Complain if flashing cannot succeed; see #648 (#659)

2018-02-16 11:39:12 -08:00
parent 28cd4fc7a5
commit 838a7ce848
1 changed files with 5 additions and 0 deletions
--- a/editor/extension.ts
+++ b/editor/extension.ts
@@ -285,6 +285,11 @@ namespace pxt.editor {
                log("reset")
                return wrap.cortexM.reset(true)
            })
+            .then(() => wrap.cortexM.memory.readBlock(0x10001014, 1, pageSize))
+            .then(v => {
+                if (HF2.read32(v, 0) != 0x3C000)
+                    U.userError(U.lf("Please flash any MakeCode hex file using drag and drop. Flashing from app will work afterwards."))
+            })
            .then(() => getFlashChecksumsAsync(wrap))
            .then(buf => {
                checksums = buf