feat: 添加GD32E508 DCU应用工程的初始结构

- 新增完整的CMSIS解决方案配置，包含AC6/GCC/IAR/CLANG编译器支持 - 添加项目配置文件，定义了设备层、系统层、应用层的模块结构 - 配置ARM::CMSIS和GigaDevice::GD32E50x_DFP软件包依赖 - 创建多层代码架构：应用入口(main)、系统层(sys)、设备层(device) - 实现任务管理系统，包含任务调度器和任务执行器分离设计 - 集成ADC、CANFD、定时器、串口、温度采样等核心功能模块 - 添加详细的README文档说明项目结构和代码组织方式 - 配置AC6链接脚本和运行时环境文件 - 设置Git忽略规则以排除编译产物和临时文件
2026-05-10 17:28:14 +08:00
commit 4b8b47bc9b
116 changed files with 36659 additions and 0 deletions
@@ -0,0 +1,77 @@
+/**
+ * @file usart0.cpp
+ * @brief USART0 串口模块实现与 printf 重定向。
+ */
+
+#include "main.h"
+#include "device/usart0.h"
+#include "sys/config.h"
+
+uint8_t           Usart0::s_txBuf[Usart0::kTxBufSize];
+volatile uint16_t Usart0::s_txHead = 0U;
+volatile uint16_t Usart0::s_txTail = 0U;
+
+uint16_t Usart0::nextIndex(uint16_t idx)
+{
+    return (idx + 1U) % kTxBufSize;
+}
+
+bool Usart0::isBufferFull()
+{
+    return nextIndex(s_txHead) == s_txTail;
+}
+
+bool Usart0::isBufferEmpty()
+{
+    return s_txHead == s_txTail;
+}
+
+int Usart0::putChar(int ch, FILE *f)
+{
+    (void)f;
+    uint16_t next = nextIndex(s_txHead);
+    while(next == s_txTail) { /* 缓冲满，忙等重试 */ }
+
+    s_txBuf[s_txHead] = static_cast<uint8_t>(ch);
+    s_txHead = next;
+    usart_interrupt_enable(USART0, USART_INT_TBE);
+    return ch;
+}
+
+void Usart0::onInterrupt()
+{
+    if(usart_interrupt_flag_get(USART0, USART_INT_FLAG_TBE) != RESET) {
+        if(!isBufferEmpty()) {
+            usart_data_transmit(USART0, s_txBuf[s_txTail]);
+            s_txTail = nextIndex(s_txTail);
+        }
+        if(isBufferEmpty()) {
+            usart_interrupt_disable(USART0, USART_INT_TBE);
+        }
+    }
+}
+
+void Usart0::configurePins()
+{
+    rcu_periph_clock_enable(RCU_GPIOA);
+    gpio_init(GPIOA, GPIO_MODE_AF_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_9);
+    gpio_init(GPIOA, GPIO_MODE_IN_FLOATING, GPIO_OSPEED_50MHZ, GPIO_PIN_10);
+}
+
+void Usart0::init()
+{
+    rcu_periph_clock_enable(RCU_USART0);
+    usart_deinit(USART0);
+    usart_baudrate_set(USART0, CONFIG_USART0_BAUDRATE);
+    usart_word_length_set(USART0, USART_WL_8BIT);
+    usart_stop_bit_set(USART0, USART_STB_1BIT);
+    usart_parity_config(USART0, USART_PM_NONE);
+    usart_receive_config(USART0, USART_RECEIVE_ENABLE);
+    usart_transmit_config(USART0, USART_TRANSMIT_ENABLE);
+    usart_enable(USART0);
+    nvic_irq_enable(USART0_IRQn, 2U, 0U);
+}
+
+/* ----- 中断入口 / printf 重定向的 C 包装 --------------------------- */
+extern "C" int fputc(int ch, FILE *f)       { return Usart0::putChar(ch, f); }
+extern "C" void USART0_IRQHandler(void)     { Usart0::onInterrupt(); }