Hi to all,
I am working on the kl25z with the KDS and PE acording to Erich Styger great tutorial: SPI | MCU on Eclipse . I have a temperature sensor I am connecting throw SPI (with 32-bit wide), which only have a MISO. in addition I connect to a EEPROM using the same SPI (SPI0), which have both MISO and MOSI, and I use other pins for CS.
I have created the SPI_Master_LDD component in PE for the communication with both of the SPI devices working without the SPI interrupt mode.
My problem: I try to read the data from the temperature sensor using only the SM1_ReceiveBlock without calling the SM1_SendBlock but that is not working. when I try adding the SM1_SendBlock with a dummy data, it does 8-bit reading and then 8-bit writing and goes around 4 times (because the data size is 32-bit). the problem is because the temperature sensor is not allowing writing it is sending part of the bits during the clock cycle used for the dummy writing, and what I get is not the complete data (this is verified using a scope).
am I doing something wrong? Is there a way to make the reading work without calling SM1_SendBlock?
Thanks in advance