OALPAtoVA出问题吗？寄存器不听使唤了？？

ruoruo1997

OALPAtoVA出问题吗？寄存器不听使唤了？？ [复制链接]

我想利用2450的GPB3口的TOUT3功能发出PWM波。
在Kernel/Oal/init.c下的OEMInit()中添加代码。下面是我的代码：
    volatile S3C2450_IOPORT_REG *s2450IOP = (S3C2450_IOPORT_REG *)OALPAtoVA(S3C2450_BASE_REG_PA_IOPORT, FALSE);
    volatile S3C2450_PWM_REG *s2450PWM = (S3C2450_PWM_REG *)OALPAtoVA(S3C2450_BASE_REG_PA_PWM, FALSE);
//////OALPAtoVA函数PWM和GPIO相关寄存器地址映射

        s2450IOP->GPBCON  &= ~(0x000000c0);
           s2450IOP->GPBCON  |=  (2<<6);
//////////// GPB3 设为 TOUT3 功能

           RETAILMSG(1,(TEXT(" s2450IOP->GPBCON is %x \r\n", s2450IOP->GPBCON)));
///////////这里添加一个打印信息看GPB功能状态寄存器
                  
        s2450PWM->TCFG1 &= ~(0xf<<12);
        s2450PWM->TCFG1 |=  (2<<12);
///////////设定定时器3的divider=8

        s2450PWM->TCNTB3 = 0;
        s2450PWM->TCMPB3 = 0;
///////////双缓冲初始化

        RETAILMSG(1,(TEXT("before given, s2450PWM->TCNTB3 is %d \r\n",s2450PWM->TCNTB3)));
        RETAILMSG(1,(TEXT("before given, s2450PWM->TCMPB3 is %d \r\n",s2450PWM->TCMPB3)));
        //这里添加一个打印信息看双缓冲的值       
       
        s2450PWM->TCNTB3 = 100;
        s2450PWM->TCMPB3 = 30;
///////////设定周期和占空比               
               
        RETAILMSG(1,(TEXT("after given, s2450PWM->TCNTB3 is %d \r\n",s2450PWM->TCNTB3)));
        RETAILMSG(1,(TEXT("after given, s2450PWM->TCMPB3 is %d \r\n",s2450PWM->TCMPB3)));
///////////添加一个打印信息看赋值后的双缓冲的值

        s2450PWM->TCON &= ~( (1<<19)|(1<<18)|(1<<17)|(1<<16) );
        s2450PWM->TCON |= ( (1<<19)|(0<<18)|(1<<17)|(0<<16) );
         //auto reload,Inverter off,Update TCNTB3 & TCMPB3

        RETAILMSG(1,(TEXT("s2450PWM->TCON is %x \r\n",s2450PWM->TCON)));
///////////查看TCON的值

        RETAILMSG(1,(TEXT("s2450PWM->TCNTO3 is %d \r\n",s2450PWM->TCNTO3)));
/////////计数器更新后，查看计数器的值

        s2450PWM->TCON &= ~(1<<17);//clear Update manual

        s2450PWM->TCON |= (1<<16);
//////////timer3开始计时

但TOUT3口没出方波，从查看GPB功能状态寄存器的打印信息显示“s2450IOP->GPBCON is 0 ”，说明GPBCON的值没赋上。
before given, s2450PWM->TCNTB3 is -2131466966 --------该寄存器我赋值为0
before given, s2450PWM->TCMPB3 is -2131466930 --------该寄存器我赋值为0
after given, s2450PWM->TCNTB3 is -2131466930 ---------该寄存器我赋值为100
after given, s2450PWM->TCMPB3 is -2131466932 ---------该寄存器我赋值为30
s2450PWM->TCNTO3 is -2131466932 ----------------------该寄存器的值也不对
s2450PWM->TCON is 80f46532 ---------------------------该寄存器的16-19位的值跟我设的不一样



为什么会这样呢？？？？寄存器的值根本就和我设定的不一样呢？？？谢谢

hjlovelyh

写得太长了，写短一点就是：

我想利用2450的GPB3口的TOUT3功能发出PWM波。

因此要进行地址映射后对相关寄存器进行设定。

但我设置完相关的寄存器后，通过打印信息显示，寄存器的值跟我设定的不一样。

我怀疑是不是因为地址映射有问题没设置上？？谢谢

winsdli

查一下g_oalAddressTable在oemaddrtab_cfg.inc
另外可以试试MmMapIoSpace

qlyangel

地址映射有问题，谁做的，找他去

lfeng928

打印信息写错了，比如：
RETAILMSG(1,(TEXT("before given, s2450PWM->TCNTB3 is %d \r\n",s2450PWM->TCNTB3)));

应该是：
RETAILMSG(1,(TEXT("before given, s2450PWM->TCNTB3 is %d \r\n"),s2450PWM->TCNTB3));

我再试试看。。。。。。。。。