/** * Copyright (c) 2020 Raspberry Pi (Trading) Ltd. * * SPDX-License-Identifier: BSD-3-Clause */ #include "pico/stdlib.h" #include "pico/binary_info.h" #ifdef CYW43_WL_GPIO_LED_PIN #include "pico/cyw43_arch.h" #endif // Set an LED_TYPE variable - 0 is default, 1 is connected to WIFI chip // Note that LED_TYPE == 1 is only supported when initially compiled for // a board with PICO_CYW43_SUPPORTED (eg pico_w), else the required // libraries won't be present bi_decl(bi_program_feature_group(0x1111, 0, "LED Configuration")); #if defined(PICO_DEFAULT_LED_PIN) // the tag and id are not important as picotool filters based on the // variable name, so just set them to 0 bi_decl(bi_ptr_int32(0x1111, 0, LED_TYPE, 0)); bi_decl(bi_ptr_int32(0x1111, 0, LED_PIN, PICO_DEFAULT_LED_PIN)); #elif defined(CYW43_WL_GPIO_LED_PIN) bi_decl(bi_ptr_int32(0x1111, 0, LED_TYPE, 1)); bi_decl(bi_ptr_int32(0x1111, 0, LED_PIN, CYW43_WL_GPIO_LED_PIN)); #else bi_decl(bi_ptr_int32(0x1111, 0, LED_TYPE, 0)); bi_decl(bi_ptr_int32(0x1111, 0, LED_PIN, 25)); #endif #ifndef LED_DELAY_MS #define LED_DELAY_MS 250 #endif // Perform initialisation int pico_led_init(void) { if (LED_TYPE == 0) { // A device like Pico that uses a GPIO for the LED so we can // use normal GPIO functionality to turn the led on and off gpio_init(LED_PIN); gpio_set_dir(LED_PIN, GPIO_OUT); return PICO_OK; #ifdef CYW43_WL_GPIO_LED_PIN } else if (LED_TYPE == 1) { // For Pico W devices we need to initialise the driver etc return cyw43_arch_init(); #endif } else { return PICO_ERROR_INVALID_DATA; } } // Turn the led on or off void pico_set_led(bool led_on) { if (LED_TYPE == 0) { // Just set the GPIO on or off gpio_put(LED_PIN, led_on); #ifdef CYW43_WL_GPIO_LED_PIN } else if (LED_TYPE == 1) { // Ask the wifi "driver" to set the GPIO on or off cyw43_arch_gpio_put(LED_PIN, led_on); #endif } } int main() { int rc = pico_led_init(); hard_assert(rc == PICO_OK); while (true) { pico_set_led(true); sleep_ms(LED_DELAY_MS); pico_set_led(false); sleep_ms(LED_DELAY_MS); } }

This firmware image was imported from the pico-examples repository. 


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