MSP430F6638: HC05蓝牙端口作从机无法在单片机上接收数据

将HC05蓝牙模块连接到MSP430端口无法接收主机数据，但蓝牙从机连接到电脑上是可以接收到主机的数据的

从机端口代码：

#include "driverlib.h"
bool UART_Init(uint16_t baseAddress, uint32_t Baudrate)
{float UART_Temp = 0;USCI_A_UART_initParam huart = {0};if(baseAddress == USCI_A0_BASE)//P3.3, P3.4 = USCI_A0 TXD/RXD{GPIO_setAsPeripheralModuleFunctionOutputPin(GPIO_PORT_P3, GPIO_PIN3);GPIO_setAsPeripheralModuleFunctionInputPin(GPIO_PORT_P3, GPIO_PIN4);}else if(baseAddress == USCI_A1_BASE)//P4.4, P4.5 = USCI_A1 TXD/RXD{GPIO_setAsPeripheralModuleFunctionOutputPin(GPIO_PORT_P8, GPIO_PIN2);GPIO_setAsPeripheralModuleFunctionInputPin(GPIO_PORT_P8, GPIO_PIN3);}if(Baudrate <= 9600){huart.selectClockSource = USCI_A_UART_CLOCKSOURCE_ACLK;UART_Temp = (float)UCS_getACLK()/Baudrate;}else{huart.selectClockSource = USCI_A_UART_CLOCKSOURCE_SMCLK;UART_Temp = (float)UCS_getSMCLK()/Baudrate;}if(UART_Temp < 16)huart.overSampling = USCI_A_UART_LOW_FREQUENCY_BAUDRATE_GENERATION;else{huart.overSampling = USCI_A_UART_OVERSAMPLING_BAUDRATE_GENERATION;UART_Temp /= 16;}huart.clockPrescalar = (int)UART_Temp;if(huart.overSampling == USCI_A_UART_LOW_FREQUENCY_BAUDRATE_GENERATION){huart.secondModReg = (int)((UART_Temp - huart.clockPrescalar) * 8);}else{huart.firstModReg = (int)((UART_Temp - huart.clockPrescalar) * 16);}huart.parity = USCI_A_UART_NO_PARITY;huart.msborLsbFirst = USCI_A_UART_LSB_FIRST;huart.numberofStopBits = USCI_A_UART_ONE_STOP_BIT;huart.uartMode = USCI_A_UART_MODE;if (STATUS_FAIL == USCI_A_UART_init(baseAddress, &huart)){return STATUS_FAIL;}//Enable UART module for operationUSCI_A_UART_enable(baseAddress);//Enable Receive InterruptUSCI_A_UART_clearInterrupt(baseAddress, USCI_A_UART_RECEIVE_INTERRUPT);USCI_A_UART_enableInterrupt(baseAddress, USCI_A_UART_RECEIVE_INTERRUPT);return STATUS_SUCCESS;
}

从机MAIN：

#include <msp430.h> 
#include <msp430f6638.h>
#include "driverlib.h"
#include "clk.h"
#include "dr_lcdseg.h"//调用段式液晶驱动头文件
/**
 * main.c
 */


int main(void)
{
	WDTCTL = WDTPW | WDTHOLD;	// stop watchdog timer
	P4DIR |=BIT5+BIT6+BIT7;  //控制LED5、LED4、LED3的IO口P4.5、P4.6、P4.7设置为输出
	P5DIR |=BIT7;//控制LED2的IO口P5.7设置为输出
	P8DIR |=BIT0;//控制LED1的IO口P8.0设置为输出
	initLcdSeg();//初始化段式液晶
	clk_Init ();
	UART_Init(USCI_A1_BASE, 9600);
	__bis_SR_register(GIE);while(1){

	}
}

#pragma vector=USCI_A1_VECTOR
__interrupt void USCI_A1_ISR (void)
{uint8_t receivedData = 0;switch (__even_in_range(UCA1IV,4)){//Vector 2 - RXIFGcase 2:receivedData = USCI_A_UART_receiveData(USCI_A1_BASE);//USCI_A_UART_transmitData(USCI_A1_BASE,receivedData);P8OUT &=~BIT0;P5OUT &=~BIT7;P4OUT ^=BIT7;P4OUT ^=BIT6;P4OUT ^=BIT5;break;default:break;}
}

主机端口：

#include "driverlib.h"
#include"UART.h"
void UARTInit()
{GPIO_setAsPeripheralModuleFunctionInputPin(GPIO_PORT_P3,GPIO_PIN3+GPIO_PIN4);USCI_A_UART_initParam param1 = {0};param1.selectClockSource = USCI_A_UART_CLOCKSOURCE_SMCLK;param1.clockPrescalar = 52;param1.firstModReg = 1;param1.secondModReg = 0;param1.parity = USCI_A_UART_NO_PARITY;param1.msborLsbFirst = USCI_A_UART_LSB_FIRST;param1.numberofStopBits = USCI_A_UART_ONE_STOP_BIT;param1.uartMode = USCI_A_UART_MODE;param1.overSampling = USCI_A_UART_OVERSAMPLING_BAUDRATE_GENERATION;if (STATUS_FAIL == USCI_A_UART_init(USCI_A0_BASE, &param1)){return;}USCI_A_UART_enable(USCI_A0_BASE);
}

void FS(unsigned char*write)//向串口写一个字符串
{while(*write!='\0'){USCI_A_UART_transmitData (USCI_A0_BASE,*write);__delay_cycles(5);write++;}USCI_A_UART_transmitData (USCI_A0_BASE,0x0d);USCI_A_UART_transmitData (USCI_A0_BASE,0x0a);
}
void FSNO(unsigned char*write)//向串口写一个字符串
{while(*write!='\0'){USCI_A_UART_transmitData (USCI_A0_BASE,*write);__delay_cycles(5);write++;}
}

void YS(int b)
{unsigned char a0[2]="0";unsigned char a1[2]="1";unsigned char a2[2]="2";unsigned char a3[2]="3";unsigned char a4[2]="4";unsigned char a5[2]="5";unsigned char a6[2]="6";unsigned char a7[2]="7";unsigned char a8[2]="8";unsigned char a9[2]="9";if(b==0){FSNO(a0);}else if(b==1){FSNO(a1);}else if(b==2){FSNO(a2);}else if(b==3){FSNO(a3);}else if(b==4){FSNO(a4);}else if(b==5){FSNO(a5);}else if(b==6){FSNO(a6);}else if(b==7){FSNO(a7);}else if(b==8){FSNO(a8);}else if(b==9){FSNO(a9);}

}




void HS(int a)
{

int b;
int c;
int e;
int f;
unsigned char sign[2]="-";
if(a>=0)
{
b= a%10;//个位数
c= a/ 10 % 10;//十位数
e= a/ 100 % 10;//百位数
f= a/ 1000;//千位数
if(f==0&&e==0&&c==0&&b!=0)
{
YS(b);
}
else if(f==0&&e==0&&c!=0)
{
YS(c);
YS(b);
}
else if(f==0&&e!=0)
{
 YS(e);
 YS(c);
 YS(b);
}
else if(f!=0)
{YS(f);YS(e);YS(c);YS(b);
}
}
else if(a<0)
{
a=-a;
b= a%10;//个位数
c= a/ 10 % 10;//十位数
e= a/ 100 % 10;//百位数
f= a/ 1000;//千位数
if(a<10)
{
FSNO(sign);
YS(b);
}
else if(f==0&&e==0&&c==0&&b!=0)
{
FSNO(sign);
YS(c);
YS(b);
}
else if(f==0&&e==0&&c!=0)
{
FSNO(sign);
 YS(e);
 YS(c);
 YS(b);
}
else if(f!=0)
{FSNO(sign);YS(f);YS(e);YS(c);YS(b);
}
















}

}

蓝牙配对成功，端口波特率均为9600，蓝牙都只能在电脑上接受数据而无法在单片机上接收数据，发送数据是没有问题的，但单片机直接使用串口通信可以接受数据顺利执行代码

Yale Li：

您好，您使用蓝牙接收数据和直接使用串口接收数据用的是一样的代码吗？

,

Su luo：

您好 是的

,

Yale Li：

串口可以接收数据说明您的配置应该是没有问题的。从机也是可以正常发送数据的吧？

,

Su luo：

是的 从机F6638和主机F5529都可以正常发送数据 但无法接收

,

Yale Li：

我建议您先检查一下蓝牙模块的配置，因为直接使用串口可以接收数据，说明问题不是出在这里

,

Su luo：

我们把问题都检查了一遍，在更换主从机（把F5529作为从机，F6638作为主机，蓝牙配置未变动）以后问题得到了解决。猜测应该是F6638单片机本身的问题，无法接收HC05的通讯。

,

Yale Li：

好的，我们已经收到了您的反馈，非常感谢！