RE: Power consumption on UART

nordicator_prim3 — Tue, 17 Sep 2024 19:25:11 GMT
This fixed a bug for me as well, thanks for the code example!
I would love to know why the double-suspend is needed, I'll take a look at the driver.
RE: Power consumption on UART

Syl20D — Tue, 17 Sep 2024 09:11:57 GMT
For suspend:
NRF_UARTE1->RXD.MAXCNT = 0;
pm_device_action_run(modem_uart, PM_DEVICE_ACTION_SUSPEND);
pm_device_action_run(modem_uart,PM_DEVICE_ACTION_RESUME);
NRF_UARTE1->RXD.MAXCNT = 0;
pm_device_action_run(modem_uart, PM_DEVICE_ACTION_SUSPEND);
For resume:
pm_device_action_run(modem_uart, PM_DEVICE_ACTION_RESUME);
NRF_UARTE1->RXD.MAXCNT = 1;
The double suspend is needed to have the drop in the power consumption
RE: Power consumption on UART

Susheel Nuguru — Fri, 13 Sep 2024 10:36:32 GMT
[quote user="Syl20D"]I've succeed to have the desired power consumption when I reset the RXD EasyDMA register.[/quote]
can you show me some code snippets on how you did that?
RE: Power consumption on UART

Syl20D — Thu, 12 Sep 2024 09:44:36 GMT
I've succeed to have the desired power consumption when I reset the RXD EasyDMA register.
Can the DMA force the input connexion buffer?
RE: Power consumption on UART

Susheel Nuguru — Wed, 11 Sep 2024 12:25:59 GMT
No, we do not seem to support it. The workaround is to implement it in the driver. Will be a feature request.
RE: Power consumption on UART

Syl20D — Wed, 11 Sep 2024 11:33:21 GMT
Ok, did you have a workaround to disable rx or uart dynamically?
RE: Power consumption on UART

Susheel Nuguru — Mon, 09 Sep 2024 12:30:27 GMT
Hmm,
Looking at the driver file zephyr\drivers\serial\uart_nrfx_uart.c, it looks like it has implemented the support for disable_rx but nothing for low_power_enable. You can see that the low-power-enable is not even extracted from the device node.
So in short, I think it looks like low-power-enable is not yet supported in nRF driver.
RE: Power consumption on UART

Syl20D — Mon, 09 Sep 2024 11:07:58 GMT
Rx is on Uart Tx of the modem and TX is on Uart Rx.
I don't understand why disable-rx option has a different power consumption than low-power enable.
Find my zephyr.dts below, thanks
/dts-v1/;

/ {
    #address-cells = < 0x1 >;
    #size-cells = < 0x1 >;
    model = "Custom Plank Board";
    compatible = "vendor,custom-plank";
    chosen {
        zephyr,entropy = &cryptocell;
        zephyr,flash-controller = &flash_controller;
        zephyr,console = &cdc_acm_uart0;
        zephyr,sram = &sram0;
        zephyr,flash = &flash0;
        zephyr,user = &gpio0;
        zephyr,shell-uart = &cdc_acm_uart0;
        zephyr,uart-mcumgr = &cdc_acm_uart0;
        zephyr,code_partition = &slot0_partition;
    };
    aliases {
        pwm-led0 = &pwm_led0;
        modem = &modem;
        gnss = &gnss;
        lte = &lte;
    };
    soc {
        #address-cells = < 0x1 >;
        #size-cells = < 0x1 >;
        compatible = "nordic,nrf52840-qiaa", "nordic,nrf52840", "nordic,nrf52", "simple-bus";
        interrupt-parent = < &nvic >;
        ranges;
        nvic: interrupt-controller@e000e100 {
            #address-cells = < 0x1 >;
            compatible = "arm,v7m-nvic";
            reg = < 0xe000e100 0xc00 >;
            interrupt-controller;
            #interrupt-cells = < 0x2 >;
            arm,num-irq-priority-bits = < 0x3 >;
            phandle = < 0x1 >;
        };
        systick: timer@e000e010 {
            compatible = "arm,armv7m-systick";
            reg = < 0xe000e010 0x10 >;
            status = "disabled";
        };
        ficr: ficr@10000000 {
            compatible = "nordic,nrf-ficr";
            reg = < 0x10000000 0x1000 >;
            #nordic,ficr-cells = < 0x1 >;
            status = "okay";
        };
        uicr: uicr@10001000 {
            compatible = "nordic,nrf-uicr";
            reg = < 0x10001000 0x1000 >;
            status = "disabled";
        };
        sram0: memory@20000000 {
            compatible = "mmio-sram";
            reg = < 0x20000000 0x40000 >;
        };
        clock: clock@40000000 {
            compatible = "nordic,nrf-clock";
            reg = < 0x40000000 0x1000 >;
            interrupts = < 0x0 0x1 >;
            status = "okay";
        };
        power: power@40000000 {
            compatible = "nordic,nrf-power";
            reg = < 0x40000000 0x1000 >;
            interrupts = < 0x0 0x1 >;
            status = "okay";
            #address-cells = < 0x1 >;
            #size-cells = < 0x1 >;
            gpregret1: gpregret1@4000051c {
                #address-cells = < 0x1 >;
                #size-cells = < 0x1 >;
                compatible = "nordic,nrf-gpregret";
                reg = < 0x4000051c 0x1 >;
                status = "okay";
            };
            gpregret2: gpregret2@40000520 {
                #address-cells = < 0x1 >;
                #size-cells = < 0x1 >;
                compatible = "nordic,nrf-gpregret";
                reg = < 0x40000520 0x1 >;
                status = "okay";
            };
        };
        radio: radio@40001000 {
            compatible = "nordic,nrf-radio";
            reg = < 0x40001000 0x1000 >;
            interrupts = < 0x1 0x1 >;
            status = "okay";
            ieee802154-supported;
            ble-2mbps-supported;
            ble-coded-phy-supported;
            tx-high-power-supported;
            ieee802154: ieee802154 {
                compatible = "nordic,nrf-ieee802154";
                status = "disabled";
            };
        };
        uart0: uart@40002000 {
            compatible = "nordic,nrf-uarte";
            reg = < 0x40002000 0x1000 >;
            interrupts = < 0x2 0x1 >;
            status = "disabled";
            disable-rx;
        };
        i2c0: i2c@40003000 {
            compatible = "nordic,nrf-twi";
            #address-cells = < 0x1 >;
            #size-cells = < 0x0 >;
            reg = < 0x40003000 0x1000 >;
            clock-frequency = < 0x186a0 >;
            interrupts = < 0x3 0x1 >;
            easydma-maxcnt-bits = < 0x10 >;
            status = "okay";
            pinctrl-0 = < &i2c0_default >;
            pinctrl-1 = < &i2c0_sleep >;
            pinctrl-names = "default", "sleep";
            pca9420_pmic@61 {
                compatible = "zephyr,pca9420_pmic";
                reg = < 0x61 >;
            };
            lsm6ds0_detection@6a {
                compatible = "zephyr,lsm6ds0_detection";
                input-gpios = < &gpio1 0xf 0x0 >;
                reg = < 0x6a >;
            };
        };
        spi0: spi@40003000 {
            compatible = "nordic,nrf-spim";
            #address-cells = < 0x1 >;
            #size-cells = < 0x0 >;
            reg = < 0x40003000 0x1000 >;
            interrupts = < 0x3 0x1 >;
            max-frequency = < 0x7a1200 >;
            easydma-maxcnt-bits = < 0x10 >;
            status = "disabled";
        };
        i2c1: i2c@40004000 {
            compatible = "nordic,nrf-twim";
            #address-cells = < 0x1 >;
            #size-cells = < 0x0 >;
            reg = < 0x40004000 0x1000 >;
            clock-frequency = < 0x186a0 >;
            interrupts = < 0x4 0x1 >;
            easydma-maxcnt-bits = < 0x10 >;
            status = "disabled";
        };
        spi1: spi@40004000 {
            compatible = "nordic,nrf-spim";
            #address-cells = < 0x1 >;
            #size-cells = < 0x0 >;
            reg = < 0x40004000 0x1000 >;
            interrupts = < 0x4 0x1 >;
            max-frequency = < 0x7a1200 >;
            easydma-maxcnt-bits = < 0x10 >;
            status = "disabled";
        };
        nfct: nfct@40005000 {
            compatible = "nordic,nrf-nfct";
            reg = < 0x40005000 0x1000 >;
            interrupts = < 0x5 0x1 >;
            status = "disabled";
        };
        gpiote: gpiote0: gpiote@40006000 {
            compatible = "nordic,nrf-gpiote";
            reg = < 0x40006000 0x1000 >;
            interrupts = < 0x6 0x5 >;
            status = "okay";
            instance = < 0x0 >;
            phandle = < 0xa >;
        };
        adc: adc@40007000 {
            compatible = "nordic,nrf-saadc";
            reg = < 0x40007000 0x1000 >;
            interrupts = < 0x7 0x1 >;
            status = "disabled";
            #io-channel-cells = < 0x1 >;
        };
        timer0: timer@40008000 {
            compatible = "nordic,nrf-timer";
            status = "disabled";
            reg = < 0x40008000 0x1000 >;
            cc-num = < 0x4 >;
            max-bit-width = < 0x20 >;
            interrupts = < 0x8 0x1 >;
            prescaler = < 0x0 >;
        };
        timer1: timer@40009000 {
            compatible = "nordic,nrf-timer";
            status = "disabled";
            reg = < 0x40009000 0x1000 >;
            cc-num = < 0x4 >;
            max-bit-width = < 0x20 >;
            interrupts = < 0x9 0x1 >;
            prescaler = < 0x0 >;
            phandle = < 0xb >;
        };
        timer2: timer@4000a000 {
            compatible = "nordic,nrf-timer";
            status = "disabled";
            reg = < 0x4000a000 0x1000 >;
            cc-num = < 0x4 >;
            max-bit-width = < 0x20 >;
            interrupts = < 0xa 0x1 >;
            prescaler = < 0x0 >;
        };
        rtc0: rtc@4000b000 {
            compatible = "nordic,nrf-rtc";
            reg = < 0x4000b000 0x1000 >;
            cc-num = < 0x3 >;
            interrupts = < 0xb 0x1 >;
            status = "disabled";
            clock-frequency = < 0x8000 >;
            prescaler = < 0x1 >;
        };
        temp: temp@4000c000 {
            compatible = "nordic,nrf-temp";
            reg = < 0x4000c000 0x1000 >;
            interrupts = < 0xc 0x1 >;
            status = "okay";
        };
        rng: random@4000d000 {
            compatible = "nordic,nrf-rng";
            reg = < 0x4000d000 0x1000 >;
            interrupts = < 0xd 0x1 >;
            status = "okay";
        };
        ecb: ecb@4000e000 {
            compatible = "nordic,nrf-ecb";
            reg = < 0x4000e000 0x1000 >;
            interrupts = < 0xe 0x1 >;
            status = "okay";
        };
        ccm: ccm@4000f000 {
            compatible = "nordic,nrf-ccm";
            reg = < 0x4000f000 0x1000 >;
            interrupts = < 0xf 0x1 >;
            length-field-length-8-bits;
            status = "okay";
        };
        wdt: wdt0: watchdog@40010000 {
            compatible = "nordic,nrf-wdt";
            reg = < 0x40010000 0x1000 >;
            interrupts = < 0x10 0x1 >;
            status = "okay";
        };
        rtc1: rtc@40011000 {
            compatible = "nordic,nrf-rtc";
            reg = < 0x40011000 0x1000 >;
            cc-num = < 0x4 >;
            interrupts = < 0x11 0x1 >;
            status = "disabled";
            clock-frequency = < 0x8000 >;
            prescaler = < 0x1 >;
        };
        qdec: qdec0: qdec@40012000 {
            compatible = "nordic,nrf-qdec";
            reg = < 0x40012000 0x1000 >;
            interrupts = < 0x12 0x1 >;
            status = "disabled";
        };
        comp: comparator@40013000 {
            compatible = "nordic,nrf-comp";
            reg = < 0x40013000 0x1000 >;
            interrupts = < 0x13 0x1 >;
            status = "disabled";
            #io-channel-cells = < 0x1 >;
        };
        egu0: swi0: egu@40014000 {
            compatible = "nordic,nrf-egu", "nordic,nrf-swi";
            reg = < 0x40014000 0x1000 >;
            interrupts = < 0x14 0x1 >;
            status = "okay";
        };
        egu1: swi1: egu@40015000 {
            compatible = "nordic,nrf-egu", "nordic,nrf-swi";
            reg = < 0x40015000 0x1000 >;
            interrupts = < 0x15 0x1 >;
            status = "okay";
        };
        egu2: swi2: egu@40016000 {
            compatible = "nordic,nrf-egu", "nordic,nrf-swi";
            reg = < 0x40016000 0x1000 >;
            interrupts = < 0x16 0x1 >;
            status = "okay";
        };
        egu3: swi3: egu@40017000 {
            compatible = "nordic,nrf-egu", "nordic,nrf-swi";
            reg = < 0x40017000 0x1000 >;
            interrupts = < 0x17 0x1 >;
            status = "okay";
        };
        egu4: swi4: egu@40018000 {
            compatible = "nordic,nrf-egu", "nordic,nrf-swi";
            reg = < 0x40018000 0x1000 >;
            interrupts = < 0x18 0x1 >;
            status = "okay";
        };
        egu5: swi5: egu@40019000 {
            compatible = "nordic,nrf-egu", "nordic,nrf-swi";
            reg = < 0x40019000 0x1000 >;
            interrupts = < 0x19 0x1 >;
            status = "okay";
        };
        timer3: timer@4001a000 {
            compatible = "nordic,nrf-timer";
            status = "disabled";
            reg = < 0x4001a000 0x1000 >;
            cc-num = < 0x6 >;
            max-bit-width = < 0x20 >;
            interrupts = < 0x1a 0x1 >;
            prescaler = < 0x0 >;
        };
        timer4: timer@4001b000 {
            compatible = "nordic,nrf-timer";
            status = "disabled";
            reg = < 0x4001b000 0x1000 >;
            cc-num = < 0x6 >;
            max-bit-width = < 0x20 >;
            interrupts = < 0x1b 0x1 >;
            prescaler = < 0x0 >;
        };
        pwm0: pwm@4001c000 {
            compatible = "nordic,nrf-pwm";
            reg = < 0x4001c000 0x1000 >;
            interrupts = < 0x1c 0x1 >;
            status = "okay";
            #pwm-cells = < 0x3 >;
            pinctrl-0 = < &pwm0_default >;
            pinctrl-1 = < &pwm0_sleep >;
            pinctrl-names = "default", "sleep";
            phandle = < 0xc >;
        };
        pdm0: pdm@4001d000 {
            compatible = "nordic,nrf-pdm";
            reg = < 0x4001d000 0x1000 >;
            interrupts = < 0x1d 0x1 >;
            status = "disabled";
        };
        acl: acl@4001e000 {
            compatible = "nordic,nrf-acl";
            reg = < 0x4001e000 0x1000 >;
            status = "okay";
        };
        flash_controller: flash-controller@4001e000 {
            compatible = "nordic,nrf52-flash-controller";
            reg = < 0x4001e000 0x1000 >;
            partial-erase;
            #address-cells = < 0x1 >;
            #size-cells = < 0x1 >;
            flash0: flash@0 {
                compatible = "soc-nv-flash";
                erase-block-size = < 0x1000 >;
                write-block-size = < 0x4 >;
                reg = < 0x0 0x100000 >;
                partitions {
                    compatible = "fixed-partitions";
                    #address-cells = < 0x1 >;
                    #size-cells = < 0x1 >;
                    boot_partition: partition@0 {
                        label = "mcuboot";
                        reg = < 0x0 0xc000 >;
                    };
                    slot0_partition: partition@c000 {
                        label = "image-0";
                        reg = < 0xc000 0x76000 >;
                    };
                    slot1_partition: partition@82000 {
                        label = "image-1";
                        reg = < 0x82000 0x76000 >;
                    };
                    storage_partition: partition@f8000 {
                        label = "storage";
                        reg = < 0xf8000 0x4000 >;
                    };
                };
            };
        };
        ppi: ppi@4001f000 {
            compatible = "nordic,nrf-ppi";
            reg = < 0x4001f000 0x1000 >;
            status = "okay";
        };
        mwu: mwu@40020000 {
            compatible = "nordic,nrf-mwu";
            reg = < 0x40020000 0x1000 >;
            status = "okay";
        };
        pwm1: pwm@40021000 {
            compatible = "nordic,nrf-pwm";
            reg = < 0x40021000 0x1000 >;
            interrupts = < 0x21 0x1 >;
            status = "disabled";
            #pwm-cells = < 0x3 >;
        };
        pwm2: pwm@40022000 {
            compatible = "nordic,nrf-pwm";
            reg = < 0x40022000 0x1000 >;
            interrupts = < 0x22 0x1 >;
            status = "disabled";
            #pwm-cells = < 0x3 >;
        };
        spi2: spi@40023000 {
            compatible = "nordic,nrf-spim";
            #address-cells = < 0x1 >;
            #size-cells = < 0x0 >;
            reg = < 0x40023000 0x1000 >;
            interrupts = < 0x23 0x1 >;
            max-frequency = < 0x7a1200 >;
            easydma-maxcnt-bits = < 0x10 >;
            status = "disabled";
        };
        rtc2: rtc@40024000 {
            compatible = "nordic,nrf-rtc";
            reg = < 0x40024000 0x1000 >;
            cc-num = < 0x4 >;
            interrupts = < 0x24 0x1 >;
            status = "disabled";
            clock-frequency = < 0x8000 >;
            prescaler = < 0x1 >;
        };
        i2s0: i2s@40025000 {
            compatible = "nordic,nrf-i2s";
            #address-cells = < 0x1 >;
            #size-cells = < 0x0 >;
            reg = < 0x40025000 0x1000 >;
            interrupts = < 0x25 0x1 >;
            status = "disabled";
        };
        usbd: zephyr_udc0: usbd@40027000 {
            compatible = "nordic,nrf-usbd";
            reg = < 0x40027000 0x1000 >;
            interrupts = < 0x27 0x1 >;
            num-bidir-endpoints = < 0x1 >;
            num-in-endpoints = < 0x7 >;
            num-out-endpoints = < 0x7 >;
            num-isoin-endpoints = < 0x1 >;
            num-isoout-endpoints = < 0x1 >;
            status = "okay";
            cdc_acm_uart0: cdc_acm_uart0 {
                compatible = "zephyr,cdc-acm-uart";
                current-speed = < 0x38400 >;
            };
        };
        uart1: uart@40028000 {
            compatible = "nordic,nrf-uarte";
            reg = < 0x40028000 0x1000 >;
            interrupts = < 0x28 0x1 >;
            status = "okay";
            current-speed = < 0x1c200 >;
            pinctrl-0 = < &uart1_default >;
            pinctrl-1 = < &uart1_sleep >;
            pinctrl-names = "default", "sleep";
            modem: modem {
                compatible = "quectel,bg600";
                mdm-power-gpios = < &gpio0 0x2 0x0 >;
                mdm-status-gpios = < &gpio1 0xd 0x0 >;
                mdm-dtr-gpios = < &gpio1 0x1 0x0 >;
                status = "okay";
                gnss: gnss {
                    compatible = "quectel,bg600-gnss";
                    status = "okay";
                };
                lte: lte {
                    compatible = "quectel,bg600-lte";
                    status = "okay";
                };
            };
        };
        qspi: qspi@40029000 {
            compatible = "nordic,nrf-qspi";
            #address-cells = < 0x1 >;
            #size-cells = < 0x0 >;
            reg = < 0x40029000 0x1000 >, < 0x12000000 0x8000000 >;
            reg-names = "qspi", "qspi_mm";
            interrupts = < 0x29 0x1 >;
            status = "disabled";
        };
        pwm3: pwm@4002d000 {
            compatible = "nordic,nrf-pwm";
            reg = < 0x4002d000 0x1000 >;
            interrupts = < 0x2d 0x1 >;
            status = "disabled";
            #pwm-cells = < 0x3 >;
        };
        spi3: spi@4002f000 {
            compatible = "nordic,nrf-spim";
            #address-cells = < 0x1 >;
            #size-cells = < 0x0 >;
            reg = < 0x4002f000 0x1000 >;
            interrupts = < 0x2f 0x1 >;
            max-frequency = < 0x1e84800 >;
            easydma-maxcnt-bits = < 0x10 >;
            rx-delay-supported;
            rx-delay = < 0x2 >;
            status = "disabled";
        };
        gpio0: gpio@50000000 {
            compatible = "nordic,nrf-gpio";
            gpio-controller;
            reg = < 0x50000000 0x200 0x50000500 0x300 >;
            #gpio-cells = < 0x2 >;
            status = "okay";
            port = < 0x0 >;
            gpiote-instance = < &gpiote >;
            phandle = < 0x9 >;
        };
        gpio1: gpio@50000300 {
            compatible = "nordic,nrf-gpio";
            gpio-controller;
            reg = < 0x50000300 0x200 0x50000800 0x300 >;
            #gpio-cells = < 0x2 >;
            ngpios = < 0x10 >;
            status = "okay";
            port = < 0x1 >;
            gpiote-instance = < &gpiote >;
            phandle = < 0x4 >;
        };
        cryptocell: crypto@5002a000 {
            compatible = "nordic,cryptocell", "arm,cryptocell-310";
            reg = < 0x5002a000 0x1000 >, < 0x5002b000 0x1000 >;
            reg-names = "wrapper", "core";
            interrupts = < 0x2a 0x1 >;
            status = "okay";
        };
    };
    pinctrl: pin-controller {
        compatible = "nordic,nrf-pinctrl";
        i2c0_default: i2c0_default {
            phandle = < 0x2 >;
            group1 {
                psels = < 0x16002b >, < 0x18002a >;
                bias-pull-up;
            };
        };
        i2c0_sleep: i2c0_sleep {
            phandle = < 0x3 >;
            group1 {
                psels = < 0x16002b >, < 0x18002a >;
            };
        };
        uart0_default: uart0_default {
            group1 {
                psels = < 0x4 >, < 0x401ff >;
            };
            group2 {
                psels = < 0x2001a >, < 0x601ff >;
            };
        };
        uart1_default: uart1_default {
            phandle = < 0x7 >;
            group1 {
                psels = < 0x27 >, < 0x20024 >, < 0x401ff >, < 0x601ff >;
            };
        };
        uart1_sleep: uart1_sleep {
            phandle = < 0x8 >;
            group1 {
                psels = < 0x27 >, < 0x20024 >;
                low-power-enable;
                bias-disable;
            };
        };
        pwm0_default: pwm0_default {
            phandle = < 0x5 >;
            group1 {
                psels = < 0x2c0023 >;
            };
        };
        pwm0_sleep: pwm0_sleep {
            phandle = < 0x6 >;
            group1 {
                psels = < 0x2c0023 >;
                low-power-enable;
            };
        };
    };
    rng_hci: entropy_bt_hci {
        compatible = "zephyr,bt-hci-entropy";
        status = "okay";
    };
    sw_pwm: sw-pwm {
        compatible = "nordic,nrf-sw-pwm";
        status = "disabled";
        generator = < &timer1 >;
        clock-prescaler = < 0x0 >;
        #pwm-cells = < 0x3 >;
    };
    cpus {
        #address-cells = < 0x1 >;
        #size-cells = < 0x0 >;
        cpu@0 {
            device_type = "cpu";
            compatible = "arm,cortex-m4f";
            reg = < 0x0 >;
            #address-cells = < 0x1 >;
            #size-cells = < 0x1 >;
            itm: itm@e0000000 {
                compatible = "arm,armv7m-itm";
                reg = < 0xe0000000 0x1000 >;
                swo-ref-frequency = < 0x1e84800 >;
            };
        };
    };
    zephyr,user {
        usb-gpios = < &gpio1 0x9 0x11 >;
    };
    pwmleds {
        compatible = "pwm-leds";
        pwm_led0: pwm_led_0 {
            pwms = < &pwm0 0x0 0x1312d00 0x0 >;
        };
    };
};
RE: Power consumption on UART

Susheel Nuguru — Mon, 09 Sep 2024 07:27:27 GMT
Hi Sylvain,
[quote user=""]
If I put the uart on the modem pin.
Current is 500µA on suspend, 1.5mA on resume.
[/quote]
Which modem pin are you using? Are you sure that P1.04 is not used for anything else?
Can you post me your zephyr.dts file from your build\zephyr folder?