Initial Release

pio/pio_blink/blink.c

@@ -0,0 +1,34 @@
+/**
+ * Copyright (c) 2020 Raspberry Pi (Trading) Ltd.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <stdio.h>
+
+#include "pico/stdlib.h"
+#include "hardware/pio.h"
+#include "blink.pio.h"
+
+void blink_pin_forever(PIO pio, uint sm, uint offset, uint pin, uint freq);
+
+int main() {
+    setup_default_uart();
+
+    // todo get free sm
+    PIO pio = pio0;
+    uint offset = pio_add_program(pio, &blink_program);
+    printf("Loaded program at %d\n", offset);
+
+    blink_pin_forever(pio, 0, offset, 0, 3);
+    blink_pin_forever(pio, 1, offset, 6, 4);
+    blink_pin_forever(pio, 2, offset, 11, 1);
+}
+
+void blink_pin_forever(PIO pio, uint sm, uint offset, uint pin, uint freq) {
+    blink_program_init(pio, sm, offset, pin);
+    pio_sm_set_enabled(pio, sm, true);
+
+    printf("Blinking pin %d at freq %d\n", pin, freq);
+    pio->txf[sm] = 24000000 / freq;
+}