Diff: main.cpp

Revision:

0:63ed631d8c3a

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Fri Jan 21 08:39:48 2011 +0000
@@ -0,0 +1,161 @@
+#include "mbed.h"
+#include "MSCFileSystem.h"
+#include "SDHCFileSystem.h"
+#include "i2s_irq_test.h"
+#include "lpc17xx_i2s.h"
+#include "lpc17xx_clkpwr.h"
+#include "aic23b_comm.h"
+#include "string"
+
+
+DigitalOut led1(LED1); 
+DigitalOut led2(LED2);
+DigitalOut led3(LED3); 
+Serial pc(USBTX, USBRX); // tx, rx       
+I2C AIC23B(p9,p10);     //sda,scl
+SDFileSystem sd(p11, p12, p13, p14, "sd");//p5,6,7,8
+MSCFileSystem msc("msc"); // Mount flash drive under the name "msc"
+
+
+FILE    *infp,*outfp;
+Ticker  tick;
+// a FIFO for the DAC
+#define RAM_LENGTH 8192//8192
+#define RAM_LIMIT (RAM_LENGTH - 1) 
+volatile static signed short DAC_fifo[RAM_LENGTH];
+volatile long int DAC_diff;
+
+
+int aic23b_send(int addr,char ctrl_address,char ctrl_data){
+    int flag;
+    char cmd[2];
+    cmd[0]=ctrl_address;
+    cmd[1]=ctrl_data;
+    flag = AIC23B.write(addr, cmd, 2);
+    pc.printf("ADDR=0x%x, CTRL_ADD=0x%x, CTRL_DATA=0x%x, RESP=0x%x\r\n",(addr&0x7f),cmd[0],cmd[1],flag);
+    return (flag);
+}
+
+void aic23b_init(void){
+    int flag=0;
+    printf("*************************\r\nReset TLV320AIC23B\r\n*************************\r\n");
+    AIC23B.frequency(150000);   
+    flag = aic23b_send(AIC23B_ADDRESS,RESET_REFGISTER,RESET);
+    wait(0.1);
+    flag += aic23b_send(AIC23B_ADDRESS,POWER_DOWN_CONTROL,0);
+    wait(0.1);
+    flag += aic23b_send(AIC23B_ADDRESS,POWER_DOWN_CONTROL,1);
+    wait(0.1);
+    flag += aic23b_send(AIC23B_ADDRESS,DIGITAL_AUDIO_INTERFACE_FORMAT,(MASTER_MODE|INPUT_DATA_16_BIT_LENGTH|I2S_FORMAT));
+    wait(0.1);
+    flag += aic23b_send(AIC23B_ADDRESS,SAMPLE_RATE_CONTROL,((0x06<<2)|0x01/*(SR_USB_44_1_KHZ_MODE| BOSR_USB_44_1_KHZ_MODE| USE_USB_CLOCK_44_1_KHZ_MODE)*/));
+    wait(0.1);
+    flag += aic23b_send(AIC23B_ADDRESS,ANALOG_AUDIO_PATH_CONTROL,0x10);
+    wait(0.1);
+    flag += aic23b_send(AIC23B_ADDRESS,DIGITAL_AUDIO_PATH_CONTROL,0);
+    wait(0.1);
+    flag += aic23b_send(AIC23B_ADDRESS,DIGITAL_INTERFACE_ACTIVATION,DIGITAL_INTERFACE_ACTIVE);
+    wait(0.1);
+    flag += aic23b_send(AIC23B_ADDRESS,LEFT_CHANNEL_HEADPHONE_VOLUME_CONTROL,LHV_VOLUME_DEFAULT);
+    wait(0.1);
+    flag += aic23b_send(AIC23B_ADDRESS,RIGHT_CHANNEL_HEADPHONE_VOLUME_CONTROL,RHV_VOLUME_DEFAULT);
+ 
+    if(!flag) printf("*************************\r\nReset OK\r\n*************************\r\n");
+    else printf("*************************\r\nReset FAILED\r\n*************************\r\n");
+}
+
+
+void dac_out(void)
+{
+  
+ volatile static unsigned short DAC_rptr;
+volatile static unsigned long dataLR;
+    if (DAC_diff > 18) {
+            led2 = 0;
+            short llp;        
+            for(llp=0;llp < 9;llp++){
+                if(I2S_GetLevel(LPC_I2S, I2S_TX_MODE)==TXFIFO_FULL)break;
+                dataLR = (0xffff0000 & (DAC_fifo[DAC_rptr++]<<16))|(0x0000ffff & DAC_fifo[DAC_rptr++]);
+                I2S_Send(LPC_I2S,dataLR);
+                DAC_rptr &= RAM_LIMIT;
+                DAC_diff -= 2;
+            }
+       
+   }else led2 = 1;
+   
+}
+
+void decode(void){
+    volatile static unsigned short DAC_wptr=0;
+    volatile static long int decode_buff;
+    volatile long diff=0,diff2=0;
+    while(1){
+        
+        volatile short buffLR;
+        
+        if((buffLR = 0xff & fgetc(infp))==EOF)break;
+        buffLR |= 0xff00 & (fgetc(infp) << 8);
+        diff = buffLR;
+        DAC_fifo[DAC_wptr++]=(signed short)diff;      
+        DAC_wptr &= RAM_LIMIT;
+       // DAC_diff++;
+        
+        while (DAC_diff > RAM_LIMIT){
+            led1 = 1;
+        }   //wait
+        led1=0;
+
+        if((buffLR = 0xff & fgetc(infp))==EOF)break;
+        buffLR |= 0xff00 & (fgetc(infp) << 8);
+        diff = buffLR;
+        DAC_fifo[DAC_wptr++]=(signed short)diff;      
+        DAC_wptr &= RAM_LIMIT;
+        DAC_diff+=2;
+       
+      
+
+        
+        while (DAC_diff > RAM_LIMIT){
+            led1 = 1;
+        }   //wait
+        led1=0;
+
+    
+         
+    }
+}
+
+  
+int main() {
+
+    mbed_i2s_init();    //DAC:44100Hz sampling ,16bit ,Stereo ,MCLK Disable, TLV320AIC23B=Master
+    aic23b_init();
+
+    
+    
+    pc.printf("CCLKCFG= %d \r\n",LPC_SC->CCLKCFG);
+    pc.printf("I2S Send start.\r\n");
+    led2=1;
+ 
+    //infp = NULL;
+    //
+    while(1){      
+        if ( NULL == (infp = fopen( "/sd/test.wav", "r" )) ) {
+            printf( "\r\nError: The message file cannot be accessed\r\n" );
+            return -1;
+        }
+        fseek(infp, 0L, SEEK_SET);
+        tick.attach_us(&dac_out, 250); //set 32kHz/8(word FIFO) sampling data
+        decode();
+    
+        fclose( infp );
+        infp = NULL;    
+        tick.detach();
+
+
+        
+    }
+}
+
+
+ 
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