表1 GPIO寄存器配置说明
GROUP	IOMUX_BASE	GPIO_BASE	DIRECTION_OFFSET	SET_VALUE_OFFSET	GET_VALUE_OFFSET
0	0xC4000000	0xC4040000	0x4	0x0	0x50
1	0xC4000000	0xC4050000	0x4	0x0	0x50
2	0x82320000	0x820F0000	0x4	0x0	0x50
3	0x82320000	0x82100000	0x4	0x0	0x50
4	0xA0140000	0xA0160000	0x4	0x0	0x50
5	0x3001D0000	0x300160000	0x4	0x0	0x50
7	0x400140000	0x400150000	0x4	0x0	0x50
GROUP：为GPIO组号，Atlas 200I A2 加速模块当前不支持查询和设置第6组的GPIO管脚；第8组管脚为休眠唤醒与安全关机特性使用管脚，不支持寄存器配置。 IOMUX_BASE：GPIO复用关系配置基地址，每个管脚对应的复用关系配置偏移地址不同，详细复用关系请参考表2。 GPIO_BASE：GPIO寄存器基地址，基地址+偏移地址存储的值为一个32位的数值，该数值的每一位对应一个管脚的配置。 DIRECTION_OFFSET：GPIO管脚方向配置偏移地址，配置GPIO_BASE+ DIRECTION_OFFSET即可配置GPIO方向。 SET_VALUE_OFFSET：GPIO管脚值设置偏移地址，配置GPIO_BASE+ SET_VALUE_OFFSET即可配置GPIO管脚值。 GET_VALUE_OFFSET：GPIO管脚值查询偏移地址，查询GPIO_BASE+ GET_VALUE_OFFSET即可查询GPIO管脚值。

表2 管脚复用关系说明
GROUP	PIN	IOMUX_BASE	RESET_OFFSET	RESET_GPIO
0	0	0xC4000000	0x010	0x3
0	1	0xC4000000	0X014	0x3
0	2	0xC4000000	0x018	0x3
0	3	0xC4000000	0x01C	0x3
0	4	0xC4000000	0x020	0x0
0	5	0xC4000000	0x024	0x0
0	6	0xC4000000	0x028	0x0
0	7	0xC4000000	0x02c	0x0
0	8	0xC4000000	0x030	0x0
0	9	0xC4000000	0x034	0x0
0	10	0xC4000000	0x038	0x0
0	11	0xC4000000	0x03C	0x0
0	12	0xC4000000	0x0AC	0x3
0	13	0xC4000000	0x0B0	0x3
0	14	0xC4000000	0x0B4	0x3
0	15	0xC4000000	0x0B8	0x3
0	16	0xC4000000	0x0BC	0x3
0	17	0xC4000000	0x0C0	0x3
0	18	0xC4000000	0x0C4	0x3
0	19	0xC4000000	0x0C8	0x3
0	20	0xC4000000	0x0D4	0x3
0	21	0xC4000000	0x0D8	0x3
0	22	0xC4000000	0x0DC	0x3
0	23	0xC4000000	0x0E0	0x3
0	24	0xC4000000	0x0FC	0x3
0	25	0xC4000000	0x100	0x3
0	26	0xC4000000	0x114	0x0
0	27	0xC4000000	0x118	0x0
1	0	0xC4000000	0x0CC	0x3
1	1	0xC4000000	0x0D0	0x3
1	2	0xC4000000	0x0E4	0x3
1	3	0xC4000000	0x0E8	0x3
1	4	0xC4000000	0x0EC	0x3
1	5	0xC4000000	0x0F0	0x3
1	6	0xC4000000	0x0F4	0x3
1	7	0xC4000000	0x0F8	0x3
1	8	0xC4000000	0x11C	0x0
1	9	0xC4000000	0x120	0x0
1	10	0xC4000000	0x124	0x3
1	11	0xC4000000	0x128	0x3
2	9	0x82320000	0x000	0x3
2	10	0x82320000	0x004	0x3
2	11	0x82320000	0x028	0x3
2	12	0x82320000	0x02C	0x3
2	13	0x82320000	0x030	0x3
2	14	0x82320000	0x034	0x3
2	15	0x82320000	0x038	0x3
2	16	0x82320000	0x03C	0x3
2	17	0x82320000	0x040	0x3
2	18	0x82320000	0x044	0x3
2	19	0x82320000	0x048	0x3
2	20	0x82320000	0x04C	0x3
2	21	0x82320000	0x050	0x3
2	22	0x82320000	0x054	0x3
2	23	0x82320000	0x058	0x3
2	24	0x82320000	0x05C	0x3
2	25	0x82320000	0x060	0x3
2	26	0x82320000	0x064	0x3
2	27	0x82320000	0x068	0x3
2	28	0x82320000	0x06C	0x3
2	29	0x82320000	0x070	0x3
2	30	0x82320000	0x074	0x3
2	31	0x82320000	0x078	0x3
3	0	0x82320000	0x07C	0x3
3	1	0x82320000	0x080	0x3
3	2	0x82320000	0x084	0x3
3	3	0x82320000	0x088	0x3
3	4	0x82320000	0x08C	0x3
3	5	0x82320000	0x090	0x3
3	6	0x82320000	0x094	0x3
3	7	0x82320000	0x098	0x3
4	0	0xA0140000	0x0BC	0x0
4	1	0xA0140000	0x0C0	0x0
4	2	0xA0140000	0x068	0x3
4	3	0xA0140000	0x06C	0x3
4	4	0xA0140000	0x070	0x3
4	5	0xA0140000	0x074	0x3
4	6	0xA0140000	0x078	0x3
4	7	0xA0140000	0x07C	0x3
4	8	0xA0140000	0x080	0x3
4	9	0xA0140000	0x084	0x3
4	10	0xA0140000	0x088	0x3
4	11	0xA0140000	0x08C	0x3
4	12	0xA0140000	0x090	0x3
4	13	0xA0140000	0x094	0x3
4	14	0xA0140000	0x098	0x3
4	15	0xA0140000	0x09C	0x3
4	16	0xA0140000	0x0A0	0x3
4	17	0xA0140000	0x0A4	0x3
4	18	0xA0140000	0x0A8	0x3
4	19	0xA0140000	0x0AC	0x3
4	21	0xA0140000	0x0B4	0x3
4	22	0xA0140000	0x0B8	0x3
4	23	0xA0140000	0x0C4	0x3
4	24	0xA0140000	0x0C8	0x3
5	0	0x3001D0000	0x000	0x3
5	1	0x3001D0000	0x004	0x3
5	2	0x3001D0000	0x008	0x3
5	3	0x3001D0000	0x00C	0x3
5	4	0x3001D0000	0x010	0x3
5	5	0x3001D0000	0x014	0x3
5	6	0x3001D0000	0x018	0x3
5	7	0x3001D0000	0x01C	0x3
5	8	0x3001D0000	0x020	0x3
5	9	0x3001D0000	0x024	0x3
5	10	0x3001D0000	0x028	0x3
5	11	0x3001D0000	0x02C	0x3
5	12	0x3001D0000	0x030	0x3
5	13	0x3001D0000	0x034	0x3
5	14	0x3001D0000	0x038	0x3
5	15	0x3001D0000	0x03C	0x3
5	16	0x3001D0000	0x040	0x3
5	17	0x3001D0000	0x044	0x3
5	18	0x3001D0000	0x048	0x3
5	19	0x3001D0000	0x04C	0x3
7	1	0x400140000	0x000	0x3
7	2	0x400140000	0x030	0x3
7	3	0x400140000	0x034	0x3
7	4	0x400140000	0x038	0x3
7	5	0x400140000	0x03C	0x3
7	6	0x400140000	0x040	0x3
7	7	0x400140000	0x044	0x3
7	8	0x400140000	0x048	0x3
7	9	0x400140000	0x04C	0x3
7	10	0x400140000	0x050	0x3
7	11	0x400140000	0x054	0x3
7	12	0x400140000	0x058	0x3
7	13	0x400140000	0x05C	0x3
查询IOMUX_BASE+RESET_OFFSET的值。若查询值与RESET_GPIO相等，则说明当前管脚已经被复用为GPIO。若查询值与RESET_GPIO不相等，将IOMUX_BASE+RESET_OFFSET的值设为RESET_GPIO。表中未体现的管脚表明无复用关系，可直接作为GPIO管脚使用。详细使用方法请参考GPIO工具介绍。

表3 GPIO管脚编号映射表
GROUP	PIN_RANGE	START_ID	END_ID
0	0~31	0	31
1	0~31	32	63
2	0~31	64	95
3	0~31	476	507
4	0~31	128	159
5	0~31	160	191
7	0~31	224	255
此表说明GPIO管脚与其编号的对应关系。比如第N组第M个管脚的编号GPIO_ID为第N组的START_ID+M。

寄存器描述