Move the sdk project to a subdir.

Signed-off-by: jmug <u.g.a.mariano@gmail.com>

with_sdk/rp2350/blink/CMakeLists.txt

@@ -0,0 +1,23 @@
+cmake_minimum_required(VERSION 3.13...3.27)
+
+# initialize pico-sdk from submodule
+# note: this must happen before project()
+include(../../../pico-sdk/pico_sdk_init.cmake)
+
+project(my_project)
+
+# initialize the Raspberry Pi Pico SDK
+set(PICO_BOARD, "pico")
+pico_sdk_init()
+
+# rest of your project
+add_executable(hello_world
+    hello_world.c
+    led.s
+)
+
+# Add pico_stdlib library which aggregates commonly used features
+target_link_libraries(hello_world pico_stdlib)
+
+# create map/bin/hex/uf2 file in addition to ELF.
+pico_add_extra_outputs(hello_world)

with_sdk/rp2350/blink/hello_world.c

@@ -0,0 +1,56 @@
+/**
+ * Copyright (c) 2020 Raspberry Pi (Trading) Ltd.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include "pico/stdlib.h"
+
+// Pico W devices use a GPIO on the WIFI chip for the LED,
+// so when building for Pico W, CYW43_WL_GPIO_LED_PIN will be defined
+#ifdef CYW43_WL_GPIO_LED_PIN
+#include "pico/cyw43_arch.h"
+#endif
+
+#ifndef LED_DELAY_MS
+#define LED_DELAY_MS 250
+#endif
+
+// Perform initialisation
+int pico_led_init(void) {
+#if defined(PICO_DEFAULT_LED_PIN)
+    // A device like Pico that uses a GPIO for the LED will define PICO_DEFAULT_LED_PIN
+    // so we can use normal GPIO functionality to turn the led on and off
+    gpio_init(PICO_DEFAULT_LED_PIN);
+    gpio_set_dir(PICO_DEFAULT_LED_PIN, GPIO_OUT);
+    return PICO_OK;
+#elif defined(CYW43_WL_GPIO_LED_PIN)
+    // For Pico W devices we need to initialise the driver etc
+    return cyw43_arch_init();
+#endif
+}
+
+// Turn the led on or off
+void pico_set_led(bool led_on) {
+#if defined(PICO_DEFAULT_LED_PIN)
+    // Just set the GPIO on or off
+    gpio_put(PICO_DEFAULT_LED_PIN, led_on);
+#elif defined(CYW43_WL_GPIO_LED_PIN)
+    // Ask the wifi "driver" to set the GPIO on or off
+    cyw43_arch_gpio_put(CYW43_WL_GPIO_LED_PIN, led_on);
+#endif
+}
+
+void blink();
+
+int main() {
+    int rc = pico_led_init();
+    hard_assert(rc == PICO_OK);
+    blink();
+    /* while (true) { */
+    /*     pico_set_led(true); */
+    /*     sleep_ms(LED_DELAY_MS); */
+    /*     pico_set_led(false); */
+    /*     sleep_ms(LED_DELAY_MS); */
+    /* } */
+}

with_sdk/rp2350/blink/led.s

@@ -0,0 +1,25 @@
+.section .text
+.equ sio_base, 		0xd0000000
+.equ big_num,		0x00f00000	// For the delay.
+
+.thumb_func
+.global blink
+blink:
+	ldr r0, =sio_base
+	mov r1, #1
+	lsl r1, r1, #25
+led_loop:
+	str r1, [r0, #0x18] // GPIO_OUT_SET
+	ldr r3, =big_num
+	bl delay
+
+	str r1, [r0, #0x20] // GPIO_OUT_CLR
+	ldr r3, =big_num
+	bl delay
+
+	b led_loop
+
+delay:
+	sub r3, #1
+	bne delay
+	bx lr