void push_foo(void) {
int i, j;
// Ungerade Zeilen schieben
for (j = 0; j < 32; j++) {
for (i = 0; i < 38; i++) {
send_pixel((char*)transfer_pixmap[(j*38)+i]);
ftd = !ftd;
}
if (j == 31) {
send_pixel_block_spacer(true, false);
} else {
send_pixel_block_spacer(false, false);
}
}
// Gerade Zeilen schieben
for (j = 0; j < 32; j++) {
for (i = 0; i < 38; i++) {
send_pixel((char*)transfer_pixmap[(j*38)+i+1216]);
}
if (j == 31) {
send_pixel_block_spacer(true, true);
} else {
send_pixel_block_spacer(false, true);
}
}
}
/**
* Sends the spacer between the pixel blocks.
*
* @param endFullBlock true if it's the last block prior bank switching, false otherwise
* @param odd true If odd rows needs to be filled, false otherwise.
*/
void send_pixel_block_spacer (bool endFullBlock, bool odd) {
send_pixel(false);
send_pixel(false);
if (odd) {
send_pixel(true);
} else {
send_pixel(false);
}
send_pixel(false);
send_pixel(false);
send_pixel(true);
send_pixel(false);
send_pixel(false);
send_pixel(false);
send_pixel(false);
if (endFullBlock) {
PORTC |= (1 << LINE6);
_delay_us(2);
PORTC &= ~(1 << LINE6);
_delay_us(2);
}
}
static u08 load_data(FIL *fh,u16 xp, u16 yp)
{
u08 result = CMD_OK;
u16 x = 0;
u16 y = 0;
while(y < height) {
// fetch partial pixel at the end of the buffer
if(buf_avail < 3) {
while(buf_avail > 0) {
partial_rgb[partial_num] = buf[buf_pos];
partial_num ++;
buf_pos++;
buf_avail--;
}
}
// read a new buffer if the current one is empty
// -> read from SD card
if(buf_avail == 0) {
result = fill_buffer(fh);
if(result != CMD_OK) {
return result;
}
}
// do we have to fill the partial pixel with the fresh buffer?
if(partial_num > 0) {
// this only happens after an empty buffer
while(partial_num < 3) {
if(buf_avail == 0) {
return PIC_READ_ERROR;
}
partial_rgb[partial_num] = buf[buf_pos];
partial_num++;
buf_pos++;
buf_avail--;
}
}
// calculate the number of pixels in the buffer
// and the number of pixels fitting in the current line
// -> use min of both
u16 got_pixels = buf_avail / 3;
if(partial_num > 0) {
got_pixels ++;
}
u16 line_pixels = width - x;
u16 draw_pixels;
if(got_pixels < line_pixels) {
draw_pixels = got_pixels;
} else {
draw_pixels = line_pixels;
}
// determine the display area (=line) for these pixels
u16 x_end = x + draw_pixels - 1;
display_set_area(xp + x, yp + y, xp + x_end, yp+y);
display_draw_start();
// send partial pixel first
if(partial_num>0) {
send_pixel(partial_rgb);
draw_pixels--;
partial_num = 0;
}
// now send buffer pixels
for(u16 i=0;i<draw_pixels;i++) {
const u08 *rgb = buf + buf_pos;
send_pixel(rgb);
buf_pos += 3;
buf_avail -= 3;
}
display_draw_stop();
// update draw location
x = x_end + 1;
if(x == width) {
x = 0;
y++;
}
}
return CMD_OK;
}
