf);
+ printf("Album :%s\n", album_buf);
printf("\n");
break;
}
--- a/mbed.bld Fri Jun 26 07:35:16 2015 +0000 +++ b/mbed.bld Tue Aug 18 04:19:19 2015 +0000 @@ -1,1 +1,1 @@ -http://mbed.org/users/mbed_official/code/mbed/builds/cbbeb26dbd92 \ No newline at end of file +http://mbed.org/users/mbed_official/code/mbed/builds/b9ad9a133dc7 \ No newline at end of file