Wim Huiskamp
Library for TM1637 LEDcontroller
Dependents: mbed_TM1637 TM1637_test
See here for more information.
Diff: TM1637.cpp
- Revision:
- 1:f63d87466f55
- Parent:
- 0:dc8789a6e21f
--- a/TM1637.cpp Sat Jan 30 20:35:25 2016 +0000
+++ b/TM1637.cpp Fri Oct 06 16:43:56 2017 +0000
@@ -1,5 +1,8 @@
/* mbed TM1637 Library, for TM1637 LED controller
* Copyright (c) 2016, v01: WH, Initial version
+ * 2017, v02: WH, Added RobotDyn 6 Digit module,
+ * Added Eyewink 6 Digit + 6 Keys module,
+ * Constructor adapted to 2 pins: dio, clk
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
@@ -22,18 +25,46 @@
#include "mbed.h"
#include "TM1637.h"
+#if(SPI==1)
/** 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) {
+ *
+ * @brief Supports 6 Grids @ 8 segments. Also supports upto 16 Keys.
+ * Serial bus interface device.
+ * DEPRECATED version
+ *
+ * @param PinName mosi_nc Serial bus NC pin
+ * @param PinName miso_dio Serial bus DIO pin
+ * @param PinName sclk_clk Serial bus CLK pin
+ */
+TM1637::TM1637(PinName mosi_nc, PinName miso_dio, PinName sclk_clk) : _mosi_nc(mosi_nc), _dio(miso_dio), _clk(sclk_clk) {
_init();
}
+/** Constructor for class for driving TM1637 LED controller with Serial bus interface device.
+ * @brief Supports 6 digits @ 8 segments. Also supports upto 16 Keys.
+ *
+ * @param PinName dio Serial bus DIO pin
+ * @param PinName clk Serial bus CLK pin
+*/
+TM1637::TM1637(PinName dio, PinName clk) : _mosi_nc(NC), _dio(dio), _clk(clk) {
+
+ _init();
+}
+#else
+
+/** Constructor for class for driving TM1637 LED controller with Serial bus interface device.
+ * @brief Supports 6 digits @ 8 segments. Also supports upto 16 Keys.
+ *
+ * @param PinName dio Serial bus DIO pin
+ * @param PinName clk Serial bus CLK pin
+*/
+TM1637::TM1637(PinName dio, PinName clk) : _dio(dio), _clk(clk) {
+
+ _init();
+}
+
+#endif
/** Init the Serial interface and the controller
* @param none
* @return none
@@ -42,9 +73,14 @@
//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;
+ _dio.output();
+// _dio.mode(PullUp);
+ wait_us(1);
+
+ _dio=1;
+ _clk=1;
//init controller
_display = TM1637_DSP_ON;
@@ -141,7 +177,6 @@
/** 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) {
@@ -151,7 +186,9 @@
_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);
+ // Bitpattern S0 S1 S2 K1 K2 1 1 1
+ *keydata = _read();
+// printf("Key = 0x%02x\r\n", *keydata);
_stop();
@@ -168,9 +205,9 @@
*/
void TM1637::_start() {
- _mosi=0;
+ _dio=0;
wait_us(1);
- _sclk=0;
+ _clk=0;
wait_us(1);
}
@@ -180,11 +217,11 @@
*/
void TM1637::_stop() {
- _mosi=0;
+ _dio=0;
wait_us(1);
- _sclk=1;
+ _clk=1;
wait_us(1);
- _mosi=1;
+ _dio=1;
wait_us(1);
}
@@ -197,65 +234,85 @@
for (int bit=0; bit<8; bit++) {
//The TM1637 expects LSB first
if (((data >> bit) & 0x01) == 0x01) {
- _mosi=1;
+ _dio=1;
}
else {
- _mosi=0;
+ _dio=0;
}
wait_us(1);
- _sclk=1;
+ _clk=1;
wait_us(1);
- _sclk=0;
+ _clk=0;
wait_us(1);
}
+
+ _dio=1;
+ // Prepare DIO to read data
+ _dio.input();
+ wait_us(3);
+
// dummy Ack
- _sclk=1;
+ _clk=1;
wait_us(1);
- _sclk=0;
+// _ack = _dio;
+ _clk=0;
wait_us(1);
+
+ // Return DIO to output mode
+ _dio.output();
+ wait_us(3);
+
+ _dio=1; //idle
}
/** Read byte from TM1637
- * @param int senddata
* @return read byte
*/
-char TM1637::_read(int data) {
+char TM1637::_read() {
char keycode = 0;
-
- for (int bit=0; bit<8; bit++) {
-
- // Prepare to read next bit, LSB first
- keycode = keycode << 1;
+
+ // Prepare DIO to read data
+ _dio.input();
+ wait_us(3);
- //The TM1637 expects LSB first
- if (((data >> bit) & 0x01) == 0x01) {
- _mosi=1;
- }
- else {
- _mosi=0;
- }
+ for (int bit=0; bit<8; bit++) {
+
+ //The TM1637 sends bitpattern: S0 S1 S2 K1 K2 1 1 1
+ //Data is shifted out by the TM1637 on the falling edge of CLK
+ //Observe sufficient delay to allow the Open Drain DIO to rise to H levels
+ // Prepare to read next bit, LSB (ie S0) first.
+ // The code below flips bits for easier matching with datasheet
+ keycode = keycode << 1;
+
+ _clk=1;
wait_us(1);
- _sclk=1;
- wait_us(1);
+
+ // Read next bit
+ if (_dio) { keycode |= 0x01; }
- // Read next bit, LSB first
- if (_miso) { keycode |= 0x01; }
-
- _sclk=0;
- wait_us(1);
+ _clk=0;
+ wait_us(5); // Delay to allow for slow risetime
}
+ // Return DIO to output mode
+ _dio.output();
+ wait_us(3);
+
// dummy Ack
- _sclk=1;
+ _dio=0; //Ack
wait_us(1);
- _sclk=0;
+
+ _clk=1;
+ wait_us(1);
+ _clk=0;
wait_us(1);
+ _dio=1; //idle
+
return keycode;
}
-
/** Write command and parameter to TM1637
* @param int cmd Command byte
* &Param int data Parameters for command
@@ -275,15 +332,31 @@
// Derived class for TM1637 used in LED&KEY display unit
//
+#if(SPI==1)
/** Constructor for class for driving TM1637 LED controller as used in CATALEX
*
- * @brief Supports 8 Digits of 7 Segments + DP.
+ * @brief Supports 4 Digits of 7 Segments + DP (or Colon for Digit2 on some models).
+ * DEPRECATED version
*
- * @param PinName mosi Serial bus MOSI pin
- * @param PinName miso Serial bus MISO pin
- * @param PinName sclk Serial bus SCLK pin
+ * @param PinName mosi_nc Serial bus NC pin
+ * @param PinName miso_dio Serial bus DIO pin
+ * @param PinName sclk_clk Serial bus CLK pin
*/
-TM1637_CATALEX::TM1637_CATALEX(PinName mosi, PinName miso, PinName sclk) : TM1637(mosi, miso, sclk) {
+TM1637_CATALEX::TM1637_CATALEX(PinName mosi_nc, PinName miso_dio, PinName sclk_clk) : TM1637(mosi_nc, miso_dio, sclk_clk) {
+ _column = 0;
+ _columns = CATALEX_NR_DIGITS;
+}
+#endif
+
+/** Constructor for class for driving TM1637 LED controller
+ *
+ * @brief Supports 4 Digits of 7 Segments + DP (or Colon for Digit2 on some models).
+ * Serial bus interface device.
+ *
+ * @param PinName dio Serial bus DIO pin
+ * @param PinName sck Serial bus CLK pin
+ */
+TM1637_CATALEX::TM1637_CATALEX(PinName dio, PinName clk) : TM1637(dio, clk) {
_column = 0;
_columns = CATALEX_NR_DIGITS;
}
@@ -346,7 +419,7 @@
}
}
- writeData(_displaybuffer, (CATALEX_NR_GRIDS * TM1637_BYTES_PER_GRID));
+ writeData(_displaybuffer, (CATALEX_NR_GRIDS * TM1637_BYTES_PER_GRID), 0);
_column = 0;
}
@@ -365,7 +438,7 @@
//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, (CATALEX_NR_GRIDS * TM1637_BYTES_PER_GRID), 0);
writeData(_displaybuffer, TM1637_BYTES_PER_GRID, addr);
}
@@ -383,7 +456,7 @@
//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, (CATALEX_NR_GRIDS * TM1637_BYTES_PER_GRID), 0);
writeData(_displaybuffer, TM1637_BYTES_PER_GRID, addr);
}
@@ -408,6 +481,11 @@
/** Write a single character (Stream implementation)
*/
int TM1637_CATALEX::_putc(int value) {
+//The CATALAX mapping between Digit positions (Left to Right) and Grids is:
+// GR1 GR2 GR3 GR4
+//The memory addresses or column numbers are:
+// 0 1 2 3
+
int addr;
bool validChar = false;
char pattern = 0x00;
@@ -505,3 +583,490 @@
}
#endif
+
+#if (ROBOTDYN_TEST == 1)
+// Derived class for TM1637 used in ROBOTDYN display unit
+//
+
+/** Constructor for class for driving TM1637 LED controller as used in ROBOTDYN
+ *
+ * @brief Supports 6 Digits of 7 Segments + DP.
+ *
+ * @param PinName dio Serial bus DIO pin
+ * @param PinName clk Serial bus CLK pin
+ */
+TM1637_ROBOTDYN::TM1637_ROBOTDYN(PinName dio, PinName clk) : TM1637(dio, clk) {
+ _column = 0;
+ _columns = ROBOTDYN_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_ROBOTDYN::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_ROBOTDYN::columns() {
+ return _columns;
+}
+
+
+/** Clear the screen and locate to 0
+ * @param bool clrAll Clear Icons also (default = false)
+ */
+void TM1637_ROBOTDYN::cls(bool clrAll) {
+
+ if (clrAll) {
+ //clear local buffer (including Icons)
+ for (int idx=0; idx < ROBOTDYN_NR_GRIDS; idx++) {
+ _displaybuffer[idx] = 0x00;
+ }
+ }
+ else {
+ //clear local buffer (preserving Icons)
+ for (int idx=0; idx < ROBOTDYN_NR_GRIDS; idx++) {
+ _displaybuffer[idx] = _displaybuffer[idx] & MASK_ICON_GRID[idx];
+ }
+ }
+
+ writeData(_displaybuffer, (ROBOTDYN_NR_GRIDS * TM1637_BYTES_PER_GRID), 0);
+
+ _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_ROBOTDYN::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, (ROBOTDYN_NR_GRIDS * TM1637_BYTES_PER_GRID), 0);
+ 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_ROBOTDYN::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, (ROBOTDYN_NR_GRIDS * TM1637_BYTES_PER_GRID), 0);
+ 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_ROBOTDYN::setUDC(unsigned char udc_idx, int udc_data) {
+
+ //Sanity check
+ if (udc_idx > (ROBOTDYN_NR_UDC-1)) {
+ return;
+ }
+ // Mask out Icon bits?
+
+ _UDC_7S[udc_idx] = LO(udc_data);
+}
+
+/** Write a single character (Stream implementation)
+ *
+ */
+int TM1637_ROBOTDYN::_putc(int value) {
+//The ROBOTDYN mapping between Digit positions (Left to Right) and Grids is:
+// GR3 GR2 GR1 GR6 GR5 GR4
+//The memory addresses or column numbers are:
+// 2 1 0 5 4 3
+//The Grids are reversed for 2 sets of 3 digits:
+ const int col2addr[] = {2, 1, 0, 5, 4, 3};
+
+ 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 = col2addr [_column - 1];
+
+ //Save icons...and set bits for decimal point to write
+ _displaybuffer[addr] = _displaybuffer[addr] | pattern;
+// writeData(_displaybuffer, (ROBOTDYN_NR_GRIDS * TM1637_BYTES_PER_GRID));
+ writeData(_displaybuffer, TM1637_BYTES_PER_GRID, addr);
+
+ //No Cursor Update
+ }
+ }
+ else if ((value >= 0) && (value < ROBOTDYN_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 = col2addr[_column];
+
+ //Save icons...and set bits for character to write
+ _displaybuffer[addr] = (_displaybuffer[addr] & MASK_ICON_GRID[_column]) | pattern;
+
+// writeData(_displaybuffer, (ROBOTDYN_NR_GRIDS * TM1637_BYTES_PER_GRID));
+ writeData(_displaybuffer, TM1637_BYTES_PER_GRID, addr);
+
+ //Update Cursor
+ _column++;
+ if (_column > (ROBOTDYN_NR_DIGITS - 1)) {
+ _column = 0;
+ }
+
+ } // if validChar
+
+ return value;
+}
+
+
+// get a single character (Stream implementation)
+int TM1637_ROBOTDYN::_getc() {
+ return -1;
+}
+
+#endif
+
+
+#if (EYEWINK_TEST == 1)
+// Derived class for TM1637 used in EYEWINK display unit
+//
+
+/** Constructor for class for driving TM1637 LED controller as used in EYEWINK
+ *
+ * @brief Supports 6 Digits of 7 Segments + DP and 6 Keys.
+ *
+ * @param PinName dio Serial bus DIO pin
+ * @param PinName clk Serial bus CLK pin
+ */
+TM1637_EYEWINK::TM1637_EYEWINK(PinName dio, PinName clk) : TM1637(dio, clk) {
+ _column = 0;
+ _columns = EYEWINK_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_EYEWINK::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_EYEWINK::columns() {
+ return _columns;
+}
+
+
+/** Clear the screen and locate to 0
+ * @param bool clrAll Clear Icons also (default = false)
+ */
+void TM1637_EYEWINK::cls(bool clrAll) {
+
+ if (clrAll) {
+ //clear local buffer (including Icons)
+ for (int idx=0; idx < EYEWINK_NR_GRIDS; idx++) {
+ _displaybuffer[idx] = 0x00;
+ }
+ }
+ else {
+ //clear local buffer (preserving Icons)
+ for (int idx=0; idx < EYEWINK_NR_GRIDS; idx++) {
+ _displaybuffer[idx] = _displaybuffer[idx] & MASK_ICON_GRID[idx];
+ }
+ }
+
+ writeData(_displaybuffer, (EYEWINK_NR_GRIDS * TM1637_BYTES_PER_GRID), 0);
+
+ _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_EYEWINK::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, (EYEWINK_NR_GRIDS * TM1637_BYTES_PER_GRID), 0);
+ 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_EYEWINK::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, (EYEWINK_NR_GRIDS * TM1637_BYTES_PER_GRID), 0);
+ 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_EYEWINK::setUDC(unsigned char udc_idx, int udc_data) {
+
+ //Sanity check
+ if (udc_idx > (EYEWINK_NR_UDC-1)) {
+ return;
+ }
+ // Mask out Icon bits?
+
+ _UDC_7S[udc_idx] = LO(udc_data);
+}
+
+/** Write a single character (Stream implementation)
+ *
+ */
+int TM1637_EYEWINK::_putc(int value) {
+//The EYEWINK mapping between Digit positions (Left to Right) and Grids is:
+// GR1 GR2 GR3 GR4 GR5 GR6
+//The memory addresses or column numbers are:
+// 0 1 2 3 4 5
+//The Grids for all digits:
+// const int col2addr[] = {0, 1, 2, 3, 4, 5};
+
+ 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 = col2addr [_column - 1];
+ addr = _column - 1;
+
+ //Save icons...and set bits for decimal point to write
+ _displaybuffer[addr] = _displaybuffer[addr] | pattern;
+// writeData(_displaybuffer, (EYEWINK_NR_GRIDS * TM1637_BYTES_PER_GRID));
+ writeData(_displaybuffer, TM1637_BYTES_PER_GRID, addr);
+
+ //No Cursor Update
+ }
+ }
+ else if ((value >= 0) && (value < EYEWINK_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 = col2addr[_column];
+ addr = _column;
+
+ //Save icons...and set bits for character to write
+ _displaybuffer[addr] = (_displaybuffer[addr] & MASK_ICON_GRID[_column]) | pattern;
+
+// writeData(_displaybuffer, (EYEWINK_NR_GRIDS * TM1637_BYTES_PER_GRID));
+ writeData(_displaybuffer, TM1637_BYTES_PER_GRID, addr);
+
+ //Update Cursor
+ _column++;
+ if (_column > (EYEWINK_NR_DIGITS - 1)) {
+ _column = 0;
+ }
+
+ } // if validChar
+
+ return value;
+}
+
+
+// get a single character (Stream implementation)
+int TM1637_EYEWINK::_getc() {
+ return -1;
+}
+
+#endif
\ No newline at end of file
TM1637 LED controller (48 LEDs max), Keyboard scan (16 keys max)