two spi parallel

RE: two spi parallel

Jared — Fri, 07 Dec 2018 08:21:05 GMT

As I wrote in the last comment, it would be much easier to find the error if you could provide more information regarding the signal lines.

RE: two spi parallel

vohra alihussain — Thu, 29 Nov 2018 06:01:16 GMT

have you checked the code??

RE: two spi parallel

Jared — Tue, 27 Nov 2018 14:35:01 GMT

[quote user="vohra alihussain"]yes there is activity on spi lines...[/quote]

Could you be more specific? What are you observing?
Is Chip select set properly?
Is the clock correct?
What are you observing on the data lines?

RE: two spi parallel

vohra alihussain — Tue, 27 Nov 2018 12:53:10 GMT

i am using only one spi instance

hardware is setup correct, we had confirmed with nordic...

yes there is activity on spi lines...

will you check the code?

i am attaching the revised code..devzone.nordicsemi.com/.../3034.memory.c devzone.nordicsemi.com/.../6153.memory.h devzone.nordicsemi.com/.../6472.main.c

spi0 is enabled in config file.

RE: two spi parallel

Jared — Tue, 27 Nov 2018 12:27:29 GMT

Only one SPI instance should be used for the bus.
As already mentioned, we should ensure that your HW is setup correctly, before debugging your code. Could you provide a Schematic of the design?
Can you measure if there is any activity on the lines during the SPI communication?
Is Chip select set properly?

Jared

RE: two spi parallel

vohra alihussain — Sat, 24 Nov 2018 17:21:36 GMT

sorry awneil,

i am attaching the files where you can see the spi instances.

devzone.nordicsemi.com/.../7183.main.c devzone.nordicsemi.com/.../0334.memory.c devzone.nordicsemi.com/.../nrf_5F00_drv_5F00_mpu_5F00_spi.c

RE: two spi parallel

awneil — Fri, 23 Nov 2018 15:43:37 GMT

[quote userid="72270" url="~/f/nordic-q-a/40851/two-spi-parallel/158878"]i didn't check the spi lines....but they are connected correctly..[/quote]

You need to check what is actually happening on those lines; ie, the electrical activity.

Are you getting a clock?
Are the Chip Selects working correctly?
etc, etc, ...

[quote userid="72270" url="~/f/nordic-q-a/40851/two-spi-parallel/158878"]are you sure both should have same instances?[/quote]

No.

The Nordic documentation is rather poor here - I can' see any clear statement of what an "instance" actually represents.

You could trawl through the code to see if it ends up representing one particular hardware peripheral ...

How to properly post source code:

RE: two spi parallel

vohra alihussain — Fri, 23 Nov 2018 15:24:50 GMT

yes i debug it but nothing found.

i am not getting error codes.

i didn't check the spi lines....but they are connected correctly..

are you sure both should have same instances?

i have given both spi instance id as "0"

i am giving initialization fuction for both:

static const nrf_drv_spi_t spi = NRF_DRV_SPI_INSTANCE(flash_SPI_INSTANCE_ID);
uint32_t flash_init(void)
{

const nrf_drv_spi_config_t flash_config = { \
.sck_pin = flash_SCK_PIN,
.mosi_pin = flash_MOSI_PIN,
.miso_pin = flash_MISO_PIN,
.ss_pin = flash_CS_PIN,
.irq_priority = APP_IRQ_PRIORITY_HIGH,
.orc = 0xFF,
.frequency = NRF_DRV_SPI_FREQ_1M,
.mode = NRF_DRV_SPI_MODE_0,
.bit_order = NRF_DRV_SPI_BIT_ORDER_MSB_FIRST,
};

return nrf_drv_spi_init(&spi, &flash_config,spi_event_handler);
}

uint32_t nrf_drv_mpu_init(void)
{

const nrf_drv_spi_config_t spi_mpu_config = { \
.sck_pin = MPU_SPI_SCL_PIN,
.mosi_pin = MPU_SPI_MOSI_PIN,
.miso_pin = MPU_SPI_MISO_PIN,
.ss_pin = MPU_SPI_CS_PIN,
.irq_priority = APP_IRQ_PRIORITY_HIGH,
.orc = 0xFF,
.frequency = NRF_DRV_SPI_FREQ_1M,
.mode = NRF_DRV_SPI_MODE_0,
.bit_order = NRF_DRV_SPI_BIT_ORDER_MSB_FIRST,
};

return nrf_drv_spi_init(&m_spi_instance, &spi_mpu_config, nrf_drv_mpu_spi_event_handler);
}

RE: two spi parallel

awneil — Fri, 23 Nov 2018 15:12:48 GMT

So what testing / investigation / debugging have you done to find what's going on?

Are you getting any error codes?

Are the SPI lines behaving correctly?

RE: two spi parallel

vohra alihussain — Fri, 23 Nov 2018 15:08:35 GMT

i don't know, but i tried to give them same spi instance "0",but only one device works...

RE: two spi parallel

awneil — Fri, 23 Nov 2018 15:03:33 GMT

If they share the same SPI lines then, surely, they must be sharing the same SPI instance ?