Rami Posted March 31, 2020 Posted March 31, 2020 Hello, I am working with a Nanopi Neo Air incorporating the System on Chip Allwinner H3. I need to establish a serial communication via the SPI bus, to do this I am looking for some information related to the SPI bus. Can you help me to know the following information please: - What are the min and max SPI bus frequencies that I can use with the Nanopi Neo Air (Allwinner H3)? How can I calculate them? And are there specific frequency values to use (meaning the relationship is not linear, for example: 3.84MHz, 4.34MHz, etc)? - Can the Nanopi Neo Air be configured as an SPI bus master and as a slave (not at the same time) or only as a master? - What is the maximum number of bits that we can send via the SPI bus per second? If there are several, can you please specify them? Thank you very much in advance. Best regards, Rami
martinayotte Posted March 31, 2020 Posted March 31, 2020 On 3/31/2020 at 10:23 AM, Rami said: only as a master? Expand Although hardware is "slave" capable, the linux kernel driver is not capable.
Rami Posted April 2, 2020 Author Posted April 2, 2020 On 3/31/2020 at 12:22 PM, martinayotte said: Although hardware is "slave" capable, the linux kernel driver is not capable. Expand Hello, Thank you for your response. Can you help me find the answers to the other questions please? Best regards, Rami.
martinayotte Posted April 2, 2020 Posted April 2, 2020 On 4/2/2020 at 10:31 AM, Rami said: Can you help me find the answers to the other questions please? Expand Some answers could be found here : https://linux-sunxi.org/SPIdev Maybe you could details what you wish to accomplish ...
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