36 lines
901 B
C
36 lines
901 B
C
/**
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* Copyright (c) 2020 Raspberry Pi (Trading) Ltd.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <stdio.h>
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#include "pico/stdlib.h"
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#include "hardware/pio.h"
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#include "hardware/clocks.h"
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#include "blink.pio.h"
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void blink_pin_forever(PIO pio, uint sm, uint offset, uint pin, uint freq);
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int main() {
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setup_default_uart();
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// todo get free sm
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PIO pio = pio0;
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uint offset = pio_add_program(pio, &blink_program);
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printf("Loaded program at %d\n", offset);
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blink_pin_forever(pio, 0, offset, 0, 3);
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blink_pin_forever(pio, 1, offset, 6, 4);
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blink_pin_forever(pio, 2, offset, 11, 1);
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}
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void blink_pin_forever(PIO pio, uint sm, uint offset, uint pin, uint freq) {
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blink_program_init(pio, sm, offset, pin);
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pio_sm_set_enabled(pio, sm, true);
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printf("Blinking pin %d at %d Hz\n", pin, freq);
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pio->txf[sm] = clock_get_hz(clk_sys) / 2 * freq;
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}
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