Diff: main.cpp

Revision:

0:d616ca59aad8

Child:

1:3e3dded8192f

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Fri Oct 13 16:34:29 2017 +0000
@@ -0,0 +1,80 @@
+/*
+ * Example to demonstrate usage of the nrf52's I2S interface
+ *
+ * Made by Jurica Resetar @ aconno
+ * jurica_resetar@yahoo.com
+ * More info @ aconno.de
+ *
+ * All rights reserved
+ *
+ */
+ 
+#include "mbed.h"
+#include "acd52832_bsp.h"
+
+#define MY_BUF_SIZE     3*8*2
+#define LANC_H      0xFFFF, 0xFFFF, 0xFFFF
+#define LANC_L      0x0000, 0x0000, 0x0000
+
+/*
+ *  Bitovi na I2S bus idu od MSBa do LSBa
+ */
+
+#define REC_CMD_1           (0x18)      // 0xE7  or 0x18
+#define REC_CMD_2           (0x33)      // 0xCC  or 0x33
+
+uint16_t my_tx_buf[MY_BUF_SIZE] = {LANC_L,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_H};
+uint8_t my_rx_buf[10] = {};
+uint8_t flag = 0;
+InterruptIn button(PIN_BUTTON);
+
+void sendCommand(void){
+    NRF_I2S->TASKS_START = 1;
+    while(!NRF_I2S->EVENTS_TXPTRUPD);    // Wait for the data to be send
+    NRF_I2S->EVENTS_TXPTRUPD = 0;
+    flag = 1;
+}
+
+int main(void){
+    NRF_I2S->CONFIG.RXEN = 0;       // Disable reception
+    NRF_I2S->CONFIG.TXEN = 1;       // Enable transmission
+    NRF_I2S->CONFIG.MCKEN = 1;      // Enable MCK generator
+    
+    //NRF_I2S->CONFIG.MCKFREQ = 0x04100000; // DIV 63
+    //NRF_I2S->CONFIG.RATIO = 0;        // Ratio = 32x
+    NRF_I2S->CONFIG.MCKFREQ = 0x08200000; // DIV 31
+    NRF_I2S->CONFIG.RATIO = 2;          // Ratio = 64x
+    
+    NRF_I2S->CONFIG.SWIDTH = 1;         // Sample width = 16 bit
+    NRF_I2S->CONFIG.ALIGN = 1;          // Alignment = Right
+    NRF_I2S->CONFIG.FORMAT = 0;         // Format = I2S
+    NRF_I2S->CONFIG.CHANNELS = 0;       // Use stereo
+    
+    
+    // In debug mode
+    NRF_I2S->PSEL.LRCK = 26;            // LRCK routed to pin 26
+    NRF_I2S->PSEL.SDOUT = 28;           // SDOUT routed to pin 28
+    NRF_I2S->PSEL.SCK = 30;             // SCK routed to pin 30
+    NRF_I2S->PSEL.MCK = 0x80000000;     // MCK disconnected
+    NRF_I2S->PSEL.SDIN = 0x80000000;    // SDIN disconnected
+    
+    NRF_I2S->TXD.PTR = (uint32_t)my_tx_buf;
+    NRF_I2S->RXD.PTR = (uint32_t)my_rx_buf;
+    NRF_I2S->RXTXD.MAXCNT = MY_BUF_SIZE/2;      // Ajde ustanovi zašto pobogu /2
+    
+    NRF_I2S->ENABLE = 1;
+    //NRF_I2S->TASKS_START = 1;
+    
+    button.rise(sendCommand);
+    while(1){
+        if(flag){
+            wait_ms(50);
+            NRF_I2S->TASKS_STOP = 1;
+            while(!NRF_I2S->EVENTS_STOPPED);
+            NRF_I2S->EVENTS_STOPPED = 0;
+            flag = 0;
+        }
+    }   
+}
+
+