Hi All,
I am unsuccessfully trying to make the buzzer (KLJ-5020) of my custom board with an nrf9160 beep. I have setup the different dts and config files of my custom board by following this tutorial.
I tried different samples including blinky_pwm and this tutorial. The buzzer is connected to the GPIO5 pin, I use VS code and SDK 2.4.1. I use a 3.7V 1000mah battery.
I only have a multimeter for checking the hardware although I am not sure what to check on the buzzer pins, I am a complete beginner in electronic and did not design the board myself.
On the software side I use pwm on GPIO5 to drive the buzzer with a 1000Hz signal (I just want a simple beep). I saw here that GPIO5 on the nrf9160 is a MISO pin, could that be the issue?
I can't tell what is wrong. Any help would be greatly appreciated.
Best wishes
Schematic:
nrf9160vs_nrf9160.overlay
/*
* Copyright (c) 2019, Nordic Semiconductor ASA
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <zephyr/dt-bindings/led/led.h>
#include "nrf52-bindings.h"
&arduino_spi { /* MOSI on D11 / P0.23 */
compatible = "nordic,nrf-spim";
led_strip: ws2812@0 {
compatible = "worldsemi,ws2812-spi";
/* SPI */
reg = <0>; /* ignored, but necessary for SPI bindings */
spi-max-frequency = <SPI_FREQ>;
/* WS2812 */
chain-length = <1>; /* arbitrary; change at will */
color-mapping = <LED_COLOR_ID_GREEN
LED_COLOR_ID_RED
LED_COLOR_ID_BLUE>;
spi-one-frame = <ONE_FRAME>;
spi-zero-frame = <ZERO_FRAME>;
};
};
/ {
aliases {
led-strip = &led_strip;
buzzer-pwm = &buzzer;
};
pmwbuzzer {
compatible = "pwm-leds";
status = "okay";
buzzer: buzzer_pwm{
pwms = < &pwm1 0 PWM_HZ(880) PWM_POLARITY_NORMAL>;
label = "PMW_1";
};
};
};
/* PWM1 is intended for buzzer control */
&pwm1 {
status = "okay";
pinctrl-0 = <&pwm1_default>;
pinctrl-1 = <&pwm1_sleep>;
pinctrl-names = "default", "sleep";
};
&pinctrl {
pwm1_default: pwm1_default {
group1 {
psels = <NRF_PSEL(PWM_OUT0, 0, 5)>;
};
};
pwm1_sleep: pwm1_sleep {
group1 {
psels = <NRF_PSEL(PWM_OUT0, 0, 5)>;
low-power-enable;
};
};
};
main.c
/*
* Copyright (c) 2017 Linaro Limited
* Copyright (c) 2018 Intel Corporation
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <errno.h>
#include <string.h>
#define LOG_LEVEL 4
#include <zephyr/logging/log.h>
LOG_MODULE_REGISTER(main);
#include <zephyr/kernel.h>
#include <zephyr/drivers/led_strip.h>
#include <zephyr/drivers/pwm.h>
#define STRIP_NODE DT_ALIAS(led_strip)
#define STRIP_NUM_PIXELS DT_PROP(DT_ALIAS(led_strip), chain_length)
#define DELAY_TIME K_MSEC(10000)
#define RGB(_r, _g, _b) { .r = (_r), .g = (_g), .b = (_b) }
static const struct led_rgb colors[] = {
RGB(0x0f, 0x00, 0x00), /* red */
RGB(0x00, 0x0f, 0x00), /* green */
RGB(0x00, 0x00, 0x0f), /* blue */
RGB(0x0f, 0x0f, 0x0f), /* white */
};
struct led_rgb pixels[STRIP_NUM_PIXELS];
static const struct device *const strip = DEVICE_DT_GET(STRIP_NODE);
const struct pwm_dt_spec buzzer = PWM_DT_SPEC_GET(DT_ALIAS(buzzer_pwm));
int main(void)
{
LOG_INF("Starting test...");
if (!device_is_ready(buzzer.dev))
{
LOG_ERR("Buzeer not ready");
}
LOG_DBG("beep");
pwm_set_dt(&buzzer, PWM_HZ(1000), PWM_HZ(1000) / 2);
k_msleep(10000);
size_t cursor = 0, color = 0;
int rc;
if (device_is_ready(strip)) {
LOG_INF("Found LED strip device %s", strip->name);
} else {
LOG_ERR("LED strip device %s is not ready", strip->name);
return 0;
}
LOG_INF("Displaying pattern on strip");
while (1) {
memset(&pixels, 0x00, sizeof(pixels));
memcpy(&pixels[cursor], &colors[color], sizeof(struct led_rgb));
rc = led_strip_update_rgb(strip, pixels, STRIP_NUM_PIXELS);
if (rc) {
LOG_ERR("couldn't update strip: %d", rc);
}
cursor++;
if (cursor >= STRIP_NUM_PIXELS) {
cursor = 0;
color++;
if (color == ARRAY_SIZE(colors)) {
color = 0;
}
}
k_sleep(DELAY_TIME);
//play_beep_once();
}
return 0;
}
prj.conf
# Stacks and heaps
CONFIG_MAIN_STACK_SIZE=3072
CONFIG_HEAP_MEM_POOL_SIZE=16384
CONFIG_USE_SEGGER_RTT=y
CONFIG_RTT_CONSOLE=y
CONFIG_STDOUT_CONSOLE=y
CONFIG_PRINTK=y
CONFIG_PWM=y
CONFIG_LOG=y
CONFIG_LOG_PRINTK=y
CONFIG_LOG_MODE_IMMEDIATE=y
CONFIG_PWM_LOG_LEVEL_DBG=y
CONFIG_LED_STRIP=y
CONFIG_LED_STRIP_LOG_LEVEL_DBG=y
CONFIG_WS2812_STRIP=y
CONFIG_WS2812_STRIP_SPI=y
CONFIG_NEWLIB_LIBC=y
CONFIG_DK_LIBRARY=y
CONFIG_PWM_NRFX=y
sources:
logs:
