HIGH CONSUMPTION UARTE1

RE: HIGH CONSUMPTION UARTE1

Edward_Atam — Mon, 10 Jun 2019 15:18:44 GMT

DEar Simonr

I realized that this was a hardware problem in my devices.

I have more questions about Openhread API, but I'm going to create a new thread.

Thank you very much for your time!!

RE: HIGH CONSUMPTION UARTE1

Simonr — Fri, 31 May 2019 06:48:05 GMT

Hi Edward

Do you have the same problems when using the serial_uartes example provided in the SDK? What are you using to measure the current? Also, can you confirm that the values you are reading and writing are read and written correctly? And last, do you get an error code if you try going to sleep?

Best regards,

Simon

RE: HIGH CONSUMPTION UARTE1

Edward_Atam — Thu, 30 May 2019 12:03:29 GMT

Hi Simonr,

At the end I updated the SDK and now I'm using nRF5 SDK for Thread and Zigbee v3.0.0 but I have the same problem more or less...

I did three tests using UARTE1 (mode DMA):

1º When I write by UARTE1 but never read, the current is 0.3mA

My code:

ret = nrf_serial_init(&serial1_uarte, &m_uarte1_drv_config, &serial1_config);
APP_ERROR_CHECK(ret);

ret = nrf_serial_write(&serial1_uarte,&tx[2],tx[1],NULL,NRF_SERIAL_MAX_TIMEOUT);

(void)nrf_serial_flush(&serial1_uarte, 0);

// memset(buffer_uartRx,0,sizeof(buffer_uartRx));
// while(nrf_serial_read(&serial1_uarte, &buffer_uartRx[tam_buffer_uartRx], 1, NULL, 10)==NRF_SUCCESS)
// tam_buffer_uartRx++;
nrf_serial_uninit(&serial1_uarte);

*(volatile uint32_t *)0x40028FFC = 0; // Power down UARTE1
*(volatile uint32_t *)0x40028FFC;
*(volatile uint32_t *)0x40028FFC = 1; // Power on UARTE1 so it is ready

2º When I write and read without power down UARTE1, the current is 2.4mA

My code:

ret = nrf_serial_init(&serial1_uarte, &m_uarte1_drv_config, &serial1_config);
APP_ERROR_CHECK(ret);

ret = nrf_serial_write(&serial1_uarte,&tx[2],tx[1],NULL,NRF_SERIAL_MAX_TIMEOUT);

(void)nrf_serial_flush(&serial1_uarte, 0);

memset(buffer_uartRx,0,sizeof(buffer_uartRx));
while(nrf_serial_read(&serial1_uarte, &buffer_uartRx[tam_buffer_uartRx], 1, NULL, 10)==NRF_SUCCESS)
tam_buffer_uartRx++;
nrf_serial_uninit(&serial1_uarte);

THE CURRENT IS 2.4mA

3º When I write and read with power down UARTE1, the current is 1.7mA

My code:

ret = nrf_serial_init(&serial1_uarte, &m_uarte1_drv_config, &serial1_config);
APP_ERROR_CHECK(ret);

ret = nrf_serial_write(&serial1_uarte,&tx[2],tx[1],NULL,NRF_SERIAL_MAX_TIMEOUT);

(void)nrf_serial_flush(&serial1_uarte, 0);

memset(buffer_uartRx,0,sizeof(buffer_uartRx));
while(nrf_serial_read(&serial1_uarte, &buffer_uartRx[tam_buffer_uartRx], 1, NULL, aux_tmp)==NRF_SUCCESS)
tam_buffer_uartRx++;
nrf_serial_uninit(&serial1_uarte);

*(volatile uint32_t *)0x40028FFC = 0; // Power down UARTE1
*(volatile uint32_t *)0x40028FFC;
*(volatile uint32_t *)0x40028FFC = 1; // Power on UARTE1 so it is ready

THE CURRENT IS 1.7mA

Also I tried to read only once at the beginning of my program and never read again but the current did'nt go down. (1.7mA)

So, when initiating the UARTE, writing to it, BUT not reading from it, the current is really low.

But, just reading a single byte, the current increases more than 1mA. And never goes down again.

How can we fix this, in our opinion, erroneous behaviour?

Any help is wellcome.

Best regards

Thank you!!!

RE: HIGH CONSUMPTION UARTE1

Simonr — Wed, 10 Apr 2019 07:12:11 GMT

Hi Edward

The SDK you are using is very old (older than the workaround I proposed), so first of all, I suggest you update to the newest Thread SDK v3.0.0, as I suspect just updating your SDK might be enough to solve the problem for you.

Best regards,

Simon

RE: HIGH CONSUMPTION UARTE1

Edward_Atam — Tue, 09 Apr 2019 13:15:59 GMT

Hi Simon!!

I'm using nRF5 SDK for Thread v0.11.0.

I saw that solution, and I tried it, this is the part of my code:

                      nrf_serial_uninit(&serial1_uarte);
                        *(volatile uint32_t *)0x40028FFC = 0;   // Power down UARTE1
                        *(volatile uint32_t *)0x40028FFC;       //
                        *(volatile uint32_t *)0x40028FFC = 1;   // Power on UARTE1 so it is ready

I tried too this:

nrf_serial_uninit(&serial1_uarte);
                      NRF_UARTE1->TASKS_STOPRX=1;
                      NRF_UARTE1->TASKS_STOPTX=1;
                      NRF_UARTE1->ENABLE=0;
                        *(volatile uint32_t *)0x40028FFC = 0;   // Power down UARTE1
                        *(volatile uint32_t *)0x40028FFC;       //
                        *(volatile uint32_t *)0x40028FFC = 1;   // Power on UARTE1 so it is ready

But it's not success, The consumption is the same.

In this moment I don't know what can I try...

Thank you in advance!

RE: HIGH CONSUMPTION UARTE1

Simonr — Tue, 09 Apr 2019 12:43:29 GMT

Hi Edward

What SDK are you using? There was an issue with UARTE not disabling properly in SDK v15.0.0 where the workaround posted here had to be implemented. This workaround should power cycle the peripheral after calling app_uart_close() and lower the current consumption. The workaround is thoroughly explained here if you have any initial questions.

If this doesn't solve your problem, don't hesitate to tell me!

Best regards,

Simon