64 lines
1.9 KiB
C
64 lines
1.9 KiB
C
// -------------------------------------------------- //
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// This file is autogenerated by pioasm; do not edit! //
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// -------------------------------------------------- //
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// Unless you know what you are doing...
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// Lines 47 and 52 have been edited to set transmit bit count
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#if !PICO_NO_HARDWARE
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#include "hardware/pio.h"
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#endif
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// ------ //
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// ws2812 //
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// ------ //
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#define ws2812_wrap_target 0
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#define ws2812_wrap 3
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#define ws2812_T1 2
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#define ws2812_T2 5
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#define ws2812_T3 3
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static const uint16_t ws2812_program_instructions[] = {
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// .wrap_target
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0x6221, // 0: out x, 1 side 0 [2]
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0x1123, // 1: jmp !x, 3 side 1 [1]
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0x1400, // 2: jmp 0 side 1 [4]
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0xa442, // 3: nop side 0 [4]
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// .wrap
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};
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#if !PICO_NO_HARDWARE
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static const struct pio_program ws2812_program = {
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.instructions = ws2812_program_instructions,
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.length = 4,
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.origin = -1,
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};
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static inline pio_sm_config ws2812_program_get_default_config(uint offset) {
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pio_sm_config c = pio_get_default_sm_config();
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sm_config_set_wrap(&c, offset + ws2812_wrap_target, offset + ws2812_wrap);
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sm_config_set_sideset(&c, 1, false, false);
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return c;
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}
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#include "hardware/clocks.h"
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static inline void ws2812_program_init(PIO pio, uint sm, uint offset, uint pin,
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float freq, uint bits) {
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pio_gpio_init(pio, pin);
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pio_sm_set_consecutive_pindirs(pio, sm, pin, 1, true);
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pio_sm_config c = ws2812_program_get_default_config(offset);
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sm_config_set_sideset_pins(&c, pin);
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sm_config_set_out_shift(&c, false, true,
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bits); // <----<<< Length changed to "bits"
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sm_config_set_fifo_join(&c, PIO_FIFO_JOIN_TX);
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int cycles_per_bit = ws2812_T1 + ws2812_T2 + ws2812_T3;
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float div = clock_get_hz(clk_sys) / (freq * cycles_per_bit);
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sm_config_set_clkdiv(&c, div);
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pio_sm_init(pio, sm, offset, &c);
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pio_sm_set_enabled(pio, sm, true);
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}
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#endif
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