UART双数据缓冲中断读取程序
中断服务程序代码：
#define RX_BUFFER_SIZE128
uint8BufferUsed = 0;//
uint8rx_buffer1[RX_BUFFER_SIZE]={0};
uint8rx_buffer2[RX_BUFFER_SIZE]={0};
CY_ISR(isr_UartRX_Interrupt)
{
/* Place your Interrupt code here. */
/* `#START isr_UartRX_Interrupt` */
uint8rec_status = 0u;
staticuint8pointerRX = 0u;
staticuint8buffer = 0;
uint8ReceiveChar = 0;
rec_status = UART_ReadRxStatus();//read the RX state
while(rec_status & UART_RX_STS_FIFO_NOTEMPTY)//there are data in the FIFO
{
if(pointerRX<RX_BUFFER_SIZE)
if(buffer%2==0)
rx_buffer1[pointerRX++] = UART_RXDATA_REG;
else
rx_buffer2[pointerRX++] = UART_RXDATA_REG;
else
{
pointerRX = 0;
buffer++;
BufferUsed = buffer;
}
rec_status = UART_ReadRxStatus();
}
/* `#END` */
/* PSoC3 ES1, ES2 RTC ISR PATCH */
#if(CYDEV_CHIP_FAMILY_USED == CYDEV_CHIP_FAMILY_PSOC3)
#if((CYDEV_CHIP_REVISION_USED <= CYDEV_CHIP_REVISION_3A_ES2) && (isr_UartRX__ES2_PATCH ))
isr_UartRX_ISR_PATCH();
#endif
#endif
}
Main函数处理代码：
//UART to PC communication
externuint8BufferUsed;
externuint8rx_buffer1[RX_BUFFER_SIZE];
externuint8rx_buffer2[RX_BUFFER_SIZE];
voidmain()
{
uint8LastBuffer = 0;
While（1）
{
UART_PutArray(MutiInfo,32);//send large information to PC
if(BufferUsed!=LastBuffer)//if there is one buffer data ready
{
if(BufferUsed%2)
{
//just send the buffer back to PC for verify
UART_PutArray(rx_buffer1,RX_BUFFER_SIZE);
//clean the buffer for next data receive
for(i=0;i<RX_BUFFER_SIZE;i++) rx_buffer1[i] = 0;
}
else
{
//just send the buffer back to PC for verify
UART_PutArray(rx_buffer2,RX_BUFFER_SIZE);
//clean the buffer for next data receive
for(i=0;i<RX_BUFFER_SIZE;i++) rx_buffer2[i] = 0;
}
LastBuffer = BufferUsed;//record current operate state
LCD_Char_1602_Position(1,0);
LCD_Char_1602_PrintString("UART Get data!");
}
}
}
