/************************************************************************************************
Author : ADI - Apps www.analog.com/AduC7060
Date : November 2007
File : UART_IRQ.c
Hardware : ADuC706x
Description : This simple example shows how to use the UART with interrupts.
If you open a Hyperterminal window and send a charachter to the Evaluation board,
It will return a string.
Baud rate settings: 9600-N-1
*************************************************************************************************/
// Bit Definitions
#define BIT0 0x01
#define BIT1 0x02
#define BIT2 0x04
#define BIT3 0x08
#define BIT4 0x10
#define BIT5 0x20
#define BIT6 0x40
#define BIT7 0x80
#define BIT8 0x100
#define BIT9 0x200
#define BIT10 0x400
#define BIT11 0x800
#define BIT12 0x1000
#define BIT13 0x2000
#define BIT14 0x4000
#define BIT15 0x8000
#include<aduc7060.h>
# include "stdio.h"
# include "string.h"
volatile unsigned char bSendResultToUART = 0; // Flag used to indicate ADC1 resutl ready to send to UART
unsigned char szTemp[64] = ""; // Used to store ADC1 result before printing to UART
unsigned char ucTxBufferEmpty = 0; // Used to indicate that the UART Tx buffer is empty
volatile unsigned char ucRxChar = 0; // Variable to read COMRX register into in IRQ handler
int main(void)
{
unsigned char i = 0;
unsigned char nLen = 0;
POWKEY1 = 0x1;
POWCON0 = 0x78; // Set core to max CPU speed of 10.24Mhz
POWKEY2 = 0xF4;
// Initialize the UART for 9600-8-N
GP1CON = BIT0 + BIT4; // Select UART functionality for P1.0/P1.1
COMCON0 = BIT7; // Enable access to COMDIV registers
COMDIV0 = 0x21; // Set baud rate to 9600.
COMDIV1 = 0x00;
//COMDIV2 = 0x21 + BIT11; // Enable fractional divider for more accurate baud rate setting
COMCON0 = BIT0 + BIT1 + BIT2;
COMIEN0 = BIT0 + BIT1; // Enable UART interrupts when Rx full and Tx buffer empty.
IRQEN = BIT11; // Enable UART interrupt source
bSendResultToUART = 0;
sprintf ( (char*)szTemp, "Waiting for byte from PC");// Send Opening String to the UART
nLen = strlen((char*)szTemp);
for ( i = 0 ; i < nLen ; i++ ) // loop to send opening String
{
COMTX = szTemp[i];
ucTxBufferEmpty = 0;
while (ucTxBufferEmpty == 0)
{
}
}
while (1)
{
if (bSendResultToUART == 1) // Is there an ADC1 result ready for UART transmission?
{
sprintf ( (char*)szTemp, "Received Charachter was : %d,\r\n\n",ucRxChar );// Send the Received charachter to the UART
nLen = strlen((char*)szTemp);
bSendResultToUART = 0;
for ( i = 0 ; i < nLen ; i++ ) // loop to send String
{
COMTX = szTemp[i]; // Load Tx buffer
ucTxBufferEmpty = 0;
while (ucTxBufferEmpty == 0) // Wait for Tx buffer empty interrupt to occur before reloading COMTX register
{
}
}
}
}
return 0x0;
}
void IRQ_Handler(void) __irq
{
unsigned long IRQSTATUS = 0;
unsigned char ucCOMIID0 = 0;
IRQSTATUS = IRQSTA; // Read off IRQSTA register
ucCOMIID0 = COMIID0; // Read the UART IRQ ID register
if ((IRQSTATUS & BIT11) == BIT11) //UART interrupt source
{
if ((ucCOMIID0 & 0x2) == 0x2) // Transmit buffer empty
{
ucTxBufferEmpty = 1;
}
if ((ucCOMIID0 & 0x1) == 0x1) // Receive buffer Full
{
ucRxChar = COMRX; // read COMRX register
bSendResultToUART = 1; // Set flag to return a string to the PC
}
}
}
发送正常，为什么接收不到串口调试助手发送的数据，硬件验证过没有问题