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fix dual_display 8bpp #41

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fix dual_display 8bpp #41

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8 changes: 5 additions & 3 deletions software/apps/dual_display/main.c
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Original file line number Diff line number Diff line change
Expand Up @@ -31,17 +31,19 @@ void display_scrolling_testcard(struct dvi_inst *inst, const uint8_t *img) {
const uint blue_msb = 1;
const uint blue_lsb = 0;
uint pixwidth = inst->timing->h_active_pixels;
uint words_per_channel = pixwidth / DVI_SYMBOLS_PER_WORD;
uint frame_ctr = 0;
while (true) {
// Legacy. Better use dvi_scanbuf_main_8bpp().
for (uint y = 0; y < FRAME_HEIGHT; ++y) {
uint y_scroll = (y + frame_ctr) % FRAME_HEIGHT;
const uint8_t *colourbuf = &((const uint8_t*)img)[y_scroll * FRAME_WIDTH];
uint32_t *tmdsbuf;
queue_remove_blocking_u32(&inst->q_tmds_free, &tmdsbuf);
// NB the scanline buffers are half-resolution!
tmds_encode_data_channel_8bpp((const uint32_t*)colourbuf, tmdsbuf, pixwidth / 2, blue_msb, blue_lsb);
tmds_encode_data_channel_8bpp((const uint32_t*)colourbuf, tmdsbuf + pixwidth, pixwidth / 2, green_msb, green_lsb);
tmds_encode_data_channel_8bpp((const uint32_t*)colourbuf, tmdsbuf + 2 * pixwidth, pixwidth / 2, red_msb, red_lsb);
tmds_encode_data_channel_8bpp((const uint32_t*)colourbuf, tmdsbuf + 0 * words_per_channel, pixwidth / 2, blue_msb, blue_lsb);
tmds_encode_data_channel_8bpp((const uint32_t*)colourbuf, tmdsbuf + 1 * words_per_channel, pixwidth / 2, green_msb, green_lsb);
tmds_encode_data_channel_8bpp((const uint32_t*)colourbuf, tmdsbuf + 2 * words_per_channel, pixwidth / 2, red_msb, red_lsb);
queue_add_blocking_u32(&inst->q_tmds_valid, &tmdsbuf);
}
++frame_ctr;
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