.program dvi_serialiser
.side_set 2
.origin 0

; Single-ended -> differential serial

	out pc, 1    side 0b10
	out pc, 1    side 0b01

.program dvi_serialiser_debug
.side_set 1 opt

; The debug variant behaves as a UART with 1 start bit, 10 data bits, 1 stop
; bit, and 5/6ths the data throughput of the TMDS version.

	pull ifempty  side 1 ; Extend stop bit with FIFO stall
	nop           side 0
	out pins, 1          ; Unrolled because we require 1 bit / clk
	out pins, 1
	out pins, 1
	out pins, 1
	out pins, 1
	out pins, 1
	out pins, 1
	out pins, 1
	out pins, 1
	out pins, 1
	
% c-sdk {
#include "dvi_config_defs.h"

static inline void dvi_serialiser_program_init(PIO pio, uint sm, uint offset, uint data_pins, bool debug) {
    pio_sm_set_pins_with_mask(pio, sm, 2u << data_pins, 3u << data_pins);
    pio_sm_set_pindirs_with_mask(pio, sm, ~0u, 3u << data_pins);
    pio_gpio_init(pio, data_pins);
    pio_gpio_init(pio, data_pins + 1);

    pio_sm_config c;
    if (debug) {
        c = dvi_serialiser_debug_program_get_default_config(offset);
    }
    else {
        c = dvi_serialiser_program_get_default_config(offset);
    }
    sm_config_set_sideset_pins(&c, data_pins);
    if (debug)
	    sm_config_set_out_pins(&c, data_pins, 1);
    sm_config_set_out_shift(&c, true, !debug, 10 * DVI_SYMBOLS_PER_WORD);
    sm_config_set_fifo_join(&c, PIO_FIFO_JOIN_TX);
    pio_sm_init(pio, sm, offset, &c);
    pio_sm_set_enabled(pio, sm, false);
}
%}