https://community.nxp.com/t5/LPC-Microcontrollers/How-to-send-a-non-constant-buffer-over-i2c/m-p/1568079#M50991 <P>No, you can't.</P><P>I2C is a bus with a strict master-slave design. Only the master device can initiate transfers.</P><P><EM>&gt; Can i send a non constant buffer ...</EM></P><P><SPAN>I assume with "non constant" you mean of onknown length.<BR />The usual method here is to execute consecutive (multi-byte) reads until the slave device returns NACK.<BR /></SPAN></P><P><SPAN>I2C memory and MEMS sensor devices are good examples for such protocols.</SPAN></P> Mon, 12 Dec 2022 08:22:06 GMT frank_m 2022-12-12T08:22:06Z https://community.nxp.com/t5/LPC-Microcontrollers/How-to-send-a-non-constant-buffer-over-i2c/m-p/1567773#M50989 <P>Hello everybody,</P><P>i have a question about the MCUXPRESSO SDK. Can i send a non constant buffer(uint8_t) as a I2C Slave? I do not found a function to send a uint8_t buffer from a slave to master after a master request.</P><P>Thanks for your answers.</P> Sun, 11 Dec 2022 13:14:06 GMT https://community.nxp.com/t5/LPC-Microcontrollers/How-to-send-a-non-constant-buffer-over-i2c/m-p/1567773#M50989 coder_72 2022-12-11T13:14:06Z https://community.nxp.com/t5/LPC-Microcontrollers/How-to-send-a-non-constant-buffer-over-i2c/m-p/1568079#M50991 <P>No, you can't.</P><P>I2C is a bus with a strict master-slave design. Only the master device can initiate transfers.</P><P><EM>&gt; Can i send a non constant buffer ...</EM></P><P><SPAN>I assume with "non constant" you mean of onknown length.<BR />The usual method here is to execute consecutive (multi-byte) reads until the slave device returns NACK.<BR /></SPAN></P><P><SPAN>I2C memory and MEMS sensor devices are good examples for such protocols.</SPAN></P> Mon, 12 Dec 2022 08:22:06 GMT https://community.nxp.com/t5/LPC-Microcontrollers/How-to-send-a-non-constant-buffer-over-i2c/m-p/1568079#M50991 frank_m 2022-12-12T08:22:06Z