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TI_RTOS for msp 43x 如何使用库函数实现GPIO并口写入

c y
Prodigy 221 points


在GPIO.h文件中只有如下写操作，只能实现位写入，是否有其他写函数可是实现并口写入。

/*!
* @brief Writes the value to a GPIO pin
*
* @param index GPIO index
* @param value must be either 0 or 1
*/
extern void GPIO_write(unsigned int index, unsigned int value);

期待您的回复，谢谢.

  • 0
    Guru 67475 points

    楼主可以看看这个中文教程

    http://bbs.21ic.com/icview-900756-1-2.html

  • 0 回复 灰小子
    Prodigy 221 points

    已经成功找到需要的库函数，可以实现，io口并口配置，我在接下来使用rtos 驱动spi时遇到如下问题，运行SPI_transfer()函数后，无法运行接下来的程序，仿真发现运行SPI_transfer()函数前，spi 的io口已配置成功，运行SPI_transfer()函数后，spi的RXBUF中已经有数据，就是无法运行后面的函数。主要的taskFxn函数如下：

    void pm25ld020taskFxn(UArg arg0, UArg arg1) {


    GPIO_write(ZKS_GASSENSOR_X2_SPI_PM25LD020_CE,
    ZKS_GASSENSOR_X2_PM25LD020_ENABLE);

    SPI_Handle spi_handle_pm25ld020;
    Bool transferOK;
    SPI_Params spiParams_pm25ld020;
    SPI_Params_init(&spiParams_pm25ld020);
    spiParams_pm25ld020.transferMode = SPI_MODE_BLOCKING;
    spiParams_pm25ld020.transferCallbackFxn = NULL;
    spiParams_pm25ld020.bitRate = 8000000;
    spi_handle_pm25ld020 = SPI_open(Board_SPI_PM25LD020, &spiParams_pm25ld020);

    SPI_Transaction spi_transaction_pm25ld020;
    UChar transmitBuffer[1] = { 0x9f };
    UChar receiveBuffer[4] = { 0x04 };
    spi_transaction_pm25ld020.count = 4;
    spi_transaction_pm25ld020.txBuf = (Ptr) transmitBuffer;
    spi_transaction_pm25ld020.rxBuf = (Ptr) receiveBuffer;
    transferOK = SPI_transfer(spi_handle_pm25ld020, &spi_transaction_pm25ld020);
    __no_operation();
    GPIO_write(ZKS_GASSENSOR_X2_SPI_PM25LD020_CE,
    ZKS_GASSENSOR_X2_PM25LD020_DISABLE);
    if (!transferOK) {
    /* Error in SPI transfer or transfer is already in progress */
    }

    }

    希望能得到您的帮助，谢谢。