色爱AV综合区

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                ??? > ???? > ?????? > MCU

                ?????3A+(Raspberry Pi 3 Model A+): ????or????

                  
                • ?????satuen
                • ?????21ic
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                • ????????????????????????????????

                ????????????????????????????????????????

                ?????????????????????????????????????????????????????????????????????????????????SBC???????????????????????????????????????????????????????????????????????????????????????????????????!

                ???????????????????????????Model B(+)??

                ????????????????????????????B/Zero???????Model A????????????????????

                ??????2014???Raspberry Pi Model A+ ???????????????????????????????????????????????????????????????????????????2018????????????Raspberry Pi 3 Model A+???????????????A??????????CPU?????????Raspberry Pi 3 Model B+???????????Broadcom BCM2837B0, Cortex-A53 (ARMv8) 64-bit SoC @ 1.4GHz????????????????????????????????????????????????????USB???????????????????????????????????????????WiFi/BT????

                ??????Raspberry Pi 3 Model B+??????????????????????Raspberry Pi 3 Model A+??????????????????????????Raspberry Pi 3 Model A+???????IoT?????????????????????

                rId21.jpg

                ???????????????????????????????????????Raspberry Pi 3 Model A+???!

                rId22.jpg

                ?????????HDMI??DSI??CSI????????????????????GPIO???40????USB???????

                rId23.jpg

                Raspberry Pi 3 Model A+????????????????????SD?????????512MB??DDR???????????????LPDDR2???????1066????????????????????????????

                rId24.jpg

                ????????Raspberry Pi 3 Model A+?????65 x 56mm????B?????Zero??????????????RPI3??????RPI3 B+???????B+?????????????????????????????????????????????????????????????????????????????

                Raspberry Pi 3 Model A+?????????????

                • CPU : ???BCM28370B0 Cortex-A53 64

                • RAM : 512 MB LPDDR2

                • WiFi : 802.11 b / g / n / ac dual band (2.4 and 5 GHz) ??Bluetooth 4.2

                • USB : 1 USB 2.0???

                • Extended GPIO??40??

                • CSI???

                • DSI???

                • ???????????????

                • SD???

                • USB??????5V/2.5A

                A???????????????2014????????????????????????????????????????512MB??????CPU?????BCM2837B0?????????RPI3 B+?????????CPU???????????????????????????????????????????????????????????????????????Raspberry Pi 3 Model A+??????????????????????(?????????????????????????F??)????????????????USB????????????????????????????????????????

                It's designed much more as a control board for computing projects or IoT installations. If nothing else, the lack of ports is going to more frustrating for those trying to use it as a miniature desktop computer than any speed issues.

                ???????????????????PI???????????????B???!

                ?????????SD?????????????????????SD????????????????????

                ?????????Raspberry Pi 3 Model A+???????????????????????????????????????????????????????????cmd??????????????headless??

                headless???????????????????Raspberry Pi 3 Model A+???????????????????????WiFi????????????????????SD????????boot?????????????????????????????ssh?????????????SSH????;??????????wpa_supplicant.conf???????????????????????????

                country=CN

                ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev

                update_config=1

                network={

                ssid="MyWiFiNetwork"

                psk="aVeryStrongPassword"

                key_mgmt=WPA-PSK

                }

                ??SSID??PSK?I???????????????????????Raspberry Pi 3 Model A+??

                ???SSH?????????????

                rId25.png

                ?????????????????????????????????????????????????

                rId26.png

                ??CPU????????????????sysbench????????????????????????????????????????????????????IoT????????????????CPU???????????????????RK3399??????????

                ?????????????????????????????????????!???????????ZERO??LCD??ADAFRUIT????????????????????????

                rId27.jpg

                ??????????????????????I2C????????????????HEADLESS???????????????!

                ??RPI?????Python??????????????????????????????????????????venv??????????????????????????????????????

                mkdir rpi3a_plus

                python3 -m venv rpi3a_plus/venv

                source rpi3a_plus/venv/bin/activate

                ?????????????????

                rId28.png

                ??venv?????????????????python??????adafruit-ssd1306??pillow????????LCD?????????????????????????????????????????

                LCD???I2C???????????????????RPI??????I2C???????rasps-config?????????????????

                rId29.png

                ???????

                git clone https://github.com/adafruit/Adafruit_Python_SSD1306.git

                ????????????????????????????????????????image.py????

                rId30.jpg

                Python????????????????????????????????????????????????????????????????????????????????????????LED?????I2C???????????????????????I2C????????3?????????????????I2C????????????

                rId31.png

                ??????Raspberry Pi 3 Model A+????????????????????????????????????????????????????????????????!?????????????????

                The folks over at the Foundation say that the A+ is “about closing things out in style” because whatever comes next will be “less of an evolution” and rather be a larger upgrade. Still, older models will continue to be available for those who need them, so if you need a 1 A+ despite this upgrade, you can still get one, at least for now.

                • ?????21ic???????????????!

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