F446_DAC.cpp

00001 //--------------------------------------------------------
00002 //  Class for buit-in dual DAC on STM32F446
00003 //
00004 //  STM32F446 内蔵の DAC 用のクラス
00005 //      DAC_OUT1: A2  (PA_4), 左
00006 //      DAC_OUT2: D13 (PA_5), 右
00007 //
00008 //  2016/11/12, Copyright (c) 2016 MIKAMI, Naoki
00009 //--------------------------------------------------------
00010 
00011 #include "F446_DAC.hpp"
00012 
00013 namespace Mikami
00014 {
00015     void DacDual::ScfClock(uint32_t clock)
00016     {
00017         PwmOut clockSCF(D12);   // PA6
00018 
00019         uint32_t arr;
00020         if ((RCC->DCKCFGR & RCC_DCKCFGR_TIMPRE) == RCC_DCKCFGR_TIMPRE)
00021             arr = SystemCoreClock/clock - 1;
00022         else
00023             arr = SystemCoreClock/(2*clock) - 1;
00024         TIM3->ARR =  arr;
00025         TIM3->PSC = 0;
00026 
00027         // Set capture/compare register 1
00028         TIM3->CCR1 = (TIM3->ARR + 1)/2;    
00029     }
00030 }