unsigned int USART1_Rx(unsigned char *buffers, unsigned int length)
{
int size = USART1_RxAvailable();
int first_read;
SUSART_Buffers_RX *ptr=&RXBuffers;
if(!size)
return 0;
if(length >= size)
length = size;
if((size+ptr->PtrCons) >= NUM_RX_BUFFERS)
{
//buffer wrap around
first_read = NUM_RX_BUFFERS - ptr->PtrCons;
//copy from current point to end of buffer
memcpy(buffers, &ptr->Buffers[ptr->PtrCons], first_read);
//continue data copy from buffer starting
memcpy(&buffers[first_read], &ptr->Buffers[0], length-first_read);
ptr->PtrCons = length-first_read;
}
else
{
memcpy(buffers, &ptr->Buffers[ptr->PtrCons], size);
ptr->PtrCons += size;
}
//reading read length
return length;
}
/*******************************************************************************
* 函数名：主函数
* 功 能：
* 参 数：
* 返 回：
*******************************************************************************/
int main(void)
{
SystemInit();
Delay_init(72);
NVIC_Configuration();
USART1_Init(9600);
while(1)
{
//Delayms(100);
//UART1_PrintChar(0x55);
//UART1_PrintBuff(buf, 6);
//UART1_PrintString("string...");
len = USART1_RxAvailable();
if( len > 0 )
{
tx_len = USART1_ReadRxBUF(buf, len);
USART1_PrintBuff(buf, tx_len);
}
}
}
