33 lines
698 B
C++
33 lines
698 B
C++
#include <SPI.h>
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#define cs_pin 44 // Chip Select pin (must match the slave setup)
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uint8_t dataToSend[256];
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void setup() {
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Serial.begin(115200);
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Serial.println("SPI Master Starting...");
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pinMode(cs_pin, OUTPUT);
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digitalWrite(cs_pin, HIGH);
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SPI2.begin();
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}
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void loop() {
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for (int i = 0; i < 256; i++) {
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dataToSend[i] = i;
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}
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SPI2.beginTransaction(SPISettings(22000000, MSBFIRST, SPI_MODE0));
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Serial.println("Sending data...");
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digitalWrite(cs_pin, LOW);
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SPI2.transfer(dataToSend, 256); // Send the whole array at once
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digitalWrite(cs_pin, HIGH);
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Serial.println("Data sent.");
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SPI2.endTransaction();
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delayMicroseconds(1000); // Wait before sending again
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}
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