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

Diff: DAC_MCP4922.hpp

Revision:
8:f933fcd30408
Parent:
3:77bc5550dc10
Child:
14:6c60601c1834
--- a/DAC_MCP4922.hpp	Tue Nov 11 10:04:00 2014 +0000
+++ b/DAC_MCP4922.hpp	Wed Nov 12 08:56:31 2014 +0000
@@ -5,10 +5,16 @@
 // Default pin assign
 //      D11  SPI Master Out Slave In
 //      D13  SPI Serial Clock
-//      D12  SPI Slave Select
-//      D10  to MCP4922 LDAC pin
+//      D10  SPI Slave Select
+//      D12  to MCP4922 LDAC pin
 //
-// 2014/10/23, Copyright (c) 2014 MIKAMI, Naoki
+// Argument cs in constructor must be output of TIM4,
+// i.e. D10(PB_6), PB_7, D15(PB_8), or D14(PB_9)
+//
+// Clock for Switched-capacitor filter:
+//      Output pin: D9 (PC7) ------ TIM3 CH2
+//
+// 2014/11/12, Copyright (c) 2014 MIKAMI, Naoki
 //------------------------------------------------------
 
 #ifndef DAC_MCP4922_HPP
@@ -44,6 +50,10 @@
         // Check busy
         bool IsBusy()
         { return (mySpi_->SR & SPI_FLAG_BSY) == SPI_FLAG_BSY; }
+        
+        // Set clock for switched-capacitor filter
+        void ScfClockTim3(uint32_t clock);
+
 
     private:
         uint16_t wcr_;  // write command register