Diff: main.cpp

Revision:

2:b28027b9c099

Parent:

1:3e3dded8192f

Child:

3:eb5b87baf6cf

diff -r 3e3dded8192f -r b28027b9c099 main.cpp
--- a/main.cpp	Mon Oct 30 12:09:10 2017 +0000
+++ b/main.cpp	Wed Nov 01 11:53:16 2017 +0000
@@ -12,9 +12,9 @@
 #include "mbed.h"
 #include "acd52832_bsp.h"
 
-#define MY_BUF_SIZE     13*8*2      
+#define MY_BUF_SIZE     13*8
 #define LANC_H      0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF    /* 13 B */
-#define LANC_H_L    0xAA, 0xAA, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0xFF, 0x00, 0x00, 0x00, 0xAA    /* 13 B */
+#define LANC_H_L    0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xFF    /* 13 B */
 #define LANC_L      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00    /* 13 B */
 
 /*
@@ -24,50 +24,85 @@
 #define REC_CMD_1           (0xE7)      // 0xE7  or 0x18
 #define REC_CMD_2           (0xCC)      // 0xCC  or 0x33
 
-#define LANC_COMMAND_PIN    (p26)   // Pin connected to Tr to pull lanc bus down/up     2/26
-#define LANC_PIN            (p25)   // Lanc bus pin (to scan for START/STOP bits)        3/25
+#define LANC_COMMAND_PIN    (p2)   // Pin connected to Tr to pull lanc bus down/up     2/26
+#define LANC_PIN            (p3)   // Lanc bus pin (to scan for START/STOP bits)        3/25
 
 DigitalOut led(p22);
-//uint8_t my_tx_buf[MY_BUF_SIZE] = {LANC_H,LANC_L,LANC_L,LANC_H, LANC_H,LANC_L,LANC_L,LANC_L,  LANC_L,LANC_L,LANC_H,LANC_H,LANC_L,LANC_L,LANC_H,LANC_L};
-//uint8_t my_tx_buf[MY_BUF_SIZE] = {LANC_H_L,LANC_H_L,LANC_H,LANC_L, LANC_H,LANC_L,LANC_H,LANC_L,  LANC_H,LANC_L,LANC_H,LANC_L,LANC_H,LANC_L,LANC_L,LANC_H_L};
-uint8_t my_tx_buf[4] __attribute__ ((aligned (32))) = {0x01, 0x00, 0x00, 0x90};
-uint32_t *adrMyTxBuf = (uint32_t*)my_tx_buf;
+DigitalOut alive(p24);
+
+uint8_t normalCommand[MY_BUF_SIZE] __attribute__ ((aligned (32))) = {LANC_L,LANC_L,LANC_L,LANC_H, LANC_H,LANC_L,LANC_L,LANC_L};
+//uint8_t startStop[MY_BUF_SIZE] __attribute__ ((aligned (32))) = {LANC_L,LANC_L,LANC_H,LANC_H,LANC_L,LANC_L,LANC_H,LANC_H_L};
+//uint8_t normalCommand[MY_BUF_SIZE] __attribute__ ((aligned (32))) = {LANC_L,LANC_H,LANC_H,LANC_L, LANC_L,LANC_H,LANC_H,LANC_H};
+uint8_t startStop[MY_BUF_SIZE] __attribute__ ((aligned (32))) = {LANC_H,LANC_H,LANC_L,LANC_L,LANC_H,LANC_H,LANC_L,LANC_L};
 
-uint8_t empty_tx_buf[MY_BUF_SIZE] = {LANC_L,LANC_L,LANC_L,LANC_L, LANC_L,LANC_L,LANC_L,LANC_L, LANC_L,LANC_L,LANC_L,LANC_L, LANC_L,LANC_L,LANC_L,LANC_L};
-uint8_t my_rx_buf[10] = {};
-uint8_t flag = 0;
+uint32_t *normalCmdAddr = (uint32_t*)normalCommand;
+uint32_t *startStopAddr = (uint32_t*)startStop;
+
+uint8_t firstInt = 1;
+uint8_t flag = 0;   
+uint8_t state = 0;  /* 0 -> Send command type, 1-> send command */
 InterruptIn button(LANC_PIN);
+Timer lancTimer;
+Timer frameTimer;
 
 
-void startLanc(){
-        NRF_I2S->EVENTS_TXPTRUPD = 0;
+void sendCommand(void){
+    static int timePassed_ms = 0;
+    static int lastIntTime_ms = 0;
     
-        NRF_I2S->ENABLE = 1;
-    //NRF_I2S->TXD.PTR = (uint32_t)my_tx_buf;
+    /*
+     *  Na prvi interrupt pokreni frameTimer. 
+     *  Na svaki interrupt (falling edge na Lanc busu) izmjeri vrijeme od zadnjeg eventa
+     *  Ako je to vrijeme > 5ms, onda je upravo taj prekid izazvao start bit novog framea
+     *  U tom slučaju, kreni s donjim kodom, inaće nemoj ništa slati
+     */
+    if(firstInt){
+        firstInt = 0;
+        frameTimer.start();
+    }
+    
+    lastIntTime_ms = frameTimer.read_ms() - lastIntTime_ms;
+    frameTimer.reset();
     
-    NRF_I2S->CONFIG.TXEN = 1;       // Enable transmission
-    NRF_I2S->TASKS_START = 1;
-        //NRF_I2S->TXD.PTR = (uint32_t)my_tx_buf;
-    flag = 1;
-}
-
-void sendCommand(void){
-    //lancTicker.attach_us(startLanc, 10);
-    //startLanc();
-        NRF_I2S->EVENTS_TXPTRUPD = 0;
-        NRF_I2S->ENABLE = 1;
-    //NRF_I2S->TXD.PTR = (uint32_t)my_tx_buf;
-    
-    //NRF_I2S->CONFIG.TXEN = 1;       // Enable transmission
-    NRF_I2S->TASKS_START = 1;
-        //NRF_I2S->TXD.PTR = (uint32_t)my_tx_buf;
-    flag = 1;
+    if(lastIntTime_ms > 15){
+        state = 0;
+        if(!state){
+            lancTimer.start();
+        }
+        state++;
+        
+        if(state == 1){
+            NRF_I2S->TXD.PTR = (uint32_t)normalCmdAddr;
+        }
+        else if(state == 2){
+            NRF_I2S->TXD.PTR = (uint32_t)startStopAddr;
+        }
+        
+        if(state<=2){
+            __disable_irq();
+            // First or second start bit
+            wait_us(60);    // Small delay for first bit after start bit
+            NRF_I2S->EVENTS_TXPTRUPD = 0;
+            NRF_I2S->ENABLE = 1;
+            NRF_I2S->TASKS_START = 1;
+            flag = 1;
+        }
+        else{
+            timePassed_ms = lancTimer.read_ms();
+            if(timePassed_ms > 8){
+                lancTimer.reset();
+                timePassed_ms = 0;
+                //state = 0;
+            }
+        }
+    }
 }
 
 
 
 int main(void){
     led = 1;
+    alive = 0;
     
     NRF_I2S->CONFIG.RXEN = 0;       // Disable reception
     NRF_I2S->CONFIG.MCKEN = 1;      // Enable MCK generator
@@ -91,35 +126,40 @@
     NRF_I2S->PSEL.MCK = 0x80000000;         // MCK disconnected
     NRF_I2S->PSEL.SDIN = 0x80000000;        // SDIN disconnected
     
-    NRF_I2S->TXD.PTR = (uint32_t)adrMyTxBuf;
-    //NRF_I2S->RXTXD.MAXCNT = MY_BUF_SIZE/4;  // Div with 4 cuz that's number of 32 bit words
-    //NRF_I2S->RXTXD.MAXCNT = 52;
-        NRF_I2S->RXTXD.MAXCNT = 1;
+    NRF_I2S->TXD.PTR = (uint32_t)normalCmdAddr;
+    NRF_I2S->RXTXD.MAXCNT = MY_BUF_SIZE/4;  // Div with 4 cuz that's number of 32 bit words
+    
+        
         
     //NRF_I2S->ENABLE = 1;
     //NRF_I2S->TASKS_START = 1;
     
     button.fall(sendCommand);
     while(1){
-        if(flag){
-                        //NRF_I2S->TXD.PTR = (uint32_t)(my_tx_buf);
+        if(flag){              
+            /*
+            if(state == 1){
+                NRF_I2S->TXD.PTR = (uint32_t)startStopAddr;
+            }
+            else if(state == 2){
+                NRF_I2S->TXD.PTR = (uint32_t)normalCmdAddr;
+            }
+            */
+            
             led = 0;
             while(!NRF_I2S->EVENTS_TXPTRUPD);    // Wait for the data to be send
             NRF_I2S->EVENTS_TXPTRUPD = 0;
             while(!NRF_I2S->EVENTS_TXPTRUPD);    // Wait for the data to be send
-            NRF_I2S->EVENTS_TXPTRUPD = 0;
-            //NRF_I2S->TXD.PTR = (uint32_t)empty_tx_buf;
-            //wait_us(2000);
+            NRF_I2S->EVENTS_TXPTRUPD = 0; 
             
-            //NRF_I2S->TASKS_STOP = 1;
-            //while(!NRF_I2S->EVENTS_STOPPED);
-            //NRF_I2S->EVENTS_STOPPED = 0;
+            NRF_I2S->TASKS_STOP = 1;
+            while(!NRF_I2S->EVENTS_STOPPED);
             NRF_I2S->ENABLE = 0;
-            //NRF_I2S->TXD.PTR = (uint32_t)my_tx_buf;
             flag = 0;
             led = 1;
+            __enable_irq();
         }
-    }   
+    }
 }