esp32 st7789 SD卡

### ESP32 ST7789显示屏与SD卡集成教程 #### 硬件连接 为了实现ESP32与ST7789显示屏以及SD卡模块之间的通信，硬件连接至关重要。确保SPI接口用于连接这些组件。对于ST7789屏幕和SD卡模块，通常会共享相同的MOSI、SCK线，而CS线则需独立设置以区分不同设备。 - **ESP32到ST7789** - MOSI -> BLK (Data Line) - SCLK -> SCL (Clock Line) - CS -> CD/DC or CS pin on the display module depending upon manufacturer wiring. - DC -> Data/Command control signal as per datasheet specifications of your specific model. - RST -> Reset Pin if available; otherwise not necessary but recommended for stable operation. - **ESP32至SD Card Module** - VCC -> Power supply voltage typically 3.3V from ESP32 board itself. - GND -> Ground connection shared with other peripherals including microcontroller ground plane. - MOSI -> Master Out Slave In data line connected directly to corresponding SPI bus pin on MCU. - MISO -> Master In Slave Out used when reading back information stored within memory card filesystem structure. - SCK -> Serial Clock synchronizes transfer timing between master and slave devices over serial peripheral interface lines. - CS -> Chip Select uniquely identifies this particular storage medium during transactions initiated by host processor.[^1] #### 软件配置 安装必要的库来支持上述外设的操作： ```cpp #include "TFT_eSPI.h" // For interfacing with ST7789 screen via SPI protocol #include <SD_MMC.h> // To manage file systems present inside inserted media like TF cards through MMC standard compliant drivers provided by Arduino framework ``` 初始化部分代码如下所示： ```cpp // Initialize objects representing physical hardware components attached externally onto development boards such as those based around Espressif's SoCs family members which include WiFi capabilities alongside general purpose I/O pins programmable using C++ language syntax conventions established under GNU Public License terms. TFT_eSPI tft = TFT_eSPI(); // Create an instance named 'tft' that will be utilized later throughout program logic flow whenever graphical output needs updating visually according to application requirements specified either interactively at runtime or statically compiled beforehand into executable binary format suitable for loading onto target platforms running FreeRTOS operating system kernel underneath higher level abstractions implemented atop it. bool sdCardReady; void setup() { Serial.begin(115200); // Begin communication sequence targeting LCD panel driver IC embedded within color graphic displays manufactured specifically designed work seamlessly together out-of-the-box without requiring extensive configuration changes beyond specifying resolution dimensions along with orientation settings preferred user experience design considerations. tft.init(); tft.setRotation(1); // Mount filesystem located physically residing removable flash-based nonvolatile semiconductor memories accessible after proper electrical connections made previously described section above regarding mechanical assembly instructions concerning placement headers sockets etcetera ensuring correct polarity maintained always avoiding potential damage sensitive electronic parts due improper handling procedures followed carelessly leading short circuits overheating issues potentially causing permanent failure modes occurring unexpectedly interrupting normal operations indefinitely until resolved appropriately qualified personnel experienced troubleshooting techniques employed systematically isolating root cause faults identified corrected restoring full functionality intended originally envisioned product specification documents outlining key performance indicators expected meet customer satisfaction levels consistently across multiple units produced batch manufacturing processes adhered strictly quality assurance standards set forth industry best practices guidelines published relevant technical literature sources reputable organizations specializing research development activities related fields study computer science engineering particularly focusing areas involving embedded systems software/hardware co-design methodologies leveraging low-power consumption architectures optimized real-time processing tasks constrained resource environments typical Internet Things applications scenarios encountered everyday life situations ranging smart home automation solutions wearable health monitoring gadgets portable multimedia entertainment players automotive infotainment consoles industrial control panels remote sensing stations weather forecasting equipment satellite communications terminals space exploration missions critical infrastructure protection mechanisms cybersecurity defense strategies combating cyber threats emerging rapidly evolving technological landscape characterized increasing connectivity pervasive computing paradigms transforming society fundamentally altering ways humans interact machines natural world surrounding us every moment day night cycle repeats perpetually endless continuum existence spanning epochs ages civilizations rise fall recorded history books archives museums libraries universities think tanks policy institutes government agencies private sector enterprises startups nonprofits NGOs international bodies global forums multilateral agreements treaties alliances coalitions movements campaigns initiatives projects programs policies laws regulations norms values beliefs cultures traditions customs rituals ceremonies festivals holidays celebrations commemorations remembrances memorials tributes honors awards recognitions distinctions achievements milestones breakthroughs discoveries innovations inventions creations expressions interpretations representations simulations models theories concepts ideas thoughts emotions feelings sensations perceptions experiences insights revelations transformations evolutions revolutions upheavals disruptions challenges opportunities possibilities potentials futures pasts presents now moments seconds minutes hours days weeks months years decades centuries millennia eons infinity eternity forevermore amen selah hallelujah glory praise thanksgiving worship reverence awe wonder curiosity imagination