Toyomasa Watarai / PCF8576

NXP PCF8576 Universal LCD driver for low multiplex rates + GH08172 LCD library

Dependents:   PCF8576_GH08172_test

PCF8576.cpp@1:427ffdda29a3, 2016-03-28 (annotated)

Committer:
MACRUM
Date:
Mon Mar 28 12:47:02 2016 +0000
Revision:
1:427ffdda29a3
Parent:
0:e62c6477b73b 
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MACRUM 0:e62c6477b73b 1 /* Copyright (c) 2016 ARM Ltd., MIT License
MACRUM 0:e62c6477b73b 2 *
MACRUM 0:e62c6477b73b 3 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
MACRUM 0:e62c6477b73b 4 * and associated documentation files (the "Software"), to deal in the Software without
MACRUM 0:e62c6477b73b 5 * restriction, including without limitation the rights to use, copy, modify, merge, publish,
MACRUM 0:e62c6477b73b 6 * distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the
MACRUM 0:e62c6477b73b 7 * Software is furnished to do so, subject to the following conditions:
MACRUM 0:e62c6477b73b 8 *
MACRUM 0:e62c6477b73b 9 * The above copyright notice and this permission notice shall be included in all copies or
MACRUM 0:e62c6477b73b 10 * substantial portions of the Software.
MACRUM 0:e62c6477b73b 11 *
MACRUM 0:e62c6477b73b 12 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
MACRUM 0:e62c6477b73b 13 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
MACRUM 0:e62c6477b73b 14 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
MACRUM 0:e62c6477b73b 15 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
MACRUM 0:e62c6477b73b 16 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
MACRUM 0:e62c6477b73b 17 *
MACRUM 0:e62c6477b73b 18 */
MACRUM 0:e62c6477b73b 19 #include "PCF8576.h"
MACRUM 0:e62c6477b73b 20
MACRUM 0:e62c6477b73b 21 PCF8576::PCF8576(PinName sda, PinName scl, int addr) : m_i2c(sda, scl), m_addr(addr)
MACRUM 0:e62c6477b73b 22 {
MACRUM 0:e62c6477b73b 23 initialize();
MACRUM 0:e62c6477b73b 24 }
MACRUM 0:e62c6477b73b 25
MACRUM 0:e62c6477b73b 26 PCF8576::PCF8576(I2C &i2c_obj, int addr) : m_i2c(i2c_obj), m_addr(addr)
MACRUM 0:e62c6477b73b 27 {
MACRUM 0:e62c6477b73b 28 initialize();
MACRUM 0:e62c6477b73b 29 }
MACRUM 0:e62c6477b73b 30
MACRUM 0:e62c6477b73b 31 PCF8576::~PCF8576()
MACRUM 0:e62c6477b73b 32 {
MACRUM 0:e62c6477b73b 33 }
MACRUM 0:e62c6477b73b 34
MACRUM 0:e62c6477b73b 35 void PCF8576::initialize()
MACRUM 0:e62c6477b73b 36 {
MACRUM 0:e62c6477b73b 37 m_i2c.frequency(200000);
MACRUM 0:e62c6477b73b 38
MACRUM 0:e62c6477b73b 39 for(uint32_t i = 0; i < 14; i++) {
MACRUM 0:e62c6477b73b 40 m_lcd_buf[i] = 0;
MACRUM 0:e62c6477b73b 41 }
MACRUM 0:e62c6477b73b 42
MACRUM 0:e62c6477b73b 43 m_C5_mask = m_C6_mask = 0;
MACRUM 0:e62c6477b73b 44
MACRUM 0:e62c6477b73b 45 m_lcd_buf[0] = PCF8576_CMD_MODE_SET
MACRUM 0:e62c6477b73b 46 | (0x0 << 0) // 1:4 multiplex
MACRUM 0:e62c6477b73b 47 | (0 << 2) // LCD 1/3 bias
MACRUM 0:e62c6477b73b 48 | (1 << 3) // enable display
MACRUM 0:e62c6477b73b 49 | (1 << 7); // another command to follow
MACRUM 0:e62c6477b73b 50
MACRUM 0:e62c6477b73b 51 m_lcd_buf[1] = PCF8576_CMD_BINK
MACRUM 0:e62c6477b73b 52 | (0x0 << 0) // blinking off
MACRUM 0:e62c6477b73b 53 | (0 << 2) // blink mode normal
MACRUM 0:e62c6477b73b 54 | (0 << 7); // last command
MACRUM 0:e62c6477b73b 55
MACRUM 0:e62c6477b73b 56 m_i2c.write(PCF8576_DEFAULT_SLAVE_ADDRESS, m_lcd_buf, 14);
MACRUM 0:e62c6477b73b 57
MACRUM 0:e62c6477b73b 58 }
MACRUM 0:e62c6477b73b 59
MACRUM 0:e62c6477b73b 60 void PCF8576::icon(uint32_t count)
MACRUM 0:e62c6477b73b 61 {
MACRUM 0:e62c6477b73b 62 if (count & 0x08) {
MACRUM 0:e62c6477b73b 63 m_C5_mask |= 0x01;
MACRUM 0:e62c6477b73b 64 m_lcd_buf[11] |= 0x01;
MACRUM 0:e62c6477b73b 65 } else {
MACRUM 0:e62c6477b73b 66 m_C5_mask &= ~0x01;
MACRUM 0:e62c6477b73b 67 m_lcd_buf[11] &= ~0x01;
MACRUM 0:e62c6477b73b 68 }
MACRUM 0:e62c6477b73b 69
MACRUM 0:e62c6477b73b 70 if (count & 0x04) {
MACRUM 0:e62c6477b73b 71 m_C5_mask |= 0x02;
MACRUM 0:e62c6477b73b 72 m_lcd_buf[11] |= 0x02;
MACRUM 0:e62c6477b73b 73 } else {
MACRUM 0:e62c6477b73b 74 m_C5_mask &= ~0x02;
MACRUM 0:e62c6477b73b 75 m_lcd_buf[11] &= ~0x02;
MACRUM 0:e62c6477b73b 76 }
MACRUM 0:e62c6477b73b 77
MACRUM 0:e62c6477b73b 78 if (count & 0x02) {
MACRUM 0:e62c6477b73b 79 m_C6_mask |= 0x01;
MACRUM 0:e62c6477b73b 80 m_lcd_buf[13] |= 0x01;
MACRUM 0:e62c6477b73b 81 } else {
MACRUM 0:e62c6477b73b 82 m_C6_mask &= ~0x01;
MACRUM 0:e62c6477b73b 83 m_lcd_buf[13] &= ~0x01;
MACRUM 0:e62c6477b73b 84 }
MACRUM 0:e62c6477b73b 85
MACRUM 0:e62c6477b73b 86 if (count & 0x01) {
MACRUM 0:e62c6477b73b 87 m_C6_mask |= 0x02;
MACRUM 0:e62c6477b73b 88 m_lcd_buf[13] |= 0x02;
MACRUM 0:e62c6477b73b 89 } else {
MACRUM 0:e62c6477b73b 90 m_C6_mask &= ~0x02;
MACRUM 0:e62c6477b73b 91 m_lcd_buf[13] &= ~0x02;
MACRUM 0:e62c6477b73b 92 }
MACRUM 0:e62c6477b73b 93 m_i2c.write(PCF8576_DEFAULT_SLAVE_ADDRESS, m_lcd_buf, 14);
MACRUM 0:e62c6477b73b 94
MACRUM 0:e62c6477b73b 95 }
MACRUM 0:e62c6477b73b 96
MACRUM 0:e62c6477b73b 97
MACRUM 0:e62c6477b73b 98 void PCF8576::print(char *str)
MACRUM 0:e62c6477b73b 99 {
MACRUM 0:e62c6477b73b 100 uint32_t len = strlen(str);
MACRUM 0:e62c6477b73b 101 if (len == 0)
MACRUM 0:e62c6477b73b 102 return;
MACRUM 0:e62c6477b73b 103 if (len > 6)
MACRUM 0:e62c6477b73b 104 len = 6;
MACRUM 0:e62c6477b73b 105
MACRUM 0:e62c6477b73b 106 m_lcd_buf[0] = PCF8576_CMD_DEVICE_SEL | (1 << 7);
MACRUM 0:e62c6477b73b 107 m_lcd_buf[1] = PCF8576_CMD_LOAD_DATA;
MACRUM 0:e62c6477b73b 108
MACRUM 0:e62c6477b73b 109 for(uint32_t i = 0; i < len; i++) {
MACRUM 0:e62c6477b73b 110 m_lcd_buf[(i*2) + 2] = (char)(FontMatrix[(*str - ' ')] & 0xFF);
MACRUM 0:e62c6477b73b 111 m_lcd_buf[(i*2) + 3] = (char)(FontMatrix[(*str - ' ')] >> 8);
MACRUM 0:e62c6477b73b 112 str++;
MACRUM 0:e62c6477b73b 113 }
MACRUM 0:e62c6477b73b 114
MACRUM 0:e62c6477b73b 115 m_lcd_buf[11] |= m_C5_mask;
MACRUM 0:e62c6477b73b 116 m_lcd_buf[13] |= m_C6_mask;
MACRUM 0:e62c6477b73b 117
MACRUM 0:e62c6477b73b 118 m_i2c.write(PCF8576_DEFAULT_SLAVE_ADDRESS, m_lcd_buf, 2 + (len*2));
MACRUM 0:e62c6477b73b 119 }