[Python知识库]trace32 python rcl 研究

源码位置

files/demo/api/python/rcl/dist/lauterbach-trace32-rcl-1.0.2

研究 T32_NotifyXXXX

T32_NotifyEventEnable 相当于 cmm 脚本中的“ON”
但 rcl 中并没有实现！
但在 _rc/_library.py 中却发现了相关的代码：

    def t32_notifystateenable(self, event_code, callback_function):
        """Enables notification at remote server and registers locally callback_function"""

        if event_code > 7:
            raise err.ApiNotificationEventCountExceedError(event_code)

        event_mask_value = 1 << event_code

        try:
            if event_code == T32_E_EDIT:
                result = self.generic_api_call(rapi_cmd=RAPI_CMD_EDITNOTIFY, opt_arg=0x00, payload=b"\x01\x00")
            else:
                result = self.generic_api_call(
                    rapi_cmd=RAPI_CMD_DEVICE_SPECIFIC,
                    opt_arg=RAPI_DSCMD_STATE_SETNOTIFIER,
                    payload=event_mask_value.from_bytes(2, byteorder="little"),
                )
        except err.ApiError as e:
            raise err.ApiNotificationEnableFail() from e
        else:
            self._notification_callback.update({event_code: callback_function})

        return result

简单修改后，发现没有用！原来是要调用 t32_checkstatenotify

参考的是：t32notifications.c 源码
rcl.py 的 class Debugger中 添加：

    # manfeel add
    def on_breakpoint(self, callback):
        return self.__library.t32_notifystateenable(0x00, callback)

    def poll_event(self, param):
        self.__library.t32_checkstatenotify(param)

同时修改 _library.py 的一处错误：

    def t32_notifystateenable(self, event_code, callback_function):
        """Enables notification at remote server and registers locally callback_function"""

        if event_code > 7:
            raise err.ApiNotificationEventCountExceedError(event_code)

        event_mask_value = 1 << event_code

        try:
            if event_code == T32_E_EDIT:
                result = self.generic_api_call(rapi_cmd=RAPI_CMD_EDITNOTIFY, opt_arg=0x00, payload=b"\x01\x00")
            else:
                result = self.generic_api_call(
                    rapi_cmd=RAPI_CMD_DEVICE_SPECIFIC,
                    opt_arg=RAPI_DSCMD_STATE_SETNOTIFIER,
                    # manfeel, to_bytes NOT from_bytes!
                    payload=event_mask_value.to_bytes(2, byteorder="little"),
                )
        except err.ApiError as e:
            raise err.ApiNotificationEnableFail() from e
        else:
            self._notification_callback.update({event_code: callback_function})

        return result

legacy：
AttributeError: dlsym(0x7faefa59bfb0, T32_NotifyEventEnable): symbol not found

可能是 ENABLE_NOTIFICATION 开关在编译 api 的时候没有打开！
进入：/Volumes/extworks/TRACE32_R_2021_02_000136263/files/demo/api/capi/dll
通过比较 makefile.linux 和 makefile.macosx，发现macosx里面并没有 使能 ENABLE_NOTIFICATION
但！makefile.linux 中是有定义的！！！
于是，修改 makefile.macosx

CFLAGS := -c -fPIC -DENABLE_NOTIFICATION

最后运行：
make -f makefile.macosx all