| /* |
| * Copyright (c) 2019 Nordic Semiconductor ASA |
| * |
| * SPDX-License-Identifier: Apache-2.0 |
| */ |
| |
| #include <zephyr/kernel.h> |
| |
| #include <nrfx_gpiote.h> |
| #include <helpers/nrfx_gppi.h> |
| |
| #include <zephyr/logging/log.h> |
| #include <zephyr/irq.h> |
| LOG_MODULE_REGISTER(nrfx_sample, LOG_LEVEL_INF); |
| |
| #define INPUT_PIN NRF_DT_GPIOS_TO_PSEL(DT_ALIAS(sw0), gpios) |
| #define OUTPUT_PIN NRF_DT_GPIOS_TO_PSEL(DT_ALIAS(led0), gpios) |
| |
| #define GPIOTE_INST NRF_DT_GPIOTE_INST(DT_ALIAS(sw0), gpios) |
| #define GPIOTE_NODE DT_NODELABEL(_CONCAT(gpiote, GPIOTE_INST)) |
| |
| BUILD_ASSERT(NRF_DT_GPIOTE_INST(DT_ALIAS(led0), gpios) == GPIOTE_INST, |
| "Both sw0 and led0 GPIOs must use the same GPIOTE instance"); |
| BUILD_ASSERT(IS_ENABLED(_CONCAT(CONFIG_, _CONCAT(NRFX_GPIOTE, GPIOTE_INST))), |
| "NRFX_GPIOTE" STRINGIFY(GPIOTE_INST) " must be enabled in Kconfig"); |
| |
| |
| static void button_handler(nrfx_gpiote_pin_t pin, |
| nrfx_gpiote_trigger_t trigger, |
| void *context) |
| { |
| LOG_INF("GPIO input event callback"); |
| } |
| |
| int main(void) |
| { |
| LOG_INF("nrfx_gpiote sample on %s", CONFIG_BOARD); |
| |
| nrfx_err_t err; |
| uint8_t in_channel, out_channel; |
| uint8_t ppi_channel; |
| const nrfx_gpiote_t gpiote = NRFX_GPIOTE_INSTANCE(GPIOTE_INST); |
| |
| /* Connect GPIOTE instance IRQ to irq handler */ |
| IRQ_CONNECT(DT_IRQN(GPIOTE_NODE), DT_IRQ(GPIOTE_NODE, priority), nrfx_isr, |
| NRFX_CONCAT(nrfx_gpiote_, GPIOTE_INST, _irq_handler), 0); |
| |
| /* Initialize GPIOTE (the interrupt priority passed as the parameter |
| * here is ignored, see nrfx_glue.h). |
| */ |
| err = nrfx_gpiote_init(&gpiote, 0); |
| if (err != NRFX_SUCCESS) { |
| LOG_ERR("nrfx_gpiote_init error: 0x%08X", err); |
| return 0; |
| } |
| |
| err = nrfx_gpiote_channel_alloc(&gpiote, &in_channel); |
| if (err != NRFX_SUCCESS) { |
| LOG_ERR("Failed to allocate in_channel, error: 0x%08X", err); |
| return 0; |
| } |
| |
| err = nrfx_gpiote_channel_alloc(&gpiote, &out_channel); |
| if (err != NRFX_SUCCESS) { |
| LOG_ERR("Failed to allocate out_channel, error: 0x%08X", err); |
| return 0; |
| } |
| |
| /* Initialize input pin to generate event on high to low transition |
| * (falling edge) and call button_handler() |
| */ |
| static const nrf_gpio_pin_pull_t pull_config = NRF_GPIO_PIN_PULLUP; |
| nrfx_gpiote_trigger_config_t trigger_config = { |
| .trigger = NRFX_GPIOTE_TRIGGER_HITOLO, |
| .p_in_channel = &in_channel, |
| }; |
| static const nrfx_gpiote_handler_config_t handler_config = { |
| .handler = button_handler, |
| }; |
| nrfx_gpiote_input_pin_config_t input_config = { |
| .p_pull_config = &pull_config, |
| .p_trigger_config = &trigger_config, |
| .p_handler_config = &handler_config |
| }; |
| |
| err = nrfx_gpiote_input_configure(&gpiote, INPUT_PIN, &input_config); |
| |
| if (err != NRFX_SUCCESS) { |
| LOG_ERR("nrfx_gpiote_input_configure error: 0x%08X", err); |
| return 0; |
| } |
| |
| /* Initialize output pin. SET task will turn the LED on, |
| * CLR will turn it off and OUT will toggle it. |
| */ |
| static const nrfx_gpiote_output_config_t output_config = { |
| .drive = NRF_GPIO_PIN_S0S1, |
| .input_connect = NRF_GPIO_PIN_INPUT_DISCONNECT, |
| .pull = NRF_GPIO_PIN_NOPULL, |
| }; |
| const nrfx_gpiote_task_config_t task_config = { |
| .task_ch = out_channel, |
| .polarity = NRF_GPIOTE_POLARITY_TOGGLE, |
| .init_val = 1, |
| }; |
| err = nrfx_gpiote_output_configure(&gpiote, OUTPUT_PIN, |
| &output_config, |
| &task_config); |
| if (err != NRFX_SUCCESS) { |
| LOG_ERR("nrfx_gpiote_output_configure error: 0x%08X", err); |
| return 0; |
| } |
| |
| nrfx_gpiote_trigger_enable(&gpiote, INPUT_PIN, true); |
| nrfx_gpiote_out_task_enable(&gpiote, OUTPUT_PIN); |
| |
| LOG_INF("nrfx_gpiote initialized"); |
| |
| /* Allocate a (D)PPI channel. */ |
| err = nrfx_gppi_channel_alloc(&ppi_channel); |
| if (err != NRFX_SUCCESS) { |
| LOG_ERR("nrfx_gppi_channel_alloc error: 0x%08X", err); |
| return 0; |
| } |
| |
| /* Configure endpoints of the channel so that the input pin event is |
| * connected with the output pin OUT task. This means that each time |
| * the button is pressed, the LED pin will be toggled. |
| */ |
| nrfx_gppi_channel_endpoints_setup(ppi_channel, |
| nrfx_gpiote_in_event_address_get(&gpiote, INPUT_PIN), |
| nrfx_gpiote_out_task_address_get(&gpiote, OUTPUT_PIN)); |
| |
| /* Enable the channel. */ |
| nrfx_gppi_channels_enable(BIT(ppi_channel)); |
| |
| LOG_INF("(D)PPI configured, leaving main()"); |
| return 0; |
| } |