Question

我对STM32429zi-disc1卡usart2外围有一些问题。我正在通过USB将数据发送到rs232转换，但数据有误。我认为，波特率与我的选择不同。可能是它来自PLL。我该如何解决？

我的PLL设置如下：

************************* PLL Parameters *************************************/
/* PLL_VCO = (HSE_VALUE or HSI_VALUE / PLL_M) * PLL_N */
#define PLL_M      8
/* USB OTG FS, SDIO and RNG Clock =  PLL_VCO / PLLQ */
#define PLL_Q      7

#if defined (STM32F40_41xxx)
#define PLL_N      336
/* SYSCLK = PLL_VCO / PLL_P */
#define PLL_P      2
#endif /* STM32F40_41xxx */

#if defined (STM32F427_437xx) || defined (STM32F429_439xx)
#define PLL_N      360
/* SYSCLK = PLL_VCO / PLL_P */
#define PLL_P      2
#endif /* STM32F427_437x || STM32F429_439xx */

#if defined (STM32F401xx)
#define PLL_N      336
/* SYSCLK = PLL_VCO / PLL_P */
#define PLL_P      4
#endif /* STM32F401xx */

我的usart代码如下：

USART_InitStruct.USART_BaudRate = 115200;
USART_InitStruct.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStruct.USART_Mode = USART_Mode_Rx|USART_Mode_Tx;
USART_InitStruct.USART_Parity = USART_Parity_No;
USART_InitStruct.USART_StopBits = USART_StopBits_1;
USART_InitStruct.USART_WordLength = USART_WordLength_8b;
USART_Init(USART2,&USART_InitStruct);
USART_Cmd(USART2,ENABLE);
InitGPIO(   sGPIOD,
                    GPIO_Mode_AF,
                    GPIO_OType_PP,
                    GPIO_Speed_100MHz,
                    GPIO_PuPd_UP,
                    GPIO_Pin_5|GPIO_Pin_6);

GPIO_PinAFConfig(GPIOD,GPIO_PinSource5,GPIO_AF_USART2);
GPIO_PinAFConfig(GPIOD,GPIO_PinSource6,GPIO_AF_USART2);

主循环为：

while(1){

    while(!USART_GetFlagStatus(USART2, USART_FLAG_TXE));
    USART2->DR = 0x0002;
    _delay_ms(1000);

}//EOF  Loop

我的usart转换器是profilic和ch34

我有关于STM32429zi-disc1卡usart2外围设备的问题

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