kopia lustrzana https://github.com/Wren6991/PicoDVI
54 wiersze
1.4 KiB
Plaintext
54 wiersze
1.4 KiB
Plaintext
.program dvi_serialiser
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.side_set 2
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.origin 0
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; Single-ended -> differential serial
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out pc, 1 side 0b10
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out pc, 1 side 0b01
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.program dvi_serialiser_debug
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.side_set 1 opt
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; The debug variant behaves as a UART with 1 start bit, 10 data bits, 1 stop
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; bit, and 5/6ths the data throughput of the TMDS version.
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pull ifempty side 1 ; Extend stop bit with FIFO stall
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nop side 0
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out pins, 1 ; Unrolled because we require 1 bit / clk
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out pins, 1
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out pins, 1
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out pins, 1
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out pins, 1
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out pins, 1
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out pins, 1
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out pins, 1
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out pins, 1
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out pins, 1
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% c-sdk {
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#include "dvi_config_defs.h"
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static inline void dvi_serialiser_program_init(PIO pio, uint sm, uint offset, uint data_pins, bool debug) {
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pio_sm_set_pins_with_mask(pio, sm, 2u << data_pins, 3u << data_pins);
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pio_sm_set_pindirs_with_mask(pio, sm, ~0u, 3u << data_pins);
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pio_gpio_init(pio, data_pins);
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pio_gpio_init(pio, data_pins + 1);
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pio_sm_config c;
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if (debug) {
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c = dvi_serialiser_debug_program_get_default_config(offset);
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}
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else {
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c = dvi_serialiser_program_get_default_config(offset);
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}
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sm_config_set_sideset_pins(&c, data_pins);
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if (debug)
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sm_config_set_out_pins(&c, data_pins, 1);
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sm_config_set_out_shift(&c, true, !debug, 10 * DVI_SYMBOLS_PER_WORD);
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sm_config_set_fifo_join(&c, PIO_FIFO_JOIN_TX);
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pio_sm_init(pio, sm, offset, &c);
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pio_sm_set_enabled(pio, sm, false);
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}
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%}
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