#define UTXH0 (0x50000020+3) //Byte_access address by DMA
#define URXH0 (0x50000024+3)
#define UTXH1 (0x50004020+3)
#define URXH1 (0x50004024+3)
#define UTXH2 (0x50008020+3)
#define URXH2 (0x50008024+3)
这段DMA定义是什么用途?
和#define RdURXH0() (*(volatile unsigned char *)0x50000027)用途不一样啊 |