About Leo_Houston

Leo_Houston · 2024-07-31

I'm trying to follow the test procedure for BlueNRG-MS (SPI) indicated in the Bringing up the BlueNRG and BlueNRG-MS devices - Application note (AN4494).I am using custom board (Microchip dsPIC33F) to talk to BlueNR-M0A.SPI Setting: 625K baud rate, S...

Leo_Houston · 2024-08-05

Hi Barry, I did quick test to verify the issue was caused by CS line staying LOW too short.1. I changed SPI baud rate to 312.5K which I will use on final firmware, Tclk = 3.2us.2. Set Delay_us(10) between CS Line HIGH and LOW: last step always return...

Leo_Houston · 2024-08-03

Thanks Barry.I didn't read through BlueNRG-MS datasheet, only BlueNRG-M0 datasheet. The CS HIGH hold time was set to 10uS when it failed. Then I set it to 100uS. I didn't try some values in the middle. I will try to reduce CS high hold time on Monday...

Leo_Houston · 2024-08-03

A quick update on this issue:I got it work. For my case, it seems a timing issue, in Step 5, that is, raising the CS, lowers it again, I didn't keep the CS high long enough. So after raising the CS, added 100~150uS delay, and then lower the CS. By t...

Leo_Houston · 2024-08-01

Hi Barry,On Figure 3, if you compare the length between first reply and second reply, the last 6 bytes were read indeed. I think it was marked wrong on 6. Second reply. Leo

Leo_Houston · 2024-08-01

Thank you Barry for reply.SC line did stay LOW on Step 6 and 7. Please refer to attached screenshot. CH3 is CS line.Leo

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BlueNRG-M0A Issue with Bringing up the BlueNRG and BlueNRG-MS devices (AN4494)

Re: BlueNRG-M0A Issue with Bringing up the BlueNRG and BlueNRG-MS devices (AN4494)

Re: BlueNRG-M0A Issue with Bringing up the BlueNRG and BlueNRG-MS devices (AN4494)

Re: BlueNRG-M0A Issue with Bringing up the BlueNRG and BlueNRG-MS devices (AN4494)

Re: BlueNRG-M0A Issue with Bringing up the BlueNRG and BlueNRG-MS devices (AN4494)

Re: BlueNRG-M0A Issue with Bringing up the BlueNRG and BlueNRG-MS devices (AN4494)