DS18B20实验

只看该作者 · 2011-11-29 15:10

本帖最后由 ltbytyn 于 2012-1-7 10:26 编辑

#include "Smpl_Drv_DS1820.h"
volatile uint16_t value = 0 ;
volatile uint8_t mark;          //温度正负标志
volatile uint8_t IsStart = FALSE;
volatile uint8_t Receive_Data = 0;

void UART_INT_HANDLE(uint32_t u32IntStatus)
{
  uint8_t bInChar[1]={0xFF};
if(u32IntStatus & DRVUART_RDAINT)
{
  /* Get all the input characters */
  while(UART0->ISR.RDA_IF==1)
  {
/* Get the character from UART Buffer */
DrvUART_Read(UART_PORT0,bInChar,1);
if (IsStart!=TRUE)
{
IsStart = TRUE;
Receive_Data = bInChar[0];
}
  }
}
}

void Init_Uart(void)
{
STR_UART_T param;
/*
声明 UART设置的结构体位于DRVUART.H
结构体如下
typedef struct DRVUART_STRUCT
{
  uint32_t          u32BaudRate;
  E_DATABITS_SETTINS  u8cDataBits;
  E_STOPBITS_SETTINS  u8cStopBits;
  E_PARITY_SETTINS  u8cParity;
  E_FIFO_SETTINGS    u8cRxTriggerLevel;
  uint8_t          u8TimeOut ;
   }STR_UART_T;
*/
DrvSYS_SelectIPClockSource(E_SYS_UART_CLKSRC,0);    //使能UART时钟
//SYSCLK->CLKSEL1.UART_S = 0;  //UART时钟源选择. 00 =外部12MHz 晶振 01 = PLL 1x =内部 22MHz 振荡器
DrvGPIO_InitFunction(E_FUNC_UART0);       //GPB_MFP0-1-2-3置位 GPIO使能UART功能
//outpw(&SYS->GPBMFP, inpw(&SYS->GPBMFP) | (0xF<<0));
param.u32BaudRate       = 115200;    //  波特率
param.u8cDataBits       = DRVUART_DATABITS_8; //  数据位
param.u8cStopBits       = DRVUART_STOPBITS_1; //  停止位
param.u8cParity       = DRVUART_PARITY_NONE; //  校验位
param.u8cRxTriggerLevel  = DRVUART_FIFO_1BYTES; //  FIFO存储深度 1 字节
param.u8TimeOut       = 0;       //  FIFO超时设定
/* Set UART Configuration */
  if(DrvUART_Open(UART_PORT0,¶m) != E_SUCCESS) //  串口开启、结构体整体赋值
  printf("UART0 open failed\n");
/* u32Port -[in] UART Channel:  UART_PORT0 / UART_PORT1 /UART_PORT2 */
/* sParam  -[in] the struct parameter to configure UART */
/* Enable Interrupt and install the call back function */
DrvUART_EnableInt(UART_PORT0, DRVUART_RDAINT,UART_INT_HANDLE);
/*u32Port    -[in] UART Channel:  UART_PORT0 / UART_PORT1 / UART_PORT2                */
/*u32InterruptFlag -[in] DRVUART_LININT/DRVUART_WAKEUPINT/DRVUART_BUFERRINT/DRVUART_RLSINT    */
/*       DRVUART_MOSINT/DRVUART_THREINT/DRVUART_RDAINT/DRVUART_TOUTINT */
/*pfncallback    -[in] A function pointer for callback function                            */
}

int main (void)
{
  Set_System();
  Init_Uart();
printf("======温度实验=====\n");
while(1)
{
  value = read_temp();
printf("当前温度: %d.%d℃",value/10,value%10);
  delay_ms(2000);
}
}

有详细注释。

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