thomas ya
for
Dependents: LV_FGSE_Controller_Interface
Diff: TextLCD.cpp
- Revision:
- 37:ce348c002929
- Parent:
- 36:9f5f86dfd44a
- Child:
- 38:cbe275b0b647
--- a/TextLCD.cpp Tue Nov 25 19:21:18 2014 +0000
+++ b/TextLCD.cpp Sun Mar 29 13:08:03 2015 +0000
@@ -1,4 +1,4 @@
-/* mbed TextLCD Library, for a 4-bit LCD based on HD44780
+/* mbed TextLCD Library, for LCDs based on HD44780 controllers
* Copyright (c) 2007-2010, sford, http://mbed.org
* 2013, v01: WH, Added LCD types, fixed LCD address issues, added Cursor and UDCs
* 2013, v02: WH, Added I2C and SPI bus interfaces
@@ -17,6 +17,7 @@
* added 16 UDCs for supported devices (eg PCF2103), moved UDC defines to TextLCD_UDC file, added TextLCD_Config.h for feature and footprint settings.
* 2014, v15: WH, Added AC780 support, added I2C expander modules, fixed setBacklight() for inverted logic modules. Fixed bug in LCD_SPI_N define
* 2014, v16: WH, Added ST7070 and KS0073 support, added setIcon(), clrIcon() and setInvert() method for supported devices
+ * 2015, v17: WH, Clean up low-level _writeCommand() and _writeData(), Added support for alternative fonttables (eg PCF21XX), Added ST7066_ACM controller for ACM1602 module
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
@@ -57,6 +58,9 @@
// Addressing mode encoded in b19..b16
_addr_mode = _type & LCD_T_ADR_MSK;
+
+ // Font table, encoded in LCDCtrl
+ _font = _type & LCD_C_FNT_MSK;
}
/** Init the LCD Controller(s)
@@ -100,33 +104,35 @@
wait_ms(20); // Wait 20ms to ensure powered up
- // The Controller could be in 8 bit mode (power-on reset) or in 4 bit mode (warm reboot) at this point.
- // Follow this procedure to make sure the Controller enters the correct state. The hardware interface
- // between the uP and the LCD can only write the 4 most significant bits (Most Significant Nibble, MSN).
- // In 4 bit mode the LCD expects the MSN first, followed by the LSN.
- //
- // Current state: 8 bit mode | 4 bit mode, MSN is next | 4 bit mode, LSN is next
- //-------------------------------------------------------------------------------------------------
- _writeNibble(0x3); // set 8 bit mode (MSN) and dummy LSN, | set 8 bit mode (MSN), | set dummy LSN,
- // remains in 8 bit mode | change to 8 bit mode | remains in 4 bit mode
- wait_ms(15); //
+ if (dl == _LCD_DL_4) {
+ // The Controller could be in 8 bit mode (power-on reset) or in 4 bit mode (warm reboot) at this point.
+ // Follow this procedure to make sure the Controller enters the correct state. The hardware interface
+ // between the uP and the LCD can only write the 4 most significant bits (Most Significant Nibble, MSN).
+ // In 4 bit mode the LCD expects the MSN first, followed by the LSN.
+ //
+ // Current state: 8 bit mode | 4 bit mode, MSN is next | 4 bit mode, LSN is next
+ //-------------------------------------------------------------------------------------------------
+ _writeNibble(0x3); // set 8 bit mode (MSN) and dummy LSN, | set 8 bit mode (MSN), | set dummy LSN,
+ // remains in 8 bit mode | change to 8 bit mode | remains in 4 bit mode
+ wait_ms(15); //
+
+ _writeNibble(0x3); // set 8 bit mode and dummy LSN, | set 8 bit mode and dummy LSN, | set 8bit mode (MSN),
+ // remains in 8 bit mode | remains in 8 bit mode | remains in 4 bit mode
+ wait_ms(15); //
- _writeNibble(0x3); // set 8 bit mode and dummy LSN, | set 8 bit mode and dummy LSN, | set 8bit mode (MSN),
- // remains in 8 bit mode | remains in 8 bit mode | remains in 4 bit mode
- wait_ms(15); //
-
- _writeNibble(0x3); // set 8 bit mode and dummy LSN, | set 8 bit mode and dummy LSN, | set dummy LSN,
- // remains in 8 bit mode | remains in 8 bit mode | change to 8 bit mode
- wait_ms(15); //
-
- // Controller is now in 8 bit mode
-
- _writeNibble(0x2); // Change to 4-bit mode (MSN), the LSN is undefined dummy
- wait_us(40); // most instructions take 40us
-
- // Display is now in 4-bit mode
- // Note: 4/8 bit mode is ignored for most native SPI and I2C devices. They dont use the parallel bus.
- // However, _writeNibble() method is void anyway for native SPI and I2C devices.
+ _writeNibble(0x3); // set 8 bit mode and dummy LSN, | set 8 bit mode and dummy LSN, | set dummy LSN,
+ // remains in 8 bit mode | remains in 8 bit mode | change to 8 bit mode
+ wait_ms(15); //
+
+ // Controller is now in 8 bit mode
+
+ _writeNibble(0x2); // Change to 4-bit mode (MSN), the LSN is undefined dummy
+ wait_us(40); // most instructions take 40us
+
+ // Controller is now in 4-bit mode
+ // Note: 4/8 bit mode is ignored for most native SPI and I2C devices. They dont use the parallel bus.
+ // However, _writeNibble() method is void anyway for native SPI and I2C devices.
+ }
// Device specific initialisations: DC/DC converter to generate VLCD or VLED, number of lines etc
switch (_ctrl) {
@@ -1193,6 +1199,7 @@
_writeCommand(0x20 | _function | ((~_contrast) >> 4)); // Invert and shift to use 2 MSBs
break; // case PT6314 Controller (VFD)
+ case ST7066_ACM: // ST7066 4/8 bit, I2C on ACM1602 using a PIC
default:
// Devices fully compatible to HD44780 that do not use any DC/DC Voltage converters but external VLCD, no icons etc
@@ -1329,9 +1336,12 @@
}
}
else {
- //Character to write
- _writeData(value);
-
+ //Character to write
+#if (LCD_DEFAULT_FONT == 1)
+ _writeData(value);
+#else
+ _writeData(ASCII_2_LCD(value));
+#endif
//Update Cursor
_column++;
if (_column >= columns()) {
@@ -1356,6 +1366,30 @@
return -1;
}
+/** Convert ASCII character code to the LCD fonttable code
+ *
+ * @param c The character to write to the display
+ * @return The character code for the specific fonttable of the controller
+ */
+int TextLCD_Base::ASCII_2_LCD (int c) {
+
+//LCD_C_FT0 is default for HD44780 and compatible series
+ if (_font == LCD_C_FT0) return c;
+
+//LCD_C_FT1 for PCF21XXC series
+//Used code from Suga koubou library for PCF2119
+ if (((c >= ' ') && (c <= '?')) || ((c >= 'A') && (c <= 'Z')) || ((c >= 'a') && (c <= 'z'))) {
+ c |= 0x80;
+ } else if (c >= 0xf0 && c <= 0xff) {
+ c &= 0x0f;
+ }
+ return c;
+
+//LCD_C_FT2 ...
+//@TODO add more, eg cyrillic
+//@TODO add method to switch between fonts for controllers that support this
+}
+
#if(LCD_PRINTF != 1)
/** Write a character to the LCD
@@ -1383,17 +1417,15 @@
#endif
-
// Write a nibble using the 4-bit interface
void TextLCD_Base::_writeNibble(int value) {
// Enable is Low
this->_setEnable(true);
- this->_setData(value & 0x0F); // Low nibble
+ this->_setData(value); // Low nibble
wait_us(1); // Data setup time
this->_setEnable(false);
wait_us(1); // Datahold time
-
// Enable is Low
}
@@ -1408,7 +1440,7 @@
wait_us(1); // Data hold time
this->_setEnable(true);
- this->_setData(value >> 0); // Low nibble
+ this->_setData(value); // Low nibble
wait_us(1); // Data setup time
this->_setEnable(false);
wait_us(1); // Datahold time
@@ -2644,8 +2676,8 @@
// No Hardware Enable pin
_e2 = NULL; //Construct dummy pin
}
-
- _init();
+
+ _init(_LCD_DL_4); // Set Datalength to 4 bit for mbed bus interfaces
}
/** Destruct a TextLCD interface for using regular mbed pins
@@ -2742,23 +2774,27 @@
#if (MCP23008==1)
// MCP23008 portexpander Init
- _write_register(IODIR, 0x00); // All outputs
- _write_register(IPOL, 0x00); // No reverse polarity
- _write_register(GPINTEN, 0x00); // No interrupt
- _write_register(DEFVAL, 0x00); // Default value to compare against for interrupts
- _write_register(INTCON, 0x00); // No interrupt on changes
- _write_register(IOCON, 0x00); // Interrupt polarity
- _write_register(GPPU, 0x00); // No Pullup
- _write_register(INTF, 0x00); //
- _write_register(INTCAP, 0x00); //
- _write_register(GPIO, 0x00); // Output/Input pins
- _write_register(OLAT, 0x00); // Output Latch
+ _writeRegister(IODIR, 0x00); // All pins are outputs
+ _writeRegister(IPOL, 0x00); // No reverse polarity on inputs
+ _writeRegister(GPINTEN, 0x00); // No interrupt on change of input pins
+ _writeRegister(DEFVAL, 0x00); // Default value to compare against for interrupts
+ _writeRegister(INTCON, 0x00); // No interrupt on changes, compare against previous pin value
+ _writeRegister(IOCON, 0x20); // b1=0 - Interrupt polarity active low
+ // b2=0 - Interrupt pin active driver output
+ // b4=0 - Slew rate enable on SDA
+ // b5=0 - Auto-increment on registeraddress
+ // b5=1 - No auto-increment on registeraddress => needed for performance improved I2C expander mode
+ _writeRegister(GPPU, 0x00); // No Pullup
+// INTF // Interrupt flags read (Read-Only)
+// INTCAP // Captured inputpins at time of interrupt (Read-Only)
+// _writeRegister(GPIO, 0x00); // Output/Input pins
+// _writeRegister(OLAT, 0x00); // Output Latch
// Init the portexpander bus
_lcd_bus = D_LCD_BUS_DEF;
// write the new data to the portexpander
- _write_register(GPIO, _lcd_bus);
+ _writeRegister(GPIO, _lcd_bus);
#else
// PCF8574 of PCF8574A portexpander
@@ -2769,12 +2805,12 @@
_i2c->write(_slaveAddress, &_lcd_bus, 1);
#endif
- _init();
+ _init(_LCD_DL_4); // Set Datalength to 4 bit for all serial expander interfaces
}
-// Set E pin (or E2 pin)
-// Used for mbed pins, I2C bus expander or SPI shiftregister
-void TextLCD_I2C::_setEnable(bool value) {
+// Set E bit (or E2 bit) in the databus shadowvalue
+// Used for mbed I2C bus expander
+void TextLCD_I2C::_setEnableBit(bool value) {
if(_ctrl_idx==_LCDCtrl_0) {
if (value) {
@@ -2792,12 +2828,20 @@
_lcd_bus &= ~D_LCD_E2; // Reset E2bit
}
}
+}
+
+// Set E pin (or E2 pin)
+// Used for mbed pins, I2C bus expander or SPI shiftregister
+void TextLCD_I2C::_setEnable(bool value) {
+
+ // Place the E or E2 bit data on the databus shadowvalue
+ _setEnableBit(value);
#if (MCP23008==1)
// MCP23008 portexpander
// write the new data to the portexpander
- _write_register(GPIO, _lcd_bus);
+ _writeRegister(GPIO, _lcd_bus);
#else
// PCF8574 of PCF8574A portexpander
@@ -2806,6 +2850,7 @@
#endif
}
+
// Set RS pin
// Used for mbed pins, I2C bus expander or SPI shiftregister
void TextLCD_I2C::_setRS(bool value) {
@@ -2821,7 +2866,7 @@
// MCP23008 portexpander
// write the new data to the portexpander
- _write_register(GPIO, _lcd_bus);
+ _writeRegister(GPIO, _lcd_bus);
#else
// PCF8574 of PCF8574A portexpander
@@ -2845,7 +2890,63 @@
// MCP23008 portexpander
// write the new data to the portexpander
- _write_register(GPIO, _lcd_bus);
+ _writeRegister(GPIO, _lcd_bus);
+#else
+ // PCF8574 of PCF8574A portexpander
+
+ // write the new data to the I2C portexpander
+ _i2c->write(_slaveAddress, &_lcd_bus, 1);
+#endif
+}
+
+
+// Place the 4bit data in the databus shadowvalue
+// Used for mbed I2C bus expander
+void TextLCD_I2C::_setDataBits(int value) {
+
+ // Set bit by bit to support any mapping of expander portpins to LCD pins
+ if (value & 0x01){
+ _lcd_bus |= D_LCD_D4; // Set Databit
+ }
+ else {
+ _lcd_bus &= ~D_LCD_D4; // Reset Databit
+ }
+
+ if (value & 0x02){
+ _lcd_bus |= D_LCD_D5; // Set Databit
+ }
+ else {
+ _lcd_bus &= ~D_LCD_D5; // Reset Databit
+ }
+
+ if (value & 0x04) {
+ _lcd_bus |= D_LCD_D6; // Set Databit
+ }
+ else {
+ _lcd_bus &= ~D_LCD_D6; // Reset Databit
+ }
+
+ if (value & 0x08) {
+ _lcd_bus |= D_LCD_D7; // Set Databit
+ }
+ else {
+ _lcd_bus &= ~D_LCD_D7; // Reset Databit
+ }
+}
+
+// Place the 4bit data on the databus
+// Used for mbed pins, I2C bus expander or SPI shifregister
+void TextLCD_I2C::_setData(int value) {
+
+ // Place the 4bit data on the databus shadowvalue
+ _setDataBits(value);
+
+ // Place the 4bit data on the databus
+#if (MCP23008==1)
+ // MCP23008 portexpander
+
+ // write the new data to the portexpander
+ _writeRegister(GPIO, _lcd_bus);
#else
// PCF8574 of PCF8574A portexpander
@@ -2854,65 +2955,207 @@
#endif
}
+// Write data to MCP23008 I2C portexpander
+// Used for mbed I2C bus expander
+void TextLCD_I2C::_writeRegister (int reg, int value) {
+ char data[] = {reg, value};
+
+ _i2c->write(_slaveAddress, data, 2);
+}
+
+//New optimized
+//Test faster _writeByte 0.11s vs 0.27s for a 20x4 fillscreen (PCF8574)
+//Test faster _writeByte 0.14s vs 0.34s for a 20x4 fillscreen (MCP23008)
+
+// Write a byte using I2C
+void TextLCD_I2C::_writeByte(int value) {
+ char data[6];
+
+#if (MCP23008==1)
+ // MCP23008 portexpander
+
+ data[0] = GPIO; // set registeraddres
+ // Note: auto-increment is disabled so all data will go to GPIO register
+
+ _setEnableBit(true); // set E
+ _setDataBits(value >> 4); // set data high
+ data[1] = _lcd_bus;
+
+ _setEnableBit(false); // clear E
+ data[2] = _lcd_bus;
+
+ _setEnableBit(true); // set E
+ _setDataBits(value); // set data low
+ data[3] = _lcd_bus;
+
+ _setEnableBit(false); // clear E
+ data[4] = _lcd_bus;
+
+ // write the packed data to the I2C portexpander
+ _i2c->write(_slaveAddress, data, 5);
+#else
+ // PCF8574 of PCF8574A portexpander
+
+ _setEnableBit(true); // set E
+ _setDataBits(value >> 4); // set data high
+ data[0] = _lcd_bus;
+
+ _setEnableBit(false); // clear E
+ data[1] = _lcd_bus;
+
+ _setEnableBit(true); // set E
+ _setDataBits(value); // set data low
+ data[2] = _lcd_bus;
+
+ _setEnableBit(false); // clear E
+ data[3] = _lcd_bus;
+
+ // write the packed data to the I2C portexpander
+ _i2c->write(_slaveAddress, data, 4);
+#endif
+}
+
+#endif /* I2C Expander PCF8574/MCP23008 */
+//---------- End TextLCD_I2C ------------
+
+
+//--------- Start TextLCD_SPI -----------
+#if(LCD_SPI == 1) /* SPI Expander SN74595 */
+
+ /** Create a TextLCD interface using an SPI 74595 portexpander
+ *
+ * @param spi SPI Bus
+ * @param cs chip select pin (active low)
+ * @param type Sets the panel size/addressing mode (default = LCD16x2)
+ * @param ctrl LCD controller (default = HD44780)
+ */
+TextLCD_SPI::TextLCD_SPI(SPI *spi, PinName cs, LCDType type, LCDCtrl ctrl) :
+ TextLCD_Base(type, ctrl),
+ _spi(spi),
+ _cs(cs) {
+
+ // Init cs
+ _cs = 1;
+
+ // Setup the spi for 8 bit data, low steady state clock,
+ // rising edge capture, with a 500KHz or 1MHz clock rate
+ _spi->format(8,0);
+ _spi->frequency(500000);
+ //_spi.frequency(1000000);
+
+ // Init the portexpander bus
+ _lcd_bus = D_LCD_BUS_DEF;
+
+ // write the new data to the portexpander
+ _cs = 0;
+ _spi->write(_lcd_bus);
+ _cs = 1;
+
+ _init(_LCD_DL_4); // Set Datalength to 4 bit for all serial expander interfaces
+}
+
+// Set E pin (or E2 pin)
+// Used for mbed pins, I2C bus expander or SPI shiftregister
+void TextLCD_SPI::_setEnable(bool value) {
+
+ if(_ctrl_idx==_LCDCtrl_0) {
+ if (value) {
+ _lcd_bus |= D_LCD_E; // Set E bit
+ }
+ else {
+ _lcd_bus &= ~D_LCD_E; // Reset E bit
+ }
+ }
+ else {
+ if (value) {
+ _lcd_bus |= D_LCD_E2; // Set E2 bit
+ }
+ else {
+ _lcd_bus &= ~D_LCD_E2; // Reset E2 bit
+ }
+ }
+
+ // write the new data to the SPI portexpander
+ _cs = 0;
+ _spi->write(_lcd_bus);
+ _cs = 1;
+}
+
+// Set RS pin
+// Used for mbed pins, I2C bus expander or SPI shiftregister and SPI_N
+void TextLCD_SPI::_setRS(bool value) {
+
+ if (value) {
+ _lcd_bus |= D_LCD_RS; // Set RS bit
+ }
+ else {
+ _lcd_bus &= ~D_LCD_RS; // Reset RS bit
+ }
+
+ // write the new data to the SPI portexpander
+ _cs = 0;
+ _spi->write(_lcd_bus);
+ _cs = 1;
+}
+
+// Set BL pin
+// Used for mbed pins, I2C bus expander or SPI shiftregister
+void TextLCD_SPI::_setBL(bool value) {
+
+ if (value) {
+ _lcd_bus |= D_LCD_BL; // Set BL bit
+ }
+ else {
+ _lcd_bus &= ~D_LCD_BL; // Reset BL bit
+ }
+
+ // write the new data to the SPI portexpander
+ _cs = 0;
+ _spi->write(_lcd_bus);
+ _cs = 1;
+}
// Place the 4bit data on the databus
-// Used for mbed pins, I2C bus expander or SPI shifregister
-void TextLCD_I2C::_setData(int value) {
- int data;
+// Used for mbed pins, I2C bus expander or SPI shiftregister
+void TextLCD_SPI::_setData(int value) {
// Set bit by bit to support any mapping of expander portpins to LCD pins
-
- data = value & 0x0F;
- if (data & 0x01){
+ if (value & 0x01) {
_lcd_bus |= D_LCD_D4; // Set Databit
}
- else {
- _lcd_bus &= ~D_LCD_D4; // Reset Databit
- }
-
- if (data & 0x02){
+ else {
+ _lcd_bus &= ~D_LCD_D4; // Reset Databit
+ }
+
+ if (value & 0x02) {
_lcd_bus |= D_LCD_D5; // Set Databit
}
else {
- _lcd_bus &= ~D_LCD_D5; // Reset Databit
- }
-
- if (data & 0x04) {
+ _lcd_bus &= ~D_LCD_D5; // Reset Databit
+ }
+
+ if (value & 0x04) {
_lcd_bus |= D_LCD_D6; // Set Databit
}
- else {
- _lcd_bus &= ~D_LCD_D6; // Reset Databit
- }
-
- if (data & 0x08) {
+ else {
+ _lcd_bus &= ~D_LCD_D6; // Reset Databit
+ }
+
+ if (value & 0x08) {
_lcd_bus |= D_LCD_D7; // Set Databit
}
else {
_lcd_bus &= ~D_LCD_D7; // Reset Databit
}
-#if (MCP23008==1)
- // MCP23008 portexpander
-
- // write the new data to the portexpander
- _write_register(GPIO, _lcd_bus);
-#else
- // PCF8574 of PCF8574A portexpander
-
- // write the new data to the I2C portexpander
- _i2c->write(_slaveAddress, &_lcd_bus, 1);
-#endif
-
+ // write the new data to the SPI portexpander
+ _cs = 0;
+ _spi->write(_lcd_bus);
+ _cs = 1;
}
-// Write data to MCP23008 I2C portexpander
-void TextLCD_I2C::_write_register (int reg, int value) {
- char data[] = {reg, value};
-
- _i2c->write(_slaveAddress, data, 2);
-}
-#endif /* I2C Expander PCF8574/MCP23008 */
-//---------- End TextLCD_I2C ------------
+#endif /* SPI Expander SN74595 */
+//---------- End TextLCD_SPI ------------
//--------- Start TextLCD_I2C_N ---------
@@ -3015,6 +3258,7 @@
_i2c->write(_slaveAddress, data, 2);
#else
//Controllers that dont support ACK
+//Note: This may be issue with some mbed platforms that dont fully/correctly support I2C byte operations.
_i2c->start();
_i2c->write(_slaveAddress);
_i2c->write(data[0]);
@@ -3026,159 +3270,6 @@
//-------- End TextLCD_I2C_N ------------
-//--------- Start TextLCD_SPI -----------
-#if(LCD_SPI == 1) /* SPI Expander SN74595 */
-
- /** Create a TextLCD interface using an SPI 74595 portexpander
- *
- * @param spi SPI Bus
- * @param cs chip select pin (active low)
- * @param type Sets the panel size/addressing mode (default = LCD16x2)
- * @param ctrl LCD controller (default = HD44780)
- */
-TextLCD_SPI::TextLCD_SPI(SPI *spi, PinName cs, LCDType type, LCDCtrl ctrl) :
- TextLCD_Base(type, ctrl),
- _spi(spi),
- _cs(cs) {
-
- // Init cs
- _setCS(true);
-
- // Setup the spi for 8 bit data, low steady state clock,
- // rising edge capture, with a 500KHz or 1MHz clock rate
- _spi->format(8,0);
- _spi->frequency(500000);
- //_spi.frequency(1000000);
-
- // Init the portexpander bus
- _lcd_bus = D_LCD_BUS_DEF;
-
- // write the new data to the portexpander
- _setCS(false);
- _spi->write(_lcd_bus);
- _setCS(true);
-
- _init();
-}
-
-// Set E pin (or E2 pin)
-// Used for mbed pins, I2C bus expander or SPI shiftregister
-void TextLCD_SPI::_setEnable(bool value) {
-
- if(_ctrl_idx==_LCDCtrl_0) {
- if (value) {
- _lcd_bus |= D_LCD_E; // Set E bit
- }
- else {
- _lcd_bus &= ~D_LCD_E; // Reset E bit
- }
- }
- else {
- if (value) {
- _lcd_bus |= D_LCD_E2; // Set E2 bit
- }
- else {
- _lcd_bus &= ~D_LCD_E2; // Reset E2 bit
- }
- }
-
- // write the new data to the SPI portexpander
- _setCS(false);
- _spi->write(_lcd_bus);
- _setCS(true);
-}
-
-// Set RS pin
-// Used for mbed pins, I2C bus expander or SPI shiftregister and SPI_N
-void TextLCD_SPI::_setRS(bool value) {
-
- if (value) {
- _lcd_bus |= D_LCD_RS; // Set RS bit
- }
- else {
- _lcd_bus &= ~D_LCD_RS; // Reset RS bit
- }
-
- // write the new data to the SPI portexpander
- _setCS(false);
- _spi->write(_lcd_bus);
- _setCS(true);
-}
-
-// Set BL pin
-// Used for mbed pins, I2C bus expander or SPI shiftregister
-void TextLCD_SPI::_setBL(bool value) {
-
- if (value) {
- _lcd_bus |= D_LCD_BL; // Set BL bit
- }
- else {
- _lcd_bus &= ~D_LCD_BL; // Reset BL bit
- }
-
- // write the new data to the SPI portexpander
- _setCS(false);
- _spi->write(_lcd_bus);
- _setCS(true);
-}
-
-// Place the 4bit data on the databus
-// Used for mbed pins, I2C bus expander or SPI shiftregister
-void TextLCD_SPI::_setData(int value) {
- int data;
-
- // Set bit by bit to support any mapping of expander portpins to LCD pins
-
- data = value & 0x0F;
- if (data & 0x01) {
- _lcd_bus |= D_LCD_D4; // Set Databit
- }
- else {
- _lcd_bus &= ~D_LCD_D4; // Reset Databit
- }
-
- if (data & 0x02) {
- _lcd_bus |= D_LCD_D5; // Set Databit
- }
- else {
- _lcd_bus &= ~D_LCD_D5; // Reset Databit
- }
-
- if (data & 0x04) {
- _lcd_bus |= D_LCD_D6; // Set Databit
- }
- else {
- _lcd_bus &= ~D_LCD_D6; // Reset Databit
- }
-
- if (data & 0x08) {
- _lcd_bus |= D_LCD_D7; // Set Databit
- }
- else {
- _lcd_bus &= ~D_LCD_D7; // Reset Databit
- }
-
- // write the new data to the SPI portexpander
- _setCS(false);
- _spi->write(_lcd_bus);
- _setCS(true);
-}
-
-// Set CS line.
-// Only used for SPI bus
-void TextLCD_SPI::_setCS(bool value) {
-
- if (value) {
- _cs = 1; // Set CS pin
- }
- else {
- _cs = 0; // Reset CS pin
- }
-}
-#endif /* SPI Expander SN74595 */
-//---------- End TextLCD_SPI ------------
-
-
//--------- Start TextLCD_SPI_N ---------
#if(LCD_SPI_N == 1) /* Native SPI bus */
/** Create a TextLCD interface using a controller with a native SPI4 interface
@@ -3202,12 +3293,12 @@
// Setup the spi for 8 bit data, high steady state clock,
// rising edge capture, with a 500KHz or 1MHz clock rate
// _spi->format(8,3);
+// _spi->frequency(500000);
// _spi->frequency(1000000);
// Setup the spi for 8 bit data, low steady state clock,
// rising edge capture, with a 500KHz or 1MHz clock rate
_spi->format(8,0);
-// _spi->frequency(300000);
// _spi->frequency(500000);
_spi->frequency(1000000);
@@ -3292,13 +3383,12 @@
// Setup the spi for 8 bit data, high steady state clock,
// rising edge capture, with a 500KHz or 1MHz clock rate
// _spi->format(8,3);
-// _spi->frequency(300000);
+// _spi->frequency(500000);
// _spi->frequency(1000000);
// Setup the spi for 8 bit data, low steady state clock,
// rising edge capture, with a 500KHz or 1MHz clock rate
_spi->format(8,0);
-// _spi->frequency(300000);
// _spi->frequency(500000);
_spi->frequency(1000000);