Diff: I2SSlave.cpp

Revision:

5:9dfdde33be7e

Parent:

0:e62e06e11575

Child:

6:ed59a9124517

--- a/I2SSlave.cpp	Fri Aug 05 10:10:07 2011 +0000
+++ b/I2SSlave.cpp	Wed Jan 08 05:20:45 2014 +0000
@@ -72,7 +72,11 @@
 void I2SSlave::write(int* buffer, int from, int length){
     int to = from + length;
     for(int i = from; i < to; ++i){
+#if defined(TARGET_LPC1768) || defined(TARGET_LPC2368)
         LPC_I2S->I2STXFIFO = buffer[i];
+#elif defined(TARGET_LPC4088)
+        LPC_I2S->TXFIFO = buffer[i];
+#endif
     }
 }
 /******************************************************
@@ -84,6 +88,7 @@
  * Returns:         none
 ******************************************************/
 void I2SSlave::start(int mode){
+#if defined(TARGET_LPC1768) || defined(TARGET_LPC2368)
     switch(mode){
         case(0):
              LPC_I2S->I2SIRQ |= (0 << 0);           //disable receive interrupt
@@ -107,7 +112,32 @@
             break;
         default:
             break;
+#elif defined(TARGET_LPC4088)
+    switch(mode){
+        case(0):
+             LPC_I2S->IRQ |= (0 << 0);           //disable receive interrupt
+             LPC_I2S->IRQ |= (0 << 1);           //disable transmit interrupt
+             break;
+        case(1):
+            LPC_I2S->IRQ |= (0 << 0);            //disable receive interrupt
+            LPC_I2S->IRQ |= (1 << 1);            //enable transmit interrupt
+            LPC_I2S->IRQ |= (0 << 16);           //set I2STXFIFO depth to 0 words
+            break;
+        case(2):
+            LPC_I2S->IRQ |= (1 << 0);            //enable receive interrupt
+            LPC_I2S->IRQ |= (0 << 1);            //disable transmit interrupt
+            LPC_I2S->IRQ |= (4 << 8);            //set I2SRXFIFO depth to 4 words
+            break;
+        case(3):
+            LPC_I2S->IRQ |= (1 << 0);            //enable receive interrupt
+            LPC_I2S->IRQ |= (4 << 8);            //set I2SRXFIFO depth to 4 words
+            LPC_I2S->IRQ |= (1 << 1);            //enable transmit interrupt
+            LPC_I2S->IRQ |= (0 << 16);           //set I2STXFIFO depth to 0 words
+            break;
+        default:
+            break;
     }
+#endif
     NVIC_SetPriority(I2S_IRQn, 0);
     NVIC_EnableIRQ(I2S_IRQn);                       //enable I2S interrupt in the NVIC 
 }
@@ -131,10 +161,17 @@
  * Returns:         none
 ******************************************************/
 void I2SSlave::read(void){
+#if defined(TARGET_LPC1768) || defined(TARGET_LPC2368)
     rxBuffer[0] = LPC_I2S->I2SRXFIFO;
     rxBuffer[1] = LPC_I2S->I2SRXFIFO;
     rxBuffer[2] = LPC_I2S->I2SRXFIFO;
     rxBuffer[3] = LPC_I2S->I2SRXFIFO;
+#elif defined(TARGET_LPC4088)
+    rxBuffer[0] = LPC_I2S->RXFIFO;
+    rxBuffer[1] = LPC_I2S->RXFIFO;
+    rxBuffer[2] = LPC_I2S->RXFIFO;
+    rxBuffer[3] = LPC_I2S->RXFIFO;
+#endif
 }
 /******************************************************
  * Function name:   status_()
@@ -145,7 +182,11 @@
  * Returns:         int
 ******************************************************/
 int I2SSlave::status(void){
+#if defined(TARGET_LPC1768) || defined(TARGET_LPC2368)
     return LPC_I2S->I2SSTATE;
+#elif defined(TARGET_LPC4088)
+    return LPC_I2S->STATE;
+#endif
 }
 //Private functions
 /******************************************************
@@ -162,6 +203,7 @@
     LPC_SC->PCONP |= (1 << 27);
     //configure input/output register
     format_(bit_, mode_);           
+#if defined(TARGET_LPC1768) || defined(TARGET_LPC2368)
     //set mbed as SLAVE  
     LPC_I2S->I2SDAO |= (1 << 5);
     LPC_I2S->I2SDAI |= (1 << 5);
@@ -180,6 +222,26 @@
     LPC_I2S->I2SDAO |= (0 << 4);          
     LPC_I2S->I2SDAI |= (0 << 4);
     LPC_I2S->I2SDAO |= (0 << 15);          
+#elif defined(TARGET_LPC4088)
+    //set mbed as SLAVE  
+    LPC_I2S->DAO |= (1 << 5);
+    LPC_I2S->DAI |= (1 << 5);
+    //clock mode
+    setClocks_(4);
+    //set slave mode
+    modeConfig_();
+    //set receiver mode
+    LPC_I2S->RXMODE |= (1 << 1);
+    //slave mode
+    LPC_I2S->TXRATE = 0;
+    LPC_I2S->RXRATE = 0;
+    //Start
+    LPC_I2S->DAO |= (0 << 3);          
+    LPC_I2S->DAI |= (0 << 3);
+    LPC_I2S->DAO |= (0 << 4);          
+    LPC_I2S->DAI |= (0 << 4);
+    LPC_I2S->DAO |= (0 << 15);          
+#endif
     return 0;
 }
 /******************************************************
@@ -191,6 +253,7 @@
  * Returns:         nothing
 ******************************************************/
 void I2SSlave::setClocks_(int divideBy){
+#if defined(TARGET_LPC1768) || defined(TARGET_LPC2368)
     switch(divideBy){
         case 1:
             LPC_SC->PCLKSEL1 |= (1 << 22); 
@@ -211,6 +274,28 @@
         default:
             break;
     }
+#elif defined(TARGET_LPC4088)
+    switch(divideBy){
+        case 1:
+            LPC_SC->PCLKSEL |= (1 << 22); 
+            LPC_SC->PCLKSEL |= (0 << 23);     
+            break;
+        case 2:
+            LPC_SC->PCLKSEL |= (0 << 22);
+            LPC_SC->PCLKSEL |= (1 << 23);
+            break;
+        case 4:
+            LPC_SC->PCLKSEL |= (0 << 22);
+            LPC_SC->PCLKSEL |= (0 << 23);
+            break;
+        case 8:
+            LPC_SC->PCLKSEL |= (1 << 22);
+            LPC_SC->PCLKSEL |= (1 << 23);
+            break;
+        default:
+            break;
+    }
+#endif
 }
 /******************************************************
  * Function name:   setPins_()
@@ -221,6 +306,7 @@
  * Returns:         none
 ******************************************************/
 void I2SSlave::setPins_(PinName tx_sda, PinName tx_ws, PinName clk, PinName rx_sda, PinName rx_ws){
+#if defined(TARGET_LPC1768) || defined(TARGET_LPC2368)
     if(rx_ws == p29){
         LPC_PINCON->PINSEL0 |= (1 << 10);   //set p29 as receive word select line
     } else {
@@ -235,6 +321,23 @@
     LPC_PINCON->PINSEL0 |= (1 << 16);       //set p6 as word select line (only one of these)   
     LPC_PINCON->PINSEL0 |= (1 << 18);       //set p5 as transmit serial data line (only one of these)
     LPC_PINCON->PINSEL0 |= (0 << 8);        //clear rx_clk
+#elif defined(TARGET_LPC4088)
+    if(rx_ws == p33){
+        LPC_IOCON->P0_5  = (LPC_IOCON->P0_5  & ~7) | 1;   //set p29 as receive word select line
+    } else {
+        LPC_IOCON->P0_24 = (LPC_IOCON->P0_24 & ~7) | 2;   //set p16 as receive word select line
+    }
+    if(rx_sda == p14){
+        LPC_IOCON->P0_6  = (LPC_IOCON->P0_6  & ~7) | 1;   //set p14 as receive serial data line
+    } else {
+        LPC_IOCON->P0_25 = (LPC_IOCON->P0_25 & ~7) | 2;   //set p17 as receive serial data line
+    }
+    LPC_IOCON->P0_7  = (LPC_IOCON->P0_7  & ~7) | 1;       //set p13 as transmit clock line (only one of these)    
+    LPC_IOCON->P0_8  = (LPC_IOCON->P0_8  & ~7) | 1;       //set p6 as word select line (only one of these)   
+    LPC_IOCON->P0_9  = (LPC_IOCON->P0_9  & ~7) | 1;       //set p5 as transmit serial data line (only one of these)
+    LPC_IOCON->P0_23 = (LPC_IOCON->P0_4  & ~7);        //clear rx_clk
+    LPC_IOCON->P0_23 = (LPC_IOCON->P0_23 & ~7);        //clear rx_clk
+#endif
 }
 /******************************************************
  * Function name:   format_()
@@ -246,6 +349,7 @@
 ******************************************************/
 void I2SSlave::format_(int bit, bool mode){
     uint32_t bps= ((bit+1)*8)-1;
+#if defined(TARGET_LPC1768) || defined(TARGET_LPC2368)
     LPC_I2S->I2SDAO &= (0x00 << 6);
     LPC_I2S->I2SDAO |= (bps << 6);
     //set bit length
@@ -295,6 +399,57 @@
     } else {
         LPC_I2S->I2SDAI |= (1 << 2);
     }
+#elif defined(TARGET_LPC4088)
+    LPC_I2S->DAO &= (0x00 << 6);
+    LPC_I2S->DAO |= (bps << 6);
+    //set bit length
+    switch(bit){
+        case 8:
+            LPC_I2S->DAO &= 0xfffffffc;
+            break;
+        case 16:
+            LPC_I2S->DAO &= (0 << 1);
+            LPC_I2S->DAO |= (1 << 0);           
+            break;
+        case 32:
+            LPC_I2S->DAO &= (0 << 1);
+            LPC_I2S->DAO |= (3 << 0);
+            break;
+        default:
+            break;
+    }
+    //set audio mode
+    if(mode == STEREO){
+        LPC_I2S->DAO |= (0 << 2);
+    } else {
+        LPC_I2S->DAO |= (1 << 2);
+    }
+    //set transmitter and receiver setting to be the same
+    LPC_I2S->DAI &= (0x00 << 6);
+    LPC_I2S->DAI |= (bps << 6);
+    //set bit length
+    switch(bit){
+        case 8:
+            LPC_I2S->DAI &= 0xfffffffc;
+            break;
+        case 16:
+            LPC_I2S->DAI &= (0 << 1);
+            LPC_I2S->DAI |= (1 << 0);
+            break;
+        case 32:
+            LPC_I2S->DAI &= (0 << 1);
+            LPC_I2S->DAI |= (3 << 0);
+            break;
+        default:
+            break;
+    }
+    //set audio mode
+    if(mode == STEREO){
+        LPC_I2S->DAI |= (0 << 2);
+    } else {
+        LPC_I2S->DAI |= (1 << 2);
+    }
+#endif
 }
 /******************************************************
  * Function name:   modeConfig_()
@@ -305,8 +460,13 @@
  * Returns:         none
 ******************************************************/
 void I2SSlave::modeConfig_(void){
+#if defined(TARGET_LPC1768) || defined(TARGET_LPC2368)
     LPC_I2S->I2STXMODE |= (0x0 << 0);
     LPC_I2S->I2SRXMODE |= (0x0 << 0);
+#elif defined(TARGET_LPC4088)
+    LPC_I2S->TXMODE |= (0x0 << 0);
+    LPC_I2S->RXMODE |= (0x0 << 0);
+#endif
 }
 /******************************************************
  * Function name:   storePins_()