I am working with SPIS example ( sdk version 15.3). SPI master send data regulaly. For example, it sent 5ms cs low, but there are only two bytes transferred, the first byte at begin of 5ms, other one at the end. SPIS of nrf52 
not read the second one, what can I do with it?
Hello,
From your main.c file, you have:
APP_ERROR_CHECK(nrf_drv_spis_buffers_set(&spis, m_tx_buf, 0, m_rx_buf, 1));
Try to increase the length of the receive buffer, which you currently have set to 1.
Can you try:
APP_ERROR_CHECK(nrf_drv_spis_buffer_set(&spis, m_tx_buf, 2, m_rx_buf, 2));
I had tried from 2 to 20, the same result.
I had tried unmodified spis again, only add the instructions you give to me, no any more changed, the second bytes was lost, and many bytes not printed in log info, but only the first was printed with server 0x00. i think maybe print log info take so much time, so some bytes was lost.
I tried to store all data to a big buffer like the amount reached to 200 without printing any log info, i tried setup the break point when the 200 data had stored to the buffer, then to find the second bytes, result tell me i was fail again.
So i can sure, your minimum high of the CS 300ns is wrong, because i can get the second byte with logic analyzer but the 52832 could not. Could you give me any advice?
Is it possible to save the file that this screenshot is from?
I would like to measure some timings. It may be that the nRF doesn't have time to start the clocks. Can you try to enable the HCLK and keep it running? Does that change the behavior?
BR,
Edvin
Time[s], CS, MOSI, CLK 0.000000000, 1, 0, 0 0.035279500, 0, 0, 0 0.035283320, 0, 0, 1 0.035299280, 0, 1, 1 0.035315260, 0, 0, 1 0.035315280, 0, 0, 0 0.035331240, 0, 1, 0 0.035347220, 0, 0, 0 0.035363200, 0, 1, 0 0.035379160, 0, 0, 0 0.035395140, 0, 1, 0 0.035411140, 0, 0, 0 0.035427100, 0, 1, 0 0.035443080, 0, 0, 0 0.035459060, 0, 1, 0 0.035475040, 0, 0, 0 0.035491020, 0, 1, 0 0.035507000, 0, 0, 0 0.035522980, 0, 1, 0 0.035538960, 0, 0, 0 0.039152900, 1, 0, 0 0.039156380, 0, 0, 0 0.039198400, 0, 1, 0 0.039214380, 0, 0, 0 0.039230360, 0, 1, 0 0.039246340, 0, 0, 0 0.039246360, 0, 0, 1 0.039262320, 0, 1, 1 0.039278300, 0, 0, 1 0.039278320, 0, 0, 0 0.039294280, 0, 1, 0 0.039310260, 0, 0, 0 0.039326240, 0, 1, 0 0.039342200, 0, 0, 0 0.039358200, 0, 1, 0 0.039374180, 0, 0, 0 0.039390160, 0, 1, 0 0.039406140, 0, 0, 0 0.039422120, 0, 1, 0 0.039438100, 0, 0, 0 0.039553360, 1, 0, 0 0.039587580, 0, 0, 0 0.039613860, 0, 1, 0 0.039629840, 0, 0, 0 0.039645820, 0, 1, 0 0.039661800, 0, 0, 0 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Hope the detail information could help you to solve the problem.
By the way how can i enable the HCLK?
Is the priority could cause the the problem?
Hello,
I am sorry that I didn't specify this, but can you send the .logicdata file? It is not possible to open CSV files in the logic analyzer application.
You can use nrf_drv_clock_hfclk_request() to start the HF_CLK.
Best regards,
Edvin
Hello,
I am sorry that I didn't specify this, but can you send the .logicdata file? It is not possible to open CSV files in the logic analyzer application.
You can use nrf_drv_clock_hfclk_request() to start the HF_CLK.
Best regards,
Edvin
You can use the software download from http://www.qdkingst.com/en/download , and import the dat which i post!
Because file extension couldn't be allow by the up-loader, so please remove the .bin before you import the file.
I will try to start the HF_CLK, thanks.
Best regards,
xin
