CC2541 UART0发送会多几个字节

工程:以TI提供协议栈BLE-CC254X-1.4.2.2中SimpleBLEPeripheral为例程，HAL_LCD=FALSE/HAL_KEY=FALSE/HAL_UART=TRUE。

因为板子中采用UART0-ALT2改如下代码:

1.HalUARTInitDMA()函数中PERCFG &= ~HAL_UART_PERCFG_BIT;改为PERCFG |= HAL_UART_PERCFG_BIT;

#define PxSEL                      P1SEL
#define HAL_UART_PERCFG_BIT        0x01         // USART0 on P0, Alt-1; so clear this bit.
#define HAL_UART_PRIPO             0x00         // USART0 priority over UART1.
#define HAL_UART_Px_CTS            0x04         // Peripheral I/O Select for CTS flow control.
#define HAL_UART_Px_RTS            0x08         // Peripheral I/O Select for RTS must be manual.
#define HAL_UART_Px_SEL            0x30         // Peripheral I/O Select for Rx/Tx.

2.在main()函数中 HalDriverInit()；下面一行增加uart0_open();

static void npi_uart0_callback(uint8 port,uint8 events)

{

      if(events&(HAL_UART_RX_FULL|HAL_UART_RX_TIMEOUT))

      {

           uint8 len = 0;

          uint8 buff[200];

         len = NPI_RxBufLen();

        if(0!= len)

        {

           NPI_ReadTransport(buff,len);

           buff[100] = 0xA0;buff[101] = 0xA1;buff[102] = 0xA2;buff[103] = 0xA3;buff[104] = 0xA4;

          buff[105] = buff[0];buff[106] = buff[1];buff[107] = 0xA7;buff[108] = 0xA8;buff[109] = 0xA9;     

           NPI_WriteTransport(&buff[100],10);

       }

     }

}

void uart0_open(void)

{

NPI_InitTransport(npi_uart0_callback);

}

问题：

每隔100ms(用100-500ms都测试过)连续发送0X41 0X42,设备有时发送 A0 A1 A2 00 00 00 A4 41 42  A7 A8 A9?

不要带串口硬件控制引脚试试。