49 lines
1.6 KiB
C++
49 lines
1.6 KiB
C++
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#include <wiringPi.h>
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#include <wiringPiI2C.h>
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const int adcAddr = 0x48; // ADC address
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const int serialBaudRate = 115200; // Serial monitor baud rate
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const float toggleDelay = 0.2; // Delay between toggling bits, in microseconds
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int main(void) {
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int fd; // File descriptor for I2C device
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uint32_t buffer[8] = {0}; // Initialize buffer array with zeroes
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uint8_t bitCount = 0; // Number of generated bits
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// Initialize WiringPi and open I2C device
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wiringPiSetup();
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fd = wiringPiI2CSetup(adcAddr);
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// Print buffer values in binary format
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for (int i = 0; i < 8; i++) {
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uint32_t randomValue = 0; // Initialize random value
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while (bitCount < 32) {
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uint16_t adcValue = wiringPiI2CReadReg16(fd, 0x00); // Read ADC value
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uint32_t newBit = adcValue & 0x01; // Extract LSB from ADC value
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randomValue = (randomValue << 1) | newBit; // Add new bit to LSB
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bitCount++; // Increment number of generated bits
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delayMicroseconds(toggleDelay); // Delay
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}
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buffer[i] = randomValue; // Save random value in buffer array
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bitCount = 0; // Reset number of generated bits
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}
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// Print buffer values in binary format
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for (int i = 0; i < 8; i++) {
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Serial.print(formatBinary(buffer[i])); // Print generated 32-bit values in binary format
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}
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Serial.println(); // New line to separate from other outputs
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return 0;
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}
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String formatBinary(uint32_t number) {
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String binaryString = String(number, BIN); // Convert to binary string
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while (binaryString.length() < 32) {
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binaryString = "0" + binaryString; // Pad with leading zeroes
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}
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return binaryString;
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}
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