added ADC driver

1brahimmohamed · Oct 8, 2022 · 8789dde · 8789dde
1 parent 871995b
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diff --git a/ADC/.cproject b/ADC/.cproject
@@ -0,0 +1,115 @@
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diff --git a/ADC/.project b/ADC/.project
@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>ADC</name>
+	<comment></comment>
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+	</projects>
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+</projectDescription>
diff --git a/ADC/.settings/de.innot.avreclipse.core.prefs b/ADC/.settings/de.innot.avreclipse.core.prefs
@@ -0,0 +1,7 @@
+avrtarget/ClockFrequency=16000000
+avrtarget/ExtRAMSize=0
+avrtarget/ExtendedRAM=false
+avrtarget/MCUType=atmega32
+avrtarget/UseEEPROM=false
+avrtarget/UseExtendedRAMforHeap=true
+eclipse.preferences.version=1
diff --git a/ADC/.settings/org.eclipse.core.resources.prefs b/ADC/.settings/org.eclipse.core.resources.prefs
@@ -0,0 +1,2 @@
+eclipse.preferences.version=1
+encoding/<project>=UTF-8
diff --git a/ADC/src/adc.c b/ADC/src/adc.c
@@ -0,0 +1,78 @@
+ /******************************************************************************
+ *
+ * Module: Analog to Digital Converter
+ * File Name: adc.h
+ * Description: source file for the ADC driver
+ * Author: Ibrahim Mohamed
+ *
+ *******************************************************************************/
+
+#include <avr/io.h>
+#include "adc.h"
+#include "common_macros.h"
+#include "gpio.h"
+
+
+/*******************************************************************************
+ *                      Functions Definitions                                  *
+ *******************************************************************************/
+
+
+
+/*
+ * Description :
+ * Initialize the ADC:
+ */
+void ADC_init(const ADC_ConfigType * Config_Ptr){
+
+	/* ADMUX Register Bits Description:
+	 * REFS1:0 = 00 to choose to connect external reference, internal reference or AVCC
+	 * ADLAR   = 0 right adjusted
+	 * MUX4:0  = 00000 to choose channel 0 as initialization
+	 */
+
+	ADMUX = 0;
+
+	/*
+	* insert the required voltage value in the last 2 bits bits (REFS0 and REFS1)
+	* of ADMUX Register
+	*/
+	ADMUX = (ADMUX & 0x3F) | (Config_Ptr->ref_volt);
+
+
+	/* ADCSRA Register Bits Description:
+	* ADEN    = 1 Enable ADC
+	* ADIE    = 0 Disable ADC Interrupt
+	* ADATE   = 0 Disable Auto Trigger
+	* ADPS2:0 = XXX to choose ADC_Clock (F_CPU/X where X is 2,4,8,16,32 or 64) --> ADC must operate in range 50-200Khz
+	*/
+
+	ADCSRA = (1<<ADEN) | (1<<ADPS1);
+	ADCSRA = (ADCSRA & 0xF4) | (Config_Ptr->prescaler);
+
+}
+
+
+
+/*
+ * Description :
+ * reads the channel from the ADC:
+ */
+uint16 ADC_readChannel(uint8 ch_num){
+
+	ch_num &= 0x07;	/* Input channel number must be from 0 --> 7 */
+	ADMUX &= 0X0E;	/* Clear first 5 bits in the ADMUX (channel number MUX4:0 bits) before set the required channel */
+	ADMUX = ADMUX | ch_num; /* Choose the correct channel by setting the channel number in MUX4:0 bits */
+
+	/*	 start conversion	*/
+	SET_BIT(ADCSRA,ADSC);
+
+	/*	 Polling	*/
+	while(BIT_IS_CLEAR(ADCSRA,ADIF)); 	/* Wait for conversion to complete, ADIF becomes '1' */
+
+	/*	clear the flag	*/
+	SET_BIT(ADCSRA,ADIF);
+
+
+	return ADC;	/*	return the value of ADC register that holds the converted value	*/
+}
diff --git a/ADC/src/adc.h b/ADC/src/adc.h
@@ -0,0 +1,64 @@
+ /******************************************************************************
+ *
+ * Module: Analog to Digital Converter
+ * File Name: adc.h
+ * Description: header file for the ADC driver
+ * Author: Ibrahim Mohamed
+ *
+ *******************************************************************************/
+
+
+#ifndef SRC_ADC_H_
+#define SRC_ADC_H_
+
+#include "std_types.h"
+
+
+
+/*******************************************************************************
+ *                         Types Declaration                                   *
+ *******************************************************************************/
+
+typedef enum{
+	AREF_OFF = 0,
+	AVCC = 1,
+	INTERNAL_VOLTAGE = 4
+} ADC_ReferenceVolatge;
+
+
+typedef enum{
+	F_CPU_2 = 0,
+	F_CPU_2 = 1,
+	F_CPU_4, F_CPU_8, F_CPU_16, F_CPU_32, F_CPU_64, F_CPU_128
+} ADC_Prescaler;
+
+
+typedef struct{
+	ADC_ReferenceVolatge ref_volt;
+	ADC_Prescaler prescaler;
+} ADC_ConfigType;
+
+
+/*******************************************************************************
+ *                             Functions Prototypes                            *
+ *******************************************************************************/
+
+
+
+
+/*
+ * Description :
+ * Initialize the ADC:
+ */
+void ADC_init(const ADC_ConfigType * Config_Ptr);
+
+
+
+/*
+ * Description :
+ * reads the channel from the ADC:
+ */
+uint16 ADC_readChannel(uint8 ch_num);
+
+
+#endif /* SRC_ADC_H_ */
diff --git a/ADC/src/common_macros.h b/ADC/src/common_macros.h
@@ -0,0 +1,34 @@
+ /******************************************************************************
+ *
+ * Module: Common - Macros
+ * File Name: Common_Macros.h
+ * Description: Commonly used Macros
+ * Author: Ibrahim Mohamed
+ *
+ *******************************************************************************/
+
+#ifndef COMMON_MACROS
+#define COMMON_MACROS
+
+/* Set a certain bit in any register */
+#define SET_BIT(REG,BIT) (REG|=(1<<BIT))
+
+/* Clear a certain bit in any register */
+#define CLEAR_BIT(REG,BIT) (REG&=(~(1<<BIT)))
+
+/* Toggle a certain bit in any register */
+#define TOGGLE_BIT(REG,BIT) (REG^=(1<<BIT))
+
+/* Rotate right the register value with specific number of rotates */
+#define ROR(REG,num) ( REG= (REG>>num) | (REG<<(8-num)) )
+
+/* Rotate left the register value with specific number of rotates */
+#define ROL(REG,num) ( REG= (REG<<num) | (REG>>(8-num)) )
+
+/* Check if a specific bit is set in any register and return true if yes */
+#define BIT_IS_SET(REG,BIT) ( REG & (1<<BIT) )
+
+/* Check if a specific bit is cleared in any register and return true if yes */
+#define BIT_IS_CLEAR(REG,BIT) ( !(REG & (1<<BIT)) )
+
+#endif
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		@@ -0,0 +1,2 @@
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