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https://github.com/RobTillaart/Arduino.git
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106 lines
2.0 KiB
C++
106 lines
2.0 KiB
C++
//
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// FILE: MCP4911_test.ino
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// AUTHOR: Rob Tillaart
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// PURPOSE: test MCP4921 lib
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// DATE: 2021-05-26
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// URL: https://github.com/RobTillaart/MCP4921
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#include "MCP_DAC.h"
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// MCP4911 MCP(11, 13); // SW SPI
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MCP4911 MCP; // HW SPI
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volatile int x;
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uint32_t start, stop;
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void setup()
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{
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Serial.begin(115200);
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Serial.println(__FILE__);
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Serial.print("SPI:\t");
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Serial.println(MCP.usesHWSPI());
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MCP.begin(10);
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Serial.print("SPI:\t");
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Serial.println(MCP.usesHWSPI());
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Serial.print("MCP_DAC_LIB_VERSION: ");
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Serial.println(MCP_DAC_LIB_VERSION);
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Serial.println();
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Serial.print("CHANNELS:\t");
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Serial.println(MCP.channels());
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Serial.print("MAXVALUE:\t");
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Serial.println(MCP.maxValue());
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delay(100);
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performance_test();
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analogWrite_test();
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Serial.println("\nDone...");
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}
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void analogWrite_test()
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{
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Serial.println();
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Serial.println(__FUNCTION__);
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for (int channel = 0; channel < MCP.channels(); channel++)
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{
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Serial.println(channel);
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for (uint16_t value = 0; value < MCP.maxValue(); value += 0xFF)
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{
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MCP.analogWrite(value, channel);
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Serial.print(value);
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Serial.print("\t");
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Serial.println(analogRead(A0));
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delay(10);
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}
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}
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}
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void performance_test()
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{
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Serial.println();
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Serial.println(__FUNCTION__);
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start = micros();
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for (uint16_t value = 0; value < MCP.maxValue(); value++)
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{
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x = MCP.analogWrite(value, 0);
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}
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stop = micros();
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Serial.print(MCP.maxValue());
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Serial.print(" x MCP.analogWrite():\t");
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Serial.print(stop - start);
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Serial.print("\t");
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Serial.println((stop - start) / (MCP.maxValue() + 1.0) );
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delay(10);
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start = micros();
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for (uint16_t value = 0; value < MCP.maxValue(); value++)
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{
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MCP.fastWriteA(value);
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}
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stop = micros();
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Serial.print(MCP.maxValue());
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Serial.print(" x MCP.fastWriteA():\t");
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Serial.print(stop - start);
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Serial.print("\t");
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Serial.println((stop - start) / (MCP.maxValue() + 1.0) );
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delay(10);
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}
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void loop()
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{
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}
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// -- END OF FILE --
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