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: DAC_MCP4922.hpp
- Revision:
- 0:2cdd5c91d975
- Child:
- 2:0cf4cc40ee02
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/DAC_MCP4922.hpp Fri Feb 20 05:52:03 2015 +0000
@@ -0,0 +1,47 @@
+//------------------------------------------------------
+// Class for single DAC in MCP4922
+//
+// 2015/01/31, Copyright (c) 2015 MIKAMI, Naoki
+//------------------------------------------------------
+
+#ifndef DAC_MCP4922_HPP
+#define DAC_MCP4922_HPP
+
+#include "DAC_MCP4921.hpp"
+
+namespace Mikami
+{
+ class DAC_MCP4922 : public DAC_MCP4921
+ {
+ public:
+ enum DAC { DAC_A = 0, DAC_B = 0x8000 };
+
+ // Constructor
+ DAC_MCP4922(
+ DAC dac = DAC_A, // channel A
+ PinName mosi = SPI_MOSI, // D11
+ PinName sclk = SPI_SCK, // D13
+ PinName cs = SPI_CS, // D10
+ PinName ldac = SPI_MISO) // D12
+ : DAC_MCP4921(mosi, sclk, cs, ldac),
+ wcr_(dac | 0x3000) {}
+
+ private:
+ uint16_t wcr_; // write command register
+
+ // for inhibition of copy constructor
+ DAC_MCP4922(const DAC_MCP4922&);
+ // for inhibition of substitute operator
+ DAC_MCP4922& operator=(const DAC_MCP4922&);
+
+ // for internal use
+ virtual void WriteDac(uint16_t value)
+ {
+ while (IsBusy()) {}
+ SlaveSelect();
+ WriteSpi(value | wcr_);
+ }
+ };
+}
+#endif // DAC_MCP4922_HPP
+