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Fixed indentation

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This commit is contained in:
David Lenfesty 2019-11-05 20:53:18 -07:00
parent 9f20dee3ab
commit e847304d23
2 changed files with 26 additions and 29 deletions
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46
lab_3/main.c
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@ -25,21 +25,21 @@ void pin_init() {
}
/** @brief Initializes ADC with required settings
*/
*/
void adc_init() {
/* ADC Settings
* Use AVcc as Vref
* Use 1v1 reference as Vref
* Initially set input as GND
* Data right-adjusted
* No Interrupts
*/
// Set Vref
ADMUX |= (1 << REFS1) | (1 << REFS0);
// Set Vref
ADMUX |= (1 << REFS1) | (1 << REFS0);
// Set the clock prescaler to 128 (slower ADC means more accurate measurements)
ADCSRA |= (1 << ADPS2) | (1 << ADPS1) | (1 << ADPS0);
// Enable ADC
ADCSRA |= (1 << ADEN);
// Enable ADC
ADCSRA |= (1 << ADEN);
}
/** @brief Blocking function to read an ADC conversion from a selected ADC input.
@ -83,16 +83,16 @@ int8_t lm35_convert(uint16_t adc_reading) {
* @return Measured temperature, configure parameters in main.h
*/
int8_t diode_convert(uint16_t adc_reading) {
int16_t value_diff = adc_reading - DIODE_VALUE_25C;
int16_t temp_diff = value_diff / DIODE_SENSITIVITY;
int16_t value_diff = adc_reading - DIODE_VALUE_25C;
int16_t temp_diff = value_diff / DIODE_SENSITIVITY;
return temp_diff + 25;
}
int main() {
// Initialise display
// NOTE: LCD uses PB0-PB6
lcd_init(LCD_DISP_ON);
// Initialise display
// NOTE: LCD uses PB0-PB6
lcd_init(LCD_DISP_ON);
// Initialise peripherals
pin_init();
adc_init();
@ -100,31 +100,31 @@ int main() {
while (1) {
// Reset position
lcd_gotoxy(0, 0);
// Reset position
lcd_gotoxy(0, 0);
// Read LM35 value, and write to LCD
uint16_t lm35_value = adc_run_conversion(1);
uint16_t lm35_value = adc_run_conversion(1);
int8_t lm35_temp = lm35_convert(lm35_value);
// Convert measured value to string
sprintf(lm35_string, "LM35 : %4d %3dC", lm35_value, lm35_temp);
// Display temp on LCD
lcd_puts((const char*) lm35_string);
lcd_gotoxy(0, 1);
lcd_gotoxy(0, 1);
// Read diode value, and write to
uint16_t diode_value = adc_run_conversion(0);
int8_t diode_temp = diode_convert(diode_value);
int8_t diode_temp = diode_convert(diode_value);
sprintf(diode_string, "Diode: %4d %3dC", diode_value, diode_temp);
// Display diode info on LCD
lcd_puts((const char*) diode_string);
// Refreshing too fast can make the data appear weird
_delay_ms(500);
_delay_ms(500);
}
}

9
lab_3/main.h
View File

@ -7,15 +7,12 @@
#include <stdio.h>
#include "lcd.h"
// Comment out to run in "normal" mode
#define CALIBRATION
#define ADC_VREF 1.1
#define ADC_RESOLUTION 1023 // (2^ 10 - 1, 10 bits resolution)
#define DIODE_VALUE_25C 436 // ADC value for diode at 0C
#define DIODE_SENSITIVITY -1.85 // ADC value / degree C, tuneable
#define DIODE_VALUE_25C 440 // ADC value for diode at 0C
#define DIODE_SENSITIVITY -1.66 // ADC value / degree C, tuneable
#define LM35_SENSITIVITY 0.01 // V / degree C, see LM35 datasheet
#endif
#endif