1、执行xWriteCH375Cmd(CMD_GET_IC_VER);返回B7，说明单片机和CH375B通信正常了；
2、执行xWriteCH375Cmd(CMD_CHECK_EXIST);
xWriteCH375Data（0xaa）;
i = xReadCH375Data();
没有反应，不回复，也不报错；
硬件说明：我硬件上是按TXD，RXD，GND这种方式接的，我想接STA，INT这种方式，但在手册上找不到STA引脚对应CH375B第几号脚？
3、我在发命令前加上两个同步码0x57,0xAB后会返回05F,如果这种三线制没有同步码，怎么区分数据和命令指令；
4、串口的设定参数我看到文档上写着是4800，但我程序要设为9600才能通信，不知CH375B默认的串口设定是一个什么情况；
下面是我串口的设定，麻烦帮我看一下有什么时候问题：
void USART_Configuration(void)
{
USART_InitTypeDef USART_InitStructure;
USART_ClockInitTypeDef USART_ClockInitStructure;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2,ENABLE);
USART_InitStructure.USART_BaudRate = 9600;
USART_InitStructure.USART_WordLength = USART_WordLength_9b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_Parity = USART_Parity_Even;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Rx|USART_Mode_Tx;
USART_Init(USART2, &USART_InitStructure);
/* The following example illustrates how to configure the USART1 Clock */
USART_ClockInitStructure.USART_Clock = USART_Clock_Disable;
USART_ClockInitStructure.USART_CPOL = USART_CPOL_High;
USART_ClockInitStructure.USART_CPHA = USART_CPHA_1Edge;
USART_ClockInitStructure.USART_LastBit = USART_LastBit_Enable;
USART_ClockInit(USART2, &USART_ClockInitStructure);
/* Enable USART1 */
USART_Cmd(USART2, ENABLE);
}
void USART2_Send_Byte(u8 OneByte)
{
/* Write one byte in the USART1 Transmit Data Register */
USART_SendData(USART2, OneByte);
/* Wait until end of transmit */
while(USART_GetFlagStatus(USART2, USART_FLAG_TC) == RESET);
USART_ClearFlag(USART2, USART_FLAG_TC);
}
UINT8 xReadCH375Data( void )
{
UINT8 Dat;
Dat = RxBuff[0];
return Dat;
}
void xWriteCH375Cmd( UINT8 mCmd )
{
USART2_Send_Byte(mCmd);
}
void xWriteCH375Data( UINT8 mData )
{
USART2_Send_Byte(mData);
DelayUs(2);
}