[参考译文] MSPM0G1507：UART Rx 中断问题

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Other Parts Discussed in Thread: MSPM0G3507

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https://e2e.ti.com/support/microcontrollers/arm-based-microcontrollers-group/arm-based-microcontrollers/f/arm-based-microcontrollers-forum/1484399/mspm0g1507-uart-rx-interrupt-issue

器件型号：MSPM0G1507
主题中讨论的其他器件：MSPM0G3507

工具与软件：

您好！

我正在使用 MSPM0G3507 LaunchPad 对 UART 进行编程。我使用的是"uart_echo_interrupts_standby_LP_MSPM0G3507_nortos_ticlang"。

我尝试从坞站灯 02 01 00 13 00 25 3D FC 发送以下消息、我可以在 UART 中断中接收相同的消息。

第二条消息是 02 01 00 20 00 0C 3D F6、仅接收部分字节。消息如图所示。

UART 配置如下：

/* clang-format off */
#define POWER_STARTUP_DELAY                                                (16)
#define CPUCLK_FREQ                                                     32000000
/* Defines for UART_0 */
#define UART_0_INST                                                        UART0
#define UART_0_INST_FREQUENCY                                              32768
#define UART_0_INST_IRQHandler                                  UART0_IRQHandler
#define UART_0_INST_INT_IRQN                                      UART0_INT_IRQn
#define GPIO_UART_0_RX_PORT                                                GPIOB
#define GPIO_UART_0_TX_PORT                                                GPIOB
#define GPIO_UART_0_RX_PIN                                         DL_GPIO_PIN_1
#define GPIO_UART_0_TX_PIN                                         DL_GPIO_PIN_0
#define GPIO_UART_0_IOMUX_RX                                     (IOMUX_PINCM13)
#define GPIO_UART_0_IOMUX_TX                                     (IOMUX_PINCM12)
#define GPIO_UART_0_IOMUX_RX_FUNC                      IOMUX_PINCM13_PF_UART0_RX
#define GPIO_UART_0_IOMUX_TX_FUNC                      IOMUX_PINCM12_PF_UART0_TX
#define UART_0_BAUD_RATE                                                  (9600)
#define UART_0_IBRD_33_kHZ_9600_BAUD                                         (1)
#define UART_0_FBRD_33_kHZ_9600_BAUD                                         (9)

static const DL_UART_Main_ClockConfig gUART_0ClockConfig = {
    .clockSel    = DL_UART_MAIN_CLOCK_LFCLK,
    .divideRatio = DL_UART_MAIN_CLOCK_DIVIDE_RATIO_1
};

static const DL_UART_Main_Config gUART_0Config = {
    .mode        = DL_UART_MAIN_MODE_NORMAL,
    .direction   = DL_UART_MAIN_DIRECTION_TX_RX,
    .flowControl = DL_UART_MAIN_FLOW_CONTROL_NONE,
    .parity      = DL_UART_MAIN_PARITY_NONE,
    .wordLength  = DL_UART_MAIN_WORD_LENGTH_8_BITS,
    .stopBits    = DL_UART_MAIN_STOP_BITS_ONE
};

SYSCONFIG_WEAK void SYSCFG_DL_UART_0_init(void)
{
    DL_UART_Main_setClockConfig(UART_0_INST, (DL_UART_Main_ClockConfig *) &gUART_0ClockConfig);
    DL_UART_Main_init(UART_0_INST, (DL_UART_Main_Config *) &gUART_0Config);    /*
     * Configure baud rate by setting oversampling and baud rate divisors.
     *  Target baud rate: 9600
     *  Actual baud rate: 9576.04     */
    DL_UART_Main_setOversampling(UART_0_INST, DL_UART_OVERSAMPLING_RATE_3X);
    DL_UART_Main_setBaudRateDivisor(UART_0_INST, UART_0_IBRD_33_kHZ_9600_BAUD, UART_0_FBRD_33_kHZ_9600_BAUD);
    /* Configure Interrupts */
    DL_UART_Main_enableInterrupt(UART_0_INST,DL_UART_MAIN_INTERRUPT_RX);
    DL_UART_Main_enable(UART_0_INST);
}

#include "ti_msp_dl_config.h"
#define UART_PACKET_SIZE 8
char rxPacket[UART_PACKET_SIZE];
volatile uint8_t gEchoData = 0;
uint8_t i=0;

int main(void)
{
    SYSCFG_DL_init();

    NVIC_ClearPendingIRQ(UART_0_INST_INT_IRQN);
    NVIC_EnableIRQ(UART_0_INST_INT_IRQN);
    //DL_SYSCTL_enableSleepOnExit();

    while (1) {
        __WFI();
    }
}
void UART_0_INST_IRQHandler(void)
{
    switch (DL_UART_Main_getPendingInterrupt(UART_0_INST)) {
        case DL_UART_MAIN_IIDX_RX:
            rxPacket[i++] = DL_UART_Extend_receiveDataBlocking(UART_0_INST);
            //rxPacket[i++]= DL_UART_Main_receiveData(UART_0_INST);
            //DL_UART_Main_transmitData(UART_0_INST, gEchoData);
            break;
        default:
            break;
    }
}