Princeton PT6964 LED controller supports 4 Digits @ 13 Segments, 5 Digits @ 12 Segments, 6 Digits @ 11 Segments or 7 Digits @ 10 Segments. Also supports a scanned keyboard of upto 20 keys. SPI bus interface.
Princeton PT6964 LED controller supports 4 Digits @ 13 Segments, 5 Digits @ 12 Segments, 6 Digits @ 11 Segments or 7 Digits @ 10 Segments. Also supports a scanned keyboard of upto 20 keys. SPI bus interface.
See Component page here.
PT6964.cpp
- Committer:
- wim
- Date:
- 2016-01-14
- Revision:
- 2:eaf2f5d1af34
- Parent:
- 1:1adf993a3e34
File content as of revision 2:eaf2f5d1af34:
/* mbed PT6964 Library, for PT6964 LED controller * Copyright (c) 2015, v01: WH, Initial version * 2015, v02: WH, rename Digit/Grid * 2016, v03: WH, updated Icon handling, UDCs and _putc() * 2016, v04: WH, Refactored display and keyboard defines * * 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 "mbed.h" #include "PT6964.h" #include "Font_7Seg.h" /** Constructor for class for driving PT6964 LED controller with SPI bus interface device. * Note: the PT6964 is also available from other chipvendors eg AIP1628, HT1628, CM1628, SM1628 * @brief Supports 4 digits @ 13 segments or 5 digits @ 12 segments or 6 Digits @ 11 Segments or 7 Digits @ 10 Segments. * Also supports a scanned keyboard of upto 20 keys. * * @param PinName mosi, miso, sclk, cs SPI bus pins * @param Mode selects either 6 Digits of 12 Segments or 7 Digits of 10 Segments (default) */ PT6964::PT6964(PinName mosi, PinName miso, PinName sclk, PinName cs, Mode mode) : _spi(mosi,miso,sclk), _cs(cs), _mode(mode) { _init(); } /** Init the SPI interface and the controller * @param none * @return none */ void PT6964::_init(){ //init SPI _cs=1; _spi.format(8,3); //PT6964 uses mode 3 (Clock High on Idle, Data latched on second (=rising) edge) _spi.frequency(500000); //init controller _writeCmd(PT6964_MODE_SET_CMD, _mode); // Mode set command _display = PT6964_DSP_ON; _bright = PT6964_BRT_DEF; _writeCmd(PT6964_DSP_CTRL_CMD, _display | _bright ); // Display control cmd, display on/off, brightness _writeCmd(PT6964_DATA_SET_CMD, PT6964_DATA_WR | PT6964_ADDR_INC | PT6964_MODE_NORM); // Data set cmd, normal mode, auto incr, write data } /** Clear the screen and locate to 0 */ void PT6964::cls() { _cs=0; wait_us(1); _spi.write(_flip(PT6964_ADDR_SET_CMD | 0x00)); // Address set cmd, 0 for (int cnt=0; cnt<PT6964_DISPLAY_MEM; cnt++) { _spi.write(0x00); // data } wait_us(1); _cs=1; } /** Set Brightness * * @param char brightness (3 significant bits, valid range 0..7 (1/16 .. 14/14 dutycycle) * @return none */ void PT6964::setBrightness(char brightness){ _bright = brightness & PT6964_BRT_MSK; // mask invalid bits _writeCmd(PT6964_DSP_CTRL_CMD, _display | _bright ); // Display control cmd, display on/off, brightness } /** Set the Display mode On/off * * @param bool display mode */ void PT6964::setDisplay(bool on) { if (on) { _display = PT6964_DSP_ON; } else { _display = PT6964_DSP_OFF; } _writeCmd(PT6964_DSP_CTRL_CMD, _display | _bright ); // Display control cmd, display on/off, brightness } /** Write databyte to PT6964 * @param int address display memory location to write byte * @param char data byte written at given address * @return none */ void PT6964::writeData(int address, char data) { _cs=0; wait_us(1); _spi.write(_flip(PT6964_ADDR_SET_CMD | (address & PT6964_ADDR_MSK))); // Set Address cmd _spi.write(_flip(data)); // data wait_us(1); _cs=1; } /** Write Display datablock to PT6964 * @param DisplayData_t data Array of PT6964_DISPLAY_MEM (=14) bytes for displaydata (starting at address 0) * @param length number bytes to write (valide range 0..PT6964_DISPLAY_MEM (=14), starting at address 0) * @return none */ void PT6964::writeData(DisplayData_t data, int length) { _cs=0; wait_us(1); _spi.write(_flip(PT6964_ADDR_SET_CMD | 0x00)); // Set Address at 0 // sanity check if (length < 0) {length = 0;} if (length > PT6964_DISPLAY_MEM) {length = PT6964_DISPLAY_MEM;} // for (int idx=0; idx<PT6964_DISPLAY_MEM; idx++) { for (int idx=0; idx<length; idx++) { _spi.write(_flip(data[idx])); // data } wait_us(1); _cs=1; } /** Read keydata block from PT6964 * @param *keydata Ptr to Array of PT6964_KEY_MEM (=5) bytes for keydata * @return bool keypress True when at least one key was pressed * * Note: Due to the hardware configuration the PT6964 key matrix scanner will detect multiple keys pressed at same time, * but this may also result in some spurious keys being set in keypress data array. * It may be best to ignore all keys in those situations. That option is implemented in this method depending on #define setting. */ bool PT6964::getKeys(KeyData_t *keydata) { int keypress = 0; char data; // Read keys _cs=0; wait_us(1); // Enable Key Read mode _spi.write(_flip(PT6964_DATA_SET_CMD | PT6964_KEY_RD | PT6964_ADDR_INC | PT6964_MODE_NORM)); // Data set cmd, normal mode, auto incr, read data for (int idx=0; idx < PT6964_KEY_MEM; idx++) { data = _flip(_spi.write(0xFF)); // read keys and correct bitorder data = data & PT6964_KEY_MSK; // Mask valid bits if (data != 0) { // Check for any pressed key for (int bit=0; bit < 8; bit++) { if (data & (1 << bit)) {keypress++;} // Test all significant bits } } (*keydata)[idx] = data; // Store keydata after correcting bitorder } wait_us(1); _cs=1; // Restore Data Write mode _writeCmd(PT6964_DATA_SET_CMD, PT6964_DATA_WR | PT6964_ADDR_INC | PT6964_MODE_NORM); // Data set cmd, normal mode, auto incr, write data #if(1) // Dismiss multiple keypresses at same time return (keypress == 1); #else // Allow multiple keypress and accept possible spurious keys return (keypress > 0); #endif } /** Helper to reverse all command or databits. The PT6964 expects LSB first, whereas SPI is MSB first * @param char data * @return bitreversed data */ char PT6964::_flip(char data) { char value=0; if (data & 0x01) {value |= 0x80;} ; if (data & 0x02) {value |= 0x40;} ; if (data & 0x04) {value |= 0x20;} ; if (data & 0x08) {value |= 0x10;} ; if (data & 0x10) {value |= 0x08;} ; if (data & 0x20) {value |= 0x04;} ; if (data & 0x40) {value |= 0x02;} ; if (data & 0x80) {value |= 0x01;} ; return value; } /** Write command and parameter to PT6964 * @param int cmd Command byte * &Param int data Parameters for command * @return none */ void PT6964::_writeCmd(int cmd, int data){ _cs=0; wait_us(1); // _spi.write(_flip( (cmd & 0xF0) | (data & 0x0F))); _spi.write(_flip( (cmd & PT6964_CMD_MSK) | (data & ~PT6964_CMD_MSK))); wait_us(1); _cs=1; } /** Constructor for class for driving Princeton PT6964 controller as used in DVD538A * * @brief Supports 4 Digits of 7 Segments, 1 Grid of 9 Icons. Also supports a scanned keyboard of 4. * * @param PinName mosi, miso, sclk, cs SPI bus pins */ PT6964_DVD538A::PT6964_DVD538A(PinName mosi, PinName miso, PinName sclk, PinName cs) : PT6964(mosi, miso, sclk, cs, Grid7_Seg10) { _column = 0; _columns = DVD538A_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 PT6964_DVD538A::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 PT6964_DVD538A::columns() { return _columns; } /** Clear the screen and locate to 0 * @param bool clrAll Clear Icons also (default = false) */ void PT6964_DVD538A::cls(bool clrAll) { if (clrAll) { //clear local buffer (including Icons) for (int idx=0; idx < (DVD538A_NR_GRIDS << 1); idx++) { // * PT6964_BYTES_PER_GRID _displaybuffer[idx] = 0x00; } } else { //clear local buffer (preserving Icons) for (int idx=0; idx < DVD538A_NR_GRIDS; idx++) { _displaybuffer[(idx<<1)] = _displaybuffer[(idx<<1)] & MASK_ICON_GRID[idx][0]; _displaybuffer[(idx<<1) + 1] = _displaybuffer[(idx<<1) + 1] & MASK_ICON_GRID[idx][1]; } } writeData(_displaybuffer, (DVD538A_NR_GRIDS * PT6964_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 PT6964_DVD538A::setIcon(Icon icon) { int addr, icn; icn = icon & 0xFFFF; addr = (icon >> 24) & 0xFF; addr = (addr - 1) << 1; // * PT6964_BYTES_PER_GRID //Save char...and set bits for icon to write _displaybuffer[addr] = _displaybuffer[addr] | LO(icn); _displaybuffer[addr+1] = _displaybuffer[addr+1] | HI(icn); writeData(_displaybuffer, (DVD538A_NR_GRIDS * PT6964_BYTES_PER_GRID)); } /** Clr Icon * * @param Icon icon Enums Icon has Grid position encoded in 8 MSBs, Icon pattern encoded in 16 LSBs * @return none */ void PT6964_DVD538A::clrIcon(Icon icon) { int addr, icn; icn = icon & 0xFFFF; addr = (icon >> 24) & 0xFF; addr = (addr - 1) << 1; // * PT6964_BYTES_PER_GRID //Save char...and clr bits for icon to write _displaybuffer[addr] = _displaybuffer[addr] & ~LO(icn); _displaybuffer[addr+1] = _displaybuffer[addr+1] & ~HI(icn); writeData(_displaybuffer, (DVD538A_NR_GRIDS * PT6964_BYTES_PER_GRID)); } /** 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 (16 bits) */ void PT6964_DVD538A::setUDC(unsigned char udc_idx, int udc_data) { //Sanity check if (udc_idx > (DVD538A_NR_UDC-1)) { return; } // Mask out Icon bits? _UDC_7S[udc_idx] = udc_data; } /** Write a single character (Stream implementation) */ int PT6964_DVD538A::_putc(int value) { int addr; bool validChar = false; short pattern = 0x0000; if ((value == '\n') || (value == '\r')) { //No character to write validChar = false; //Update Cursor _column = 0; } else if (value == '-') { //No character to write validChar = true; pattern = C7_MIN; } else if ((value >= 0) && (value < DVD538A_NR_UDC)) { //Character to write validChar = true; pattern = _UDC_7S[value]; } 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 if (validChar) { //Character to write //Translate between _column and displaybuffer entries //_column == 0 => Grid5 => addr = 8 //_column == 1 => Grid4 => addr = 6 //_column == 2 => Grid3 => addr = 4 //_column == 3 => Grid4 => addr = 2 addr = (4 - _column) << 1; // * PT6964_BYTES_PER_GRID //Save icons...and set bits for character to write _displaybuffer[addr] = (_displaybuffer[addr] & MASK_ICON_GRID[4 - _column][0]) | LO(pattern); _displaybuffer[addr+1] = (_displaybuffer[addr+1] & MASK_ICON_GRID[4 - _column][1]) | HI(pattern); writeData(_displaybuffer, (DVD538A_NR_GRIDS * PT6964_BYTES_PER_GRID)); //Update Cursor _column++; if (_column > (DVD538A_NR_DIGITS - 1)) { _column = 0; } } // if validChar return value; } // get a single character (Stream implementation) int PT6964_DVD538A::_getc() { return -1; }