![](/media/cache/group/renesas_logomark_l.jpg.50x50_q85.jpg)
This sample will play a ".wav" file of the USB root folder. Only RIFF format.
Fork of GR-PEACH_Audio_WAV by
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" } } }
main.cpp
- Committer:
- dkato
- Date:
- 2016-04-18
- Revision:
- 8:7121197d098e
- Parent:
- 7:4b6799c255ea
- Child:
- 9:a1045daef81d
File content as of revision 8:7121197d098e:
#include "mbed.h" #include "TLV320_RBSP.h" #include "USBHostMSD.h" #include "dec_wav.h" #if defined(TARGET_RZ_A1H) #include "usb_host_setting.h" #else #define USB_HOST_CH 0 #endif #if (USB_HOST_CH == 1) //Audio Shield USB1 DigitalOut usb1en(P3_8); #endif DigitalIn button(USER_BUTTON0); #define AUDIO_WRITE_BUFF_SIZE (4096) #define AUDIO_WRITE_BUFF_NUM (9) #define FILE_NAME_LEN (64) #define TEXT_SIZE (64 + 1) //null-terminated #define FLD_PATH "/usb/" //4 bytes aligned! No cache memory #if defined(__ICCARM__) #pragma data_alignment=4 static uint8_t audio_write_buff[AUDIO_WRITE_BUFF_NUM][AUDIO_WRITE_BUFF_SIZE]@ ".mirrorram"; #else static uint8_t audio_write_buff[AUDIO_WRITE_BUFF_NUM][AUDIO_WRITE_BUFF_SIZE] __attribute((section("NC_BSS"),aligned(4))); #endif //Tag buffer static uint8_t title_buf[TEXT_SIZE]; static uint8_t artist_buf[TEXT_SIZE]; static uint8_t album_buf[TEXT_SIZE]; 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) { if (result < 0) { printf("audio write callback error %d\n", result); } } int main() { rbsp_data_conf_t audio_write_async_ctl = {&callback_audio_write_end, NULL}; FILE * fp = NULL; DIR * d = NULL; char file_path[sizeof(FLD_PATH) + FILE_NAME_LEN]; int buff_index = 0; size_t audio_data_size; dec_wav wav_file; #if (USB_HOST_CH == 1) //Audio Shield USB1 //Audio Shield USB1 enable usb1en = 1; //Outputs high level Thread::wait(5); usb1en = 0; //Outputs low level #endif audio.power(0x02); // mic off audio.inputVolume(0.7, 0.7); USBHostMSD msd("usb"); while(1) { // try to connect a MSD device while(!msd.connect()) { Thread::wait(500); } // in a loop, append a file // if the device is disconnected, we try to connect it again while(1) { // if device disconnected, try to connect again if (!msd.connected()) { break; } if (fp == NULL) { // file search if (d == NULL) { d = opendir(FLD_PATH); } struct dirent * p; while ((p = readdir(d)) != NULL) { size_t len = strlen(p->d_name); if ((len > 4) && (len < FILE_NAME_LEN) && (memcmp(&p->d_name[len - 4], ".wav", 4) == 0)) { strcpy(file_path, FLD_PATH); strcat(file_path, p->d_name); fp = fopen(file_path, "r"); if (wav_file.AnalyzeHeder(title_buf, artist_buf, album_buf, TEXT_SIZE, fp) == false) { fclose(fp); fp = NULL; } else if ((wav_file.GetChannel() != 2) || (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("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; } } } if (p == NULL) { closedir(d); d = NULL; } } else { // file read uint8_t * p_buf = audio_write_buff[buff_index]; audio_data_size = wav_file.GetNextData(p_buf, AUDIO_WRITE_BUFF_SIZE); if (audio_data_size > 0) { audio.write(p_buf, audio_data_size, &audio_write_async_ctl); buff_index++; if (buff_index >= AUDIO_WRITE_BUFF_NUM) { buff_index = 0; } } // file close if ((audio_data_size < AUDIO_WRITE_BUFF_SIZE) || (button == 0)) { fclose(fp); fp = NULL; Thread::wait(500); } } } // close check if (fp != NULL) { fclose(fp); fp = NULL; } if (d != NULL) { closedir(d); d = NULL; } } }