using spi reading External flash

RE: using spi reading External flash

mdevil39 — Tue, 03 Mar 2020 10:17:22 GMT

After write operation , you should set a delay and then to do read operation .

RE: using spi reading External flash

dolrairom — Fri, 02 Aug 2019 11:01:00 GMT

[quote userid="71664" url="~/f/nordic-q-a/37124/using-spi-reading-external-flash/143071"]I add the delay time(5us) between the write and read[/quote]

Hey! How did you do that? I'm getting the same error obtaining 0xff all the time.

RE: using spi reading External flash

shital — Fri, 30 Nov 2018 11:35:54 GMT

hello

witch IDE and witch controller use?

RE: using spi reading External flash

mdevil39 — Mon, 06 Aug 2018 15:25:20 GMT

Thanks for your reply . It works now , I add the delay time(5us) between the write and read .

RE: using spi reading External flash

Håkon Alseth — Mon, 06 Aug 2018 08:40:29 GMT

I'd recommend using a logic analyzer to scope your SPI lines to see if the actual transmission of data (both ways) is correct.

RE: using spi reading External flash

mdevil39 — Sat, 04 Aug 2018 14:28:55 GMT

Mode 0. I don't know if the write has been success . If not then the reading is right.

RE: using spi reading External flash

Håkon Alseth — Fri, 03 Aug 2018 11:23:46 GMT

Hi,

Have you scoped the lines to see how it responds?

What SPI mode are you using?

Best regards,

Håkon

RE: using spi reading External flash

mdevil39 — Fri, 03 Aug 2018 02:07:26 GMT

Using the command 0x9f it can read the manufacture ID, but it cannot read the data(All data returns are 0xff) , I don't know which step goes wrong, write or erase or read ?