30 lines
691 B
C++
30 lines
691 B
C++
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#ifndef DEVICE_USART0_H
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#define DEVICE_USART0_H
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#include <stdint.h>
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#include <stdio.h>
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/**
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* @brief USART0 串口模块。
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* @note 负责 GPIO 初始化、串口配置、TX 环形缓冲与中断驱动发送。
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*/
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class Usart0 {
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public:
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static void configurePins();
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static void init();
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static int putChar(int ch, FILE *f);
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static void onInterrupt();
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private:
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static uint16_t nextIndex(uint16_t idx);
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static bool isBufferFull();
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static bool isBufferEmpty();
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static constexpr uint16_t kTxBufSize = 256U;
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static uint8_t s_txBuf[kTxBufSize];
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static volatile uint16_t s_txHead;
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static volatile uint16_t s_txTail;
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};
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#endif /* DEVICE_USART0_H */
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