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https://github.com/RIOT-OS/RIOT.git
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93 lines
2.4 KiB
C
93 lines
2.4 KiB
C
/*
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* Copyright (C) 2022 Otto-von-Guericke-Universität Magdeburg
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*
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* This file is subject to the terms and conditions of the GNU Lesser
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* General Public License v2.1. See the file LICENSE in the top level
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* directory for more details.
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*/
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#include "periph/gpio_ll.h"
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/* Optimizing for low stack usage by not using printf(), which on newlib is
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* prohibitively costly. This will allow developers to use this for debugging
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* even in ISR - hopefully without increasing the ISR stack size.
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*
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* If module fmt is used, there is a stack friendly print_str() provided.
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* Otherwise, fall back to fputs(), which is still way more stack friendly than
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* printf().
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*/
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#ifdef MODULE_FMT
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# include "fmt.h"
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#else
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# include <stdio.h>
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static inline void print_str(const char *str)
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{
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fputs(str, stdout);
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}
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#endif
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void gpio_ll_print_conf_common(const gpio_conf_t conf)
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{
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const char *off_on[] = { "off", "on" };
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print_str("state: ");
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switch (conf.state) {
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case GPIO_INPUT:
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print_str("in");
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break;
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case GPIO_OUTPUT_PUSH_PULL:
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print_str("out-pp");
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break;
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#if MODULE_PERIPH_GPIO_LL_OPEN_DRAIN
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case GPIO_OUTPUT_OPEN_DRAIN:
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print_str("out-od");
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break;
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#endif
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#if MODULE_PERIPH_GPIO_LL_OPEN_SOURCE
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case GPIO_OUTPUT_OPEN_SOURCE:
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print_str("out-os");
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break;
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#endif
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case GPIO_USED_BY_PERIPHERAL:
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print_str("periph");
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break;
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#if MODULE_PERIPH_GPIO_LL_DISCONNECT
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case GPIO_DISCONNECT:
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print_str("off");
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break;
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#endif
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default:
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print_str("?");
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break;
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}
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if (conf.state != GPIO_OUTPUT_PUSH_PULL) {
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print_str(", pull: ");
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switch (conf.pull) {
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default:
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case GPIO_FLOATING:
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print_str("none");
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break;
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case GPIO_PULL_UP:
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print_str("up");
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break;
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case GPIO_PULL_DOWN:
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print_str("down");
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break;
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case GPIO_PULL_KEEP:
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print_str("keep");
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break;
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}
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}
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print_str(", value: ");
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print_str(off_on[conf.initial_value]);
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}
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/* implement gpio_ll_print_conf as weak alias symbol for
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* gpio_ll_print_conf_common - so that platform specific implementations can
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* override gpio_ll_print_conf while reusing gpio_ll_print_conf_common()
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*/
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__attribute__((weak, alias("gpio_ll_print_conf_common")))
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void gpio_ll_print_conf(gpio_conf_t conf);
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