[参考译文] EVM430-CAPMINI：修改 UART 通信

尊敬的 Albert：

我相信您只需按如下所示修改 CAPT_UserConfig.h：

下一个取消注释 UART_Definitions.h 中的第69行并设置 = e (true)

然后、在代码中的某个位置复制此代码、并通过从代码中此处所示的表中选择波特率来填充此代码。

/*
 * The host_interface_uart module re-uses the driverlib code and structures used
 * for Captivate to GUI interface.
 */
//*****************************************************************************
//! def UART_SAMPLING_MODE defines the eUSCI_A LF or HF mode.
//! def UART_PRESCALER defines the eUSCI_A pre-scaler.
//! def UART_FIRST_STAGE_MOD defines the eUSCI_A first stage modulation.
//! def UART_SECOND_STAGE_MOD defines the eUSCI_A second stage modulation.
//*****************************************************************************
// Assumes SMCLK = 2MHZ
#define BAUD_19200

#ifdef BAUD_9600
// EUSCI runs @ 9600
#define UART_SAMPLING_MODE    (EUSCI_A_UART_OVERSAMPLING_BAUDRATE_GENERATION)
#define UART_PRESCALER                                              (13)
#define UART_FIRST_STAGE_MOD                                        (0)
#define UART_SECOND_STAGE_MOD                                       (69)

#elif defined BAUD_19200
// EUSCI runs @ 19.2K
#define UART_SAMPLING_MODE      (EUSCI_A_UART_OVERSAMPLING_BAUDRATE_GENERATION)
#define UART_PRESCALER                                                (6)
#define UART_FIRST_STAGE_MOD                                          (8)
#define UART_SECOND_STAGE_MOD                                         (17)

#elif defined BAUD_38400
// EUSCI runs @ 38.4K
#define UART_SAMPLING_MODE      (EUSCI_A_UART_OVERSAMPLING_BAUDRATE_GENERATION)
#define UART_PRESCALER                                                (3)
#define UART_FIRST_STAGE_MOD                                          (4)
#define UART_SECOND_STAGE_MOD                                         (4)

#elif defined BAUD_57600
// EUSCI runs @ 57.6K
#define UART_SAMPLING_MODE      (EUSCI_A_UART_OVERSAMPLING_BAUDRATE_GENERATION)
#define UART_PRESCALER                                                (2)
#define UART_FIRST_STAGE_MOD                                          (2)
#define UART_SECOND_STAGE_MOD                                         (187)

#elif defined BAUD_115200
// EUSCI runs @ 115.2K
#define UART_SAMPLING_MODE      (EUSCI_A_UART_LOW_FREQUENCY_BAUDRATE_GENERATION)
#define UART_PRESCALER                                                (17)
#define UART_FIRST_STAGE_MOD                                          (0)
#define UART_SECOND_STAGE_MOD                                         (74)

#elif defined BAUD_230400
// EUSCI runs @ 230.4K
#define UART_SAMPLING_MODE      (EUSCI_A_UART_LOW_FREQUENCY_BAUDRATE_GENERATION)
#define UART_PRESCALER                                                (8)
#define UART_FIRST_STAGE_MOD                                          (0)
#define UART_SECOND_STAGE_MOD                                         (214)

#elif defined BAUD_250000
// EUSCI runs @ 250K
#define UART_SAMPLING_MODE      (EUSCI_A_UART_LOW_FREQUENCY_BAUDRATE_GENERATION)
#define UART_PRESCALER                                                (8)
#define UART_FIRST_STAGE_MOD                                          (0)
#define UART_SECOND_STAGE_MOD                                         (0)

#else
#warning "NO BAUD RATE SELECTED"
#endif

/*
 * CREATE A LOCAL INSTANCE OF UART PARAMETERS
 * REFER TO TRACKPAD_DEMO.H FOR DEFINITIONS
 */
static const tUARTPort appUARTPort =
{
    .pbReceiveCallback = NULL,
    .pbErrorCallback = 0,
    .peripheralParameters.selectClockSource = EUSCI_A_UART_CLOCKSOURCE_SMCLK,
    .peripheralParameters.clockPrescalar = UART_PRESCALER,
    .peripheralParameters.firstModReg = UART_FIRST_STAGE_MOD,
    .peripheralParameters.secondModReg = UART_SECOND_STAGE_MOD,
    .peripheralParameters.parity = EUSCI_A_UART_NO_PARITY,
    .peripheralParameters.msborLsbFirst = EUSCI_A_UART_LSB_FIRST,
    .peripheralParameters.numberofStopBits = EUSCI_A_UART_ONE_STOP_BIT,
    .peripheralParameters.uartMode = EUSCI_A_UART_MODE,
    .peripheralParameters.overSampling = UART_SAMPLING_MODE
};
#endif




UART_openPort(&appUARTPort);

最后、调用以启用 UART -> UART_openPort (&appUARTPort)；