| /* |
| * Author: Mihai Tudor Panu <mihai.tudor.panu@intel.com> |
| * Copyright (c) 2015 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 <string> |
| #include <stdexcept> |
| #include "tm1637.h" |
| #include <stdarg.h> |
| |
| const uint8_t m_brkt[2] = {0x39, 0x0f}; |
| const uint8_t m_nums[10] = {0x3f, 0x06, 0x5b, 0x4f, 0x66, |
| 0x6d, 0x7d, 0x07, 0x7f, 0x6f}; |
| const uint8_t m_char[26] = {0x77, 0x7c, 0x39, 0x5e, 0x79, |
| 0x71, 0x6f, 0x76, 0x30, 0x1e, |
| 0x00, 0x38, 0x00, 0x00, 0x5c, |
| 0x73, 0x67, 0x50, 0x5b, 0x78, |
| 0x3e, 0x1c, 0x00, 0x00, 0x6e, |
| 0x5b}; |
| |
| using namespace std; |
| using namespace upm; |
| |
| upm::TM1637::TM1637(int clk_pin, int dio_pin, int bright, M_FAST_GPIO mmio) { |
| |
| if((m_clk = mraa_gpio_init(clk_pin)) == NULL){ |
| throw std::invalid_argument(std::string(__FUNCTION__) + |
| ": mraa_gpio_init(clk) failed, invalid pin?"); |
| return; |
| } |
| |
| if((m_dio = mraa_gpio_init(dio_pin)) == NULL){ |
| throw std::invalid_argument(std::string(__FUNCTION__) + |
| ": mraa_gpio_init(dio) failed, invalid pin?"); |
| return; |
| } |
| |
| mraa_gpio_dir(m_clk, MRAA_GPIO_OUT); |
| mraa_gpio_dir(m_dio, MRAA_GPIO_OUT); |
| |
| // Let the resistors pull the lines high |
| mraa_gpio_mode(m_clk, MRAA_GPIO_PULLUP); |
| mraa_gpio_mode(m_dio, MRAA_GPIO_PULLUP); |
| |
| if(mmio){ |
| if(mraa_gpio_use_mmaped(m_clk, 1) != MRAA_SUCCESS || |
| mraa_gpio_use_mmaped(m_dio, 1) != MRAA_SUCCESS){ |
| throw std::runtime_error(std::string(__FUNCTION__) + |
| ": mraa_gpio_use_mmaped() failed"); |
| return; |
| } |
| } |
| |
| mraa_gpio_write(m_clk, 0); |
| mraa_gpio_write(m_dio, 0); |
| |
| for (int i = 0; i < M_DISPLAY_DIGITS; i++) { |
| m_digits[i] = 0x00; |
| } |
| setBrightness(bright); |
| } |
| upm::TM1637::~TM1637() { |
| for (int i = 0; i < M_DISPLAY_DIGITS; i++) { |
| m_digits[i] = 0x00; |
| } |
| update(); |
| |
| mraa_gpio_close(m_clk); |
| mraa_gpio_close(m_dio); |
| } |
| mraa_result_t upm::TM1637::write(uint8_t *digits) { |
| for (int i = 0; i < M_DISPLAY_DIGITS; i++) { |
| m_digits[i] = digits[i]; |
| } |
| update(); |
| return MRAA_SUCCESS; |
| } |
| mraa_result_t upm::TM1637::write(int d, ...) { |
| va_list args; |
| va_start(args, d); |
| m_digits[0] = (uint8_t)d; |
| |
| for (int i = 1; i < M_DISPLAY_DIGITS; i++) { |
| m_digits[i] = (uint8_t)va_arg(args, int); |
| d++; |
| } |
| va_end(args); |
| update(); |
| return MRAA_SUCCESS; |
| } |
| mraa_result_t upm::TM1637::writeAt(int index, char symbol) { |
| if(index < 0 || index >= M_DISPLAY_DIGITS){ |
| cerr << "TM1637: invalid index in " << __FUNCTION__ << endl; |
| return MRAA_ERROR_INVALID_PARAMETER; |
| } |
| m_digits[index] = encode(symbol); |
| update(); |
| return MRAA_SUCCESS; |
| } |
| mraa_result_t upm::TM1637::write(std::string digits) { |
| int len = digits.length(); |
| if( len > M_DISPLAY_DIGITS){ |
| len = M_DISPLAY_DIGITS; |
| } |
| for (int i = 0; i < len; i++) { |
| m_digits[i] = encode(digits[i]); |
| } |
| update(); |
| return MRAA_SUCCESS; |
| } |
| void upm::TM1637::setColon(bool value) { |
| if(value){ |
| m_digits[1] |= 0x80; |
| } |
| else{ |
| m_digits[1] &= 0x7f; |
| } |
| update(); |
| } |
| void upm::TM1637::setBrightness(int value) { |
| m_brightness = value & 0x07; |
| update(); |
| } |
| void upm::TM1637::i2c_start() { |
| mraa_gpio_write(m_clk, 1); |
| mraa_gpio_write(m_dio, 1); |
| mraa_gpio_write(m_dio, 0); |
| } |
| void upm::TM1637::i2c_stop() { |
| mraa_gpio_write(m_clk, 0); |
| mraa_gpio_write(m_dio, 0); |
| mraa_gpio_write(m_clk, 1); |
| mraa_gpio_write(m_dio, 1); |
| } |
| void upm::TM1637::i2c_writeByte(uint8_t value) { |
| for(uint8_t i = 0; i < 8; i++) |
| { |
| mraa_gpio_write(m_clk, 0); |
| if(value & 0x01) |
| mraa_gpio_write(m_dio, 1); |
| else |
| mraa_gpio_write(m_dio, 0); |
| value >>= 1; |
| mraa_gpio_write(m_clk, 1); |
| } |
| |
| // Ack clock without skew, TM1637 is fast enough |
| mraa_gpio_write(m_clk, 0); |
| mraa_gpio_write(m_clk, 1); |
| mraa_gpio_write(m_clk, 0); |
| } |
| void upm::TM1637::update() { |
| i2c_start(); |
| i2c_writeByte(TM1637_ADDR); |
| i2c_stop(); |
| |
| i2c_start(); |
| i2c_writeByte(TM1637_REG); |
| for (int i = 0; i < M_DISPLAY_DIGITS; i++) { |
| i2c_writeByte(m_digits[i]); |
| } |
| i2c_stop(); |
| |
| i2c_start(); |
| i2c_writeByte(TM1637_CMD | m_brightness); |
| i2c_stop(); |
| } |
| uint8_t upm::TM1637::encode(char c) { |
| if(c >= '0' && c <= '9') |
| return m_nums[(int)c - 48]; |
| if(c >= 'a' && c <= 'z') |
| return m_char[(int)c - 97]; |
| if(c >= 'A' && c <= 'Z') |
| return m_char[(int)c - 65]; |
| if(c == '[') |
| return m_brkt[0]; |
| if(c == ']') |
| return m_brkt[1]; |
| if(c == '(' || c == ')') |
| return m_brkt[(int)c - 40]; |
| if(c == '-') |
| return 0x40; |
| if(c == '_') |
| return 0x08; |
| if(c == '}') |
| return 0x70; |
| if(c == '{') |
| return 0x46; |
| return 0x00; |
| } |