/* * Author: Yevgeniy Kiveisha * Copyright (c) 2014 Intel Corporation. * * 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 #include #include "i2clcd.h" using namespace upm; I2CLcd::I2CLcd (int bus, int lcdAddress) { m_lcd_control_address = lcdAddress; m_bus = bus; m_i2c_lcd_control = mraa_i2c_init(m_bus); mraa_result_t ret = mraa_i2c_address(m_i2c_lcd_control, m_lcd_control_address); if (ret != MRAA_SUCCESS) { fprintf(stderr, "Messed up i2c bus\n"); } } mraa_result_t I2CLcd::write (int row, int column, std::string msg) { setCursor (row, column); write (msg); } mraa_result_t I2CLcd::createChar(uint8_t charSlot, uint8_t charData[]) { mraa_result_t error = MRAA_SUCCESS; charSlot &= 0x07; // only have 8 positions we can set error = i2Cmd(m_i2c_lcd_control, LCD_SETCGRAMADDR | (charSlot << 3)); if (error == MRAA_SUCCESS) { for (int i = 0; i < 8; i++) { error = i2cData(m_i2c_lcd_control, charData[i]); } } return error; } mraa_result_t I2CLcd::close() { return mraa_i2c_stop(m_i2c_lcd_control); } mraa_result_t I2CLcd::i2cReg (mraa_i2c_context ctx, int deviceAdress, int addr, uint8_t value) { mraa_result_t error = MRAA_SUCCESS; uint8_t data[2] = { addr, value }; error = mraa_i2c_address (ctx, deviceAdress); error = mraa_i2c_write (ctx, data, 2); return error; } mraa_result_t I2CLcd::i2Cmd (mraa_i2c_context ctx, uint8_t value) { mraa_result_t error = MRAA_SUCCESS; uint8_t data[2] = { LCD_CMD, value }; error = mraa_i2c_address (ctx, m_lcd_control_address); error = mraa_i2c_write (ctx, data, 2); return error; } mraa_result_t I2CLcd::i2cData (mraa_i2c_context ctx, uint8_t value) { mraa_result_t error = MRAA_SUCCESS; uint8_t data[2] = { LCD_DATA, value }; error = mraa_i2c_address (ctx, m_lcd_control_address); error = mraa_i2c_write (ctx, data, 2); return error; }