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Diffstat (limited to 'peripheral/libupm/src/lcd/lcm1602.cxx')
| -rw-r--r-- | peripheral/libupm/src/lcd/lcm1602.cxx | 462 |
1 files changed, 0 insertions, 462 deletions
diff --git a/peripheral/libupm/src/lcd/lcm1602.cxx b/peripheral/libupm/src/lcd/lcm1602.cxx deleted file mode 100644 index 38f0c87..0000000 --- a/peripheral/libupm/src/lcd/lcm1602.cxx +++ /dev/null @@ -1,462 +0,0 @@ -/* - * The MIT License (MIT) - * - * Author: Daniel Mosquera - * Copyright (c) 2013 Daniel Mosquera - * - * Author: Thomas Ingleby <thomas.c.ingleby@intel.com> - * Copyright (c) 2014 Intel Corporation. - * - * Contributions: Jon Trulson <jtrulson@ics.com> - * Sergey Kiselev <sergey.kiselev@intel.com> - * - * 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 <string> -#include <stdexcept> -#include <unistd.h> - -#include "hd44780_bits.h" -#include "lcm1602.h" - -using namespace upm; - -Lcm1602::Lcm1602(int bus_in, int addr_in, bool isExpander, - uint8_t numColumns, uint8_t numRows) : - m_i2c_lcd_control(new mraa::I2c(bus_in)), - m_gpioRS(0), m_gpioEnable(0), m_gpioD0(0), - m_gpioD1(0), m_gpioD2(0), m_gpioD3(0), - m_numColumns(numColumns), m_numRows(numRows) -{ - mraa::Result error = mraa::SUCCESS; - m_name = "Lcm1602 (I2C)"; - m_isI2C = true; - - m_lcd_control_address = addr_in; - - error = m_i2c_lcd_control->address(m_lcd_control_address); - if (error != mraa::SUCCESS) { - throw std::invalid_argument(std::string(__FUNCTION__) + - ": I2c.address() failed"); - return; - } - - // default display control - m_displayControl = LCD_DISPLAYON | LCD_CURSOROFF | LCD_BLINKOFF; - - // if we are not dealing with an expander (say via a derived class - // like Jhd1313m1), then we do not want to execute the rest of the - // code below. Rather, the derived class's constructor should - // follow up with any setup required -- we will only initialize - // the I2C context and bail. - - if (!isExpander) - return; - - usleep(50000); - expandWrite(LCD_BACKLIGHT); - usleep(100000); - - write4bits(0x03 << 4); - usleep(4500); - write4bits(0x30); - usleep(4500); - write4bits(0x30); - usleep(150); - - // Put into 4 bit mode - write4bits(0x20); - - m_displayControl = LCD_DISPLAYON | LCD_CURSOROFF | LCD_BLINKOFF; - // Set numeber of lines - command(LCD_FUNCTIONSET | 0x0f); - command(LCD_DISPLAYCONTROL | m_displayControl); - clear(); - - // Set entry mode. - m_entryDisplayMode = LCD_ENTRYLEFT | LCD_ENTRYSHIFTDECREMENT; - command(LCD_ENTRYMODESET | m_entryDisplayMode); - - home(); -} - -Lcm1602::Lcm1602(uint8_t rs, uint8_t enable, uint8_t d0, - uint8_t d1, uint8_t d2, uint8_t d3, - uint8_t numColumns, uint8_t numRows) : - m_i2c_lcd_control(0), - m_gpioRS(new mraa::Gpio(rs)), m_gpioEnable(new mraa::Gpio(enable)), - m_gpioD0(new mraa::Gpio(d0)), m_gpioD1(new mraa::Gpio(d1)), - m_gpioD2(new mraa::Gpio(d2)), m_gpioD3(new mraa::Gpio(d3)), - m_numColumns(numColumns), m_numRows(numRows) -{ - mraa::Result error = mraa::SUCCESS; - m_name = "Lcm1602 (4-bit GPIO)"; - m_isI2C = false; - - // setup our gpios - - m_gpioRS->dir(mraa::DIR_OUT); - m_gpioEnable->dir(mraa::DIR_OUT); - - m_gpioD0->dir(mraa::DIR_OUT); - m_gpioD1->dir(mraa::DIR_OUT); - m_gpioD2->dir(mraa::DIR_OUT); - m_gpioD3->dir(mraa::DIR_OUT); - - - // set RS and Enable low to begin issuing commands - m_gpioRS->write(0); - m_gpioEnable->write(0); - - // wait to stabilize - usleep(100000); - - // set 4bit mode - - // These steps are adapted from the HD44780 datasheet, figure 24 - - // try 1 - write4bits(0x03); - usleep(4500); - - // try 2 - write4bits(0x03); - usleep(4500); - - // try 3 - write4bits(0x03); - usleep(150); - - // Finally, put into 4 bit mode - write4bits(0x02); - - // Set number of lines - command(LCD_FUNCTIONSET | LCD_2LINE | LCD_4BITMODE | LCD_5x8DOTS); - m_displayControl = LCD_DISPLAYON | LCD_CURSOROFF | LCD_BLINKOFF; - command(LCD_DISPLAYCONTROL | m_displayControl); - usleep(2000); - clear(); - - // Set entry mode. - m_entryDisplayMode = LCD_ENTRYLEFT | LCD_ENTRYSHIFTDECREMENT; - command(LCD_ENTRYMODESET | m_entryDisplayMode); - - home(); -} - -Lcm1602::~Lcm1602() -{ - // clean up after ourselves - if (m_isI2C) - { - delete m_i2c_lcd_control; - } - else - { - delete m_gpioRS; - delete m_gpioEnable; - - delete m_gpioD0; - delete m_gpioD1; - delete m_gpioD2; - delete m_gpioD3; - } -} - -/* - * ************** - * virtual area - * ************** - */ -mraa::Result -Lcm1602::write(std::string msg) -{ - mraa::Result error = mraa::SUCCESS; - for (std::string::size_type i = 0; i < msg.size(); ++i) { - error = data(msg[i]); - } - return error; -} - -mraa::Result -Lcm1602::setCursor(int row, int column) -{ - mraa::Result error = mraa::SUCCESS; - column = column % m_numColumns; - uint8_t offset = column; - - switch (m_numRows) - { - case 1: - // Single row displays with more than 8 columns usually have their - // DDRAM split in two halves. The first half starts at address 00. - // The second half starts at address 40. E.g. 16x2 DDRAM mapping: - // 00 01 02 03 04 05 06 07 40 41 42 43 44 45 46 47 - if (m_numColumns > 8) - { - offset = (column % (m_numColumns / 2)) + - (column / (m_numColumns / 2)) * 0x40; - } - break; - case 2: - // this should work for any display with two rows - // DDRAM mapping: - // 00 .. 27 - // 40 .. 67 - offset += row * 0x40; - break; - case 4: - if (m_numColumns == 16) - { - // 16x4 display - // DDRAM mapping: - // 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F - // 40 41 42 43 43 45 46 47 48 49 4A 4B 4C 4D 4E 4F - // 10 11 12 13 14 15 16 17 18 19 1A 1B 1C 1D 1E 1F - // 50 51 52 53 54 55 56 57 58 59 5A 5B 5C 5D 5E 5F - int row_addr[] = { 0x00, 0x40, 0x10, 0x50 }; - offset += row_addr[row]; - } - else - { - // 20x4 display - // DDRAM mapping: - // 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 10 11 12 13 - // 40 41 42 43 43 45 46 47 48 49 4A 4B 4C 4D 4E 4F 50 51 52 53 - // 14 15 16 17 18 19 1A 1B 1C 1D 1E 1F 20 21 22 23 24 25 26 27 - // 54 55 56 57 58 59 5A 5B 5C 5D 5E 5F 60 61 62 63 64 65 66 67 - int row_addr[] = { 0x00, 0x40, 0x14, 0x54 }; - offset += row_addr[row]; - } - break; - } - - return command(LCD_CMD | offset); -} - -mraa::Result -Lcm1602::clear() -{ - mraa::Result ret; - ret = command(LCD_CLEARDISPLAY); - usleep(2000); // this command takes awhile - return ret; -} - -mraa::Result -Lcm1602::home() -{ - mraa::Result ret; - ret = command(LCD_RETURNHOME); - usleep(2000); // this command takes awhile - return ret; -} - -mraa::Result -Lcm1602::createChar(uint8_t charSlot, uint8_t charData[]) -{ - mraa::Result error = mraa::SUCCESS; - charSlot &= 0x07; // only have 8 positions we can set - error = command(LCD_SETCGRAMADDR | (charSlot << 3)); - if (error == mraa::SUCCESS) { - for (int i = 0; i < 8; i++) { - error = data(charData[i]); - } - } - - return error; -} - -mraa::Result Lcm1602::displayOn() -{ - m_displayControl |= LCD_DISPLAYON; - return command(LCD_DISPLAYCONTROL | m_displayControl); -} - -mraa::Result Lcm1602::displayOff() -{ - m_displayControl &= ~LCD_DISPLAYON; - return command(LCD_DISPLAYCONTROL | m_displayControl); -} - -mraa::Result Lcm1602::cursorOn() -{ - m_displayControl |= LCD_CURSORON; - return command(LCD_DISPLAYCONTROL | m_displayControl); -} - -mraa::Result Lcm1602::cursorOff() -{ - m_displayControl &= ~LCD_CURSORON; - return command(LCD_DISPLAYCONTROL | m_displayControl); -} - -mraa::Result Lcm1602::cursorBlinkOn() -{ - m_displayControl |= LCD_BLINKON; - return command(LCD_DISPLAYCONTROL | m_displayControl); -} - -mraa::Result Lcm1602::cursorBlinkOff() -{ - m_displayControl &= ~LCD_BLINKON; - return command(LCD_DISPLAYCONTROL | m_displayControl); -} - -mraa::Result Lcm1602::scrollDisplayLeft() -{ - return command(LCD_CURSORSHIFT | LCD_DISPLAYMOVE | LCD_MOVELEFT); -} - -mraa::Result Lcm1602::scrollDisplayRight() -{ - return command(LCD_CURSORSHIFT | LCD_DISPLAYMOVE | LCD_MOVERIGHT); -} - -mraa::Result Lcm1602::entryLeftToRight() -{ - m_entryDisplayMode |= LCD_ENTRYLEFT; - return command(LCD_ENTRYMODESET | m_entryDisplayMode); -} - -mraa::Result Lcm1602::entryRightToLeft() -{ - m_entryDisplayMode &= ~LCD_ENTRYLEFT; - return command(LCD_ENTRYMODESET | m_entryDisplayMode); -} - -mraa::Result Lcm1602::autoscrollOn() -{ - m_entryDisplayMode |= LCD_ENTRYSHIFTINCREMENT; - return command(LCD_ENTRYMODESET | m_entryDisplayMode); -} - -mraa::Result Lcm1602::autoscrollOff() -{ - m_entryDisplayMode &= ~LCD_ENTRYSHIFTINCREMENT; - return command(LCD_ENTRYMODESET | m_entryDisplayMode); -} - -mraa::Result Lcm1602::command(uint8_t cmd) -{ - return send(cmd, 0); -} - -mraa::Result Lcm1602::data(uint8_t cmd) -{ - return send(cmd, LCD_RS); // 1 -} - - -/* - * ************** - * private area - * ************** - */ -mraa::Result -Lcm1602::send(uint8_t value, int mode) -{ - mraa::Result ret = mraa::SUCCESS; - uint8_t h; - uint8_t l; - - if (m_isI2C) - { - h = value & 0xf0; - l = (value << 4) & 0xf0; - ret = write4bits(h | mode); - ret = write4bits(l | mode); - return ret; - } - - // else, gpio (4 bit) - - // register select - m_gpioRS->write(mode); - - h = value >> 4; - l = value & 0x0f; - - ret = write4bits(h); - ret = write4bits(l); - return ret; -} - -mraa::Result -Lcm1602::write4bits(uint8_t value) -{ - mraa::Result ret = mraa::SUCCESS; - - if (m_isI2C) - { - ret = expandWrite(value); - ret = pulseEnable(value); - return ret; - } - - // else gpio - ret = m_gpioD0->write( ((value >> 0) & 0x01) ); - ret = m_gpioD1->write( ((value >> 1) & 0x01) ); - ret = m_gpioD2->write( ((value >> 2) & 0x01) ); - ret = m_gpioD3->write( ((value >> 3) & 0x01) ); - - ret = pulseEnable(value); // value is ignored here for gpio - - return ret; -} - -mraa::Result -Lcm1602::expandWrite(uint8_t value) -{ - // invalid for gpio - if (!m_isI2C) - return mraa::ERROR_INVALID_RESOURCE; - - uint8_t buffer = value | LCD_BACKLIGHT; - return m_i2c_lcd_control->writeByte(buffer); -} - -mraa::Result -Lcm1602::pulseEnable(uint8_t value) -{ - mraa::Result ret = mraa::SUCCESS; - - if (m_isI2C) - { - ret = expandWrite(value | LCD_EN); - usleep(1); - ret = expandWrite(value & ~LCD_EN); - usleep(50); - return ret; - } - - // else gpio - - ret = m_gpioEnable->write(0); - usleep(1); - ret = m_gpioEnable->write(1); - usleep(1); // must be > 450ns - ret = m_gpioEnable->write(0); - usleep(100); // must be >37us - - return ret; -} |