诸如 LCR DLL DLH IER等寄存器,我都能写进去,再读出来,可FCR就是不行,
我把代码写在下面,哪位兄弟姐妹指导一下
//定义相关宏
#define UART_BASE_ADDR (0x20300000
#define C554_CH1_FCR (UART_BASE_ADDR+4)
#ifndef C554_REG_READ
#define C554_REG_READ(C554_reg, result)
result =
(*(volatile unsigned short *)(C554_reg)) #endif
#ifndef C554_REG_WRITE
#define C554_REG_WRITE(C554_reg, data)
(*(volatile unsigned short *)(C554_reg)) =
(data)
#endif
//写FCR寄存器
C554_REG_WRITE(C554_CH1_FCR, 0,0x1);// FCR0置1
C554_REG_WRITE(C554_CH1_FCR, 0,0x8f);// 向FCR寄存器写值 |
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