Posted on October 13, 2015 at 14:52The original post was too long to process during our migration. Please click on the attachment to read the original post.
> Question 1: Where i dont know if to connect the displays chip select (/CS1) to SP1_NSS or to standart Output??
I did not read the display's datasheet, but if you need to change its level during (or before/after) communication, any pin set to output. Even if you connect it to a pin which can be used as SPI_NSS, you will need to handle it as a GPIO Output - the functionality of NSS in Master mode is rather crippled in the STM32 SPI implementation - read the RM. > Question 2: Is there something missing or not correct for a simple instruction transmission? I don't know, but you should learn that yourself by observing the waveforms on the pins using an oscilloscope and/or a logic analyzer and comparing them to the display's datasheet. > Question 3: Settings suggestions and explainations? NSS_Soft or Hard? Either, hard, turned to output (SSM = 0, SSOE = 1) and not connected in the AF matrix (as its permamently low after the first transition, i.e. useless); or soft, with SSI set (SSM=1, SSI=1). > Question 4: /CS1 as Output or SPI1_NSS??? Wasn't that question 1? JW
