Initial Release

pio/addition/addition.c

@@ -0,0 +1,35 @@
+/**
+ * Copyright (c) 2020 Raspberry Pi (Trading) Ltd.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+
+#include "pico/stdlib.h"
+#include "hardware/pio.h"
+#include "addition.pio.h"
+
+// Pop quiz: how many additions does the processor do when calling this function
+uint32_t do_addition(PIO pio, uint sm, uint32_t a, uint32_t b) {
+    pio_sm_put_blocking(pio, sm, a);
+    pio_sm_put_blocking(pio, sm, b);
+    return pio_sm_get_blocking(pio, sm);
+}
+
+int main() {
+    stdio_init_all();
+
+    PIO pio = pio0;
+    uint sm = 0;
+    uint offset = pio_add_program(pio, &addition_program);
+    addition_program_init(pio, sm, offset);
+
+    printf("Doing some random additions:\n");
+    for (int i = 0; i < 10; ++i) {
+        uint a = rand() % 100;
+        uint b = rand() % 100;
+        printf("%u + %u = %u\n", a, b, do_addition(pio, sm, a, b));
+    }
+}