不韋 呂
Class library for internal ADC and DAC connected by SPI. This library support clock generator using TIM3 for switched-capacitor filter to smooth output signal of DAC. This library includes derivative class to support interrupt occured in end of AD conversion. Validated for ST Nucleo F401RE, F411RE. 内蔵 ADC と，SPI 接続の DAC のためのクラスライブラリ．DAC の出力信号を平滑化するためのスイッチトキャパシタフィルタ用のクロックは TIM3 を使用．ST Nucleo F401RE，F411RE で動作を確認．
Dependents: UITDSP_ADDA_Example UIT2_MovingAv_Intr UIT2_VariableFIR UIT2_VowelSynthesizer ... more
Diff: ADC_BuiltIn.hpp
- Revision:
- 4:03c4518de836
- Child:
- 5:ff25db28bc64
diff -r bb97069248de -r 03c4518de836 ADC_BuiltIn.hpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/ADC_BuiltIn.hpp Mon Mar 16 23:59:24 2015 +0000
@@ -0,0 +1,86 @@
+//------------------------------------------------------
+// Class for ADC using TIM2 trigger -- Header
+//
+// 2015/03/14, Copyright (c) 2015 MIKAMI, Naoki
+//------------------------------------------------------
+
+#ifndef ADC_BUILTIN_HPP
+#define ADC_BUILTIN_HPP
+
+#include "mbed.h"
+
+namespace Mikami
+{
+ class ADC_BuiltIn
+ {
+ private:
+ // Following object of AnalogIn class will be
+ // initialized by menber initializer
+ AnalogIn adc_;
+ // Following two objects of AnalogIn class will be
+ // initailized by regular executable statements
+ AnalogIn* adc2_;
+ AnalogIn* adc3_;
+
+ // Channel of ADC1
+ uint8_t ch1_, ch2_, ch3_;
+
+ // Set timer to generate sampling pulse for ADC
+ void SetTim2(int frequency);
+
+ // Exctract channel number
+ uint8_t GetChannelNumber(PinName);
+
+ // for inhibition of copy constructor
+ ADC_BuiltIn(const ADC_BuiltIn&);
+ // for inhibition of substitute operator
+ ADC_BuiltIn& operator=(const ADC_BuiltIn&);
+
+ protected:
+ // for normalize
+ static const float AMP_ = 1.0f/2048.0f;
+
+ ADC_TypeDef* const myAdc_;
+
+ // Wait until completion of AD conversion
+ void WaitDone()
+ { while((myAdc_->SR & ADC_SR_EOC) == RESET); }
+
+ public:
+
+ // Constructor
+ // pin1: Pin Name for input as A0, A1, etc.
+ // frequency: Sampling frequency
+ // pin2: If use 2nd channel set this parameter
+ // pin3: If use 3rd channel set this parameter
+ ADC_BuiltIn(PinName pin1, int frequency,
+ PinName pin2 = NC, PinName pin3 = NC);
+
+ // Read ADC with waiting, range: [0, 0x0FFF]
+ virtual uint16_t Read_u16()
+ {
+ WaitDone();
+ return myAdc_->DR;
+ }
+
+ // Read ADC with waiting, range: [-1.0f, 1.0f]
+ virtual float Read()
+ {
+ WaitDone();
+ return AMP_*((int16_t)myAdc_->DR - 2048);
+ }
+
+ // Select channel
+ void Select1stChannel() { myAdc_->SQR3 = ch1_; }
+ void Select2ndChannel() { myAdc_->SQR3 = ch2_; }
+ void Select3rdChannel() { myAdc_->SQR3 = ch3_; }
+
+ // Software start
+ virtual void SoftStart()
+ { myAdc_->CR2 |= ADC_CR2_SWSTART; }
+
+ uint32_t ReadSQR3() { return myAdc_->SQR3; }
+ };
+}
+#endif // ADC_BUILTIN_HPP
+