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HD44780_LCD.c
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HD44780_LCD.c
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#include "HD44780_LCD.h"
static uint32_t dataPins[8];
static uint8_t displayControlParameters;
static char formatBuffer[HD44780_LCD_COL_COUNT + 1];
static const uint8_t loadBarStartElement[8] = {0b10000, 0b11000, 0b11100, 0b11110, 0b11110, 0b11100, 0b11000, 0b10000};
static const uint8_t loadBarProgressElement[8] = {0b11111, 0b11111, 0b11111, 0b11111, 0b11111, 0b11111, 0b11111, 0b11111};
static const uint8_t loadBarEndElement[8] = {0b00001, 0b00011, 0b00111, 0b01111, 0b01111, 0b00111, 0b00011, 0b00001};
uint8_t barRowLocation = 0;
uint8_t barColLocation = 0;
uint8_t barTotalLength = 0;
uint8_t barProgress = 0;
#ifdef HD44780_USE_8_BIT_MODE
void initLCDinEightBitMode() {
dwtDelayInit();
delay_ms(20); // LCD Power ON delay always >15ms
dataPins[0] = LCD_D0;
dataPins[1] = LCD_D1;
dataPins[2] = LCD_D2;
dataPins[3] = LCD_D3;
dataPins[4] = LCD_D4;
dataPins[5] = LCD_D5;
dataPins[6] = LCD_D6;
dataPins[7] = LCD_D7;
commandLCD(LCD_TWO_LINES_5X8_MATRIX_8BIT_MODE);
}
void pulseEnable() {
LL_GPIO_SetOutputPin(LCD_COMMAND_PORT, LCD_EN);
delay_us(1);
LL_GPIO_ResetOutputPin(LCD_COMMAND_PORT, LCD_EN);
delay_ms(2);
}
void writeToPort(uint8_t port, uint8_t value) {
if (value) {
LL_GPIO_SetOutputPin(LCD_DATA_PORT, port);
} else {
LL_GPIO_ResetOutputPin(LCD_DATA_PORT, port);
}
}
void writeEightBits(uint8_t value) {
for (uint8_t i = 0; i < 8; i++) {
writeToPort(dataPins[i], (value >> i) & 0x01);
}
}
void commandLCD(uint8_t command) {
writeEightBits(command);
LL_GPIO_ResetOutputPin(LCD_COMMAND_PORT, LCD_RS); // RS=0 command reg.
pulseEnable();
}
void printLCDChar(unsigned char charData) {
writeEightBits(charData);
LL_GPIO_SetOutputPin(LCD_COMMAND_PORT, LCD_RS); // RS=1 data reg.
pulseEnable();
}
#endif //USE_8_BIT_MODE
//-----------------------------------------------------------------------------
#ifdef HD44780_USE_4_BIT_MODE
void initLCDinFourBitMode() {
dwtDelayInit();
delay_ms(20); // LCD Power ON delay always >15ms
dataPins[0] = LCD_D4;
dataPins[1] = LCD_D5;
dataPins[2] = LCD_D6;
dataPins[3] = LCD_D7;
commandLCD(0x33);
commandLCD(0x32); // Send for 4 bit initialization of LCD
commandLCD(LCD_TWO_LINES_5X8_MATRIX_4BIT_MODE);
}
void writeToPort(uint8_t port, uint8_t value) {
if (value) {
LL_GPIO_SetOutputPin(LCD_PORT, port);
} else {
LL_GPIO_ResetOutputPin(LCD_PORT, port);
}
}
void writeFourBits(uint8_t nibble) {
for (uint8_t i = 0; i < 4; i++) {
writeToPort(dataPins[i], (nibble >> i) & 0x01);
}
}
void pulseEnableUpper() {
LL_GPIO_SetOutputPin(LCD_PORT, LCD_EN); // Enable pulse
delay_ms(1);
LL_GPIO_ResetOutputPin(LCD_PORT, LCD_EN);
delay_us(200);
}
void pulseEnableLower() {
LL_GPIO_SetOutputPin(LCD_PORT, LCD_EN); // Enable pulse
delay_us(1);
LL_GPIO_ResetOutputPin(LCD_PORT, LCD_EN);
delay_ms(2);
}
void commandLCD(uint8_t command) {
writeFourBits(command >> 4); // sending upper nibble
LL_GPIO_ResetOutputPin(LCD_PORT, LCD_RS); // RS=0, command reg.
pulseEnableUpper();
writeFourBits(command); // sending lower nibble
pulseEnableLower();
}
void printLCDChar(unsigned char charData) {
writeFourBits(charData >> 4); // sending upper nibble
LL_GPIO_SetOutputPin(LCD_PORT, LCD_RS); // RS=1, data reg.
pulseEnableUpper();
writeFourBits(charData);
pulseEnableLower();
}
#endif //USE_4_BIT_MODE
void initLCD() {
#ifdef HD44780_USE_8_BIT_MODE // Configure lcd for 8 bit mode
initLCDinEightBitMode();
#elif defined(HD44780_USE_4_BIT_MODE) // Configure lcd for 4 bit mode
initLCDinFourBitMode();
#endif
commandLCD(LCD_DISPLAY_ON_CURSOR_OFF);
commandLCD(LCD_SHIFT_CURSOR_RIGHT); // Auto Increment cursor from left to right
clearLCD();
}
void clearLCD() {
commandLCD(LCD_CLEAR_DISPLAY);
delay_ms(2); // Clear display command delay > 1.63 ms
returnHomeLCD();
}
void turnOnLCD() {
displayControlParameters |= LCD_DISPLAYON;
commandLCD(LCD_DISPLAYCONTROL | displayControlParameters);
}
void turnOffLCD() {
displayControlParameters &= ~LCD_DISPLAYON;
commandLCD(LCD_DISPLAYCONTROL | displayControlParameters);
}
void returnHomeLCD() {
commandLCD(LCD_MOVE_CURSOR_AT_FIRST_LINE_BEGINNING);
}
void enableBlinkingCursorLCD() {
displayControlParameters |= LCD_DISPLAY_ON_CURSOR_BLINKING;
commandLCD(LCD_DISPLAYCONTROL | displayControlParameters);
}
void disableBlinkingCursorLCD() {
commandLCD(LCD_DISPLAY_ON_CURSOR_OFF);
}
void enableCursorLCD() {
displayControlParameters |= LCD_CURSORON;
commandLCD(LCD_DISPLAYCONTROL | displayControlParameters);
}
void disableCursorLCD() {
displayControlParameters &= ~LCD_CURSORON;
commandLCD(LCD_DISPLAYCONTROL | displayControlParameters);
}
void moveCursorLeftLCD() {
commandLCD(LCD_SHIFT_POSITION_LEFT);
}
void moveCursorRightLCD() {
commandLCD(LCD_SHIFT_POSITION_LEFT);
}
void moveCursorAtSecondLineBeginningLCD() {
commandLCD(LCD_MOVE_CURSOR_AT_SECOND_LINE_BEGINNING);
}
void moveDisplayLeftLCD() {
commandLCD(LCD_SHIFT_DISPLAY_LEFT);
}
void moveDisplayRightLCD() {
commandLCD(LCD_SHIFT_DISPLAY_RIGHT);
}
void setCursorIncrementFromLeftToRightLCD() {
displayControlParameters |= LCD_ENTRYLEFT;
commandLCD(LCD_ENTRYMODESET | displayControlParameters);
}
void setCursorIncrementFromRightToLeftLCD() {
displayControlParameters &= ~LCD_ENTRYLEFT;
commandLCD(LCD_ENTRYMODESET | displayControlParameters);
}
void enableAutoScrollLCD() {
displayControlParameters |= LCD_ENTRYSHIFTINCREMENT;
commandLCD(LCD_ENTRYMODESET | displayControlParameters);
}
void disableAutoScrollLCD() {
displayControlParameters &= ~LCD_ENTRYSHIFTINCREMENT;
commandLCD(LCD_ENTRYMODESET | displayControlParameters);
}
void goToXYLCD(uint8_t row, uint8_t pos) {
static const uint8_t rowOffsets[] = {0x00, 0x40, 0x14, 0x54};
if (row < HD44780_LCD_ROW_COUNT && pos < HD44780_LCD_COL_COUNT) {
commandLCD(LCD_SETDDRAMADDR | (pos + rowOffsets[row]));
}
}
void printLCD(char *string) {
for (uint8_t i = 0; string[i] != 0; i++) {
printLCDChar(string[i]);
}
}
void printAtPositionLCD(uint8_t row, uint8_t pos, char *str) { // Send string to LCD with xy position
goToXYLCD(row, pos);
printLCD(str);
}
void printfAtPositionLCD(uint8_t row, uint8_t pos, char *format, ...) {
va_list args;
va_start(args, format);
vsnprintf(formatBuffer, HD44780_LCD_COL_COUNT + 1, format, args);
va_end(args);
goToXYLCD(row, pos);
printLCD(formatBuffer);
}
void cleanPrintAtPositionLCD(uint8_t row, uint8_t col, const char *string) {
char buffer[HD44780_LCD_COL_COUNT] = {[0 ... HD44780_LCD_COL_COUNT - 1] = ' '};
buffer[HD44780_LCD_COL_COUNT - 1] = '\0';
for (uint8_t i = col, j = 0; i < HD44780_LCD_COL_COUNT && string[j] != '\0'; i++, j++) {
buffer[i] = string[j];
}
goToXYLCD(row, 0);
printLCD(buffer);
}
void cleanPrintfAtPositionLCD(uint8_t row, uint8_t col, char *format, ...) {
va_list args;
va_start(args, format);
vsnprintf(formatBuffer, HD44780_LCD_COL_COUNT + 1, format, args);
va_end(args);
cleanPrintAtPositionLCD(row, col, formatBuffer);
}
void createCustomCharLCD(uint8_t location, const uint8_t *charmap) { // location from 0 to 7
if (location < 8) {
commandLCD(LCD_SETCGRAMADDR + (location * 8));// Command 0x40 and onwards forces the device to point CGRAM address
for (uint8_t i = 0; i < 8; i++) {
printLCDChar(charmap[i]);
}
returnHomeLCD();
}
}
void printCustomCharLCD(uint8_t location) { // location from 0 to 7
if (location < 8) {
printLCDChar(location);
}
}
void printfLCD(char *format, ...) {
va_list args;
va_start(args, format);
vsnprintf(formatBuffer, HD44780_LCD_COL_COUNT + 1, format, args);
va_end(args);
printLCD(formatBuffer);
}
void cleanPrintLCD(const char *string) {
char buffer[HD44780_LCD_COL_COUNT] = {[0 ... HD44780_LCD_COL_COUNT - 1] = ' '};
buffer[HD44780_LCD_COL_COUNT - 1] = '\0';
for (uint8_t i = 0; i < HD44780_LCD_COL_COUNT && string[i] != '\0'; i++) {
buffer[i] = string[i];
}
printLCD(buffer);
}
void cleanPrintfLCD(char *format, ...) {
va_list args;
va_start(args, format);
vsnprintf(formatBuffer, HD44780_LCD_COL_COUNT + 1, format, args);
va_end(args);
cleanPrintLCD(formatBuffer);
}
void initProgressBar(uint8_t len, uint8_t row, uint8_t col) {
bool isBarLengthValid = (len <= HD44780_LCD_COL_COUNT - 1) && ((len - 2) >= 0);
bool isRowValid = row < HD44780_LCD_ROW_COUNT;
if (isBarLengthValid && isRowValid) {
createCustomCharLCD(0, loadBarStartElement);
createCustomCharLCD(1, loadBarProgressElement);
createCustomCharLCD(2, loadBarEndElement);
barRowLocation = row;
barColLocation = col + 1;
barTotalLength = len - 1;
goToXYLCD(row, col);
printCustomCharLCD(0);
goToXYLCD(row, (col + len));
printCustomCharLCD(2);
}
}
void incrementProgressBar() {
if (barTotalLength > 0 && barProgress < barTotalLength) {
goToXYLCD(barRowLocation, barColLocation++);
printCustomCharLCD(1);
barProgress++;
}
}
void decrementProgressBar() {
if (barTotalLength > 0 && barProgress > 0) {
goToXYLCD(barRowLocation, barProgress--);
printLCD(" ");
barColLocation--;
}
}