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-/*
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- * Author: Yevgeniy Kiveisha <yevgeniy.kiveisha@intel.com>
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- * Copyright (c) 2014 Intel Corporation.
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- *
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- * Permission is hereby granted, free of charge, to any person obtaining
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- * a copy of this software and associated documentation files (the
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- * "Software"), to deal in the Software without restriction, including
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- * without limitation the rights to use, copy, modify, merge, publish,
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- * distribute, sublicense, and/or sell copies of the Software, and to
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- * permit persons to whom the Software is furnished to do so, subject to
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- * the following conditions:
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- *
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- * The above copyright notice and this permission notice shall be
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- * included in all copies or substantial portions of the Software.
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- *
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- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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- * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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- * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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- * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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- * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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- */
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-
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-#include <iostream>
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-#include <unistd.h>
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-#include <stdlib.h>
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-
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-#include "tm1637.h"
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-
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-using namespace upm;
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-
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-const uint8_t digitToSegment[] = {
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- // XGFEDCBA
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- 0b00111111, // 0
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- 0b00000110, // 1
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- 0b01011011, // 2
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- 0b01001111, // 3
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- 0b01100110, // 4
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- 0b01101101, // 5
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- 0b01111101, // 6
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- 0b00000111, // 7
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- 0b01111111, // 8
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- 0b01101111, // 9
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- 0b01110111, // A
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- 0b01111100, // B
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- 0b00111001, // C
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- 0b01000111, // D
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- 0b01111001, // E
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- 0b01110001 // F
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-};
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-
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-TM1637::TM1637 (uint8_t di, uint8_t dcki) {
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- mraa_result_t error = MRAA_SUCCESS;
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- mraa_init();
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-
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- // init clock context
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- m_clkPinCtx = mraa_gpio_init(dcki);
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- if (m_clkPinCtx == NULL) {
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- fprintf(stderr, "Are you sure that pin%d you requested is valid on your platform?", dcki);
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- exit(1);
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- }
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- // init data context
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- m_dataPinCtx = mraa_gpio_init(di);
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- if (m_dataPinCtx == NULL) {
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- fprintf(stderr, "Are you sure that pin%d you requested is valid on your platform?", di);
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- exit(1);
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- }
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-
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- // set direction (out)
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- error = mraa_gpio_dir(m_clkPinCtx, MRAA_GPIO_IN);
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- if (error != MRAA_SUCCESS) {
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- mraa_result_print(error);
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- }
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-
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- // set direction (out)
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- error = mraa_gpio_dir(m_dataPinCtx, MRAA_GPIO_IN);
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- if (error != MRAA_SUCCESS) {
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- mraa_result_print(error);
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- }
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-
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- error = mraa_gpio_write (m_dataPinCtx, LOW);
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- error = mraa_gpio_write (m_clkPinCtx, LOW);
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-}
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-
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-TM1637::~TM1637() {
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- mraa_result_t error = MRAA_SUCCESS;
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- error = mraa_gpio_close (m_dataPinCtx);
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- if (error != MRAA_SUCCESS) {
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- mraa_result_print(error);
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- }
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- error = mraa_gpio_close (m_clkPinCtx);
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- if (error != MRAA_SUCCESS) {
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- mraa_result_print(error);
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- }
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-}
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-
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-mraa_result_t
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-TM1637::setBrightness (uint8_t level) {
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- m_brightness = level;
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-}
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-
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-mraa_result_t
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-TM1637::setSegments (const uint8_t segments[], uint8_t length, uint8_t pos) {
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- start();
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- writeByte(TM1637_I2C_COMM1);
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- stop();
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-
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- start();
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- writeByte(TM1637_I2C_COMM2 + (pos & 0x03));
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- for (uint8_t idx = 0; idx < length; idx++) {
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- writeByte(segments[idx]);
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- }
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- stop();
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-
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- start();
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- writeByte(TM1637_I2C_COMM3 + (m_brightness & 0x0f));
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- stop();
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-}
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-
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-mraa_result_t
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-TM1637::write (std::string msg) {
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- char leter = '\0';
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- uint8_t data[] = { 0x0, 0x0, 0x0, 0x0 };
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- for (uint8_t idx = 0; idx < msg.length(); idx++) {
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- leter = msg[idx];
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- if (idx < 4) {
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- data[idx] = digitToSegment[strtol(&leter, NULL, 16)];
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- }
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- }
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- setBrightness (0x0f);
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- setSegments(data);
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-}
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-
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-mraa_result_t
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-TM1637::pinMode (mraa_gpio_context ctx, gpio_dir_t mode) {
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- mraa_result_t error = MRAA_SUCCESS;
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- error = mraa_gpio_dir(ctx, mode);
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- if (error != MRAA_SUCCESS) {
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- mraa_result_print(error);
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- }
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-}
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-
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-mraa_result_t
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-TM1637::start() {
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- pinMode (m_dataPinCtx, MRAA_GPIO_OUT);
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- usleep(PULSE_LENGTH);
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-}
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-
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-mraa_result_t
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-TM1637::stop() {
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- pinMode (m_dataPinCtx, MRAA_GPIO_OUT);
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- usleep(PULSE_LENGTH);
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- pinMode (m_clkPinCtx, MRAA_GPIO_IN);
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- usleep(PULSE_LENGTH);
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- pinMode (m_dataPinCtx, MRAA_GPIO_IN);
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- usleep(PULSE_LENGTH);
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-}
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-
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-mraa_result_t
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-TM1637::writeByte(uint8_t value) {
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- for (uint8_t idx = 0; idx < 8; idx++) {
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- pinMode(m_clkPinCtx, MRAA_GPIO_OUT);
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- usleep(PULSE_LENGTH);
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- if (value & 0x01) {
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- pinMode(m_dataPinCtx, MRAA_GPIO_IN);
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- } else {
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- pinMode(m_dataPinCtx, MRAA_GPIO_OUT);
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- }
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- usleep(PULSE_LENGTH);
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-
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- pinMode(m_clkPinCtx, MRAA_GPIO_IN);
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- usleep(PULSE_LENGTH);
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- value = value >> 1;
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- }
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-
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- pinMode(m_clkPinCtx, MRAA_GPIO_OUT);
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- pinMode(m_dataPinCtx, MRAA_GPIO_IN);
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- usleep(PULSE_LENGTH);
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-
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- pinMode(m_clkPinCtx, MRAA_GPIO_IN);
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- usleep(PULSE_LENGTH);
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-
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- uint8_t ack = mraa_gpio_read (m_dataPinCtx);
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- if (ack == 0) {
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- pinMode(m_dataPinCtx, MRAA_GPIO_OUT);
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- } usleep(PULSE_LENGTH);
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-
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- pinMode(m_clkPinCtx, MRAA_GPIO_OUT);
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- usleep(50);
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-}
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John Van Drasek
9 years ago