#include <SPI.h>

const int CS_PIN = 10;
const int NUM_DEVICES = 48;

void setup() {
    Serial.begin(115200);
    SPI.begin();
    SPI.beginTransaction(SPISettings(1000000, MSBFIRST, SPI_MODE0));
    pinMode(CS_PIN, OUTPUT);
    
    // Tänd en matris i taget för diagnostik
    for(int device = 0; device < NUM_DEVICES; device++) {
        Serial.print("Testing device: ");
        Serial.println(device);
        
        initDevice();
        
        // Tänd alla rader på denna matris
        for(int row = 1; row <= 8; row++) {
            digitalWrite(CS_PIN, LOW);
            for(int i = 0; i < NUM_DEVICES; i++) {
                if(i == device) {
                    SPI.transfer(row);
                    SPI.transfer(0xFF);
                } else {
                    SPI.transfer(0x00);
                    SPI.transfer(0x00);
                }
            }
            digitalWrite(CS_PIN, HIGH);
        }
        delay(100);
    }
}

void initDevice() {
    sendCommand(0x0C, 0x01);
    sendCommand(0x0A, 0x0F);
    sendCommand(0x09, 0x00);
    sendCommand(0x0B, 0x07);
}

void sendCommand(uint8_t reg, uint8_t data) {
    digitalWrite(CS_PIN, LOW);
    for(int i = 0; i < NUM_DEVICES; i++) {
        SPI.transfer(reg);
        SPI.transfer(data);
    }
    digitalWrite(CS_PIN, HIGH);
}

void loop() {}