nrf52832, sd card and accelerometer.

RE: nrf52832, sd card and accelerometer.

TTN — Wed, 06 May 2020 09:14:45 GMT

Hi, thanks for your reply, I encounter a problem, I didn't put fatfs_example() and initAcc(); in the main(), but it always runs the function fatfs_example() to read SD card, did you solve this problem before? How?

RE: nrf52832, sd card and accelerometer.

Iigori — Tue, 05 May 2020 10:39:47 GMT

Hi, i just initialized sd card first, then reseted accelerometer and reinitialized it.

RE: nrf52832, sd card and accelerometer.

TTN — Tue, 05 May 2020 09:55:06 GMT

Hi, I try the same structure using a sensor and sd card, the code flow is like the 12453.main.c seems that you solve the problem, would you share the solution you use to solve the problem?

RE: nrf52832, sd card and accelerometer.

Iigori — Thu, 27 Dec 2018 07:20:21 GMT

Problem solved. When initialized one of the device first that made another device BUS auto detect fail. That caused devices to not work in the right way.

RE: nrf52832, sd card and accelerometer.

Iigori — Wed, 12 Dec 2018 07:29:08 GMT

Seems that I might have some problem with the circuit. Need to buy oscilloscope for checking that.

RE: nrf52832, sd card and accelerometer.

Iigori — Mon, 10 Dec 2018 07:29:32 GMT

Thanks for reply Nguyen, I will try it.

RE: nrf52832, sd card and accelerometer.

Nguyen Hoan Hoang — Wed, 05 Dec 2018 21:23:40 GMT

Yes, you can have all 3 spi master at the same time. It probably just a driver issue. Try this SPI Driver. It works for all 3 spi and supports multiple devices on the same spi as well.

RE: nrf52832, sd card and accelerometer.

Iigori — Tue, 04 Dec 2018 07:44:24 GMT

So it seems I can't have 2 spi masters initialized at the same time.

Program works if i uninitialize sd card before executing initAcc.

What would be the best solution to use both at "same" time? Is constantly initializing and unitializing the spi master heavy duty?

RE: nrf52832, sd card and accelerometer.

Iigori — Mon, 03 Dec 2018 13:20:49 GMT

Hi Stian, I moved my code to "test" enviroment so i'm now only using spi instance 1 and spi instance 2. TWI is not enabled. It's quite frustrating that they are working, but not as together.

RE: nrf52832, sd card and accelerometer.

Stian Røed Hafskjold — Mon, 03 Dec 2018 13:18:07 GMT

And regarding using the same SPI bus with two slaves, I need to setup a project here to see what happens with the SD-card driver.

What you could try is to use two different SPI instances for the two slaves, but use the same GPIO configuration. Then you will have to uninitialize and re-initialize the SPI instance every time you want to start a new transfer, but at least the handlers are separate for the different instances.

First we would have to figure out why you can only enable one SPI instance at a time though. So please try to disable the TWI instance.

RE: nrf52832, sd card and accelerometer.

Stian Røed Hafskjold — Mon, 03 Dec 2018 13:11:31 GMT

Hi, what happens if you do not initialize the TWI sensor? The TWI peripheral is shared with the SPI peripheral, so you can't have both SPI0 and TWI0 enabled at the same time. SPI1 and TWI1 etc.

RE: nrf52832, sd card and accelerometer.

Iigori — Mon, 03 Dec 2018 12:28:58 GMT

Schematics:

devzone.nordicsemi.com/.../gleapper.pdf

Code:

devzone.nordicsemi.com/.../12453.main.cWhat have i missed? In main fatfs_example() works if it is called first and same does initAcc()