Added DicoveryF4

Added DicoveryF4

Discovery-F4/contents/module10/Code/SerialDemoI2C/RTE/RTE_Components.h

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+
+/*
+ * Auto generated Run-Time-Environment Component Configuration File
+ *      *** Do not modify ! ***
+ *
+ * Project: 'Test' 
+ * Target:  'Target 1' 
+ */
+
+#ifndef RTE_COMPONENTS_H
+#define RTE_COMPONENTS_H
+
+#define RTE_DEVICE_STARTUP_STM32F4xx    /* Device Startup for STM32F4 */
+
+#endif /* RTE_COMPONENTS_H */

Discovery-F4/contents/module10/Code/SerialDemoI2C/drivers/adc.c

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+#include <platform.h>
+#include <adc.h>
+
+void adc_init(void) {
+
+	//Enable the clock for ADC module and GPIO Port A
+	RCC->AHB1ENR|=RCC_AHB1ENR_GPIOAEN;
+	RCC->APB2ENR|=RCC_APB2ENR_ADC1EN;
+
+	//Configure the Port A pin 1 to be the Analogue Mode
+	GPIOA->MODER|=GPIO_MODER_MODER1;
+	GPIOA->PUPDR&=~(GPIO_PUPDR_PUPDR1);
+
+	//Set the prescaler for the clock
+	RCC->CFGR|=RCC_CFGR_PPRE2_DIV2;
+
+	//Set ADC prescaler, divided by 2
+	ADC->CCR|=ADC_CCR_ADCPRE_0;
+
+	//Power up the ADC module
+	ADC1->CR2|=ADC_CR2_ADON;
+
+	//480	cycles, better accuracy than 3 cycles
+	ADC1->SMPR2|=ADC_SMPR2_SMP1;
+
+	//Select channel 1 as input 
+	MODIFY_REG(ADC1->SQR3, ADC_SQR3_SQ1, ADC_SQR3_SQ1_0); 
+
+}
+
+int adc_read(void) {
+
+	//Software trigger the conversion
+	ADC1->CR2|=ADC_CR2_SWSTART;
+
+	//Wait for the completion of the conversion
+	while(!(ADC1->SR&(1UL<<1))){}
+
+	//Return the reading value	
+	return (ADC1->DR)*3;
+
+}
+
+// *******************************ARM University Program Copyright © ARM Ltd 2014*************************************   

Discovery-F4/contents/module10/Code/SerialDemoI2C/drivers/adc.h

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+/*!
+ * \file      adc.h
+ * \brief     Internal analogue to digital converter (ADC) controller.
+ * \copyright ARM University Program © ARM Ltd 2014.
+ */
+#ifndef ADC_H
+#define ADC_H
+
+/*! \brief Initializes the analogue to digital converter, and configures
+ *         the appropriate GPIO pin.
+ */
+void adc_init(void);
+
+/*! \brief Reads the current value of the ADC.
+ *  \return Potential of the pin, relative to ground.
+ */
+int adc_read(void);
+
+#endif // ADC_H

Discovery-F4/contents/module10/Code/SerialDemoI2C/drivers/comparator.c

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+#include <platform.h>
+#include <comparator.h>
+#include <stdlib.h>
+
+static void (*CMP_callback)(int status);
+
+//Note: the interrupt can be only triggered once!
+void comparator_init(void) {
+	// Initialise and enable the internal comparator, with
+	// two external inputs.
+
+	//Enable the clock for ADC module and GPIO Port A
+	RCC->AHB1ENR|=RCC_AHB1ENR_GPIOAEN;
+	RCC->APB2ENR|=RCC_APB2ENR_ADC2EN;
+
+	//Configure the Port A pin 2 to be the Analogue Mode
+	GPIOA->MODER|=GPIO_MODER_MODER2;
+	GPIOA->PUPDR&=~(GPIO_PUPDR_PUPDR2);
+
+	//Set the prescaler for the clock
+	RCC->CFGR|=RCC_CFGR_PPRE2_DIV2;
+
+	//Set ADC prescaler, divided by 2
+	ADC->CCR|=ADC_CCR_ADCPRE_0;
+
+	//Power up the ADC module, continous mode
+	ADC2->CR2|=ADC_CR2_ADON | ADC_CR2_CONT;
+
+	//480	cycles, better accuracy than 3 cycles
+	ADC2->SMPR2|=ADC_SMPR2_SMP2;
+
+	//Enable analog Watchdog Interrupt
+	//AWCD watching channel 2 
+	ADC2->CR1=ADC_CR1_AWDSGL|ADC_CR1_AWDEN|ADC_CR1_AWDCH_1;
+	ADC2->CR1 |= ADC_CR1_AWDIE;
+
+	//Set up the threshold
+	//These threshold values may differe from one board to anothr!
+	ADC2->LTR=(uint16_t)0x0000;
+
+	//HTR should be larger than LTR
+	ADC2->HTR=(uint16_t)0x0FFF/2;
+
+	//Select channel 2 as input 
+	MODIFY_REG(ADC2->SQR3, ADC_SQR3_SQ1, ADC_SQR3_SQ1_1);
+
+	ADC2->CR2|=ADC_CR2_SWSTART;
+
+}
+
+void comparator_set_callback(void (*callback)(int state)) {
+	// Set up and enable the interrupt.
+
+	// The callback function should be stored in an internal
+	// static function pointer.
+
+	// When the comparator ISR is fired, the callback function
+	// should be executed. The state parameter should equal
+	// comparator_read().
+
+	CMP_callback = callback;
+
+	//NVIC configuration
+	__enable_irq();
+	NVIC_SetPriority(ADC_IRQn,0);
+	NVIC_ClearPendingIRQ(ADC_IRQn);
+	NVIC_EnableIRQ(ADC_IRQn);
+}
+
+int comparator_read(void) {
+	// Read the value outputted by the comparator.
+	// Returns 1 for V+>V- and 0 for V+<V-.
+	uint32_t count = 0x1FFFF;
+	while(count--)
+	{
+			__NOP();
+	}
+
+	return (ADC2->SR&1);
+}
+
+void comparator_set_trigger(ComparatorTriggerMode trig) {
+	// Set the interrupt trigger type of the comparator to either
+	// disabled, rising edge, falling edge, or both edges.
+
+	ADC2->SR&=~(ADC_SR_AWD);
+}
+
+void ADC_IRQHandler(void){
+
+	int CMP_IRQ_status = (ADC2->SR&1);
+
+	NVIC_ClearPendingIRQ(ADC_IRQn);
+
+	if(CMP_callback == NULL){
+		if((ADC2->SR&1<<0)==1){	
+		  ADC2->SR&=~(ADC_SR_AWD);
+		}
+	}
+	else{
+	if((ADC2->SR&1<<0)==1){		
+		CMP_callback(comparator_read());
+		ADC2->SR&=~(ADC_SR_AWD);
+		NVIC_DisableIRQ(ADC_IRQn);
+	}
+}
+}

Discovery-F4/contents/module10/Code/SerialDemoI2C/drivers/comparator.h

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+/*!
+ * \file      comparator.h
+ * \brief     Exposes functions of an internal comparator.
+ * \copyright ARM University Program © ARM Ltd 2014.
+ */
+#ifndef COMPARATOR_H
+#define COMPARATOR_H
+/*! Defines the triggering mode of the comparator's interrupt. */
+typedef enum {
+	CompNone,    //!< Disables the interrupt.
+	CompRising,  //!< Enables an interrupt on the falling edge.
+	CompFalling, //!< Enables an interrupt on the rising edge.
+	CompBoth     //!< Enables an interrupt on both the rising and falling edges.
+} ComparatorTriggerMode;
+
+/*! \brief Initializes the internal comparator. */
+void comparator_init(void);
+
+/*! \brief Reads the current value of the comparator.
+ *  \return Output value of the comparator.
+ */
+int comparator_read(void);
+
+/*! \brief Configures the event which will cause an interrupt.
+ *  \param trig  New triggering mode.
+ */
+void comparator_set_trigger(ComparatorTriggerMode trig);
+
+/*! \brief Pass a callback to the API, which is executed during the
+ *         interrupt handler.
+ *
+ *  \sa comparator_set_trigger to configure and enable the interrupt.
+ *
+ *  \param callback  Callback function.
+ */
+void comparator_set_callback(void (*callback)(int state));
+
+#endif // COMPARATOR_H

Discovery-F4/contents/module10/Code/SerialDemoI2C/drivers/dac.c

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+#include <dac.h>
+#include <platform.h>
+
+void dac_init(void) {
+	// Enable the internal DAC targeting an external pin,
+	// and any clock sources required to start the DAC.
+
+	//Enable the clock for DAC module and GPIO Port A
+	RCC->AHB1ENR|=RCC_AHB1ENR_GPIOAEN;
+	RCC->APB1ENR|=RCC_APB1ENR_DACEN;
+
+	//Configure the PoRT A pin 5 to be the Analogue
+	GPIOA->MODER|=GPIO_MODER_MODER5;
+	GPIOA->PUPDR&=~(GPIO_PUPDR_PUPDR5);
+
+	//Enable the DAC
+	DAC->CR|=DAC_CR_EN2;
+
+	//Write to the DAC channel1 12-bit right-aligned data holding register
+	DAC->DHR12R2=0;
+}
+
+void dac_set(int value) {
+	// Sets the output value of the DAC. This function does
+	// not need to wait until the DAC output has settled.
+
+	DAC->DHR12R2 = value;
+}
+
+// *******************************ARM University Program Copyright © ARM Ltd 2014*************************************   

Discovery-F4/contents/module10/Code/SerialDemoI2C/drivers/dac.h

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+/*!
+ * \file      dac.h
+ * \brief     Internal digital to analogue converter (DAC) controller.
+ * \copyright ARM University Program © ARM Ltd 2014.
+ */
+#ifndef DAC_H
+#define DAC_H
+
+/*! \brief Initializes the digital to analogue converter, and configures
+ *         the appropriate GPIO pin.
+ */
+void dac_init(void);
+
+/*! \brief Sets the DAC to a specified code.
+ *  \param value Code to set the DAC output to.
+ */
+void dac_set(int value);
+
+#endif
+
+// *******************************ARM University Program Copyright © ARM Ltd 2014*************************************