4digitdisplay: rename to tm1637

* Use new cmake macro

Signed-off-by: Thomas Ingleby <thomas.c.ingleby@intel.com>

src/tm1637/tm1637.cxx

@@ -0,0 +1,191 @@
+/*
+ * Author: Yevgeniy Kiveisha <yevgeniy.kiveisha@intel.com>
+ * 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 <iostream>
+#include <unistd.h>
+#include <stdlib.h>
+
+#include "tm1637.h"
+
+using namespace upm;
+
+const uint8_t digitToSegment[] = {
+     // XGFEDCBA
+    0b00111111,    // 0
+    0b00000110,    // 1
+    0b01011011,    // 2
+    0b01001111,    // 3
+    0b01100110,    // 4
+    0b01101101,    // 5
+    0b01111101,    // 6
+    0b00000111,    // 7
+    0b01111111,    // 8
+    0b01101111,    // 9
+    0b01110111,    // A
+    0b01111100,    // B
+    0b00111001,    // C
+    0b01000111,    // D
+    0b01111001,    // E
+    0b01110001     // F
+};
+
+TM1637::TM1637 (uint8_t di, uint8_t dcki) {
+    maa_result_t error = MAA_SUCCESS;
+    maa_init();
+
+    // init clock context
+    m_clkPinCtx = maa_gpio_init(dcki);
+    if (m_clkPinCtx == NULL) {
+        fprintf(stderr, "Are you sure that pin%d you requested is valid on your platform?", dcki);
+        exit(1);
+    }
+    // init data context
+    m_dataPinCtx = maa_gpio_init(di);
+    if (m_dataPinCtx == NULL) {
+        fprintf(stderr, "Are you sure that pin%d you requested is valid on your platform?", di);
+        exit(1);
+    }
+    
+    // set direction (out)
+    error = maa_gpio_dir(m_clkPinCtx, MAA_GPIO_IN);
+    if (error != MAA_SUCCESS) {
+        maa_result_print(error);
+    }
+
+    // set direction (out)
+    error = maa_gpio_dir(m_dataPinCtx, MAA_GPIO_IN);
+    if (error != MAA_SUCCESS) {
+        maa_result_print(error);
+    }
+
+    error = maa_gpio_write (m_dataPinCtx, LOW);
+    error = maa_gpio_write (m_clkPinCtx, LOW);
+}
+
+TM1637::~TM1637() {
+    maa_result_t error = MAA_SUCCESS;
+    error = maa_gpio_close (m_dataPinCtx);
+    if (error != MAA_SUCCESS) {
+        maa_result_print(error);
+    }
+    error = maa_gpio_close (m_clkPinCtx);
+    if (error != MAA_SUCCESS) {
+        maa_result_print(error);
+    }
+}
+
+maa_result_t
+TM1637::setBrightness (uint8_t level) {
+    m_brightness = level;
+}
+
+maa_result_t
+TM1637::setSegments (const uint8_t segments[], uint8_t length, uint8_t pos) {
+    start();
+    writeByte(TM1637_I2C_COMM1);
+    stop();
+
+    start();
+    writeByte(TM1637_I2C_COMM2 + (pos & 0x03));
+    for (uint8_t idx = 0; idx < length; idx++) {
+        writeByte(segments[idx]);
+    }
+    stop();
+
+    start();
+    writeByte(TM1637_I2C_COMM3 + (m_brightness & 0x0f));
+    stop();
+}
+
+maa_result_t
+TM1637::write (std::string msg) {
+    char leter = '\0';
+    uint8_t data[] = { 0x0, 0x0, 0x0, 0x0 };
+    for (uint8_t idx = 0; idx < msg.length(); idx++) {
+        leter = msg[idx];
+        if (idx < 4) {
+            data[idx] = digitToSegment[strtol(&leter, NULL, 16)];
+        }
+    }
+    setBrightness (0x0f);
+    setSegments(data);
+}
+
+maa_result_t
+TM1637::pinMode (maa_gpio_context ctx, gpio_dir_t mode) {
+    maa_result_t error = MAA_SUCCESS;
+    error = maa_gpio_dir(ctx, mode);
+    if (error != MAA_SUCCESS) {
+        maa_result_print(error);
+    }
+}
+
+maa_result_t
+TM1637::start() {
+    pinMode (m_dataPinCtx, MAA_GPIO_OUT);
+    usleep(PULSE_LENGTH);
+}
+
+maa_result_t
+TM1637::stop() {
+    pinMode (m_dataPinCtx, MAA_GPIO_OUT);
+    usleep(PULSE_LENGTH);
+    pinMode (m_clkPinCtx, MAA_GPIO_IN);
+    usleep(PULSE_LENGTH);
+    pinMode (m_dataPinCtx, MAA_GPIO_IN);
+    usleep(PULSE_LENGTH);
+}
+
+maa_result_t
+TM1637::writeByte(uint8_t value) {
+    for (uint8_t idx = 0; idx < 8; idx++) {
+        pinMode(m_clkPinCtx, MAA_GPIO_OUT);
+        usleep(PULSE_LENGTH);
+        if (value & 0x01) {
+              pinMode(m_dataPinCtx, MAA_GPIO_IN);
+        } else {
+              pinMode(m_dataPinCtx, MAA_GPIO_OUT);
+        }
+        usleep(PULSE_LENGTH);
+
+        pinMode(m_clkPinCtx, MAA_GPIO_IN);
+        usleep(PULSE_LENGTH);
+        value = value >> 1;
+    }
+
+    pinMode(m_clkPinCtx, MAA_GPIO_OUT);
+    pinMode(m_dataPinCtx, MAA_GPIO_IN);
+    usleep(PULSE_LENGTH);
+
+    pinMode(m_clkPinCtx, MAA_GPIO_IN);
+    usleep(PULSE_LENGTH);
+
+    uint8_t ack = maa_gpio_read (m_dataPinCtx);
+    if (ack == 0) {
+        pinMode(m_dataPinCtx, MAA_GPIO_OUT);
+    } usleep(PULSE_LENGTH);
+
+    pinMode(m_clkPinCtx, MAA_GPIO_OUT);
+    usleep(50);
+}