Design of Oral English Teaching Based on Embedded Microprocessor

Table 1

The GPIO registers.

Name	Address	Describe
IOPIN	0xE0028000	Pin value register, the current state of the pin is read from this register
IOSET	0xE0028004	Output setting register, only I can be written, and the corresponding pin outputs are high level
IOCLR	0xE0028008	Output clear register, can only write 1, and the corresponding pin outputs are low level
IODIR	0xE0028000	Direction control register to control the direction of each I/O