aiie/teensy/teensy-printer.cpp

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#include <Arduino.h>
#include "teensy-printer.h"
#define WIDTH (384) // width of printer, in dots
#define NATIVEWIDTH 960 //
#define RXPIN 57
#define TXPIN 56
TeensyPrinter::TeensyPrinter()
{
#if 0
// debugging
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ser = new SoftwareSerial(RXPIN, TXPIN, false);
ser->begin(19200);
char buf[6] = { 27, '@', // init command '@'
27, '3', 8, // ESC-3 is "set line spacing"; default 30
0 // terminator
};
ser->print(buf);
#endif
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}
TeensyPrinter::~TeensyPrinter()
{
delete ser;
}
void TeensyPrinter::update()
{
}
void TeensyPrinter::addLine(uint8_t *rowOfBits)
{
if (!ser)
return;
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static uint8_t linebuf[WIDTH/8]; // output data for one line of pixels
// The rowOfBits is a set of *rows* of bits. The printer needs *columns*.
// Convert and send as necessary.
// Send bitmap command, followed by bitmap data, followed by linefeed?
// ser->write(27); // set line spacing
// ser->write('3');
// ser->write((uint8_t)30);
#define DC2 18
// FIXME: is this 0-6, or 1-7? One of them is empty..
// FIXME: also read this off of the print head size/line feed size?
for (int yoff=1; yoff<8; yoff++) {
memset(linebuf, 0, sizeof(linebuf)); // start clear...
for (int i=0; i<(NATIVEWIDTH/8); i++) {
uint8_t bv = rowOfBits[yoff*120+i];
// Process the 8 bits in this byte
for (int xoff=0; xoff<8; xoff++) {
// scale X from "actual FX80" coordinates to "real printer" coordinates
uint16_t actualX = (uint16_t)(((float)(i*8+xoff) * (float)WIDTH) / (float)NATIVEWIDTH);
if (bv & (1 << (7-xoff))) { // if it's on in the original
// then turn it on in our copy
uint8_t bitNum = actualX & 0x07;
linebuf[actualX>>3] |= (1<<(7-bitNum));
}
}
}
// Send this line to the printer
ser->write(DC2); // send this line as a bitmap
ser->write('*');
ser->write(1); // FIXME: height
ser->write(48); // FIXME: width, in bytes
for (int i=0; i<WIDTH/8; i++) {
ser->write(linebuf[i]);
}
}
// ser->write(10); // linefeed @ the end
}
void TeensyPrinter::moveDownPixels(uint8_t p)
{
}