MCUXPRESSO IDE RT1064 实现同时2组UART/CAN数据转发，通过DMA读取，TCM提高代码运行效率，uart波特率2Mbps，CAN通讯速率200kbps

首先，可以使用MCUXpresso IDE提供的SDK来实现UART/CAN数据转发。可以将MCUXpresso SDK中的UART和CAN驱动程序集成到项目中，并使用DMA在TCM中进行数据传输以提高代码运行效率。以下是实现此功能的基本步骤：

1. 初始化UART和CAN模块并配置相应的波特率和通讯速率。

2. 配置DMA通道以实现数据传输。

3. 在TCM中创建缓冲区，并将DMA通道配置为使用TCM缓冲区进行数据传输。

4. 在主循环中，轮询UART和CAN接收数据，并将数据写入TCM缓冲区中。

5. 在DMA传输完成后，从TCM缓冲区中读取数据并将其发送到目标设备。

下面是一个简单的代码示例：

#include "fsl_uart.h"
#include "fsl_flexcan.h"
#include "fsl_dmamux.h"
#include "fsl_edma.h"

#define UART_RX_BUFFER_SIZE 256
#define CAN_RX_BUFFER_SIZE 256
#define TX_BUFFER_SIZE 256

uint8_t uart_rx_buffer[UART_RX_BUFFER_SIZE] __attribute__((section(".tcmbss")));
uint8_t can_rx_buffer[CAN_RX_BUFFER_SIZE] __attribute__((section(".tcmbss")));
uint8_t tx_buffer[TX_BUFFER_SIZE] __attribute__((section(".tcmbss")));

volatile bool uart_rx_done = false;
volatile bool can_rx_done = false;

void uart_callback(UART_Type *base, uart_handle_t *handle, status_t status, void *userData)
{
    if (status == kStatus_UART_RxIdle)
    {
        uart_rx_done = true;
    }
}

void can_callback(CAN_Type *base, flexcan_handle_t *handle, status_t status, uint32_t result, void *userData)
{
    if (status == kStatus_FLEXCAN_RxIdle)
    {
        can_rx_done = true;
    }
}

int main(void)
{
    uart_config_t uart_config;
    flexcan_config_t can_config;
    uart_handle_t uart_handle;
    flexcan_handle_t can_handle;
    edma_config_t dma_config;
    edma_handle_t dma_handle;
    dmamux_config_t dmamux_config;
    dmamux_source_t uart_rx_source;
    dmamux_source_t can_rx_source;

    /* Initialize UART */
    UART_GetDefaultConfig(&uart_config);
    uart_config.baudRate_Bps = 2000000;
    uart_config.enableTx = true;
    uart_config.enableRx = true;
    UART_Init(UART1, &uart_config, CLOCK_GetFreq(kCLOCK_Flexcomm1));
    UART_TransferCreateHandle(UART1, &uart_handle, uart_callback, NULL);

    /* Initialize CAN */
    FLEXCAN_GetDefaultConfig(&can_config);
    can_config.baudRate = 200000;
    FLEXCAN_Init(EXAMPLE_CAN, &can_config, CLOCK_GetFreq(kCLOCK_BusClk));
    FLEXCAN_SetRxMbConfig(EXAMPLE_CAN, kFLEXCAN_FrameFormatStandard, 1, true);
    FLEXCAN_SetRxMbFilter(EXAMPLE_CAN, 1, true, 0x123);
    FLEXCAN_SetRxMbHandler(EXAMPLE_CAN, 1, can_callback, NULL);
    FLEXCAN_StartRxMessageBuffer(EXAMPLE_CAN, 1, kFLEXCAN_RxNormal);

    /* Initialize DMA */
    EDMA_GetDefaultConfig(&dma_config);
    EDMA_Init(DMA0, &dma_config);
    DMAMUX_Init(DMAMUX0);
    DMAMUX_SetSource(DMAMUX0, 0, kDmaRequestMux0UART1Rx);
    DMAMUX_EnableChannel(DMAMUX0, 0);
    DMAMUX_SetSource(DMAMUX0, 1, kDmaRequestMux0FlexCan0);
    DMAMUX_EnableChannel(DMAMUX0, 1);
    EDMA_CreateHandle(&dma_handle, DMA0, 0);
    EDMA_PrepareTransfer(&dma_handle, &uart_rx_source, (void *)&UART1->RXDATA, sizeof(uint8_t), (void *)uart_rx_buffer,
                         sizeof(uint8_t), UART_RX_BUFFER_SIZE, kEDMA_PeripheralToMemory);
    EDMA_SubmitTransfer(&dma_handle, &uart_rx_source);
    EDMA_StartTransfer(&dma_handle);
    EDMA_PrepareTransfer(&dma_handle, &can_rx_source, (void *)&EXAMPLE_CAN->MB[1].DATA.W0, sizeof(uint8_t),
                         (void *)can_rx_buffer, sizeof(uint8_t), CAN_RX_BUFFER_SIZE, kEDMA_PeripheralToMemory);
    EDMA_SubmitTransfer(&dma_handle, &can_rx_source);
    EDMA_StartTransfer(&dma_handle);

    while (1)
    {
        if (uart_rx_done)
        {
            uart_rx_done = false;
            /* Process UART data */
            // ...
            EDMA_PrepareTransfer(&dma_handle, &uart_rx_source, (void *)&UART1->RXDATA, sizeof(uint8_t), (void *)uart_rx_buffer,
                                 sizeof(uint8_t), UART_RX_BUFFER_SIZE, kEDMA_PeripheralToMemory);
            EDMA_SubmitTransfer(&dma_handle, &uart_rx_source);
            EDMA_StartTransfer(&dma_handle);
        }
        if (can_rx_done)
        {
            can_rx_done = false;
            /* Process CAN data */
            // ...
            EDMA_PrepareTransfer(&dma_handle, &can_rx_source, (void *)&EXAMPLE_CAN->MB[1].DATA.W0, sizeof(uint8_t),
                                 (void *)can_rx_buffer, sizeof(uint8_t), CAN_RX_BUFFER_SIZE, kEDMA_PeripheralToMemory);
            EDMA_SubmitTransfer(&dma_handle, &can_rx_source);
            EDMA_StartTransfer(&dma_handle);
        }
    }
}

需要注意的是，这只是一个基本示例。实际应用中，可能需要更复杂的数据处理和错误处理逻辑。此外，还需要根据具体的应用场景进行性能测试和调整。