通用的I/O模拟串口程序

chen_cheng_fly

于 2009-09-14 19:27:00 发布

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文章标签： timer buffer character input processing user

本文链接：https://blog.youkuaiyun.com/chen_cheng_fly/article/details/4552413

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本文介绍了一款通用的I/O模拟串口程序，它主要用于处理字符输入和缓冲区管理，适用于各种需要模拟串口通信的场景。该程序利用定时器实现数据收发，并能有效地处理用户输入的数据。

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程序匠人发表于 2006-3-14 23:43:00

通用的I/O模拟串口程序（适用于任何带有定时器的单片机）

// UART.C
//
// Generic software uart written in C, requiring a timer set to 3 times
// the baud rate, and two software read/write pins for the receive and
// transmit functions.
//
// * Received characters are buffered
// * putchar(), getchar(), kbhit() and flush_input_buffer() are available
// * There is a facility for background processing while waiting for input
//
// Colin Gittins, Software Engineer, Halliburton Energy Services
//
// The baud rate can be configured by changing the BAUD_RATE macro as
// follows:
//
// #define BAUD_RATE 19200.0
//
// The function init_uart() must be called before any comms can take place
//
// Interface routines required:
// 1. get_rx_pin_status()
// Returns 0 or 1 dependent on whether the receive pin is high or low.
// 2. set_tx_pin_high()
// Sets the transmit pin to the high state.
// 3. set_tx_pin_low()
// Sets the transmit pin to the low state.
// 4. idle()
// Background functions to execute

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