壹圓下面那個
example：
#include "stm32f10x.h"
#include "stdio.h"
#define HDC1000_ADDR 0x40 << 1
#define HDC1000_BOTH_TEMP_HUMI 0x10
#define HDC1000_TEMP_HUMI_14BIT 0x00
#define HDC1000_HEAT_ON 0x20
#define HDC1000_TEMP 0X00
#define HDC1000_HUMI 0X01
#define HDC1000_CONFIG 0x02
#define true 1
#define false 0
uint8_t HDC1000_SYNC = true;
uint8_t HDC1000_FLAG = HDC1000_TEMP;
double temperature = 0,humidity = 0;
volatile uint32_t delay = 0;
void Delay(volatile uint32_t n)
{
delay = n;
while(delay != 0);
}
void Init_I2C() {
I2C_InitTypeDef I2C_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
I2C_Cmd(I2C1,ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C1, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD;
GPIO_Init(GPIOB, &GPIO_InitStructure);
I2C_InitStructure.I2C_Mode = I2C_Mode_SMBusHost;
I2C_InitStructure.I2C_DutyCycle = I2C_DutyCycle_2;
I2C_InitStructure.I2C_OwnAddress1 = 0x00;
I2C_InitStructure.I2C_Ack = I2C_Ack_Enable;
I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
I2C_InitStructure.I2C_ClockSpeed = 100000 ;
I2C_Init(I2C1, &I2C_InitStructure);
}
void I2C_start(I2C_TypeDef* I2Cx, uint8_t address, uint8_t direction){
while(I2C_GetFlagStatus(I2Cx, I2C_FLAG_BUSY));
I2C_GenerateSTART(I2Cx, ENABLE);
while(!I2C_CheckEvent(I2Cx, I2C_EVENT_MASTER_MODE_SELECT));
I2C_Send7bitAddress(I2Cx, address, direction);
if(direction == I2C_Direction_Transmitter){
while(!I2C_CheckEvent(I2Cx, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));
} else if(direction == I2C_Direction_Receiver){
while(!I2C_CheckEvent(I2Cx, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED));
}
}
void I2C_write(I2C_TypeDef* I2Cx, uint8_t data)
{
I2C_SendData(I2Cx, data);
while(!I2C_CheckEvent(I2Cx, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
}
uint8_t I2C_read_ack(I2C_TypeDef* I2Cx){
uint8_t data;
I2C_AcknowledgeConfig(I2Cx, ENABLE);
while( !I2C_CheckEvent(I2Cx, I2C_EVENT_MASTER_BYTE_RECEIVED) );
data = I2C_ReceiveData(I2Cx);
return data;
}
uint8_t I2C_read_nack(I2C_TypeDef* I2Cx){
uint8_t data;
I2C_AcknowledgeConfig(I2Cx, DISABLE);
I2C_GenerateSTOP(I2Cx, ENABLE);
while( !I2C_CheckEvent(I2Cx, I2C_EVENT_MASTER_BYTE_RECEIVED) );
data = I2C_ReceiveData(I2Cx);
return data;
}
void I2C_stop(I2C_TypeDef* I2Cx){
I2C_GenerateSTOP(I2Cx, ENABLE);
}
void Init_BT(void){
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
NVIC_InitTypeDef interrup;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOA, &GPIO_InitStructure);
USART_InitStructure.USART_BaudRate = 9600;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_Parity = USART_Parity_No;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
USART_Init(USART2, &USART_InitStructure);
USART_Cmd(USART2, ENABLE);
}
void BT_Send_String(volatile char *string)
{
while(*string){
USART_SendData(USART2,*string);
++string;
while(USART_GetFlagStatus(USART2,USART_FLAG_TC) == RESET){}
}
}
void HDC1000Start()
{
uint8_t config = HDC1000_BOTH_TEMP_HUMI | HDC1000_TEMP_HUMI_14BIT | HDC1000_HEAT_ON;
I2C_start(I2C1, HDC1000_ADDR, I2C_Direction_Transmitter);
I2C_write(I2C1, HDC1000_CONFIG);
I2C_write(I2C1, config);
I2C_write(I2C1, 0x00);
I2C_stop(I2C1);
Delay(20);
}
void HDC1000DataRequest(uint8_t reg)
{
if((HDC1000_FLAG == reg) && HDC1000_SYNC){
HDC1000_SYNC = false;
I2C_start(I2C1, HDC1000_ADDR, I2C_Direction_Transmitter);
I2C_write(I2C1, reg);
I2C_stop(I2C1);
}
else if((HDC1000_FLAG == reg) && HDC1000_SYNC){
HDC1000_SYNC = false;
I2C_start(I2C1, HDC1000_ADDR, I2C_Direction_Transmitter);
I2C_write(I2C1, reg);
I2C_stop(I2C1);
}
}
double HDC1000GetTemp()
{
double temp = 0;
I2C_start(I2C1, HDC1000_ADDR, I2C_Direction_Receiver);
temp = I2C_read_ack(I2C1) << 8;
temp += I2C_read_nack(I2C1);
return temp / 65536.0 * 165.0 - 40.0;
}
double HDC1000GetHumi()
{
double humi = 0;
I2C_start(I2C1, HDC1000_ADDR, I2C_Direction_Receiver);
humi = I2C_read_ack(I2C1) << 8;
humi += I2C_read_nack(I2C1);
return humi / 65536.0 * 100.0;
}
void HDC1000EXTI15()
{
GPIO_InitTypeDef GPIO_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
EXTI_InitTypeDef EXTI_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB | RCC_APB2Periph_AFIO, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_15;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);
GPIO_EXTILineConfig(GPIO_PortSourceGPIOB, GPIO_PinSource15);
EXTI_InitStructure.EXTI_Line = EXTI_Line15;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);
NVIC_InitStructure.NVIC_IRQChannel = EXTI15_10_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
int main(){
Init_I2C();
Init_BT();
SystemInit();
if(SysTick_Config(SystemCoreClock / 1000)){
while(1);
}
HDC1000Start();
HDC1000EXTI15();
while(true){
if(HDC1000_FLAG == HDC1000_TEMP){
HDC1000DataRequest(HDC1000_TEMP);
}
else if(HDC1000_FLAG == HDC1000_HUMI){
HDC1000DataRequest(HDC1000_HUMI);
}
}
}
void SysTick_Handler(void)
{
if(delay != 0){
delay--;
}
}
void EXTI15_10_IRQHandler(void) {
if(EXTI_GetITStatus(EXTI_Line15) != RESET) {
if(HDC1000_FLAG == HDC1000_TEMP){
HDC1000_FLAG = HDC1000_HUMI;
temperature = HDC1000GetTemp();
}
else if(HDC1000_FLAG == HDC1000_HUMI){
HDC1000_FLAG = HDC1000_TEMP;
humidity = HDC1000GetHumi();
}
char str[256];
sprintf(str, "temperature:%.2f humidity:%.2f%%\n",temperature,humidity);
BT_Send_String(str);
HDC1000_SYNC = true;
}
EXTI_ClearITPendingBit(EXTI_Line15);
}
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