Daiki Kato / Mbed OS GR-PEACH_Audio_WAV_PwmOut Featured

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Dependencies:   EasyPlayback

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.

/media/uploads/dkato/pwm_speaker_img.png

FormatWav file (RIFF format) ".wav"
Channel1ch and 2ch
Frequencies32kHz, 44.1kHz and 48kHz
Quantization bit rate8bits 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

main.cpp@7:4b6799c255ea, 2015-08-18 (annotated)

Committer:
dkato
Date:
Tue Aug 18 04:19:19 2015 +0000
Revision:
7:4b6799c255ea
Parent:
5:983467c1466b
Child:
8:7121197d098e
High-Resolution Audio

Who changed what in which revision?

UserRevisionLine numberNew contents of line
dkato 0:a24aaf3a41b1 1 #include "mbed.h"
dkato 0:a24aaf3a41b1 2 #include "TLV320_RBSP.h"
dkato 0:a24aaf3a41b1 3 #include "USBHostMSD.h"
dkato 4:01651a6c3f9a 4 #include "dec_wav.h"
dkato 4:01651a6c3f9a 5
dkato 0:a24aaf3a41b1 6 #if defined(TARGET_RZ_A1H)
dkato 0:a24aaf3a41b1 7 #include "usb_host_setting.h"
dkato 0:a24aaf3a41b1 8 #else
dkato 0:a24aaf3a41b1 9 #define USB_HOST_CH 0
dkato 0:a24aaf3a41b1 10 #endif
dkato 0:a24aaf3a41b1 11
dkato 0:a24aaf3a41b1 12 #if (USB_HOST_CH == 1) //Audio Shield USB1
dkato 0:a24aaf3a41b1 13 DigitalOut usb1en(P3_8);
dkato 0:a24aaf3a41b1 14 #endif
dkato 0:a24aaf3a41b1 15 DigitalIn button(USER_BUTTON0);
dkato 0:a24aaf3a41b1 16
dkato 4:01651a6c3f9a 17 #define AUDIO_WRITE_BUFF_SIZE (4096)
dkato 4:01651a6c3f9a 18 #define AUDIO_WRITE_BUFF_NUM (9)
dkato 0:a24aaf3a41b1 19 #define FILE_NAME_LEN (64)
dkato 4:01651a6c3f9a 20 #define TEXT_SIZE (64 + 1) //null-terminated
dkato 1:967144cffd53 21 #define FLD_PATH "/usb/"
dkato 0:a24aaf3a41b1 22
dkato 4:01651a6c3f9a 23 //4 bytes aligned! No cache memory
dkato 4:01651a6c3f9a 24 static uint8_t audio_write_buff[AUDIO_WRITE_BUFF_NUM][AUDIO_WRITE_BUFF_SIZE]
dkato 4:01651a6c3f9a 25 __attribute((section("NC_BSS"),aligned(4)));
dkato 4:01651a6c3f9a 26 //Tag buffer
dkato 4:01651a6c3f9a 27 static uint8_t title_buf[TEXT_SIZE];
dkato 4:01651a6c3f9a 28 static uint8_t artist_buf[TEXT_SIZE];
dkato 4:01651a6c3f9a 29 static uint8_t album_buf[TEXT_SIZE];
dkato 0:a24aaf3a41b1 30
dkato 7:4b6799c255ea 31 TLV320_RBSP audio(P10_13, I2C_SDA, I2C_SCL, P4_4, P4_5, P4_7, P4_6,
dkato 4:01651a6c3f9a 32 0x80, (AUDIO_WRITE_BUFF_NUM - 1), 0);
dkato 0:a24aaf3a41b1 33
dkato 4:01651a6c3f9a 34 static void callback_audio_write_end(void * p_data, int32_t result, void * p_app_data) {
dkato 0:a24aaf3a41b1 35 if (result < 0) {
dkato 4:01651a6c3f9a 36 printf("audio write callback error %d\n", result);
dkato 0:a24aaf3a41b1 37 }
dkato 0:a24aaf3a41b1 38 }
dkato 0:a24aaf3a41b1 39
dkato 4:01651a6c3f9a 40 int main() {
dkato 4:01651a6c3f9a 41 rbsp_data_conf_t audio_write_async_ctl = {&callback_audio_write_end, NULL};
dkato 0:a24aaf3a41b1 42 FILE * fp = NULL;
dkato 0:a24aaf3a41b1 43 DIR * d = NULL;
dkato 0:a24aaf3a41b1 44 char file_path[sizeof(FLD_PATH) + FILE_NAME_LEN];
dkato 4:01651a6c3f9a 45 int buff_index = 0;
dkato 1:967144cffd53 46 size_t audio_data_size;
dkato 4:01651a6c3f9a 47 dec_wav wav_file;
dkato 0:a24aaf3a41b1 48
dkato 5:983467c1466b 49 #if (USB_HOST_CH == 1) //Audio Shield USB1
dkato 5:983467c1466b 50 //Audio Shield USB1 enable
dkato 5:983467c1466b 51 usb1en = 1; //Outputs high level
dkato 5:983467c1466b 52 Thread::wait(5);
dkato 5:983467c1466b 53 usb1en = 0; //Outputs low level
dkato 5:983467c1466b 54 #endif
dkato 5:983467c1466b 55
dkato 0:a24aaf3a41b1 56 audio.power(0x02); // mic off
dkato 0:a24aaf3a41b1 57 audio.inputVolume(0.7, 0.7);
dkato 0:a24aaf3a41b1 58
dkato 0:a24aaf3a41b1 59 USBHostMSD msd("usb");
dkato 0:a24aaf3a41b1 60
dkato 0:a24aaf3a41b1 61 while(1) {
dkato 0:a24aaf3a41b1 62 // try to connect a MSD device
dkato 0:a24aaf3a41b1 63 while(!msd.connect()) {
dkato 0:a24aaf3a41b1 64 Thread::wait(500);
dkato 0:a24aaf3a41b1 65 }
dkato 0:a24aaf3a41b1 66
dkato 0:a24aaf3a41b1 67 // in a loop, append a file
dkato 0:a24aaf3a41b1 68 // if the device is disconnected, we try to connect it again
dkato 0:a24aaf3a41b1 69 while(1) {
dkato 0:a24aaf3a41b1 70 // if device disconnected, try to connect again
dkato 0:a24aaf3a41b1 71 if (!msd.connected()) {
dkato 0:a24aaf3a41b1 72 break;
dkato 0:a24aaf3a41b1 73 }
dkato 0:a24aaf3a41b1 74 if (fp == NULL) {
dkato 0:a24aaf3a41b1 75 // file search
dkato 0:a24aaf3a41b1 76 if (d == NULL) {
dkato 0:a24aaf3a41b1 77 d = opendir(FLD_PATH);
dkato 0:a24aaf3a41b1 78 }
dkato 0:a24aaf3a41b1 79 struct dirent * p;
dkato 0:a24aaf3a41b1 80 while ((p = readdir(d)) != NULL) {
dkato 0:a24aaf3a41b1 81 size_t len = strlen(p->d_name);
dkato 4:01651a6c3f9a 82 if ((len > 4) && (len < FILE_NAME_LEN)
dkato 4:01651a6c3f9a 83 && (memcmp(&p->d_name[len - 4], ".wav", 4) == 0)) {
dkato 0:a24aaf3a41b1 84 strcpy(file_path, FLD_PATH);
dkato 0:a24aaf3a41b1 85 strcat(file_path, p->d_name);
dkato 0:a24aaf3a41b1 86 fp = fopen(file_path, "r");
dkato 5:983467c1466b 87 if (wav_file.AnalyzeHeder(title_buf, artist_buf, album_buf,
dkato 4:01651a6c3f9a 88 TEXT_SIZE, fp) == false) {
dkato 0:a24aaf3a41b1 89 fclose(fp);
dkato 0:a24aaf3a41b1 90 fp = NULL;
dkato 5:983467c1466b 91 } else if ((wav_file.GetChannel() != 2)
dkato 7:4b6799c255ea 92 || (audio.format(wav_file.GetBlockSize()) == false)
dkato 7:4b6799c255ea 93 || (audio.frequency(wav_file.GetSamplingRate()) == false)) {
dkato 7:4b6799c255ea 94 printf("Error File :%s\n", p->d_name);
dkato 7:4b6799c255ea 95 printf("Audio Info :%dch, %dbit, %dHz\n", wav_file.GetChannel(),
dkato 7:4b6799c255ea 96 wav_file.GetBlockSize(), wav_file.GetSamplingRate());
dkato 7:4b6799c255ea 97 printf("\n");
dkato 5:983467c1466b 98 fclose(fp);
dkato 5:983467c1466b 99 fp = NULL;
dkato 0:a24aaf3a41b1 100 } else {
dkato 7:4b6799c255ea 101 printf("File :%s\n", p->d_name);
dkato 7:4b6799c255ea 102 printf("Audio Info :%dch, %dbit, %dHz\n", wav_file.GetChannel(),
dkato 7:4b6799c255ea 103 wav_file.GetBlockSize(), wav_file.GetSamplingRate());
dkato 7:4b6799c255ea 104 printf("Title :%s\n", title_buf);
dkato 7:4b6799c255ea 105 printf("Artist :%s\n", artist_buf);
dkato 7:4b6799c255ea 106 printf("Album :%s\n", album_buf);
dkato 0:a24aaf3a41b1 107 printf("\n");
dkato 0:a24aaf3a41b1 108 break;
dkato 0:a24aaf3a41b1 109 }
dkato 0:a24aaf3a41b1 110 }
dkato 0:a24aaf3a41b1 111 }
dkato 0:a24aaf3a41b1 112 if (p == NULL) {
dkato 0:a24aaf3a41b1 113 closedir(d);
dkato 0:a24aaf3a41b1 114 d = NULL;
dkato 0:a24aaf3a41b1 115 }
dkato 0:a24aaf3a41b1 116 } else {
dkato 0:a24aaf3a41b1 117 // file read
dkato 4:01651a6c3f9a 118 uint8_t * p_buf = audio_write_buff[buff_index];
dkato 0:a24aaf3a41b1 119
dkato 5:983467c1466b 120 audio_data_size = wav_file.GetNextData(p_buf, AUDIO_WRITE_BUFF_SIZE);
dkato 4:01651a6c3f9a 121 if (audio_data_size > 0) {
dkato 4:01651a6c3f9a 122 audio.write(p_buf, audio_data_size, &audio_write_async_ctl);
dkato 4:01651a6c3f9a 123 buff_index++;
dkato 4:01651a6c3f9a 124 if (buff_index >= AUDIO_WRITE_BUFF_NUM) {
dkato 4:01651a6c3f9a 125 buff_index = 0;
dkato 0:a24aaf3a41b1 126 }
dkato 0:a24aaf3a41b1 127 }
dkato 0:a24aaf3a41b1 128
dkato 0:a24aaf3a41b1 129 // file close
dkato 4:01651a6c3f9a 130 if ((audio_data_size < AUDIO_WRITE_BUFF_SIZE) || (button == 0)) {
dkato 0:a24aaf3a41b1 131 fclose(fp);
dkato 0:a24aaf3a41b1 132 fp = NULL;
dkato 0:a24aaf3a41b1 133 Thread::wait(500);
dkato 0:a24aaf3a41b1 134 }
dkato 0:a24aaf3a41b1 135 }
dkato 0:a24aaf3a41b1 136 }
dkato 0:a24aaf3a41b1 137
dkato 0:a24aaf3a41b1 138 // close check
dkato 0:a24aaf3a41b1 139 if (fp != NULL) {
dkato 0:a24aaf3a41b1 140 fclose(fp);
dkato 0:a24aaf3a41b1 141 fp = NULL;
dkato 0:a24aaf3a41b1 142 }
dkato 0:a24aaf3a41b1 143 if (d != NULL) {
dkato 0:a24aaf3a41b1 144 closedir(d);
dkato 0:a24aaf3a41b1 145 d = NULL;
dkato 0:a24aaf3a41b1 146 }
dkato 0:a24aaf3a41b1 147 }
dkato 0:a24aaf3a41b1 148 }