Hello weimingzhi,
I think you made a mistake with your last patch else if (strcmp(Ra0, "bu01:") shouldn't it be "bu10".
Also i have a question is that case 'i': case 'u' suppose to be case 'i': case 'I': ?
I think you made a mistake with your last patch else if (strcmp(Ra0, "bu01:") shouldn't it be "bu10".
Also i have a question is that case 'i': case 'u' suppose to be case 'i': case 'I': ?