157 lines
4.1 KiB
C
157 lines
4.1 KiB
C
/*!
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\file main.c
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\brief use the I2C bus to write and read EEPROM with interrupt
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\version 2021-10-30, V1.0.0, firmware for GD32W51x
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*/
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/*
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Copyright (c) 2021, 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 <stdio.h>
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#include "gd32w51x.h"
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#include "gd32w515p_eval.h"
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#include "systick.h"
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#include "i2c.h"
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#include "at24cxx.h"
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uint8_t count = 0;
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void led_turn_on(uint8_t led_number);
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void led_config(void);
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/*!
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\brief configure the LEDs
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\param[in] none
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\param[out] none
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\retval none
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*/
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void led_config(void)
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{
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/* initialize off LED1, LED2, LED3 */
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gd_eval_led_init(LED1);
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gd_eval_led_init(LED2);
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gd_eval_led_init(LED3);
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/* turn off LED1, LED2, LED3 */
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gd_eval_led_off(LED1);
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gd_eval_led_off(LED2);
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gd_eval_led_off(LED3);
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}
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/*!
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\brief main function
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\param[in] none
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\param[out] none
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\retval none
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*/
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int main(void)
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{
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/* configure systick */
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systick_config();
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/* configure LEDs */
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led_config();
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/* configure USART */
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gd_eval_com_init(EVAL_COM0);
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printf("I2C-24C02 configured....\n\r");
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/* configure GPIO */
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gpio_config();
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/* configure I2C */
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i2c_config();
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/* initialize EEPROM */
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i2c_eeprom_init();
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printf("\r\nThe I2C is hardware interface ");
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printf("\r\nThe speed is %d", I2C_SPEED);
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if(I2C_OK == i2c_24c02_test()){
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while(1){
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/* turn off all LEDs */
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gd_eval_led_off(LED1);
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gd_eval_led_off(LED2);
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gd_eval_led_off(LED3);
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/* turn on a LED */
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led_turn_on(count%3);
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count++;
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if(count >= 3){
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count = 0;
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}
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delay_1ms(500);
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}
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}
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/* turn on all LEDs */
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gd_eval_led_on(LED1);
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gd_eval_led_on(LED2);
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gd_eval_led_on(LED3);
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while(1){
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}
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}
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/*!
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\brief turn on a LED
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\param[in] led_number
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\param[out] none
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\retval none
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*/
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void led_turn_on(uint8_t led_number)
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{
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switch(led_number){
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case 0:
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gd_eval_led_on(LED1);
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break;
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case 1:
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gd_eval_led_on(LED2);
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break;
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case 2:
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gd_eval_led_on(LED3);
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break;
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default:
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gd_eval_led_on(LED1);
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gd_eval_led_on(LED2);
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gd_eval_led_on(LED3);
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break;
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}
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}
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/* retarget the C library printf function to the usart */
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int fputc(int ch, FILE *f)
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{
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usart_data_transmit(EVAL_COM0, (uint8_t)ch);
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while(RESET == usart_flag_get(EVAL_COM0, USART_FLAG_TBE));
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return ch;
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}
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