nop0x0000/BitBangUart

BitBangUart

This software is incomplete.

BitBanUart is a library for asynchronous serial communication using GPIO with a small embedded CPU.

Usage

#include "bit_bang_uart.h"

BitBangUart_Instance uart1;

int main(void)
{
    BitBangUart_Create(
        &uart1,
        BitBangUart_NumOfDataBit_8Bit,
        BitBangUart_ParityType_None,
        BitBangUart_StopBotLength_1Bit
    );

    EnableRxPinFallingInterrupt(); // Start Receiving.
}

// This function is called by RX pin falling edge interrupt.
void RxPinDetectedStartBitFallingEdge(void)
{
    BitBangUart_StartReceiving1Byte(&uart1);
    StartTimer();
    DisableRxPinFallingInterrupt();
}

// This function is called by timer interrupt.
void TimerInterruptRxBitCenter(void)
{
    if(BitBangUart_IsLastRxBit())
    {
        StopTimer();
        EnableRxPinFallingInterrupt();
    }

    bool bit = IsRxPinHigh();
    BitBangUart_Receive1Bit(&uart1, bit);
}

Document comments in source code.

Sorry. Document comments are written in Japanese. I am studying English. Please tell me when you find any mistake in this project.