- 최초 업데이트
  ㄴ 5V regulator 모듈사용으로 변경
  ㄴ 이전 도면 백업을 위한 commit
main
Changwoo Park 2 years ago
parent 00529466cf
commit 103eba589e

File diff suppressed because it is too large Load Diff

File diff suppressed because it is too large Load Diff

@ -0,0 +1,77 @@
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File diff suppressed because it is too large Load Diff

@ -1,47 +0,0 @@
// MCP4922 Demo code sinewave at 16 res top to bot.
// For comparison to MCP4725 operation (DAC_RESOLUTION=-5).
#include <SPI.h>
SPISettings settingsA(16000000, MSBFIRST, SPI_MODE0); // At 16 = SPI Clock = 8MHz.
int RCLKPin = 53; // pin 12 on the 74hc595 latch - nSS
int SRCLKPin = 52; // pin 11 on the 74hc595 shift register clock - SCK
int SERPin = 51; // MOSI
//////////////////////////////////////////////////////////////////////////////
void setup() {
Serial.begin(115200); // Start serial port (debug).
pinMode(RCLKPin, OUTPUT); // Set SPI control PINs to output.
pinMode(SRCLKPin, OUTPUT);
pinMode(SERPin, OUTPUT);
SPI.begin();
Serial.println("MCP4922 SPI Dual DAC SPI hardware mode");
noInterrupts();
}
//////////////////////////////////////////////////////////////////////////////
// 0 - A, 1 - B
//
void writeMCP4922_AB(byte AB, uint16_t v) {
v |=0xf000; // B15(A/B)=1 B, B14(BUF)=1 on, B13(GAn) 1=x1 B12(SHDNn) 1=off
if (!AB) v &= ~0x8000; // When zero clear B15 for A.
SPI.beginTransaction(settingsA);
digitalWrite(RCLKPin, LOW);
SPI.transfer( (0xff00 & v)>>8 );
SPI.transfer( 0x00ff & v );
digitalWrite(RCLKPin, HIGH);
SPI.endTransaction;
}
void loop() {
writeMCP4922_AB( 0, 4092 );
writeMCP4922_AB( 1, 3000 );
}
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