I2C experience? Please help :)

i new i2c, please explain me recorded salae logicanalyzer...

is writing address "8" , reading address "9"?

i trying learn i2c control factory cd player , display using cdm-m3 4.4 cddrive, pcf8578 & pcf8579 colum/row drivers.

will code equivalent recorded? @ least first 2 steps...

code: [select]



#include <wire.h>

void setup() {
  wire.begin(); // join i2c bus (address optional master)
}

void loop() {
  wire.begintransmission(8); // transmit device #8 (0x38)
  // device address specified in datasheet
  wire.write(byte(0x00)); // 0 - sends instruction byte
  wire.write(byte(0x02)); // 2
  wire.endtransmission(); // stop transmitting
  wire.requestfrom(9, 3); // request 3 bytes slave device #9

  delay(500);
}

quote

is writing address "8" , reading address "9"?

yes. typically, writing to, , reading from, same device, though.

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