Other Parts Discussed in Thread: MSP430F5232, AM3352
I use the Ti MSP430F5232 's two UART to communicate, it's OK,
But I use the 430 to communicate with AM3352, the 430 can't recieve the infomation from AM3352; when 430 send message to 3352,the 3352 recieve messy code，
On both sides of the communication parameters are as follows：
baudrate Parity bit stop bits
AM3352： 115200 1 no
MSP430: 115200 1 no
my code as follow：
#include <msp430.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#define RBUF_SIZE 256
/*Set RTS*/
#define RTS_SWITCH_TIME 10000 //RTS switch time;
#define RTS_OUT (P4DIR |=BIT3) //set the RTS out;
#define RTS_UP (P4OUT |=BIT3 ) //set 485 at send Mode
#define RTS_DOWN (P4OUT &=~BIT3 ) //set 485 at recv mode
unsigned char read_cur_flag = 0 ;
/*RTS end*/
unsigned char *uca0_recv_buf; //uca0_recv buf for uart0
unsigned int byte_count0 = 0; //count for uart0
unsigned char *uca1_recv_buf; //uca0_recv buf for uart1
unsigned int byte_count1 = 0; //count for uart1
void UCA0_CFG(void)
{
P3SEL |= BIT3+BIT4; //configure GPIO as UART mode;
//UCA0CTL0 |=BIT5;
UCA0CTL1 |= UCSWRST; // **Put state machine in reset**
UCA0CTL1 |= UCSSEL_2; // SMCLK
UCA0BR0 = 9; // 1MHz 115200 (see User's Guide)
UCA0BR1 = 0;
UCA0MCTL |= UCBRS_1 + UCBRF_0; // Modulation UCBRSx=1, UCBRFx=0
UCA0CTL1 &= ~UCSWRST; // **Initialize USCI state machine**
UCA0IE |= UCRXIE; // Enable USCI_A0 RX interrupt
__bis_SR_register(GIE); // interrupts enabled
}
void UCA1_CFG(void)
{
P4SEL |=BIT5+BIT4; //configure GPIO as UART mode;
UCA1CTL1 |= UCSWRST; // **Put state machine in reset**
UCA1CTL1 |= UCSSEL_2; // SMCLK
UCA1BR0 = 9; // 1MHz 115200 (see User's Guide)
UCA1BR1 = 0;
UCA1MCTL |= UCBRS_1 + UCBRF_0; // Modulation UCBRSx=1, UCBRFx=0
UCA1CTL1 &= ~UCSWRST; // **Initialize USCI state machine**
UCA1IE |= UCRXIE; // Enable USCI_A0 RX interrupt
__bis_SR_register(GIE); // interrupts enabled
RTS_OUT; //configre the RTS for 485 communication;
RTS_UP;
sleep(1000);
}
/*
*led_conf
*/
void led_flashing(void)
{
P1DIR |= BIT0; // Set P1.0 to output direction
P1REN |=BIT0; //set pollup resistor;
P4DIR |= BIT7;
P4REN |=BIT7;
int k = 30;
while(k-- > 0)
{
P1OUT |=BIT0;
P4OUT |=BIT7;
int i=10050;
while(i-- > 0) ;
P1OUT &=~BIT0;
P4OUT &=~BIT7;
i=10050;
while(i-- > 0) ;
}
}
void uca0_SendByte(unsigned char ch)
{
while (!(UCA0IFG&UCTXIFG)); // USCI_A0 TX buffer ready?
UCA0TXBUF =ch; //UCA0RXBUF; // TX -> RXed character
}
void uca0_sendNByte(unsigned char*str, int len)
{
int i = 0;
for(i = 0 ;i < len ; i++)
{
uca0_SendByte(str[i]);
}
}
void uca1_SendByte(unsigned char ch)
{
unsigned char rc =read_cur_flag ;
sleep (1);
while(1) //wait for read interrupt end;
if((rc == read_cur_flag)&&(rc == 0))
break ;
RTS_DOWN; //set rts for 485 send mode;
sleep(RTS_SWITCH_TIME);
while (!(UCA1IFG&UCTXIFG)); // USCI_A1 TX buffer ready?
UCA1TXBUF =ch; //UCA0RXBUF; // TX -> RXed character
RTS_UP;
}
void uca1_sendNByte(unsigned char*str, int len)
{
int i = 0;
for(i = 0 ;i < len ; i++)
{
uca1_SendByte(str[i]);
}
}
unsigned int uca0_recv(unsigned char *str)
{
unsigned int i= 0;
if(byte_count0==0) return 0;
while(i <= byte_count0)
{
str[i] =uca0_recv_buf[i];
i++;
}
memset(uca0_recv_buf,0,byte_count0*sizeof(char));
byte_count0 = 0;
return i-1;
}
unsigned int uca1_recv(unsigned char *str)
{
unsigned int i= 0;
if(byte_count1==0) return 0;
while(i <= byte_count1)
{
str[i] =uca1_recv_buf[i];
i++;
}
memset(uca1_recv_buf,0,byte_count1*sizeof(char));
byte_count1 = 0;
return i-1;
}
//recieve interrupt for uart0!
#pragma vector=USCI_A0_VECTOR
__interrupt void USCI_A0_ISR(void)
{
switch(__even_in_range(UCA0IV,4))
{
case 0:break; // Vector 0 - no interrupt
case 2: // Vector 2 - RXIFG
if(byte_count0 < RBUF_SIZE && uca0_recv_buf !=NULL)
uca0_recv_buf[byte_count0++] = UCA0RXBUF;
break;
case 4:break; // Vector 4 - TXIFG
default: break;
}
}
//recieve interrupt for uart1!
#pragma vector=USCI_A1_VECTOR
__interrupt void USCI_A1_ISR(void)
{
read_cur_flag = 1;
switch(__even_in_range(UCA1IV,4))
{
case 0:break; // Vector 0 - no interrupt
case 2: // Vector 2 - RXIFG
if(byte_count1 < RBUF_SIZE && uca1_recv_buf !=NULL)
uca1_recv_buf[byte_count1++] = UCA1RXBUF;
break;
case 4:break; // Vector 4 - TXIFG
default: break;
}
read_cur_flag = 0;
}
void sleep(int count)
{
int i;
while(count-- > 0)
for(i = 0 ;i < 1000; i++) ;
}
#include <msp430.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include "UART.H"
/*
* main.c
*/
int main(void)
{
unsigned int res,len;
unsigned char buf[500]={0};
unsigned char buf1[500]={0};
unsigned char uca0_recv_tab[500]={0};
unsigned char uca1_recv_tab[500]={0};
WDTCTL = WDTPW + WDTHOLD; // Stop watchdog timer
uca0_recv_buf =buf;
uca1_recv_buf =buf1;
UCA0_CFG();
UCA1_CFG(); //configure the UART for loop;
while(1)
{
//uca0_recv(uca0_recv_tab);
uca0_sendNByte("234567",6);
//uca0_SendByte(0x55);
//sleep(1);
/*res =uca0_recv(uca0_recv_tab);
if((len =strlen(uca0_recv_tab)) > 0)
{
uca0_sendNByte(uca0_recv_tab, len);
}
sleep(1000);
led_flashing();
res =uca1_recv(uca1_recv_tab);
sleep(1000);
if((len =strlen(uca1_recv_tab)) > 0)
{
uca1_sendNByte(uca1_recv_tab, len);
}
sleep(1000);*/
}
while (1) ;//led_flashing();
return 0;
}