Timer init returns Invalid Parameter nrF54L15 DK

Question

We just started a project to replace an old PAN1720 and decided to use the nRF54L15 based module. So I am just getting started with the VS code and zephry enviroment using SDK v3.1.
I got the blinky example working, but now trying to use one of the timers to count edges on a port pin. Having issues with below code. The code compiles and flashes to the nrF54L15-DK board, but I get the below message from my jlink terminal when the init timer is called. Just starting out very basic to see if I can init a timer. I tried Timer 20 and timer 23 and both give the same result. I assume the function I am using is sending the wrong setup to the timer or the timer is not initialized. Any help would be appreciated.

Putty output from Jlink com port
*** Booting nRF Connect SDK v3.1.0-6c6e5b32496e ***
*** Using Zephyr OS v4.1.99-1612683d4010 ***
STEP: test timer init
nrfx_timer_init failed: 195887108

below is my main.c
I have tried different frequencies and interrupt priorities, but get the same results.
If I try setting it to 16MHz I get divide by zero errors.

I also show my other file contents as well below. These files have alot of left over stuff from hours of trying to get this to work.

#include <zephyr/kernel.h>
#include <nrfx_timer.h>

static const nrfx_timer_t my_timer = NRFX_TIMER_INSTANCE(20);

void main(void)
{
    printk("STEP: test timer init\n");

    nrfx_timer_config_t tcfg = {
        .frequency = NRF_TIMER_FREQ_2MHz,   // 1 MHz base clock
        .mode      = NRF_TIMER_MODE_TIMER,
        .bit_width = NRF_TIMER_BIT_WIDTH_32,
        .interrupt_priority = 6,
        .p_context = NULL,
    };

    nrfx_err_t err = nrfx_timer_init(&my_timer, &tcfg, NULL);
    if (err != NRFX_SUCCESS) {
        printk("nrfx_timer_init failed: %d\n", err);
        return;
    }

    nrfx_timer_enable(&my_timer);

    while (1) {
        k_msleep(500);
        printk("Timer running...\n");
    }
}

Overlay file

/ {
    aliases {
        rip-in = &rip_in0;
    };

    rip_in0: rip_in0 {
        status = "okay";
    };
};

/* Put phandle patches at top-level, not inside '/' */
&timer20 {
    status = "okay";
};

&gpiote30 {
    status = "okay";
};

/* Enable if you actually use DPPI later
&dppic00 {
    status = "okay";
};
*/

# Console over UART
CONFIG_PRINTK=y
CONFIG_CONSOLE=y
CONFIG_SERIAL=y
CONFIG_UART_CONSOLE=y

#Enable Float formating
CONFIG_CBPRINTF_FP_SUPPORT=y

# Logging over UART (optional but nice)
CONFIG_LOG=y
CONFIG_LOG_PRINTK=y
CONFIG_LOG_BACKEND_UART=y
# CONFIG_LOG_BACKEND_RTT is disabled below

# Make sure RTT isn’t used for console/logs
CONFIG_USE_SEGGER_RTT=n
CONFIG_RTT_CONSOLE=n
CONFIG_LOG_BACKEND_RTT=n

# GPIO driver (this is the only one you need to set explicitly)
CONFIG_GPIO=y


CONFIG_NRFX_GPIOTE30=y     # GPIOTE instance 30 on nRF54L05 (cpuapp)
CONFIG_NRFX_TIMER20=y      # TIMER instance 20

# "no prompt" warning, just delete this line)
#CONFIG_NRFX_DPPI=y

Vidar Berg · Accepted Answer

Hello, 
 The timer init function is returning "NRFX_ERROR_INVALID_PARAM" (195887108 / 0x0BAD0004), most likely due to the .frequency value. The NRF_TIMER_FREQ_* enum specifies the prescaler value, while the driver expects the frequency in hertz. Please replace the line " .frequency = NRF_TIMER_FREQ_2MHz," with ".frequency = NRFX_MHZ_TO_HZ(2UL)," 
 
 Best regards, 
 Vidar

Timer init returns Invalid Parameter nrF54L15 DK

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