CC3220SF UART读取中断触发失败

只看该作者 · 2020-10-21 20:39

SDK：simplelink_cc32xx_sdk_4_20_00_07 开发板：官方CC3220SF

起步例程：uartecho

在我实验完uartecho后，我尝试着自己写一个uart驱动，使用的回调模式，但奇怪的是，无论我发多少次数据，读回调中断始终没有触发，逻辑分析仪上可以看到TX发送的数据，为此我有些问题想请教：

1. 发送数据是否有数据格式？垃圾数据难道不能发送成功吗？如果有标准格式，那会是什么样的呢？

2. 我查看相关文档的时候，我注意到当FIFO被填满的时候中断也会触发，但实际情况是无论我发送多少次数据我都没办法触发读回调

3. 我的初始化配置是否正确？我的目的是想让两块CC3220SF互相通过uart通信。（使用了UARTDMA）

4. 感激不尽，望能一一解答，下面附上我的代码

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static const UARTCC32XXDMA_HWAttrsV1 uartCC32XXHWAttrs0 = {

    .baseAddr           = UART0_BASE,

    .intNum             = INT_UART0,

    .intPriority        = (~0),

    .flowControl        = UARTCC32XXDMA_FLOWCTRL_NONE,

    .rxChannelIndex     = UDMA_CH8_UARTA0_RX,

    .txChannelIndex     = UDMA_CH9_UARTA0_TX,

    .rxPin              = UARTCC32XXDMA_PIN_45_UART0_RX,

    .txPin              = UARTCC32XXDMA_PIN_62_UART0_TX,

    .ctsPin             = UARTCC32XXDMA_PIN_UNASSIGNED,

    .rtsPin             = UARTCC32XXDMA_PIN_UNASSIGNED,

    .errorFxn           = NULL

  };



/*

 *  ======== uartecho.c ========

 */

#include <stdint.h>

#include <stddef.h>



/* Driver Header files */

#include <ti/drivers/GPIO.h>

#include <ti/drivers/UART.h>

#include <ti/posix/ccs/unistd.h>

/* Driver configuration */

#include "ti_drivers_config.h"



#define MAX_NUM_RX_BYTES    30   // Maximum RX bytes to receive in one go

#define MAX_NUM_TX_BYTES    30   // Maximum TX bytes to send in one go

uint32_t wantedRxBytes;            // Number of bytes received so far

uint8_t rxBuf[MAX_NUM_RX_BYTES];   // Receive buffer

uint8_t txBuf[MAX_NUM_TX_BYTES];   // Transmit buffer





UART_Handle uart;

int32_t readCount;

uint8_t sendbuffer[20] = {0x40,0x10,0x40,0x10,0x40,0x10,0x80,0x20,0x80,0x20,0x80,0x20,0x80,0x20,0x80,0x20,0x20,0x20};

uint8_t recvicebuffer[16];

int c;

size_t i ;

void gpioButtonFxn0(uint_least8_t index)

{

    UART_write(uart, &sendbuffer, wantedRxBytes);

}

// Write callback function

static void writeCallback(UART_Handle handle, void *rxBuf, size_t size)

{

    // Do nothing

}

// Read callback function

static void readCallback(UART_Handle handle, void *rxBuf, size_t size)

{

    GPIO_toggle(CONFIG_GPIO_LED_0);

    // Make sure we received all expected bytes

    if (size == wantedRxBytes) {

        // Copy bytes from RX buffer to TX buffer

       for ( i = 0; i < size; i++)

           txBuf[i] = ((uint8_t*)rxBuf)[i];

       // Echo the bytes received back to transmitter

       UART_write(handle, txBuf, size);

       // Start another read, with size the same as it was during first call to

       // UART_read()

       UART_read(handle, rxBuf, wantedRxBytes);

       GPIO_toggle(CONFIG_GPIO_LED_1);

    }

    else {

        // Handle error or call to UART_readCancel()

    }

}









/*

 *  ======== mainThread ========

 */

void *mainThread(void *arg0)

{

    //char        input;

    const char  echoPrompt[] = "Echoing characters:\r\n";

    UART_Params uartParams;



    /* Call driver init functions */

    GPIO_init();

    UART_init();



    /* Configure the LED pin */

    GPIO_setConfig(CONFIG_GPIO_LED_0, GPIO_CFG_OUT_STD | GPIO_CFG_OUT_LOW);

    GPIO_setConfig(CONFIG_GPIO_LED_1, GPIO_CFG_OUT_STD | GPIO_CFG_OUT_LOW);

    GPIO_setConfig(CONFIG_BUTTON_0, GPIO_CFG_IN_PU | GPIO_CFG_IN_INT_FALLING);





    /* Turn on user LED */

    GPIO_write(CONFIG_GPIO_LED_0, CONFIG_GPIO_LED_OFF);

    GPIO_write(CONFIG_GPIO_LED_1, CONFIG_GPIO_LED_OFF);



    /* Install Button callback */

    GPIO_setCallback(CONFIG_BUTTON_0, gpioButtonFxn0);

    /* Enable interrupts */

    GPIO_enableInt(CONFIG_BUTTON_0);

    /* Create a UART with data processing off. */





    UART_Params_init(&uartParams);

    uartParams.writeMode     = UART_MODE_CALLBACK;

    uartParams.writeDataMode = UART_DATA_BINARY;

    uartParams.writeCallback = writeCallback;

    uartParams.readMode      = UART_MODE_CALLBACK;

    uartParams.readDataMode  = UART_DATA_BINARY;

    uartParams.readCallback  = readCallback;

    uartParams.baudRate = 115200;



    uart = UART_open(CONFIG_UART_0, &uartParams);

    if (uart == NULL) {

        /* UART_open() failed */

        while (1);

    }

    UART_write(uart, echoPrompt, sizeof(echoPrompt));

    wantedRxBytes = 16;

    int rxBytes = UART_read(uart, rxBuf, wantedRxBytes);





   // UART_write(uart, echoPrompt, sizeof(echoPrompt));



    /* Loop forever echoing */

    while (1) {

    }

}