stm32f103c8t6 硬件spi驱动st7789v
STM32F103C8T6是意法半导体（STMicroelectronics）生产的一款基于ARM Cortex-M3内核的微控制器，它属于STM32系列的“价值线”产品，具有高性能、低功耗的特点。该芯片拥有48MHz的工作频率，内置32KB闪存、2KB SRAM，并提供了丰富的外设接口，如SPI、I2C、UART等，广泛应用于各种嵌入式系统设计。
ST7789V是一款由意法半导体推出的TFT液晶显示控制器，常用于小型彩色屏幕，如智能硬件、便携设备等。它支持SPI接口，能够提供高分辨率、高色彩深度的显示效果。
在硬件SPI驱动ST7789V的过程中，主要涉及以下几个关键知识点：
1. **STM32的SPI接口配置**：需要在STM32F103C8T6的GPIO端口上配置SPI的SCK、MISO、MOSI和NSS（或CS）引脚，确保它们工作在SPI模式。在STM32的标准库中，可以使用`RCC_APB2PeriphClockCmd`函数开启相应的时钟，再通过`GPIO_Init`函数设置GPIO模式和速度。
2. **SPI初始化**：使用`SPI_InitTypeDef`结构体配置SPI的参数，如工作模式（主/从）、数据帧格式（8位/16位）、波特率预分频器等。调用`SPI_Init`函数将这些配置应用到SPI peripheral。
3. **DMA（直接存储器访问）配置**：为了提高数据传输效率，可以启用DMA来自动处理SPI的数据传输。这需要配置DMA通道，设置源和目标地址，以及传输长度。同时，需要设置SPI的DMA请求使能。
4. **ST7789V的初始化命令序列**：ST7789V在使用前需要发送一系列初始化命令，以设置显示模式、分辨率、电压源、像素格式等。这些命令通常以特定的字节序列形式通过SPI发送。
5. **数据传输**：在初始化完成后，可以通过SPI接口发送显示数据到ST7789V。可以使用`SPI_SendData`函数单个字节地发送，或者在启用DMA的情况下，一次性发送大量数据。
6. **中断处理**：在SPI传输过程中，可以利用中断服务程序来处理数据发送完成或接收完成的事件，以便进行下一步操作。
7. **软件定时器**：有时，为了控制显示更新的节奏，可能需要使用软件定时器来安排特定时间间隔的操作，如刷新屏幕。
在给定的压缩包文件中，可能包含了Keil项目文件（如`.uvprojx`）、编译中间文件（如`.o`）、工程配置文件（如`.uvoptx`）以及用户代码文件（如`user`目录下的`.c`或`.h`文件）。这些文件组合在一起，构成了一个完整的STM32F103C8T6驱动ST7789V的工程实例，可以直接在Keil环境中编译和下载到开发板运行。
总结来说，这个项目展示了如何使用STM32的标准库通过硬件SPI接口驱动ST7789V液晶显示屏，涵盖了微控制器的GPIO配置、SPI接口设置、DMA使用、LCD初始化及数据传输等多个关键知识点。对于学习STM32嵌入式开发和显示技术的开发者来说，这是一个非常实用的学习资源。
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本站所有资源不代表本站的观点或立场，基于网友分享，根据中国法律《信息网络传播权保护条例》第二十二条之规定，若资源存在侵权或相关问题请联系本站客服人员，zhiweidada#qq.com，请把#换成@，本站将给予最大的支持与配合，做到及时反馈和处理。关于更多版权及免责申明参见 版权及免责申明