开源硬件Banana Pi BPI-R2的GPIO定义

BPI-R2集成MTK7623N 四核 ARM Cortex-A7 MP 支持主频1.3 ghz,BPI-R2 路由器提供丰富各种外设接口,包括 HDMI TX 高清接口, MIPI DSI 屏接口, PCIe2.0 接口, USB2.0 OTG 端口, USB3.0 端口, SATA 端口，5 千兆网口, 板载802.11a/b/g/n wifi 无线& BT4.1蓝牙 , 并且通过mini PCI-e支持 802.11ac/n WLAN。

BPI-R2 系统支持 Android5.1，并完善支持 OpenWRT,Debian linux,Ubuntu linux, Raspbian 和其他嵌入式操作系统. 尺寸与BPI-R1完全一样大小, 支持 1080P y高清视频输入,40 PIN GPIO 与 Raspberry Pi 3一致。

同香蕉派其他板一样，Banana Pi BPI-R2 也有40-pin GPIO 接口:

Banana Pi BPI-R2 的40 PIN GPIO 定义与树莓派 3 一亲，下面是 Banana Pi GPIO定义:

Banana pi BPI-R2 40 PIN GPIO 定义
GPIO Pin Name	Default Function
CON1-P01	VCC-3V3
CON1-P02	VCC-5V
CON1-P03	I2C\_SDA0	GPIO75
CON1-P04	VCC-5V
CON1-P05	I2C\_SCL0	GPIO76
CON1-P06	GND
CON1-P07	PWM-003	GPIO206
CON1-P08	UTXD1	GPIO80
CON1-P09	GND
CON1-P10	URXD0	GPIO81
CON1-P11	URXD1	GPIO80
CON1-P12	I2S0\_BCK	GPIO74
CON1-P13	UTXD0	GPIO79
CON1-P14	GND
CON1-P15	PWM-002	GPIO205
CON1-P16	URTS1	GPIO25
CON1-P17	VCC-3V3
CON1-P18	UCTS1	GPIO24
CON1-P19	SPI0\_MO	GPIO56
CON1-P20	GND
CON1-P21	SPI0\_MI	GPIO55
CON1-P22	PCM\_CLK	GPIO18
CON1-P23	SPI0\_CK	GPIO54
CON1-P24	SPI0\_CSN	GPIO53
CON1-P25	GND
CON1-P26	PCM\_RX	GPIO20
CON1-P27	I2C\_SDA1	GPIO57
CON1-P28	I2C\_SCL1	GPIO58
CON1-P29	PCM\_RST	GPIO22
CON1-P30	GND
CON1-P31	SPDIF\_OUT	GPIO200
CON1-P32	PCM\_TX	GPIO21
CON1-P33	I2S0\_MCLK	GPIO126
CON1-P34	GND
CON1-P35	I2S0\_LRCK	GPIO73
CON1-P36	PCM\_SYNC	GPIO19
CON1-P37	SPDIF\_IN1	GPIO202
CON1-P38	I2S0\_DATA\_IN	GPIO72
CON1-P39	GND
CON1-P40	I2S0\_DATA\_OUT	GPI049

有两种方式使用R2的GPIO-s:

使用调试接口/sys/devices/platform/1000b000。pinctrl/mt_gpio，参考脚本1

使用GPIO的通用接口:/sys/class/ GPIO /export和/sys/class/ GPIO /unexport，请参考脚本2

Script 1 (it can be used on Ubuntu system with kernel 4.4.x)

责任编辑:tzh