Diff: SAA1064.cpp

Revision:

1:e6f764285b44

Parent:

0:8b1f83a2ae0a

diff -r 8b1f83a2ae0a -r e6f764285b44 SAA1064.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/SAA1064.cpp	Mon Apr 20 07:36:41 2015 +0000
@@ -0,0 +1,82 @@
+/* SAA1064 4 Digit Library
+ * Copyright (c) 2015 Marcel (mc-b) Bernet
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "mbed.h"
+#include "SAA1064.h"
+
+SAA1064::SAA1064( PinName sda, PinName scl, uint8_t deviceAddress )
+{
+    i2c = new I2C( sda, scl );
+    slaveAddress = deviceAddress;
+    init();
+}
+
+
+SAA1064::SAA1064( I2C *i2c, uint8_t deviceAddress )
+{
+    this->i2c = i2c;
+    slaveAddress = deviceAddress;
+    init();
+}
+
+/** Write digits
+*
+* @param digit1  LED segment pattern for digit1 (MSB)
+* @param digit2  LED segment pattern for digit2
+* @param digit3  LED segment pattern for digit3
+* @param digit4  LED segment pattern for digit4 (LSB)
+*/
+void SAA1064::write( uint8_t digit1, uint8_t digit2, uint8_t digit3, uint8_t digit4 )
+{
+    digit1 = SAA1064_SEGM[digit1];
+    digit2 = SAA1064_SEGM[digit2];
+    digit3 = SAA1064_SEGM[digit3];
+    digit4 = SAA1064_SEGM[digit4];
+
+    data[0] = 1;
+    data[1] = ((digit4<<4) & 0xF0) | (digit2 & 0x0F);
+    data[2] = ((digit3<<4) & 0xF0) | (digit1 & 0x0F);
+    data[3] = ((digit2>>4) & 0x0F) | (digit4 & 0xF0);
+    data[4] = ((digit1>>4) & 0x0F) | (digit3 & 0xF0);
+    i2c->write( slaveAddress, (char*) data, 5 );
+}
+
+/** Write Integer
+*
+* @param value     integer value to display, valid range -999...9999
+*/
+void SAA1064::writeInt( int value )
+{
+    write( value / 1000, (value % 1000) / 100, (value % 100) / 10, value % 10 );
+}
+
+/** Init I2C bus 
+*/
+void SAA1064::init( void )
+{
+    // init
+    data[0] = 0x00;
+    data[1] = 0x47;
+    i2c->write( slaveAddress, (char*) data, 2 );
+
+    // blank display
+    data[0] = 1;
+    data[1] = 0;
+    data[2] = 0;
+    data[3] = 0;
+    data[4] = 0;
+    i2c->write( slaveAddress, (char*) data, 5 );
+}
\ No newline at end of file