Add shared emulator services, waveform generation and STM32 USB boot ports

c/set-protocol/ports/stm32f407-usb-boot/boot_image.h

@@ -0,0 +1,19 @@
+#ifndef F407_BOOT_IMAGE_H
+#define F407_BOOT_IMAGE_H
+#include "boot_port.h"
+#include <string.h>
+
+static inline bool f407_vectors_valid(const uint8_t *image, uint32_t size)
+{
+    uint32_t sp, pc;
+    if (size < 8 || size > F407_APP_SIZE) return false;
+    memcpy(&sp, image, 4);
+    memcpy(&pc, image + 4, 4);
+    return !(sp & 7) &&
+        ((sp > 0x20000000UL && sp <= 0x20020000UL) ||
+         (sp > 0x10000000UL && sp <= 0x10010000UL)) &&
+        (pc & 1) && (pc & ~1UL) >= F407_APP_BASE &&
+        (pc & ~1UL) < F407_APP_BASE + size;
+}
+
+#endif