183 lines
6.3 KiB
C
183 lines
6.3 KiB
C
/*!
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\file gd32e230c_start.c
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\brief firmware functions to manage leds, keys, COM ports
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\version 2019-02-19, V1.0.0, firmware for GD32E23x
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*/
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/*
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Copyright (c) 2019, GigaDevice Semiconductor Inc.
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All rights reserved.
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Redistribution and use in source and binary forms, with or without modification,
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are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice, this
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list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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3. Neither the name of the copyright holder nor the names of its contributors
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may be used to endorse or promote products derived from this software without
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specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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OF SUCH DAMAGE.
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*/
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#include "gd32e230c_start.h"
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/* private variables */
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static const uint32_t GPIO_PORT[LEDn] = {LED1_GPIO_PORT,
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LED2_GPIO_PORT,
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LED3_GPIO_PORT,
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LED4_GPIO_PORT};
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static const uint32_t GPIO_PIN[LEDn] = {LED1_PIN,
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LED2_PIN,
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LED3_PIN,
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LED4_PIN};
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static const rcu_periph_enum GPIO_CLK[LEDn] = {LED1_GPIO_CLK,
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LED2_GPIO_CLK,
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LED3_GPIO_CLK,
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LED4_GPIO_CLK};
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static const uint32_t KEY_PORT[KEYn] = {WAKEUP_KEY_GPIO_PORT};
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static const uint32_t KEY_PIN[KEYn] = {WAKEUP_KEY_PIN};
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static const rcu_periph_enum KEY_CLK[KEYn] = {WAKEUP_KEY_GPIO_CLK};
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static const exti_line_enum KEY_EXTI_LINE[KEYn] = {WAKEUP_KEY_EXTI_LINE};
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static const uint8_t KEY_PORT_SOURCE[KEYn] = {WAKEUP_KEY_EXTI_PORT_SOURCE};
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static const uint8_t KEY_PIN_SOURCE[KEYn] = {WAKEUP_KEY_EXTI_PIN_SOURCE};
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static const uint8_t KEY_IRQn[KEYn] = {WAKEUP_KEY_EXTI_IRQn};
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/* eval board low layer private functions */
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/*!
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\brief configure led GPIO
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\param[in] lednum: specify the led to be configured
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\arg LED1
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\arg LED2
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\arg LED3
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\arg LED4
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\param[out] none
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\retval none
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*/
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void gd_eval_led_init(led_typedef_enum lednum)
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{
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/* enable the led clock */
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rcu_periph_clock_enable(GPIO_CLK[lednum]);
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/* configure led GPIO port */
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gpio_mode_set(GPIO_PORT[lednum], GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, GPIO_PIN[lednum]);
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gpio_output_options_set(GPIO_PORT[lednum], GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, GPIO_PIN[lednum]);
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GPIO_BC(GPIO_PORT[lednum]) = GPIO_PIN[lednum];
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}
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/*!
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\brief turn on selected led
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\param[in] lednum: specify the led to be turned on
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\arg LED1
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\arg LED2
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\arg LED3
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\arg LED4
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\param[out] none
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\retval none
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*/
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void gd_eval_led_on(led_typedef_enum lednum)
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{
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GPIO_BOP(GPIO_PORT[lednum]) = GPIO_PIN[lednum];
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}
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/*!
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\brief turn off selected led
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\param[in] lednum: specify the led to be turned off
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\arg LED1
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\arg LED2
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\arg LED3
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\arg LED4
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\param[out] none
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\retval none
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*/
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void gd_eval_led_off(led_typedef_enum lednum)
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{
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GPIO_BC(GPIO_PORT[lednum]) = GPIO_PIN[lednum];
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}
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/*!
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\brief toggle selected led
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\param[in] lednum: specify the led to be toggled
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\arg LED1
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\arg LED2
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\arg LED3
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\arg LED4
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\param[out] none
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\retval none
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*/
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void gd_eval_led_toggle(led_typedef_enum lednum)
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{
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GPIO_TG(GPIO_PORT[lednum]) = GPIO_PIN[lednum];
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}
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/*!
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\brief configure key
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\param[in] keynum: specify the key to be configured
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\arg KEY_TAMPER: tamper key
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\arg KEY_WAKEUP: wakeup key
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\arg KEY_USER: user key
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\param[in] keymode: specify button mode
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\arg KEY_MODE_GPIO: key will be used as simple IO
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\arg KEY_MODE_EXTI: key will be connected to EXTI line with interrupt
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\param[out] none
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\retval none
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*/
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void gd_eval_key_init(key_typedef_enum keynum, keymode_typedef_enum keymode)
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{
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/* enable the key clock */
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rcu_periph_clock_enable(KEY_CLK[keynum]);
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rcu_periph_clock_enable(RCU_CFGCMP);
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/* configure button pin as input */
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gpio_mode_set(KEY_PORT[keynum], GPIO_MODE_INPUT, GPIO_PUPD_PULLUP, KEY_PIN[keynum]);
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if (keymode == KEY_MODE_EXTI) {
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/* enable and set key EXTI interrupt to the lowest priority */
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nvic_irq_enable(KEY_IRQn[keynum], 2U);
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/* connect key EXTI line to key GPIO pin */
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syscfg_exti_line_config(KEY_PORT_SOURCE[keynum], KEY_PIN_SOURCE[keynum]);
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/* configure key EXTI line */
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exti_init(KEY_EXTI_LINE[keynum], EXTI_INTERRUPT, EXTI_TRIG_FALLING);
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exti_interrupt_flag_clear(KEY_EXTI_LINE[keynum]);
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}
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}
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/*!
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\brief return the selected key state
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\param[in] keynum: specify the key to be checked
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\arg KEY_TAMPER: tamper key
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\arg KEY_WAKEUP: wakeup key
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\arg KEY_USER: user key
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\param[out] none
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\retval the key's GPIO pin value
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*/
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uint8_t gd_eval_key_state_get(key_typedef_enum keynum)
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{
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return gpio_input_bit_get(KEY_PORT[keynum], KEY_PIN[keynum]);
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}
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