2440的PWM我都搞不定!!!

只看该作者 · 2009-5-1 14:52

51机的PWM搞定了,但是,今天搞2440,竟然连个PWM都搞不定,气人ing
相关程序如下:
    //backlight control
    rCLKCON    |=    0x100;
    rTCFG0    &=    0xFFFF00;
    rTCFG0    |=    0x31;                //prescal by 50, T0~1
    rTCFG1    &=    ~0xF0;                //use timer1 ,1/2. 50MHz/50/2=500kHz
    rTCNTB1 =    0x19;
    rTCMPB1    =    0x15;
    rTCON    &=    0xFFFF0F;
    rTCON    |=    0xa0;
    rTCON    |=     0x10;                //start

请高人指点迷径