初始化
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/*!
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\file gd32c10x_eval.c
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\brief firmware functions to manage leds, keys, COM ports
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\version 2025-08-07, V1.6.0, firmware for GD32C10x
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*/
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/*
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Copyright (c) 2025, GigaDevice Semiconductor Inc.
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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 "gd32c10x_eval.h"
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/* private variables */
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static uint32_t GPIO_PORT[LED_MAX] = {LED1_GPIO_PORT, LED2_GPIO_PORT,
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LED3_GPIO_PORT, LED4_GPIO_PORT};
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static uint32_t GPIO_PIN[LED_MAX] = {LED1_PIN, LED2_PIN, LED3_PIN, LED4_PIN};
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static rcu_periph_enum COM_CLK[COMn] = {EVAL_COM0_CLK, EVAL_COM1_CLK};
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static uint32_t COM_TX_PIN[COMn] = {EVAL_COM0_TX_PIN, EVAL_COM1_TX_PIN};
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static uint32_t COM_RX_PIN[COMn] = {EVAL_COM0_RX_PIN, EVAL_COM1_RX_PIN};
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static uint32_t COM_GPIO_PORT[COMn] = {EVAL_COM0_GPIO_PORT, EVAL_COM1_GPIO_PORT};
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static rcu_periph_enum COM_GPIO_CLK[COMn] = {EVAL_COM0_GPIO_CLK, EVAL_COM1_GPIO_CLK};
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static rcu_periph_enum GPIO_CLK[LED_MAX] = {LED1_GPIO_CLK, LED2_GPIO_CLK,
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LED3_GPIO_CLK, LED4_GPIO_CLK};
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static uint32_t KEY_PORT[KEY_MAX] = {WAKEUP_KEY_GPIO_PORT,
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TAMPER_KEY_GPIO_PORT,
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USER_KEY_GPIO_PORT};
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static uint32_t KEY_PIN[KEY_MAX] = {WAKEUP_KEY_PIN, TAMPER_KEY_PIN,USER_KEY_PIN,};
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static rcu_periph_enum KEY_CLK[KEY_MAX] = {WAKEUP_KEY_GPIO_CLK,
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TAMPER_KEY_GPIO_CLK,
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USER_KEY_GPIO_CLK};
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static exti_line_enum KEY_EXTI_LINE[KEY_MAX] = {WAKEUP_KEY_EXTI_LINE,
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TAMPER_KEY_EXTI_LINE,
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USER_KEY_EXTI_LINE};
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static uint8_t KEY_PORT_SOURCE[KEY_MAX] = {WAKEUP_KEY_EXTI_PORT_SOURCE,
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TAMPER_KEY_EXTI_PORT_SOURCE,
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USER_KEY_EXTI_PORT_SOURCE};
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static uint8_t KEY_PIN_SOURCE[KEY_MAX] = {WAKEUP_KEY_EXTI_PIN_SOURCE,
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TAMPER_KEY_EXTI_PIN_SOURCE,
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USER_KEY_EXTI_PIN_SOURCE};
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static IRQn_Type KEY_IRQn[KEY_MAX] = {WAKEUP_KEY_EXTI_IRQn,
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TAMPER_KEY_EXTI_IRQn,
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USER_KEY_EXTI_IRQn};
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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_init(GPIO_PORT[lednum], GPIO_MODE_OUT_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_bit_write(GPIO_PORT[lednum], GPIO_PIN[lednum],
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(bit_status)(1-gpio_input_bit_get(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] key_num: 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] key_mode: 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 key_num, keymode_typedef_enum key_mode)
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{
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/* enable the key clock */
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rcu_periph_clock_enable(KEY_CLK[key_num]);
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rcu_periph_clock_enable(RCU_AF);
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/* configure button pin as input */
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gpio_init(KEY_PORT[key_num], GPIO_MODE_IN_FLOATING, GPIO_OSPEED_50MHZ, KEY_PIN[key_num]);
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if (key_mode == 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[key_num], 2U, 0U);
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/* connect key EXTI line to key GPIO pin */
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gpio_exti_source_select(KEY_PORT_SOURCE[key_num], KEY_PIN_SOURCE[key_num]);
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/* configure key EXTI line */
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exti_init(KEY_EXTI_LINE[key_num], EXTI_INTERRUPT, EXTI_TRIG_FALLING);
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exti_interrupt_flag_clear(KEY_EXTI_LINE[key_num]);
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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] key: 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 key)
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{
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return gpio_input_bit_get(KEY_PORT[key], KEY_PIN[key]);
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}
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/*!
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\brief configure COM port
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\param[in] com: COM on the board
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\arg EVAL_COM0: COM0 on the board
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\arg EVAL_COM1: COM1 on the board
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\param[out] none
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\retval none
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*/
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void gd_eval_com_init(uint32_t com)
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{
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uint32_t com_id = 0U;
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if(EVAL_COM0 == com){
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com_id = 0U;
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}else if(EVAL_COM1 == com){
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com_id = 1U;
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}else{
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com_id = 2U;
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}
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/* enable GPIO clock */
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rcu_periph_clock_enable(COM_GPIO_CLK[com_id]);
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/* enable USART clock */
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rcu_periph_clock_enable(COM_CLK[com_id]);
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/* connect port to USARTx_Tx */
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gpio_init(COM_GPIO_PORT[com_id], GPIO_MODE_AF_PP, GPIO_OSPEED_50MHZ, COM_TX_PIN[com_id]);
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/* connect port to USARTx_Rx */
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gpio_init(COM_GPIO_PORT[com_id], GPIO_MODE_IN_FLOATING, GPIO_OSPEED_50MHZ, COM_RX_PIN[com_id]);
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/* USART configure */
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usart_deinit(com);
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usart_baudrate_set(com, 115200U);
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usart_receive_config(com, USART_RECEIVE_ENABLE);
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usart_transmit_config(com, USART_TRANSMIT_ENABLE);
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usart_enable(com);
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}
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