Wakeup: Port wakeup runtime functionality to SDK 2.0.0.

Author: Gadgetoid

micropython/board/PICO_W_ENVIRO/pico_sdk.patch renamed to micropython/board/PICO_W_ENVIRO/pico_sdk.off.patch

@@ -1,4 +1,25 @@
 #include "wakeup.h"
+#include "hardware/gpio.h"
+#include "wakeup.config.hpp"
+#include "pico/runtime_init.h"
+
+
+uint32_t runtime_wakeup_gpio_state = 0;
+
+// Pins to toggle on wakeup
+#ifndef PICO_WAKEUP_PIN_MASK
+#define PICO_WAKEUP_PIN_MASK ((0b1 << 2) | (0b1 << 6))
+#endif
+
+// Direction
+#ifndef PICO_WAKEUP_PIN_DIR
+#define PICO_WAKEUP_PIN_DIR ((0b1 << 2) | (0b1 << 6))
+#endif
+
+// Value
+#ifndef PICO_WAKEUP_PIN_VALUE
+#define PICO_WAKEUP_PIN_VALUE ((0b1 << 2) | (0b1 << 6))
+#endif
 
 static MP_DEFINE_CONST_FUN_OBJ_0(Wakeup_get_gpio_state_obj, Wakeup_get_gpio_state);
 static MP_DEFINE_CONST_FUN_OBJ_0(Wakeup_reset_gpio_state_obj, Wakeup_reset_gpio_state);
@@ -23,4 +44,17 @@ const mp_obj_module_t wakeup_user_cmodule = {
 MP_REGISTER_MODULE(MP_QSTR_wakeup, wakeup_user_cmodule, MODULE_WAKEUP_ENABLED);
 #else
 MP_REGISTER_MODULE(MP_QSTR_wakeup, wakeup_user_cmodule);
-#endif
+#endif
+
+void runtime_init_latch(void) {
+    runtime_wakeup_gpio_state = gpio_get_all();
+
+    gpio_init_mask(PICO_WAKEUP_PIN_MASK);
+    gpio_set_dir_masked(PICO_WAKEUP_PIN_MASK, PICO_WAKEUP_PIN_DIR);
+    gpio_put_masked(PICO_WAKEUP_PIN_MASK, PICO_WAKEUP_PIN_VALUE);
+};
+
+// After runtime_init_early_resets, PICO_RUNTIME_INIT_EARLY_RESETS ?
+PICO_RUNTIME_INIT_FUNC_HW(runtime_init_latch, "00101");
+// Too early?
+// PICO_RUNTIME_INIT_FUNC_HW(runtime_init_latch, PICO_RUNTIME_INIT_EARLIEST);