基于MSP430G2553的DS18B20测温程序.doc

/* * main.c */*include header file*/#include #include system.h#include uart.h#include ds18b20.hunsigned int temp;char tx_buf6 = 0,0,0,0,n,0;/* Function name: main* Descriptions: main function* input parameters: none* output parameters: none* Returned value:none*/void main(void)System_Init();UartInit();_EINT();if (DS18B20_Init()P1OUT |= BIT0;elseP1OUT |= BIT6;while (1)_delay_cycles(800000);_delay_cycles(800000);temp = DS18B20_GetTemp();/x_buf0 = temp%10000/1000+0;/tx_buf1 = temp%1000/100+0;/tx_buf2 = temp%100/10+0;/tx_buf3 = temp%10+0;tx_buf0 = temp%100/10+0;tx_buf1 = temp%10+0;Uart_SendStr(tx_buf);/*Include header file*/#include #include system.h/*Function Declaration*/void Config_WDT(void);void Config_Clock(void);void Config_IO(void);/* Function name: Config_WDT* Descriptions: WatchDog Timer Configuration* input parameters: none* output parameters: none* Returned value: none*/void Config_WDT(void)WDTCTL = WDTPW + WDTHOLD; / Stop watchdog timer/* Function name: Config_Clock* Descriptions: System Clock Configuration* input parameters: none* output parameters: none* Returned value: none*/void Config_Clock(void)BCSCTL1 = CALBC1_8MHZ;/ Set DCO 1M 8M 12M 16MDCOCTL = CALDCO_8MHZ;BCSCTL2 = SELM_1 + DIVM_1 + DIVS_3;/ MCLK = 8M;SMCLK = 1MBCSCTL2 &= SELS;if (CALBC1_8MHZ = 0xFF | CALDCO_8MHZ = 0xFF)while(1);/hang-up/* Function name: Config_IO* Descriptions: IO Port Configuration* input parameters: none* output parameters: none* Returned value: none*/void Config_IO(void)/ set all IO port outputsP1DIR = 0xFF; / All P1.x outputsP1OUT = 0x00; / All P1.x resetP2DIR = 0xFF; / All P2.x outputsP2OUT = 0x00; / All P2.x reset/* Function name: System_Init* Descriptions: WatchDog Timer Configuration* input parameters: none* output parameters: none* Returned value: none*/void System_Init(void)Config_WDT();Config_Clock();Config_IO();_delay_cycles(800000);_delay_cycles(800000);#ifndef SYSTEM_H_#define SYSTEM_H_/*Extern Function Declaration*/extern void System_Init(void);#endif /* SYSTEM_H_ */*/#include #include #include uart.h/* Function name: UartInit* Descriptions: Serial port initialization* input parameters: none* output parameters: none* Returned value: none*/void UartInit(void)P1SEL = BIT1 + BIT2 ; / P1.1 = RXD, P1.2=TXDP1SEL2 = BIT1 + BIT2 ; / P1.1 = RXD, P1.2=TXDUCA0CTL1 |= UCSSEL_1; / CLK = ACLKUCA0BR0 = 0x03; / 32kHz/9600 = 3.41UCA0BR1 = 0x00; /UCA0MCTL = UCBRS1 + UCBRS0; / Modulation UCBRSx = 3UCA0CTL1 &= UCSWRST; / *Initialize USCI state machine*IE2 |= UCA0RXIE; / Enable USCI_A0 RX interrupt/* Function name: Uart_SendHexInt* Descriptions: Serial port send data by interrupt* input parameters: _data:data* output parameters: none* Returned value: none*/void Uart_SendHexInt(unsigned char _data)IE2 |= UCA0TXIE;/ enable USCI_A0 TX interruptUCA0TXBUF = _data;/* Function name: Uart_SendStr* Descriptions: Serial port send string* input parameters: *pBuffer:the buffer will be transmitted* output parameters: none* Returned value: none*/void Uart_SendStr(char *pBuffer)unsigned int q0;unsigned int n_Byte;n_Byte = strlen(pBuffer);for(q0 = 0;q0n_Byte;q0+)while(IFG2&UCA0TXIFG)=0);UCA0TXBUF = *pBuffer;pBuffer+;/*Interrupt Response Function*/* Function name: USCI0TX_ISR* Descriptions: Serial port transmit interrupt function* input parameters: none* output parameters: none* Returned value: none*/#pragma vector = USCIAB0TX_VECTOR_interrupt void USCI0TX_ISR(void)while(IFG2&UCA0TXIFG)=0);IE2 &= UCA0TXIE;/ close USCI_A0 TX interrupt/* Function name: USCI0RX_ISR* Descriptions: Serial port receive interrupt function* input parameters: none* output parameters: none* Returned value: none*/#pragma vector = USCIAB0RX_VECTOR_interrupt void USCI0RX_ISR(void)unsigned char RcvBuf = 0;RcvBuf = UCA0RXBUF;Uart_SendHexInt(RcvBuf);#ifndef UART_H_#define UART_H_/*Extern Function Declaration*/extern void UartInit(void);extern void Uart_SendHexInt(unsigned char);extern void Uart_SendStr(char*);#endif /* USART_H_ */*Function Declaration*/#defineDS18B20_Delay(us)_delay_cycles(8*us)voidDS18B20_WriteByte(unsigned char);unsigned charDS18B20_ReadByte(void);voidDS18B20_ReadBytes(unsigned char, unsigned char*);voidDS18B20_ReadID (unsigned char *id);voidDS18B20_Config(void);unsigned intDS18B20_ReadTemp(void);unsigned charDS18B20_CRC(unsigned char, unsigned char*);unsigned char CrcTable 256=0, 94, 188, 226, 97, 63, 221, 131, 194, 156, 126, 32, 163, 253, 31, 65,157, 195, 33, 127, 252, 162, 64, 30, 95, 1, 227, 189, 62, 96, 130, 220,35, 125, 159, 193, 66, 28, 254, 160, 225, 191, 93, 3, 128, 222, 60, 98,190, 224, 2, 92, 223, 129, 99, 61, 124, 34, 192, 158, 29, 67, 161, 255,70, 24, 250, 164, 39, 121, 155, 197, 132, 218, 56, 102, 229, 187, 89, 7,219, 133, 103, 57, 186, 228, 6, 88, 25, 71, 165, 251, 120, 38, 196, 154,101, 59, 217, 135, 4, 90, 184, 230, 167, 249, 27, 69, 198, 152, 122, 36,248, 166, 68, 26, 153, 199, 37, 123, 58, 100, 134, 216, 91, 5, 231, 185,140, 210, 48, 110, 237, 179, 81, 15, 78, 16, 242, 172, 47, 113, 147, 205,17, 79, 173, 243, 112, 46, 204, 146, 211, 141, 111, 49, 178, 236, 14, 80,175, 241, 19, 77, 206, 144, 114, 44, 109, 51, 209, 143, 12, 82, 176, 238,50, 108, 142, 208, 83, 13, 239, 177, 240, 174, 76, 18, 145, 207, 45, 115,202, 148, 118, 40, 171, 245, 23, 73, 8, 86, 180, 234, 105, 55, 213, 139,87, 9, 235, 181, 54, 104, 138, 212, 149, 203, 41, 119, 244, 170, 72, 22,233, 183, 85, 11, 136, 214, 52, 106, 43, 117, 151, 201, 74, 20, 246, 168,116, 42, 200, 150, 21, 75, 169, 247, 182, 232, 10, 84, 215, 137, 107, 53;unsigned char DS18B20_IDBuff8;/* Function name: DS18B20_Init* Descriptions:Initial DS18B20* input parameters: none* output parameters: none* Returned value: 0:detect ds18b20 fail!1:detect ds18b20 success!*/unsigned char DS18B20_Init(void)unsigned char return_val = 0;DS18B20_WRITE;DS18B20_Delay(5);DS18B20_DQ_CLR;DS18B20_Delay(500);DS18B20_DQ_SET;DS18B20_Delay(20);DS18B20_READ;DS18B20_Delay(5);if(DS18B20_DQ_IS_LOW)return_val = 1;/detect 1820 success!elsereturn_val = 0;/detect 1820 fail!DS18B20_Delay(100);DS18B20_WRITE;DS18B20_Delay(5);DS18B20_DQ_SET;return return_val;/* Function name: DS18B20_WriteByte* Descriptions:DS18B20 send one byte* input parameters: dat:byte* output parameters: none* Returned value: none*/void DS18B20_WriteByte(unsigned char dat)unsigned char i;DS18B20_WRITE;DS18B20_Delay(5);for (i=0;i= 1;DS18B20_Delay(1);/* Function name: DS18B20_ReadByte* Descriptions:DS18B20 read one byte* input parameters: none* output parameters: none* Returned value: read byte*/unsigned char DS18B20_ReadByte(void)unsigned char i,dat=0;for(i=0;i= 1;DS18B20_DQ_SET;DS18B20_READ;DS18B20_Delay(12);if(DS18B20_DQ_IS_HIGH)dat |= 0x80;DS18B20_Delay(5);return dat;/* Function name: DS18B20_ReadBytes* Descriptions:DS18B20 read bytes* input parameters: len:number of bytes* output parameters:*p:read buffer* Returned value: none*/void DS18B20_ReadBytes(unsigned char len, unsigned char *p) unsigned char i; for(i=0;ilen;i+) *p = DS18B20_ReadByte(); p+; /* Function name: DS18B20_ReadID* Descriptions:DS18B20 read ID* input parameters:none* output parameters:*id:ds18b20 ID* Returned value: none*/void DS18B20_ReadID(unsigned char *id)DS18B20_Init();DS18B20_WriteByte(0x33); /read ROMDS18B20_ReadBytes(8,id);/* Function name: DS18B20_Config* Descriptions:DS18B20 internal config* input parameters:none* output parameters:none* Returned value: none*/void DS18B20_Config(void)DS18B20_Init();DS18B20_WriteByte(0xcc);/skip ROMDS18B20_WriteByte(0x4e);/write scratchpadDS18B20_WriteByte(0x19);/upper limitDS18B20_WriteByte(0x1a);/lower limitDS18B20_WriteByte(0x7f);/set 11 bit (0.125)DS18B20_Init();DS18B20_WriteByte(0xcc);/skip ROMDS18B20_WriteByte(0x48);/save set valueDS18B20_Init();DS18B20_WriteByte(0xcc);/skip ROMDS18B20_WriteByte(0xb8);/call-back set value/* Function name: DS18B20_GetTemp* Descriptions:DS18B20 get temperature* input parameters:none* output parameters:none* Returned value: temperature*/unsigned int DS18B20_GetTemp(void) DS18B20_ReadID(DS18B20_IDBuff); DS18B20_Config(); DS18B20_Init (); DS18B20_WriteByte(0xcc); /skip rom DS18B20_WriteByte(0x44); /Temperature convert DS18B20_Init ();DS18B20_WriteByte(0xcc); /skip romDS18B20_WriteByte(0xbe); /read Temperaturereturn DS18B20_ReadTemp();/* Function name: DS18B20_ReadTemp* Descriptions:read temperature from ds18b20* input parameters:none* output parameters:none* Returned value: temperature buffer*/unsigned int DS18B20_ReadTemp(void)unsigned int Temperature;unsigned char temp_buff9;DS18B20_ReadBytes(9,temp_buff);if (DS18B20_CRC(9,temp_buff)=0)/CRC verif