| 1,19 → 1,109 |
|---|
| #include <16F887.h> |
| #device adc=8 |
| #include "main.h" |
| |
| #FUSES NOWDT //No Watch Dog Timer |
| #FUSES INTRC //Internal RC Osc |
| #FUSES NOPUT //No Power Up Timer |
| #FUSES MCLR //Master Clear pin enabled |
| #FUSES NOPROTECT //Code not protected from reading |
| #FUSES NOCPD //No EE protection |
| #FUSES NOBROWNOUT //No brownout reset |
| #FUSES IESO //Internal External Switch Over mode enabled |
| #FUSES FCMEN //Fail-safe clock monitor enabled |
| #FUSES NOLVP //No low voltage prgming, B3(PIC16) or B5(PIC18) used for I/O |
| #FUSES NODEBUG //No Debug mode for ICD |
| #FUSES NOWRT //Program memory not write protected |
| #FUSES BORV40 //Brownout reset at 4.0V |
| void SHT25_soft_reset() |
| { |
| i2c_start(); // Start condition |
| i2c_write(0x80); // Device address |
| i2c_write(0xFE); // Device command |
| i2c_stop(); // Stop condition |
| } |
| |
| #use delay(clock=8000000) |
| unsigned int8 SHT25_setup() |
| { |
| unsigned int8 reg; |
| |
| i2c_start(); // Start condition |
| i2c_write(0x80); // Device address |
| i2c_write(0xE7); // Device command |
| // i2c_stop(); // Stop condition |
| |
| i2c_start(); // Start condition |
| i2c_write(0x81); // Device address |
| reg=i2c_read(0); // Device command |
| i2c_stop(); // Stop condition |
| |
| return (reg); |
| } |
| |
| float SHT25_get_temp() |
| { |
| unsigned int8 MSB, LSB, Check; |
| unsigned int16 data; |
| |
| i2c_start(); |
| I2C_Write(0x80); |
| I2C_write(0xE3); |
| i2c_stop(); |
| |
| delay_ms(100); |
| |
| i2c_start(); |
| I2C_Write(0x81); |
| MSB=i2c_read(1); |
| LSB=i2c_read(1); |
| Check=i2c_read(0); |
| i2c_stop(); |
| |
| printf("%X %X %X\r\n",MSB, LSB, Check); |
| |
| LSB = LSB >> 2; // trow out status bits |
| |
| data = (((unsigned int16) MSB << 8) + (LSB << 4)); |
| return(-46.85 + 175.72*((float)data/0xFFFF)); |
| } |
| |
| float SHT25_get_hum() |
| { |
| unsigned int8 MSB, LSB, Check; |
| unsigned int16 data; |
| |
| i2c_start(); //RH |
| I2C_Write(0x80); |
| I2C_write(0xE5); |
| // i2c_stop(); |
| |
| delay_ms(100); |
| |
| i2c_start(); |
| I2C_Write(0x81); |
| MSB=i2c_read(1); |
| LSB=i2c_read(1); |
| Check=i2c_read(0); |
| i2c_stop(); |
| |
| printf("%X %X %X\r\n",MSB, LSB, Check); |
| |
| LSB = LSB >> 2; // trow out status bits |
| |
| data = (((unsigned int16) MSB << 8) + (LSB << 4) ); |
| return( -6.0 + 125.0*((float)data/0xFFFF)); |
| } |
| |
| |
| void main() |
| { |
| |
| setup_adc_ports(NO_ANALOGS|VSS_VDD); |
| setup_adc(ADC_CLOCK_DIV_2); |
| setup_spi(SPI_SS_DISABLED); |
| setup_timer_0(RTCC_INTERNAL|RTCC_DIV_1); |
| setup_timer_1(T1_DISABLED); |
| setup_timer_2(T2_DISABLED,0,1); |
| setup_ccp1(CCP_OFF); |
| setup_comparator(NC_NC_NC_NC); |
| |
| void SHT25_soft_reset(); |
| printf("SHT25 humidity and temperature sensor example \r\n",); |
| delay_ms (500); |
| |
| while(TRUE) |
| { |
| printf("setup: %X \r\n",SHT25_setup()); |
| delay_ms (500); |
| printf("Temp: %f \r\n",SHT25_get_temp()); |
| delay_ms (500); |
| printf("Hum: %f \r\n",SHT25_get_hum()); |
| delay_ms (1000); |
| } |
| } |
| |