不韋 呂 / UIT_ADDA

Class library for internal ADC and DAC connected by SPI. ADC is triggered by TIM2. 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. Slave select of SPI for DAC is generated using TIM4. Validated for ST Nucleo F401RE, F411RE.　New version. 内蔵 ADC と，SPI 接続の DAC のためのクラスライブラリ．ADC の変換開始トリガは TIM2 で発生．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．DAC の SPI 用スレーブ選択信号は TIM4 で発生．ST Nucleo F401RE，F411RE で動作を確認．新バージョン

Dependents:   UIT2_MovingAverage UIT2_AllpassReverb UIT2_CombReverb UIT2_FIR_LPF_Symmetry ... more

tim4_slaveSelect.hpp

Committer:
MikamiUitOpen
Date:
2015-02-02
Revision:
21:3731753ebf24
Parent:
14:6c60601c1834

File content as of revision 21:3731753ebf24:

//------------------------------------------------------
//  Class for generate SPI slave select using TIM4
//
//  Default pin assignments: PB_6 (D10)
//  PB_7, PB_8 (D15), and PB_9 (D14) also can be used
//  2014/12/21, Copyright (c) 2014 MIKAMI, Naoki
//------------------------------------------------------

#ifndef TIM4_SLAVESELECT_HPP
#define TIM4_SLAVESELECT_HPP

#include "mbed.h"

namespace Mikami
{
    class Tim4_ss
    {
    public:
        Tim4_ss(uint16_t psc,       // prescaler
                uint16_t arr = 18,  // auto-reload register
                PinName pin = PB_6) // pin name
                : myTim_(TIM4)
        {
            PwmOut css(pin);
            myTim_->CR1 |= TIM_CR1_OPM; // one-pulse mode
            myTim_->PSC = psc;          // prescaler
            myTim_->ARR = arr;          // pulse width
            if (pin == PB_6) myTim_->CCR1 = 1;
            if (pin == PB_7) myTim_->CCR2 = 1;
            if (pin == PB_8) myTim_->CCR3 = 1;
            if (pin == PB_9) myTim_->CCR4 = 1;
            if ( (pin != PB_6) && (pin != PB_7)
               &&(pin != PB_8) && (pin != PB_9) )
            {
                fprintf(stderr, "\r\nIllegal pin name in Tim4_ss class\r\n");
                while (true) {}
            }
        }
        // Generate slave select
        void SlaveSelect()
        {
            myTim_->CNT = 0;            // Set counter 0
            myTim_->CR1 |= TIM_CR1_CEN; // Enable TIM4
            __NOP();
            __NOP();
            __NOP();
            __NOP();
#ifdef __STM32F411xE_H
            __NOP();
            __NOP();
#endif  // __STM32F411xE_H
        }
    private:
        TIM_TypeDef* myTim_;

        // Forbid to use copy constructor
        Tim4_ss(const Tim4_ss&);
        // Forbid to use substitution operator
        Tim4_ss operator=(const Tim4_ss&);
    };
}
#endif  // TIM4_SLAVESELECT_HPP