Revision 0:cba98a2b97d2, committed 2016-02-28

Comitter:

lucasmoraeseng

Date:

Sun Feb 28 21:54:51 2016 +0000

Commit message:

Library to use MAX7219 with Leds

Changed in this revision

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/MAX7219.cpp	Sun Feb 28 21:54:51 2016 +0000
@@ -0,0 +1,146 @@
+/* Copyright (c) 2010-2011 mbed.org, MIT License
+*
+* Permission is hereby granted, free of charge, to any person obtaining a copy of this software
+* and associated documentation files (the "Software"), to deal in the Software without
+* restriction, including without limitation the rights to use, copy, modify, merge, publish,
+* distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the
+* Software is furnished to do so, subject to the following conditions:
+*
+* The above copyright notice and this permission notice shall be included in all copies or
+* substantial portions of the Software.
+*
+* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
+* BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+*/
+
+#include "MAX7219.h"
+
+// define max7219 registers
+#define max7219_reg_noop         0x00
+#define max7219_reg_digit0       0x01
+#define max7219_reg_digit1       0x02
+#define max7219_reg_digit2       0x03
+#define max7219_reg_digit3       0x04
+#define max7219_reg_digit4       0x05
+#define max7219_reg_digit5       0x06
+#define max7219_reg_digit6       0x07
+#define max7219_reg_digit7       0x08
+#define max7219_reg_decodeMode   0x09
+#define max7219_reg_intensity    0x0a
+#define max7219_reg_scanLimit    0x0b
+#define max7219_reg_shutdown     0x0c
+#define max7219_reg_displayTest  0x0f
+
+#define Max7219_Time        125
+
+#ifndef MaxInUse
+#define MaxInUse 1
+#endif
+
+
+DigitalOut DIN(PTA7);
+DigitalOut CLK(PTB0);
+DigitalOut LOAD(PTA5);
+
+MAX7219::MAX7219() {
+    DIN=0;
+    CLK=0;
+    LOAD = 1;    
+}
+
+MAX7219::~MAX7219() { }
+
+void MAX7219::putByte(uint8_t data) {
+  uint8_t i = 8;
+  uint8_t mask;
+  
+  while(i > 0) {
+    mask = 0x01 << (i - 1);      // get bitmask
+    CLK = 0;   					 // tick
+    if (data & mask){            // choose bit
+      DIN = 1;					 // send 1
+    }else{
+      DIN = 0;					 // send 0
+    }
+    CLK = 1;   					 // tock
+    --i;                         // move to lesser bit
+    //wait_us(Max7219_Time);
+  }
+}
+
+void MAX7219::Init(uint8_t ND,uint8_t DM,uint8_t IN)
+{
+	uint8_t e;
+	//initiation of the max 7219
+  	maxAll(max7219_reg_scanLimit, ND);      
+  	maxAll(max7219_reg_decodeMode, DM);  // using an led matrix (not digits)
+  	maxAll(max7219_reg_shutdown, 0x01);    // not in shutdown mode
+  	maxAll(max7219_reg_displayTest, 0x00); // no display test
+   	for (e=1; e<=8; e++) {    // empty registers, turn all LEDs off 
+    	maxAll(e,0);
+  	}
+  	maxAll(max7219_reg_intensity, 0x0f & IN);    // the first 0x0f is the value you can set
+                                                  // range: 0x00 to 0x0f
+	
+}
+
+void MAX7219::maxSingle( uint8_t reg, uint8_t col) {    
+//maxSingle is the "easy"  function to use for a single max7219
+
+  LOAD = 0;                      // begin     
+  putByte(reg);                  // specify register
+  putByte(col);					 // put data   
+  LOAD = 0;                      // and load da stuff
+  LOAD = 1;                      
+}
+
+void MAX7219::maxAll(uint8_t reg, uint8_t col) {    // initialize  all  MAX7219's in the system
+  uint8_t c = 0;
+  LOAD = 0;                      // begin     
+  for ( c =1; c<= MaxInUse; c++) {
+  putByte(reg);  // specify register
+  putByte(col);  // put data
+    }
+  LOAD = 0;                      
+  LOAD = 1;                      
+}
+
+void MAX7219::maxOne(uint8_t maxNr, uint8_t reg, uint8_t col) {    
+//maxOne is for addressing different MAX7219's, 
+//while having a couple of them cascaded
+
+  uint8_t c = 0;
+  LOAD = 0;                      // begin     
+
+  for ( c = MaxInUse; c > maxNr; c--) {
+    putByte(0);    // means no operation
+    putByte(0);    // means no operation
+  }
+
+  putByte(reg);  // specify register
+  putByte(col);//((data & 0x01) * 256) + data >> 1); // put data 
+
+  for ( c =maxNr-1; c >= 1; c--) {
+    putByte(0);    // means no operation
+    putByte(0);    // means no operation
+  }
+
+  LOAD = 0;                      // and load da stuff
+  LOAD = 1;                      
+}
+
+void MAX7219::Power(uint8_t Mode)
+{
+  	if(Mode>=1){  	
+  		maxAll(max7219_reg_shutdown, 0x01);    // not in shutdown mode
+	}
+	else{
+  		maxAll(max7219_reg_shutdown, 0x00);    // in shutdown mode
+  	}			
+}
+	
+
+

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/MAX7219.h	Sun Feb 28 21:54:51 2016 +0000
@@ -0,0 +1,81 @@
+/* Copyright (c) 2010-2011 mbed.org, MIT License
+*
+* Permission is hereby granted, free of charge, to any person obtaining a copy of this software
+* and associated documentation files (the "Software"), to deal in the Software without
+* restriction, including without limitation the rights to use, copy, modify, merge, publish,
+* distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the
+* Software is furnished to do so, subject to the following conditions:
+*
+* The above copyright notice and this permission notice shall be included in all copies or
+* substantial portions of the Software.
+*
+* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
+* BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+*/
+
+#ifndef MAX7219_H
+#define MAX7219_H
+
+#include "mbed.h"
+
+/**
+* MMA8451Q accelerometer example
+*
+* @code
+* #include "mbed.h"
+* #include "MMA8451Q.h"
+* 
+* #define MMA8451_I2C_ADDRESS (0x1d<<1)
+* 
+* int main(void) {
+* 
+* MMA8451Q acc(P_E25, P_E24, MMA8451_I2C_ADDRESS);
+* PwmOut rled(LED_RED);
+* PwmOut gled(LED_GREEN);
+* PwmOut bled(LED_BLUE);
+* 
+*     while (true) {       
+*         rled = 1.0 - abs(acc.getAccX());
+*         gled = 1.0 - abs(acc.getAccY());
+*         bled = 1.0 - abs(acc.getAccZ());
+*         wait(0.1);
+*     }
+* }
+* @endcode
+*/
+class MAX7219
+{
+public:
+  /**
+  * MMA8451Q constructor
+  *
+  * @param sda SDA pin
+  * @param sdl SCL pin
+  * @param addr addr of the I2C peripheral
+  */
+  MAX7219();
+
+  /**
+  * MMA8451Q destructor
+  */
+  ~MAX7219();
+  
+  void maxSingle( uint8_t reg, uint8_t col);
+  
+  void Init(uint8_t ND,uint8_t DM,uint8_t IN);
+  
+  void maxAll(uint8_t reg, uint8_t col);
+  
+  void maxOne(uint8_t maxNr, uint8_t reg, uint8_t col);
+  
+  void Power(uint8_t Mode);
+  
+private:
+	void putByte(uint8_t data);
+
+};
+
+#endif