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| #include <stdint.h>
#include <stdbool.h>
#include "inc/hw_memmap.h"
#include "inc/hw_types.h"
#include "inc/hw_ints.h"
#include "inc/hw_memmap.h"
#include "inc/hw_pwm.h"
#include "inc/hw_timer.h"
#include "driverlib/debug.h"
#include "driverlib/timer.h"
#include "driverlib/fpu.h"
#include "driverlib/gpio.h"
#include "driverlib/pin_map.h"
#include "driverlib/rom.h"
#include "driverlib/rom_map.h"
#include "driverlib/sysctl.h"
#include "driverlib/uart.h"
#include "utils/uartstdio.h"
#include "driverlib/systick.h"
#include "driverlib/interrupt.h"
#include "driverlib/pwm.h"
#define delay(ms) ROM_SysCtlDelay(clock*ms/3000)
int clock;
void ConfigureUART();
bool odd=true;
int last_cap=0,cap_duration[1000];
bool date[110];
int gffg=0;
void Timer2AIntHandler(){
unsigned long ulstatus = TimerIntStatus(TIMER2_BASE, TIMER_CAPA_EVENT|TIMER_TIMA_TIMEOUT);
TimerIntClear(TIMER2_BASE, ulstatus);
odd=1-odd;
if(odd){
cap_duration[gffg++]=TimerValueGet(TIMER2_BASE, TIMER_A)-last_cap;
}
last_cap=TimerValueGet(TIMER2_BASE, TIMER_A);
return ;
}
void prt_f(float w){
if(w>0){
UARTprintf("%d.",(int)w);
}else{
UARTprintf("0.");
}
int tem=(int)(w*10000000)%1000000;
if(tem<1000000)UARTprintf("0");
if(tem<100000)UARTprintf("0");
if(tem<10000)UARTprintf("0");
if(tem<1000)UARTprintf("0");
if(tem<100)UARTprintf("0");
if(tem<10)UARTprintf("0");
if(tem<1)UARTprintf("0");
UARTprintf("%d",tem);
return ;
}
void ConfigureDHT11(){
gffg=0;
odd=true;
ROM_SysCtlDelay(clock*1500/3000);
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOF);
GPIOPinTypeGPIOOutput(GPIO_PORTF_BASE, GPIO_PIN_4);
GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_4, 0);
ROM_SysCtlDelay(240000);
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOF);
SysCtlPeripheralEnable(SYSCTL_PERIPH_TIMER2);
GPIOPinConfigure(GPIO_PF4_T2CCP0);
GPIOPinTypeTimer(GPIO_PORTF_BASE, GPIO_PIN_4);
GPIOPadConfigSet(GPIO_PORTF_BASE, GPIO_PIN_4, GPIO_STRENGTH_2MA, GPIO_PIN_TYPE_STD_WPU);
TimerPrescaleSet(TIMER2_BASE, TIMER_A, 255);
TimerConfigure(TIMER2_BASE, TIMER_CFG_SPLIT_PAIR | TIMER_CFG_A_CAP_TIME_UP);
TimerControlEvent(TIMER2_BASE, TIMER_A, TIMER_EVENT_BOTH_EDGES);
TimerLoadSet(TIMER2_BASE, TIMER_A, 65535);
TimerIntRegister(TIMER2_BASE, TIMER_A, Timer2AIntHandler);
IntMasterEnable();
TimerIntEnable(TIMER2_BASE, TIMER_CAPA_EVENT|TIMER_TIMA_TIMEOUT);
IntEnable(INT_TIMER2A);
TimerEnable(TIMER2_BASE,TIMER_A);
int i=0;
delay(1500);
for(i=0;i<gffg;i++){
if(cap_duration[i]<=0) cap_duration[i]+=255*65536;
date[i]=(cap_duration[i]>2000)?1:0;
}
float hum=0,temp=0,cnt=128;
for(i=1;i<=16;i++){
if(date[i+1])hum+=cnt;
if(date[i+1+16])temp+=cnt;
cnt/=2;
}
if(hum<200){
prt_f(hum);
UARTprintf("\n");
prt_f(temp);
UARTprintf("\n finish!\n");
}
return ;
}
bool detection_queue[110];
int detection_index=0;
bool state=false;
long long duration[110];
int message_index=0;
long long tick=0;
int threshold=12;
void WTimer1AIntHandler(){
unsigned long ulstatus = TimerIntStatus(WTIMER1_BASE,TIMER_TIMA_TIMEOUT);
TimerIntClear(WTIMER1_BASE, ulstatus);
int ReadPin1 = GPIOPinRead(GPIO_PORTF_BASE, GPIO_PIN_4);
int flag=((ReadPin1&GPIO_PIN_4) != GPIO_PIN_4);
detection_queue[detection_index]=flag;
int i=0,sum=0;
for(i=0;i<=threshold;i++)sum+=(int)detection_queue[detection_index-i];
if(tick>threshold){
if(sum==threshold&&state==false){
state=true;
duration[message_index]=tick;
}
if(sum==0&&state==true){
state=false;
duration[message_index]=tick-duration[message_index];
UARTprintf("bottom up. message index is %d\nduration:%d\n",message_index,duration[message_index]);
message_index++;
message_index%=110;
}
}
tick++;
detection_index++;
detection_index%=110;
return ;
}
void Configurebottom(){
ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOF);
GPIODirModeSet(GPIO_PORTF_BASE, GPIO_PIN_4, GPIO_DIR_MODE_IN);
GPIOPadConfigSet(GPIO_PORTF_BASE, GPIO_PIN_4, GPIO_STRENGTH_2MA, GPIO_PIN_TYPE_STD_WPU);
SysCtlPeripheralEnable(SYSCTL_PERIPH_WTIMER1);
TimerConfigure(WTIMER1_BASE,TIMER_CFG_PERIODIC);
TimerLoadSet64(WTIMER1_BASE, clock/500);
TimerIntRegister(WTIMER1_BASE, TIMER_A, WTimer1AIntHandler);
IntMasterEnable();
TimerIntEnable(WTIMER1_BASE, TIMER_TIMA_TIMEOUT);
IntEnable(INT_WTIMER1A);
TimerEnable(WTIMER1_BASE, TIMER_A);
}
void ConfigureEverything(){
FPUEnable();
FPULazyStackingEnable();
SysCtlClockSet(SYSCTL_SYSDIV_4 | SYSCTL_USE_PLL | SYSCTL_XTAL_16MHZ | SYSCTL_OSC_MAIN);
clock=SysCtlClockGet();
ConfigureUART();
for(;;){
ConfigureDHT11();
}
}
int main(){
ConfigureEverything();
UARTprintf("configuration finish.\n");
for(;;);
}
void ConfigureUART(){
ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOA);
ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_UART0);
ROM_GPIOPinConfigure(GPIO_PA0_U0RX);
ROM_GPIOPinConfigure(GPIO_PA1_U0TX);
ROM_GPIOPinTypeUART(GPIO_PORTA_BASE, GPIO_PIN_0 | GPIO_PIN_1);
UARTClockSourceSet(UART0_BASE, UART_CLOCK_PIOSC);
UARTStdioConfig(0, 115200, 16000000);
}
|
