81 lines
1.9 KiB
C++
81 lines
1.9 KiB
C++
#ifndef _LCD_H_
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#define _LCD_H_
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#include <LiquidCrystal_I2C.h>
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#define BUFSIZE 64
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class LCDWrapper : public LiquidCrystal_I2C{
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private:
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uint8_t rows, cols;
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char* buffer = NULL;
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public:
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LCDWrapper(uint8_t addr, uint8_t cols, uint8_t rows, uint8_t charsize=LCD_5x8DOTS) : LiquidCrystal_I2C(addr,cols,rows,charsize) {
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this->cols = cols;
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this->rows = rows;
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}
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void begin(){
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LiquidCrystal_I2C::begin();
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LiquidCrystal_I2C::backlight();
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}
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void printfn(const uint8_t line, const char *fmt, ...){
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buffer = (char*) malloc( BUFSIZE * sizeof(char*));
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buffer[0] = 0;
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va_list ap;
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va_start(ap, fmt);
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int size = vsnprintf(buffer, BUFSIZE, fmt, ap);
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va_end(ap);
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if( size < 0 || size >= BUFSIZE ){ free(buffer); return; }
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LiquidCrystal_I2C::setCursor(0, line);
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LiquidCrystal_I2C::print(buffer);
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free(buffer);
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}
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void printfn_overflow(const uint8_t line, const char *fmt, ...){
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buffer = (char*) malloc( BUFSIZE * sizeof(char*));
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buffer[0] = 0;
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va_list ap;
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va_start(ap, fmt);
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int size = vsnprintf(buffer, BUFSIZE, fmt, ap);
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va_end(ap);
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buffer[BUFSIZE-1] = 0;
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if( size < 0 || size >= BUFSIZE ){ free(buffer); return; }
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LiquidCrystal_I2C::setCursor(0,line);
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LiquidCrystal_I2C::print(buffer);
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if( size <= cols ){ free(buffer); return; }
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for( uint8_t offset = 1 ; offset <= size-cols ; offset++ ){
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delay(200);
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LiquidCrystal_I2C::setCursor(0,line);
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LiquidCrystal_I2C::print(buffer+offset);
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}
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free(buffer);
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}
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protected:
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void printf(const char *fmt, ...) {
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buffer = (char*) malloc( BUFSIZE * sizeof(char*));
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buffer[0] = 0;
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va_list ap;
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va_start(ap, fmt);
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int size = vsnprintf(buffer, BUFSIZE, fmt, ap);
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va_end(ap);
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if( size < 0 || size >= BUFSIZE ){ free(buffer); return; }
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LiquidCrystal_I2C::print(buffer);
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free(buffer);
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}
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};
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#endif |