Diff: ShiftOut.cpp

Revision:

0:e576e892f0ca

Child:

3:a0df8989ffa2

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ShiftOut.cpp	Fri Dec 25 11:59:15 2015 +0000
@@ -0,0 +1,105 @@
+#include "mbed.h"
+#include "ShiftOut.h"
+
+
+#define SET_LATCH() (LATCH = 0)
+#define RESET_LATCH() (LATCH = 1)
+
+#define ENABLE_RESET() (RESET = 0)
+#define DISABLE_RESET() (RESET = 1)
+
+static char stateArr[8] = {0};
+
+ShiftOut::ShiftOut(PinName ser, PinName srclk, PinName rclk, 
+                PinName oe, PinName reset) : DSERIAL(ser), LATCH(oe), SRCLK(srclk), RCLK(rclk), RESET(reset)
+{
+    writeByte(0x00); // Reset the values of the registers to 0  
+    if(RESET != NC){  
+    DISABLE_RESET();
+    }
+}
+
+//Pulses the register
+void ShiftOut::updateRegister(){
+    SRCLK = 1;
+    wait_us(2);
+    SRCLK = 0;    
+}
+
+void ShiftOut::updateOutput(){
+    RCLK = 1;
+    wait_us(2);
+    RCLK = 0;    
+}
+
+void ShiftOut::writeByte(unsigned char byte){
+    for(int i = 0; i<8; i++){
+        DSERIAL = (byte & 0x01<<i)>>i;
+        updateRegister();    
+    } 
+    updateOutput();   
+}
+
+void ShiftOut::writeBit(unsigned char bit){
+    DSERIAL = bit & 0x01;
+    updateRegister();
+    updateOutput();
+    } 
+    
+void ShiftOut::animate(int arr[][8], int lines, int delay_ms){
+    for(int i = 0; i < lines; i++){
+        for(int j = 0; j < 8; j++){
+           writeBit(arr[i][j]); 
+        } 
+        wait_ms(delay_ms);   
+    }
+}
+
+void ShiftOut::animationExample(){
+int strobe[][8]= {{1,0,0,0,0,0,0,0},
+                  {0,1,0,0,0,0,0,0},
+                  {0,0,1,0,0,0,0,0},
+                  {0,0,0,1,0,0,0,0},
+                  {0,0,0,0,1,0,0,0},
+                  {0,0,0,0,0,1,0,0},
+                  {0,0,0,0,0,0,1,0},
+                  {0,0,0,0,0,0,0,1}};
+                     
+int nightrider[18][8]= {{1,0,0,0,0,0,0,0},
+                        {1,1,0,0,0,0,0,0},
+                        {1,1,1,0,0,0,0,0},
+                        {0,1,1,1,0,0,0,0},
+                        {0,0,1,1,1,0,0,0},
+                        {0,0,0,1,1,1,0,0},
+                        {0,0,0,0,1,1,1,0},
+                        {0,0,0,0,0,1,1,1},
+                        {0,0,0,0,0,0,1,1},
+                        {0,0,0,0,0,0,0,1},
+                        {0,0,0,0,0,0,1,1},
+                        {0,0,0,0,0,1,1,1},
+                        {0,0,0,0,1,1,1,0},
+                        {0,0,0,1,1,1,0,0},
+                        {0,0,1,1,1,0,0,0},
+                        {0,1,1,1,0,0,0,0},
+                        {1,1,1,0,0,0,0,0},
+                        {1,1,0,0,0,0,0,0}};
+                        
+        animate(nightrider, 18, 50);
+        wait(1);
+        animate(strobe, 8, 200);
+    }
+    
+void ShiftOut::writeBitAtPos(unsigned char pin, bool state){
+  
+    
+    if(pin < 8){
+        stateArr[pin] = state;        
+    }
+    writeArray(stateArr);
+}
+
+void ShiftOut::writeArray(char arr[8]){
+    for(int i = 7; i >= 0; i--) {
+        writeBit(arr[i]);
+    }       
+}
\ No newline at end of file