Wim Huiskamp
Hello World demo for Enhanced TextLCD lib.
The Enhanced TextLCD lib supports more display types than the original lib. Added support for User Defined Characters (UDCs), Backlight control and other features such as control through I2C and SPI port expanders and controllers with native I2C and SPI interfaces. See here for more info.
Diff: main.cpp
- Revision:
- 0:a75049de1a82
- Child:
- 1:ef419b21167d
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Fri Jun 13 19:02:38 2014 +0000
@@ -0,0 +1,301 @@
+// Hello World! for the TextLCD
+
+#include "mbed.h"
+#include "TextLCD.h"
+
+// Host PC Communication channels
+Serial pc(USBTX, USBRX); // tx, rx
+
+void show_menu() {
+ pc.printf("0: Exit\n\r");
+ pc.printf("1: Show Menu\n\r");
+ pc.printf("2: Goto 0,0\n\r");
+ pc.printf("3: Goto columns(),rows()\n\r");
+ pc.printf("4: cls()\n\r");
+ pc.printf("5: UDCs \n\r");
+ pc.printf("6: Fill\n\r");
+ pc.printf("7: Cursor On\n\r");
+ pc.printf("8: Cursor Off\n\r");
+ pc.printf("9: Text\n\r");
+ pc.printf("A: Display On\n\r");
+ pc.printf("B: Display Off\n\r");
+ pc.printf("C: Backlight On\n\r");
+ pc.printf("D: Backlight Off\n\r");
+ pc.printf("P: \n\r");
+ pc.printf("\n\r");
+}
+
+
+// I2C Communication
+I2C i2c_lcd(p28,p27); // SDA, SCL
+//I2C i2c_lcd(p9,p10); // SDA, SCL
+
+// SPI Communication
+SPI spi_lcd(p5, NC, p7); // MOSI, MISO, SCLK
+//DigitalOut cs(p8);
+//DigitalOut cs2(p9);
+
+//TextLCD lcd2(p15, p16, p17, p18, p19, p20, TextLCD::LCD16x4); // rs, e, d4-d7 =ok
+//TextLCD lcd(p15, p16, p17, p18, p19, p20, TextLCD::LCD20x2); // rs, e, d4-d7 =ok
+//TextLCD lcd(p15, p16, p17, p18, p19, p20, TextLCD::LCD20x4); // rs, e, d4-d7 =ok
+//TextLCD lcd(p15, p16, p17, p18, p19, p20, TextLCD::LCD24x4); // rs, e, d4-d7 =ok
+//TextLCD lcd(p15, p16, p17, p18, p19, p20, TextLCD::LCD24x2); // rs, e, d4-d7 =ok
+//TextLCD lcd(p15, p16, p17, p18, p19, p20, TextLCD::LCD40x2); // rs, e, d4-d7 =ok
+
+//TextLCD_I2C lcd(&i2c_lcd, 0x42, TextLCD::LCD20x4); // I2C bus, PCF8574 Slaveaddress, LCD Type =ok
+//TextLCD_I2C lcd(&i2c_lcd, 0x40, TextLCD::LCD20x4); // I2C bus, PCF8574 Slaveaddress, LCD Type =ok
+
+//Test Adafruit module
+//TextLCD_I2C lcd(&i2c_lcd, MCP23008_SA0, TextLCD::LCD20x4); // I2C bus, MCP23008 Slaveaddress, LCD Type =OK
+
+//TextLCD_I2C lcd(&i2c_lcd, 0x42, TextLCD::LCD16x2, TextLCD::WS0010); // I2C bus, PCF8574 Slaveaddress, LCD Type, LCD Ctrl
+
+//TextLCD_SPI lcd(&spi_lcd, p8, TextLCD::LCD24x4); // SPI bus, CS pin, LCD Type =ok
+//TextLCD_SPI lcd(&spi_lcd, p8, TextLCD::LCD40x2); // SPI bus, CS pin, LCD Type =ok
+//TextLCD_SPI lcd(&spi_lcd, p8, TextLCD::LCD40x4); // SPI bus, CS pin, LCD Type =ok
+
+//TextLCD_SPI lcd(&spi_lcd, p8, TextLCD::LCD40x4, TextLCD::HD44780); // SPI bus, CS pin, LCD Type, LCD Ctrl =ok
+//TextLCD_SPI lcd(&spi_lcd, p8, TextLCD::LCD40x4, TextLCD::WS0010); // SPI bus, CS pin, LCD Type, LCD Ctrl
+
+//TextLCD_SPI lcd2(&spi_lcd, p9, TextLCD::LCD8x2B); // SPI bus, CS pin, LCD Type =ok
+//TextLCD_SPI lcd2(&spi_lcd, p9, TextLCD::LCD16x1); // SPI bus, CS pin, LCD Type =ok
+//TextLCD_SPI lcd2(&spi_lcd, p9, TextLCD::LCD16x2); // SPI bus, CS pin, LCD Type (VFD) =ok
+
+
+TextLCD_SPI_N lcd(&spi_lcd, p8, p9, TextLCD::LCD16x2, NC, TextLCD::ST7032_3V3); // SPI bus, CS pin, RS pin, LCDType=LCD16x2, BL=NC, LCDTCtrl=ST7032
+
+int main() {
+// int i=0;
+ int count=0;
+ bool running=true;
+ char command;
+
+ pc.printf("LCD Test. Colums=%d, Rows=%d\n\r", lcd.columns(), lcd.rows());
+
+//while (1) {
+ for (int row=0; row<lcd.rows(); row++) {
+ int col=0;
+
+ pc.printf("MemAddr(Col=%d, Row=%d)=0x%02X\n\r", col, row, lcd.getAddress(col, row));
+// lcd.putc('-');
+ lcd.putc('0' + row);
+
+ for (col=1; col<lcd.columns()-1; col++) {
+ lcd.putc('*');
+ }
+
+ pc.printf("MemAddr(Col=%d, Row=%d)=0x%02X\n\r", col, row, lcd.getAddress(col, row));
+ lcd.putc('+');
+
+ }
+
+// wait_ms(500);
+// lcd.cls(); // Test timing
+//}
+
+
+ lcd.setCursor(TextLCD::CurOff_BlkOn);
+
+// lcd.setUDC(0, (char *) udc_AA);
+// lcd.putc(0);
+
+// lcd.setUDC(1, (char *) udc_0E);
+// lcd.putc(1);
+
+// lcd.setUDC(0, (char *) udc_0);
+// lcd.putc(0);
+// lcd.setUDC(1, (char *) udc_1);
+// lcd.putc(1);
+// lcd.setUDC(2, (char *) udc_2);
+// lcd.putc(2);
+
+ lcd.setUDC(0, (char *) udc_Bat_Hi);
+ lcd.setUDC(1, (char *) udc_Bat_Ha);
+ lcd.setUDC(2, (char *) udc_Bat_Lo);
+ lcd.setUDC(3, (char *) udc_AC);
+ lcd.setUDC(4, (char *) udc_4);
+ lcd.setUDC(5, (char *) udc_5);
+ lcd.setUDC(6, (char *) udc_6);
+ lcd.setUDC(7, (char *) udc_7);
+
+ lcd.putc(0);
+ lcd.putc(1);
+ lcd.putc(2);
+ lcd.putc(3);
+ lcd.putc(4);
+ lcd.putc(5);
+ lcd.putc(6);
+ lcd.putc(7);
+
+#if(0)
+ lcd2.setUDC(0, (char *) udc_Bat_Hi);
+ lcd2.setUDC(1, (char *) udc_Bat_Ha);
+ lcd2.setUDC(2, (char *) udc_Bat_Lo);
+ lcd2.setUDC(3, (char *) udc_AC);
+ lcd2.putc(0);
+ lcd2.putc(1);
+ lcd2.putc(2);
+ lcd2.putc(3);
+#endif
+
+#if(0)
+ while (1) {
+ lcd.locate(4, 2);
+ lcd.printf("Count=%3d", i);
+ i++;
+ if (i==100) i=0;
+
+ wait(1);
+ }
+#endif
+
+ pc.printf("Hello World!\n\r");
+ show_menu();
+
+ while(running) {
+
+ count++;
+
+ if(pc.readable()) {
+ command = pc.getc();
+ pc.printf("command= %c \n\r", command);
+
+ switch (command) {
+ case '0' :
+ pc.printf("Done\n\r");
+ running = false;
+ break;
+
+ case '1' :
+ show_menu();
+ break;
+
+ case '2' :
+ pc.printf("Goto 0,0\n\r");
+ lcd.locate(0, 0);
+// lcd2.locate(0, 0);
+ break;
+
+ case '3' :
+ pc.printf("Goto Col,Row\n\r");
+ lcd.locate( (lcd.columns() - 1), (lcd.rows() - 1));
+// lcd2.locate( (lcd.columns() - 1), (lcd.rows() - 1));
+ break;
+
+ case '4' :
+ pc.printf("cls()\n\r");
+ lcd.cls();
+// lcd2.cls();
+ break;
+
+ case '5' :
+ pc.printf("UDCs\n\r");
+ lcd.locate(2, 0);
+ lcd.putc(0);
+ lcd.putc(1);
+ lcd.putc(2);
+ lcd.putc(3);
+ lcd.putc(4);
+ lcd.putc(5);
+ lcd.putc(6);
+ lcd.putc(7);
+
+ lcd.locate(4, lcd.rows()-1);
+ lcd.putc(0);
+ lcd.putc(1);
+ lcd.putc(2);
+ lcd.putc(3);
+
+
+// lcd2.locate(4, lcd.rows()-1);
+// lcd2.putc(0);
+// lcd2.putc(1);
+// lcd2.putc(2);
+// lcd2.putc(3);
+
+ break;
+ case '6' :
+ pc.printf("Fill\n\r");
+ lcd.locate(0, 0);
+ for (int row=0; row<lcd.rows(); row++) {
+ int col=0;
+
+// pc.printf("MemAddr(Col=%d, Row=%d)=0x%02X\n\r", col, row, lcd.getAddress(col, row));
+ // lcd.putc('-');
+ lcd.putc('0' + row);
+
+ for (col=1; col<lcd.columns()-1; col++) {
+ lcd.putc('*');
+ }
+
+// pc.printf("MemAddr(Col=%d, Row=%d)=0x%02X\n\r", col, row, lcd.getAddress(col, row));
+ lcd.putc('+');
+ }
+
+ break;
+
+ case '7' :
+ pc.printf("Cursor 0n\n\r");
+ lcd.setCursor(TextLCD::CurOff_BlkOn);
+// lcd2.setCursor(TextLCD::CurOff_BlkOn);
+ break;
+
+ case '8' :
+ pc.printf("Cursor 0ff\n\r");
+ lcd.setCursor(TextLCD::CurOff_BlkOff);
+// lcd2.setCursor(TextLCD::CurOff_BlkOff);
+ break;
+
+ case '9' :
+ pc.printf("Text\n\r");
+ lcd.printf("Hello mbed\n");
+// lcd2.printf("Hello mbed\n");
+
+ break;
+
+ case 'A' :
+ pc.printf("Display On\n\r");
+ lcd.setMode(TextLCD::DispOn);
+// lcd2.setMode(TextLCD::DispOn);
+ break;
+
+ case 'B' :
+ pc.printf("Display Off\n\r");
+ lcd.setMode(TextLCD::DispOff);
+// lcd2.setMode(TextLCD::DispOff);
+ break;
+
+ case 'C' :
+ pc.printf("Backlight On\n\r");
+ lcd.setBacklight(TextLCD::LightOn);
+// lcd2.setBacklight(TextLCD::LightOn);
+ break;
+
+ case 'D' :
+ pc.printf("Backlight Off\n\r");
+ lcd.setBacklight(TextLCD::LightOff);
+// lcd2.setBacklight(TextLCD::LightOff);
+ break;
+
+
+// case 'E' :
+// pc.printf("Test nibble\n\r");
+// for (int i=0; i<16; i++) {
+// lcd._writeNibble(i);
+// wait(1);
+// }
+// break;
+
+
+
+ default :
+ lcd.putc(command);
+// lcd2.putc(command);
+ break;
+
+ } //switch
+ }//if
+ }//while
+
+ pc.printf("Bye World!\n\r");
+}
\ No newline at end of file
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Repository details
| Type: | Program |
|---|---|
| Mbed OS support: | Mbed 2 deprecated |
| Created: | 29 Mar 2015 |
| Imports: | 3982 |
| Forks: | 10 |
| Commits: | 5 |
| Dependents: | 1 |
| Dependencies: | 2 |
| Followers: | 26 |
The code in this repository is Apache licensed.
HD44780 and compatible Text LCD controllers (4bit, I2C or SPI I/F)