| 54,29 → 54,42 |
|---|
| // + ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| // + POSSIBILITY OF SUCH DAMAGE. |
| // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| //#include <stdlib.h> |
| #include "analog.h" |
| |
| #include "main.h" |
| |
| //############################################################################ |
| //Init ADC |
| void ADC_Init(void) |
| { |
| ADMUX = 0; |
| ADCSRA = 0x87; |
| ADMUX = 0; |
| ADCSRA |= 0x40; // Start Conversion |
| // set PortC 0,1,2,3 as input |
| DDRC &= ~((1<<DDC3)|(1<<DDC2)|(1<<DDC1)|(1<<DDC0)); |
| // set PortC 0,1,2,3 and 6,7 as tri state |
| PORTC &= ~((1<<PORTC3)|(1<<PORTC2)|(1<<PORTC1)|(1<<PORTC0)); |
| |
| // port PD5 and PD6 control the current direction of the test coils of the sensors |
| DDRD |= ((1<<DDD5)|(1<<DDD6)); |
| FLIP_LOW; |
| |
| // disable internal reference voltage and right adjust bits in ADCW |
| ADMUX = 0x00; |
| // clear start conversion bit (ADSC = 0) |
| // disable ADC Auto Trigger Enable (ADATE = 0) |
| // disable interrupt (ADIE = 0) |
| ADCSRA &= ~((1<<ADSC)|(1<<ADATE)|(1<<ADIE)); |
| // Enable ADC (ADEN = 1) with SYSCLK/128 (ADPS2 = 1, ADPS1 = 1, ADPS0 = 1) and clear ready flag (ADIF = 1) |
| ADCSRA |= ((1<<ADEN)|(1<<ADIF)|(1<<ADPS2)|(1<<ADPS1)|(1<<ADPS0)); |
| ADMUX = 0x00; // select ADC0 |
| ADCSRA |= (1<<ADSC); // start conversion |
| } |
| |
| |
| unsigned int MessAD(unsigned char channel) |
| uint16_t ADC_GetValue(ADChannel_t channel) |
| { |
| unsigned int messwert = 0; |
| ADMUX = channel; |
| ADCSRA |= 0x10; // Clear Ready-Bit |
| ADCSRA |= 0x40; // Start Conversion |
| while (((ADCSRA & 0x10) == 0)); |
| messwert = ADCW; |
| return(messwert); |
| uint16_t value = 0; |
| ADMUX = channel; // set muxer bits |
| ADCSRA |= (1<<ADIF); // clear ready-flag |
| ADCSRA |= (1<<ADSC); // start conversion |
| while (((ADCSRA & (1<<ADIF)) == 0)); // wait for end of conversion |
| value = ADCW; // read adc result |
| return(value); |
| } |
| |
| |