Hello World for SCUX. The SCUX driver can perform asynchronous and synchronous sampling rate conversions using the sampling rate converter.

Dependencies:   R_BSP USBHost mbed

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main.cpp

00001 #include "mbed.h"
00002 #include "R_BSP_Scux.h"
00003 #include "USBHostMSD.h"
00004 
00005 R_BSP_Scux scux(SCUX_CH_0);
00006 
00007 #define WRITE_SAMPLE_NUM (128)
00008 #define READ_SAMPLE_NUM  (2048)
00009 
00010 const short sin_data[WRITE_SAMPLE_NUM] = {
00011  0x0000,0x0000,0x0C8C,0x0C8C,0x18F9,0x18F9,0x2528,0x2528
00012 ,0x30FB,0x30FB,0x3C56,0x3C56,0x471C,0x471C,0x5133,0x5133
00013 ,0x5A82,0x5A82,0x62F1,0x62F1,0x6A6D,0x6A6D,0x70E2,0x70E2
00014 ,0x7641,0x7641,0x7A7C,0x7A7C,0x7D89,0x7D89,0x7F61,0x7F61
00015 ,0x7FFF,0x7FFF,0x7F61,0x7F61,0x7D89,0x7D89,0x7A7C,0x7A7C
00016 ,0x7641,0x7641,0x70E2,0x70E2,0x6A6D,0x6A6D,0x62F1,0x62F1
00017 ,0x5A82,0x5A82,0x5133,0x5133,0x471C,0x471C,0x3C56,0x3C56
00018 ,0x30FB,0x30FB,0x2528,0x2528,0x18F9,0x18F9,0x0C8C,0x0C8C
00019 ,0x0000,0x0000,0xF374,0xF374,0xE707,0xE707,0xDAD8,0xDAD8
00020 ,0xCF05,0xCF05,0xC3AA,0xC3AA,0xB8E4,0xB8E4,0xAECD,0xAECD
00021 ,0xA57E,0xA57E,0x9D0F,0x9D0F,0x9593,0x9593,0x8F1E,0x8F1E
00022 ,0x89BF,0x89BF,0x8584,0x8584,0x8277,0x8277,0x809F,0x809F
00023 ,0x8001,0x8001,0x809F,0x809F,0x8277,0x8277,0x8584,0x8584
00024 ,0x89BF,0x89BF,0x8F1E,0x8F1E,0x9593,0x9593,0x9D0F,0x9D0F
00025 ,0xA57E,0xA57E,0xAECD,0xAECD,0xB8E4,0xB8E4,0xC3AA,0xC3AA
00026 ,0xCF05,0xCF05,0xDAD8,0xDAD8,0xE707,0xE707,0xF374,0xF374
00027 };
00028 
00029 #if defined(__ICCARM__)
00030 #pragma data_alignment=4
00031 short write_buff[WRITE_SAMPLE_NUM]@ ".mirrorram";
00032 #pragma data_alignment=4
00033 short read_buff[READ_SAMPLE_NUM]@ ".mirrorram";
00034 #else
00035 short write_buff[WRITE_SAMPLE_NUM] __attribute((section("NC_BSS"),aligned(4)));
00036 short read_buff[READ_SAMPLE_NUM] __attribute((section("NC_BSS"),aligned(4)));
00037 #endif
00038 
00039 void scux_setup(void);
00040 void write_task(void const*);
00041 void file_output_to_usb(void);
00042 
00043 int main(void) {
00044     // set up SRC parameters.
00045     scux_setup();
00046 
00047     printf("Sampling rate conversion Start.\n");
00048     // start accepting transmit/receive requests.
00049     scux.TransStart();
00050 
00051     // create a new thread to write to SCUX.
00052     Thread writeTask(write_task, NULL, osPriorityNormal, 1024 * 4);
00053 
00054     // receive request to the SCUX driver.
00055     scux.read(read_buff, sizeof(read_buff));
00056     printf("Sampling rate conversion End.\n");
00057 
00058     // output binary file to USB port 0.
00059     file_output_to_usb();
00060 }
00061 
00062 void scux_setup(void) {
00063     scux_src_usr_cfg_t src_cfg;
00064 
00065     src_cfg.src_enable           = true;
00066     src_cfg.word_len             = SCUX_DATA_LEN_16;
00067     src_cfg.mode_sync            = true;
00068     src_cfg.input_rate           = SAMPLING_RATE_48000HZ;
00069     src_cfg.output_rate          = SAMPLING_RATE_96000HZ;
00070     src_cfg.select_in_data_ch[0] = SELECT_IN_DATA_CH_0;
00071     src_cfg.select_in_data_ch[1] = SELECT_IN_DATA_CH_1;
00072 
00073     scux.SetSrcCfg(&src_cfg);
00074 }
00075 
00076 void scux_flush_callback(int scux_ch) {
00077     // do nothing
00078 }
00079 
00080 void write_task(void const*) {
00081     memcpy(write_buff, sin_data, sizeof(write_buff));
00082     // send request to the SCUX driver.
00083     scux.write(write_buff, sizeof(write_buff));
00084 
00085     // stop the acceptance of transmit/receive requests.
00086     scux.FlushStop(&scux_flush_callback);
00087 }
00088 
00089 void file_output_to_usb(void) {
00090     FILE * fp = NULL;
00091     int i;
00092 
00093     USBHostMSD msd("usb");
00094 
00095     // try to connect a MSD device
00096     for(i = 0; i < 10; i++) {
00097         if (msd.connect()) {
00098             break;
00099         }
00100         wait(0.5);
00101     }
00102 
00103     if (msd.connected()) {
00104         fp = fopen("/usb/scux_input.dat", "rb");
00105         if (fp == NULL) {
00106             fp = fopen("/usb/scux_input.dat", "wb");
00107             if (fp != NULL) {
00108                 fwrite(write_buff, sizeof(short), WRITE_SAMPLE_NUM, fp);
00109                 fclose(fp);
00110                 printf("Output binary file(Input data) to USB.\n");
00111             } else {
00112                 printf("Failed to output binary file(Input data).\n");
00113             }
00114         } else {
00115             printf("Binary file(Input data) exists.\n");
00116             fclose(fp);
00117         }
00118 
00119         fp = fopen("/usb/scux_output.dat", "rb");
00120         if (fp == NULL) {
00121             fp = fopen("/usb/scux_output.dat", "wb");
00122             if (fp != NULL) {
00123                 fwrite(read_buff, sizeof(short), READ_SAMPLE_NUM, fp);
00124                 fclose(fp);
00125                 printf("Output binary file(Output data) to USB.\n");
00126             } else {
00127                 printf("Failed to output binary file(Output data).\n");
00128             }
00129         } else {
00130             printf("Binary file(Output data) exists.\n");
00131             fclose(fp);
00132         }
00133     } else {
00134         printf("Failed to connect to the USB device.\n");
00135     }
00136 }