Jexus Chuang
done
Diff: TM1637.cpp
- Revision:
- 0:dc8789a6e21f
- Child:
- 1:f63d87466f55
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/TM1637.cpp Sat Jan 30 20:35:25 2016 +0000
@@ -0,0 +1,507 @@
+/* mbed TM1637 Library, for TM1637 LED controller
+ * Copyright (c) 2016, v01: WH, Initial version
+ *
+ * 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, inclumosig 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, INCLUmosiG 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 "mbed.h"
+#include "TM1637.h"
+
+/** Constructor for class for driving TM1637 LED controller with Serial bus interface device.
+ * @brief Supports 6 digits @ 8 segments.
+ *
+ * @param PinName mosi Serial bus MOSI pin
+ * @param PinName miso Serial bus MISO pin
+ * @param PinName sclk Serial bus SCLK pin
+*/
+TM1637::TM1637(PinName mosi, PinName miso, PinName sclk) : _mosi(mosi), _miso(miso), _sclk(sclk) {
+
+ _init();
+}
+
+/** Init the Serial interface and the controller
+ * @param none
+ * @return none
+ */
+void TM1637::_init(){
+
+//TM1637 uses a Serial bus that looks like I2C, but really is not.
+//It has Start and Stop conditions like I2C and an Ack pulse, but instead of slaveaddresses and a RW bit it just transmits commands and data.
+//init Serial bus
+ _mosi=1;
+ _sclk=1;
+
+//init controller
+ _display = TM1637_DSP_ON;
+ _bright = TM1637_BRT_DEF;
+ _writeCmd(TM1637_DSP_CTRL_CMD, _display | _bright ); // Display control cmd, display on/off, brightness
+
+ _writeCmd(TM1637_DATA_SET_CMD, TM1637_DATA_WR | TM1637_ADDR_INC | TM1637_MODE_NORM); // Data set cmd, normal mode, auto incr, write data
+}
+
+
+/** Clear the screen and locate to 0
+ */
+void TM1637::cls() {
+
+ _start();
+
+ _write(TM1637_ADDR_SET_CMD | 0x00); // Address set cmd, 0
+ for (int cnt=0; cnt<TM1637_DISPLAY_MEM; cnt++) {
+ _write(0x00); // data
+ }
+
+ _stop();
+}
+
+/** Set Brightness
+ *
+ * @param char brightness (3 significant bits, valid range 0..7 (1/16 .. 14/14 dutycycle)
+ * @return none
+ */
+void TM1637::setBrightness(char brightness){
+
+ _bright = brightness & TM1637_BRT_MSK; // mask invalid bits
+
+ _writeCmd(TM1637_DSP_CTRL_CMD, _display | _bright ); // Display control cmd, display on/off, brightness
+}
+
+/** Set the Display mode On/off
+ *
+ * @param bool display mode
+ */
+void TM1637::setDisplay(bool on) {
+
+ if (on) {
+ _display = TM1637_DSP_ON;
+ }
+ else {
+ _display = TM1637_DSP_OFF;
+ }
+
+ _writeCmd(TM1637_DSP_CTRL_CMD, _display | _bright ); // Display control cmd, display on/off, brightness
+}
+
+/** Write databyte to TM1637
+ * @param int address display memory location to write byte
+ * @param char data byte written at given address
+ * @return none
+ */
+void TM1637::writeData(char data, int address) {
+
+ _start();
+
+ _write(TM1637_ADDR_SET_CMD | (address & TM1637_ADDR_MSK)); // Set Address cmd
+ _write(data); // data
+
+ _stop();
+}
+
+/** Write Display datablock to TM1637
+ * @param DisplayData_t data Array of TM1637_DISPLAY_MEM (=16) bytes for displaydata
+ * @param length number bytes to write (valid range 0..(TM1637_MAX_NR_GRIDS * TM1637_BYTES_PER_GRID) (=16), when starting at address 0)
+ * @param int address display memory location to write bytes (default = 0)
+ * @return none
+ */
+void TM1637::writeData(DisplayData_t data, int length, int address) {
+
+ _start();
+
+// sanity check
+ address &= TM1637_ADDR_MSK;
+ if (length < 0) {length = 0;}
+ if ((length + address) > TM1637_DISPLAY_MEM) {length = (TM1637_DISPLAY_MEM - address);}
+
+// _write(TM1637_ADDR_SET_CMD | 0x00); // Set Address at 0
+ _write(TM1637_ADDR_SET_CMD | address); // Set Address
+
+ for (int idx=0; idx<length; idx++) {
+// _write(data[idx]); // data
+ _write(data[address + idx]); // data
+ }
+
+ _stop();
+}
+
+/** Read keydata block from TM1637
+ * @param *keydata Ptr to bytes for keydata
+ * @return bool keypress True when at least one key was pressed
+ *
+ */
+bool TM1637::getKeys(KeyData_t *keydata) {
+
+ _start();
+
+ // Enable Key Read mode
+ _write(TM1637_DATA_SET_CMD | TM1637_KEY_RD | TM1637_ADDR_INC | TM1637_MODE_NORM); // Data set cmd, normal mode, auto incr, read data
+
+ // Read keys
+ *keydata = _read(0xFF);
+
+ _stop();
+
+ // Restore Data Write mode
+ _writeCmd(TM1637_DATA_SET_CMD, TM1637_DATA_WR | TM1637_ADDR_INC | TM1637_MODE_NORM); // Data set cmd, normal mode, auto incr, write data
+
+ return (*keydata != TM1637_SW_NONE);
+}
+
+
+/** Generate Start condition for TM1637
+ * @param none
+ * @return none
+ */
+void TM1637::_start() {
+
+ _mosi=0;
+ wait_us(1);
+ _sclk=0;
+ wait_us(1);
+}
+
+/** Generate Stop condition for TM1637
+ * @param none
+ * @return none
+ */
+void TM1637::_stop() {
+
+ _mosi=0;
+ wait_us(1);
+ _sclk=1;
+ wait_us(1);
+ _mosi=1;
+ wait_us(1);
+}
+
+/** Send byte to TM1637
+ * @param int data
+ * @return none
+ */
+void TM1637::_write(int data) {
+
+ for (int bit=0; bit<8; bit++) {
+ //The TM1637 expects LSB first
+ if (((data >> bit) & 0x01) == 0x01) {
+ _mosi=1;
+ }
+ else {
+ _mosi=0;
+ }
+ wait_us(1);
+ _sclk=1;
+ wait_us(1);
+ _sclk=0;
+ wait_us(1);
+ }
+
+ // dummy Ack
+ _sclk=1;
+ wait_us(1);
+ _sclk=0;
+ wait_us(1);
+}
+
+/** Read byte from TM1637
+ * @param int senddata
+ * @return read byte
+ */
+char TM1637::_read(int data) {
+ char keycode = 0;
+
+ for (int bit=0; bit<8; bit++) {
+
+ // Prepare to read next bit, LSB first
+ keycode = keycode << 1;
+
+ //The TM1637 expects LSB first
+ if (((data >> bit) & 0x01) == 0x01) {
+ _mosi=1;
+ }
+ else {
+ _mosi=0;
+ }
+ wait_us(1);
+ _sclk=1;
+ wait_us(1);
+
+ // Read next bit, LSB first
+ if (_miso) { keycode |= 0x01; }
+
+ _sclk=0;
+ wait_us(1);
+ }
+
+ // dummy Ack
+ _sclk=1;
+ wait_us(1);
+ _sclk=0;
+ wait_us(1);
+
+ return keycode;
+}
+
+
+/** Write command and parameter to TM1637
+ * @param int cmd Command byte
+ * &Param int data Parameters for command
+ * @return none
+ */
+void TM1637::_writeCmd(int cmd, int data){
+
+ _start();
+
+ _write((cmd & TM1637_CMD_MSK) | (data & ~TM1637_CMD_MSK));
+
+ _stop();
+}
+
+
+#if (CATALEX_TEST == 1)
+// Derived class for TM1637 used in LED&KEY display unit
+//
+
+/** Constructor for class for driving TM1637 LED controller as used in CATALEX
+ *
+ * @brief Supports 8 Digits of 7 Segments + DP.
+ *
+ * @param PinName mosi Serial bus MOSI pin
+ * @param PinName miso Serial bus MISO pin
+ * @param PinName sclk Serial bus SCLK pin
+ */
+TM1637_CATALEX::TM1637_CATALEX(PinName mosi, PinName miso, PinName sclk) : TM1637(mosi, miso, sclk) {
+ _column = 0;
+ _columns = CATALEX_NR_DIGITS;
+}
+
+#if(0)
+#if DOXYGEN_ONLY
+ /** Write a character to the Display
+ *
+ * @param c The character to write to the display
+ */
+ int putc(int c);
+
+ /** Write a formatted string to the Display
+ *
+ * @param format A printf-style format string, followed by the
+ * variables to use in formatting the string.
+ */
+ int printf(const char* format, ...);
+#endif
+#endif
+
+/** Locate cursor to a screen column
+ *
+ * @param column The horizontal position from the left, indexed from 0
+ */
+void TM1637_CATALEX::locate(int column) {
+ //sanity check
+ if (column < 0) {column = 0;}
+ if (column > (_columns - 1)) {column = _columns - 1;}
+
+ _column = column;
+}
+
+
+/** Number of screen columns
+ *
+ * @param none
+ * @return columns
+ */
+int TM1637_CATALEX::columns() {
+ return _columns;
+}
+
+
+/** Clear the screen and locate to 0
+ * @param bool clrAll Clear Icons also (default = false)
+ */
+void TM1637_CATALEX::cls(bool clrAll) {
+
+ if (clrAll) {
+ //clear local buffer (inclumosig Icons)
+ for (int idx=0; idx < CATALEX_NR_GRIDS; idx++) {
+ _displaybuffer[idx] = 0x00;
+ }
+ }
+ else {
+ //clear local buffer (preserving Icons)
+ for (int idx=0; idx < CATALEX_NR_GRIDS; idx++) {
+ _displaybuffer[idx] = _displaybuffer[idx] & MASK_ICON_GRID[idx];
+ }
+ }
+
+ writeData(_displaybuffer, (CATALEX_NR_GRIDS * TM1637_BYTES_PER_GRID));
+
+ _column = 0;
+}
+
+/** Set Icon
+ *
+ * @param Icon icon Enums Icon has Grid position encoded in 8 MSBs, Icon pattern encoded in 16 LSBs
+ * @return none
+ */
+void TM1637_CATALEX::setIcon(Icon icon) {
+ int addr, icn;
+
+ icn = icon & 0xFFFF;
+ addr = (icon >> 24) & 0xFF;
+ addr = (addr - 1);
+
+ //Save char...and set bits for icon to write
+ _displaybuffer[addr] = _displaybuffer[addr] | LO(icn);
+// writeData(_displaybuffer, (CATALEX_NR_GRIDS * TM1637_BYTES_PER_GRID));
+ writeData(_displaybuffer, TM1637_BYTES_PER_GRID, addr);
+}
+
+/** Clr Icon
+ *
+ * @param Icon icon Enums Icon has Grid position encoded in 8 MSBs, Icon pattern encoded in 16 LSBs
+ * @return none
+ */
+void TM1637_CATALEX::clrIcon(Icon icon) {
+ int addr, icn;
+
+ icn = icon & 0xFFFF;
+ addr = (icon >> 24) & 0xFF;
+ addr = (addr - 1);
+
+ //Save char...and clr bits for icon to write
+ _displaybuffer[addr] = _displaybuffer[addr] & ~LO(icn);
+// writeData(_displaybuffer, (CATALEX_NR_GRIDS * TM1637_BYTES_PER_GRID));
+ writeData(_displaybuffer, TM1637_BYTES_PER_GRID, addr);
+}
+
+
+/** Set User Defined Characters (UDC)
+ *
+ * @param unsigned char udc_idx The Index of the UDC (0..7)
+ * @param int udc_data The bitpattern for the UDC (8 bits)
+ */
+void TM1637_CATALEX::setUDC(unsigned char udc_idx, int udc_data) {
+
+ //Sanity check
+ if (udc_idx > (CATALEX_NR_UDC-1)) {
+ return;
+ }
+ // Mask out Icon bits?
+
+ _UDC_7S[udc_idx] = LO(udc_data);
+}
+
+
+/** Write a single character (Stream implementation)
+ */
+int TM1637_CATALEX::_putc(int value) {
+ int addr;
+ bool validChar = false;
+ char pattern = 0x00;
+
+ if ((value == '\n') || (value == '\r')) {
+ //No character to write
+ validChar = false;
+
+ //Update Cursor
+ _column = 0;
+ }
+ else if ((value == '.') || (value == ',')) {
+ //No character to write
+ validChar = false;
+ pattern = S7_DP; // placeholder for all DPs
+
+ // Check to see that DP can be shown for current column
+ if (_column > 0) {
+ //Translate between _column and displaybuffer entries
+ //Add DP to bitpattern of digit left of current column.
+ addr = (_column - 1);
+
+ //Save icons...and set bits for decimal point to write
+ _displaybuffer[addr] = _displaybuffer[addr] | pattern;
+// writeData(_displaybuffer, (CATALEX_NR_GRIDS * TM1637_BYTES_PER_GRID));
+ writeData(_displaybuffer, TM1637_BYTES_PER_GRID, addr);
+
+ //No Cursor Update
+ }
+ }
+ else if ((value >= 0) && (value < CATALEX_NR_UDC)) {
+ //Character to write
+ validChar = true;
+ pattern = _UDC_7S[value];
+ }
+
+#if (SHOW_ASCII == 1)
+ //display all ASCII characters
+ else if ((value >= FONT_7S_START) && (value <= FONT_7S_END)) {
+ //Character to write
+ validChar = true;
+ pattern = FONT_7S[value - FONT_7S_START];
+ } // else
+#else
+ //display only digits and hex characters
+ else if (value == '-') {
+ //Character to write
+ validChar = true;
+ pattern = C7_MIN;
+ }
+ else if ((value >= (int)'0') && (value <= (int) '9')) {
+ //Character to write
+ validChar = true;
+ pattern = FONT_7S[value - (int) '0'];
+ }
+ else if ((value >= (int) 'A') && (value <= (int) 'F')) {
+ //Character to write
+ validChar = true;
+ pattern = FONT_7S[10 + value - (int) 'A'];
+ }
+ else if ((value >= (int) 'a') && (value <= (int) 'f')) {
+ //Character to write
+ validChar = true;
+ pattern = FONT_7S[10 + value - (int) 'a'];
+ } //else
+#endif
+
+ if (validChar) {
+ //Character to write
+
+ //Translate between _column and displaybuffer entries
+ addr = _column;
+
+ //Save icons...and set bits for character to write
+ _displaybuffer[addr] = (_displaybuffer[addr] & MASK_ICON_GRID[_column]) | pattern;
+
+// writeData(_displaybuffer, (CATALEX_NR_GRIDS * TM1637_BYTES_PER_GRID));
+ writeData(_displaybuffer, TM1637_BYTES_PER_GRID, addr);
+
+ //Update Cursor
+ _column++;
+ if (_column > (CATALEX_NR_DIGITS - 1)) {
+ _column = 0;
+ }
+
+ } // if validChar
+
+ return value;
+}
+
+
+// get a single character (Stream implementation)
+int TM1637_CATALEX::_getc() {
+ return -1;
+}
+
+#endif