RE: Issue restarting a transaction in a serialized application

Romain — Thu, 22 Dec 2016 10:50:17 GMT

Thanks for your answer. I have received the 0x00 which tells me that the slave is not ready to exchange and this information is then transmitted to the state machine which set the abort flag to true. My problem is that spi_master_send_recv_irq need to be re-entered in order to initiate the restart procedure (going into that else if (p_spi_instance->abort_flag) condition). I don't see how this function can be re-entered as tranfert is now stop

RE: Issue restarting a transaction in a serialized application

Susheel Nuguru — Tue, 20 Dec 2016 15:09:01 GMT

can't you just make the spi slave transmit 0x00 for the first byte instead of changing the code? I am not an expert in 5W protocol, but it looks like it is how it was designed. See this SPI 5W