Diff: PCF8576.cpp

Revision:

0:e62c6477b73b

diff -r 000000000000 -r e62c6477b73b PCF8576.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/PCF8576.cpp	Mon Mar 28 12:40:44 2016 +0000
@@ -0,0 +1,119 @@
+/* Copyright (c) 2016 ARM Ltd., 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 "PCF8576.h"
+
+PCF8576::PCF8576(PinName sda, PinName scl, int addr) : m_i2c(sda, scl), m_addr(addr)
+{
+    initialize();
+}
+ 
+PCF8576::PCF8576(I2C &i2c_obj, int addr) : m_i2c(i2c_obj), m_addr(addr)
+{
+    initialize();
+}
+ 
+PCF8576::~PCF8576()
+{
+}
+
+void PCF8576::initialize()
+{
+    m_i2c.frequency(200000);
+
+    for(uint32_t i = 0; i < 14; i++) {
+        m_lcd_buf[i] = 0;
+    }
+    
+    m_C5_mask = m_C6_mask = 0;
+
+    m_lcd_buf[0]      =  PCF8576_CMD_MODE_SET
+                       | (0x0 << 0)          // 1:4 multiplex
+                       | (0   << 2)          // LCD 1/3 bias
+                       | (1   << 3)          // enable display
+                       | (1   << 7);         // another command to follow
+
+    m_lcd_buf[1]      =  PCF8576_CMD_BINK
+                       | (0x0 << 0)          // blinking off
+                       | (0   << 2)          // blink mode normal
+                       | (0   << 7);         // last command
+
+    m_i2c.write(PCF8576_DEFAULT_SLAVE_ADDRESS, m_lcd_buf, 14);
+
+}
+
+void PCF8576::icon(uint32_t count)
+{
+    if (count & 0x08) {
+        m_C5_mask     |= 0x01;
+        m_lcd_buf[11] |= 0x01;
+    } else {
+        m_C5_mask     &= ~0x01;
+        m_lcd_buf[11] &= ~0x01;
+    }
+
+    if (count & 0x04) {
+        m_C5_mask     |= 0x02;
+        m_lcd_buf[11] |= 0x02;
+    } else {
+        m_C5_mask     &= ~0x02;
+        m_lcd_buf[11] &= ~0x02;
+    }
+
+    if (count & 0x02) {
+        m_C6_mask     |= 0x01;
+        m_lcd_buf[13] |= 0x01;
+    } else {
+        m_C6_mask     &= ~0x01;
+        m_lcd_buf[13] &= ~0x01;
+    }
+
+    if (count & 0x01) {
+        m_C6_mask     |= 0x02;
+        m_lcd_buf[13] |= 0x02;
+    } else {
+        m_C6_mask     &= ~0x02;
+        m_lcd_buf[13] &= ~0x02;
+    }
+    m_i2c.write(PCF8576_DEFAULT_SLAVE_ADDRESS, m_lcd_buf, 14);
+
+}
+
+
+void PCF8576::print(char *str)
+{
+    uint32_t len = strlen(str);
+    if (len == 0)
+        return;
+    if (len > 6)
+        len = 6;
+
+    m_lcd_buf[0] = PCF8576_CMD_DEVICE_SEL | (1 << 7);
+    m_lcd_buf[1] = PCF8576_CMD_LOAD_DATA;
+
+    for(uint32_t i = 0; i < len; i++) {
+        m_lcd_buf[(i*2) + 2] = (char)(FontMatrix[(*str - ' ')] & 0xFF);
+        m_lcd_buf[(i*2) + 3] = (char)(FontMatrix[(*str - ' ')] >> 8);
+        str++;
+    }
+
+    m_lcd_buf[11] |= m_C5_mask;
+    m_lcd_buf[13] |= m_C6_mask;
+
+    m_i2c.write(PCF8576_DEFAULT_SLAVE_ADDRESS, m_lcd_buf, 2 + (len*2));
+}