esptool.py 文件源码

def run_stub(self, stub=None):
        if stub is None:
            if self.IS_STUB:
                raise FatalError("Not possible for a stub to load another stub (memory likely to overlap.)")
            stub = self.STUB_CODE

        # Upload
        print("Uploading stub...")
        for field in ['text', 'data']:
            if field in stub:
                offs = stub[field + "_start"]
                length = len(stub[field])
                blocks = (length + self.ESP_RAM_BLOCK - 1) // self.ESP_RAM_BLOCK
                self.mem_begin(length, blocks, self.ESP_RAM_BLOCK, offs)
                for seq in range(blocks):
                    from_offs = seq * self.ESP_RAM_BLOCK
                    to_offs = from_offs + self.ESP_RAM_BLOCK
                    self.mem_block(stub[field][from_offs:to_offs], seq)
        print("Running stub...")
        self.mem_finish(stub['entry'])

        p = self.read()
        if p != b'OHAI':
            raise FatalError("Failed to start stub. Unexpected response: %s" % p)
        print("Stub running...")
        return self.STUB_CLASS(self)