TC264串口通信例程

以下是 TC264 的串口通信例程，以使用 UART2 为例：

#include <stdio.h>
#include "Ifx_Types.h"
#include "IfxCpu.h"
#include "IfxScuWdt.h"
#include "IfxPort.h"
#include "IfxAsclin_Asc.h"

#define ASC_TX_BUFFER_SIZE 64
#define ASC_RX_BUFFER_SIZE 64

uint8 ascTxBuffer[ASC_TX_BUFFER_SIZE + sizeof(Ifx_Fifo) + 8];
uint8 ascRxBuffer[ASC_RX_BUFFER_SIZE + sizeof(Ifx_Fifo) + 8];

IfxAsclin_Asc asc;

void init_serial_interface(void)
{
    IfxAsclin_Asc_Config config;

    // 初始化 UART2 引脚
    const IfxAsclin_Asc_Pins pins = {
        &IfxPort_P14_0_RXD2A_P40,
        &IfxPort_P14_1_TXD2_P40,
        IfxPort_InputMode_pullUp,
        IfxPort_OutputMode_pushPull,
        IfxPort_PadDriver_cmosAutomotiveSpeed1
    };
    IfxAsclin_Asc_initModuleConfig(&config, &MODULE_ASCLIN0);
    config.baudrate.prescaler = 1;
    config.baudrate.baudrate = 115200;
    config.dataWidth = IfxAsclin_DataWidth_8;
    config.stopBits = IfxAsclin_StopBit_1;
    config.parityBit = IfxAsclin_ParityBit_no;
    config.rxBuffer = ascRxBuffer;
    config.rxBufferSize = ASC_RX_BUFFER_SIZE;
    config.txBuffer = ascTxBuffer;
    config.txBufferSize = ASC_TX_BUFFER_SIZE;
    config.rxBufferMode = IfxAsclin_BufferMode_rxFifo;
    config.txBufferMode = IfxAsclin_BufferMode_txFifo;
    config.interrupt.rxPriority = ISR_PRIORITY(INTERRUPT_ASC_0_RX);
    config.interrupt.txPriority = ISR_PRIORITY(INTERRUPT_ASC_0_TX);
    config.interrupt.erPriority = ISR_PRIORITY(INTERRUPT_ASC_0_EX);
    config.interrupt.typeOfService = IfxSrc_Tos_cpu0;
    IfxAsclin_Asc_initModule(&asc, &config);

    // 使能 UART2
    IfxAsclin_enableModule(&asc);
}

int main(void)
{
    IfxCpu_enableInterrupts();
    IfxScuWdt_disableCpuWatchdog(IfxScuWdt_getCpuWatchdogPassword());

    init_serial_interface();

    while (1)
    {
        // 等待接收到数据
        while (IfxAsclin_Asc_getRxBufferLevel(&asc) == 0);
        uint8 rxData = IfxAsclin_Asc_read8(&asc);

        // 将接收到的数据通过串口发送回去
        while (IfxAsclin_Asc_getTxBufferLevel(&asc) == ASC_TX_BUFFER_SIZE);
        IfxAsclin_Asc_write8(&asc, rxData);
    }

    return 0;
}

该例程初始化 UART2 的引脚、时钟和参数，并通过中断方式接收和发送数据。在主循环中，等待接收到数据后将其通过串口发送回去。