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 |
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| CON1-P01 | VCC-3V3 |
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| CON1-P02 | VCC-5V |
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| CON1-P03 | I2C\_SDA0 | GPIO75 |
| CON1-P04 | VCC-5V |
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| CON1-P05 | I2C\_SCL0 | GPIO76 |
| CON1-P06 | GND |
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| CON1-P07 | PWM-003 | GPIO206 |
| CON1-P08 | UTXD1 | GPIO80 |
| CON1-P09 | GND |
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| CON1-P10 | URXD0 | GPIO81 |
| CON1-P11 | URXD1 | GPIO80 |
| CON1-P12 | I2S0\_BCK | GPIO74 |
| CON1-P13 | UTXD0 | GPIO79 |
| CON1-P14 | GND |
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| CON1-P15 | PWM-002 | GPIO205 |
| CON1-P16 | URTS1 | GPIO25 |
| CON1-P17 | VCC-3V3 |
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| CON1-P18 | UCTS1 | GPIO24 |
| CON1-P19 | SPI0\_MO | GPIO56 |
| CON1-P20 | GND |
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| CON1-P21 | SPI0\_MI | GPIO55 |
| CON1-P22 | PCM\_CLK | GPIO18 |
| CON1-P23 | SPI0\_CK | GPIO54 |
| CON1-P24 | SPI0\_CSN | GPIO53 |
| CON1-P25 | GND |
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| 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
|
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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) -------------------- SYS_FILE=/sys/devices/platform/1000b000.pinctrl/mt_gpio mt_gpio_mode() { pin=$1 mode=$2 if [ ! -f ${SYS_FILE} ]; then exit 1 fi
echo "mode $pin $mode" > ${SYS_FILE}
return 0 }
mt_gpio_dir() { pin=$1 dir=$2 if [ "x${dir}" == "xout" ]; then dir_val=1 else dir_val=0 fi if [ ! -f ${SYS_FILE} ]; then exit 1 fi
echo "dir $pin $dir_val" > ${SYS_FILE}
return 0 }
mt_gpio_out() { pin=$1 out=$2 if [ ! -f ${SYS_FILE} ]; then exit 1 fi
echo "out $pin $out" > ${SYS_FILE}
return 0 }
mt_gpio_in() { pin=$1 if [ ! -f ${SYS_FILE} ]; then exit 1 fi
echo "start $1" > ${SYS_FILE} result=`cat ${SYS_FILE} | grep "$1"`
if [ "x${result}" == "x" ]; then echo "can't get $pin status" exit 2 fi echo ${result} pin_val=`echo ${result} | awk -F ' |-' '{print $5}'` if [ ${pin_val} == "0" ] ; then return 0 else return 1 fi return 0
}
Script 2 (it can be used on Ubuntu system with kernel 4.4.x, and lede with kernel 4.9.x) ---------- #!/bin/ash
DIR=/sys/class/gpio/
global_gpio_offset=0
mt_gpio_init() { pin=$1
EXPORT=/sys/class/gpio/export UNEXPORT=/sys/class/gpio/unexport
name=`ls $DIR | grep chip` if [ x${name} != x ]; then echo "chip id : $name" else echo "No available gpio chip" exit 1 fi
base=`cat ${DIR}/${name}/base`
gpio_offset=`echo $((base+$pin))` global_gpio_offset=$gpio_offset
if [ -d ${DIR}/gpio${gpio_offset} ]; then return 0 else echo ${gpio_offset} > ${EXPORT} fi }
mt_gpio_init $1
if [ $2 == 'dir' ]; then if [ $3 == 'out' ]; then echo out > ${DIR}/gpio${global_gpio_offset}/direction else echo in > ${DIR}/gpio${global_gpio_offset}/direction fi elif [ $2 == 'val' ]; then if [ $# == 2 ]; then cat ${DIR}/gpio${global_gpio_offset}/value elif [ $# == 3 ]; then echo $3 > ${DIR}/gpio${global_gpio_offset}/value fi fi
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