390 lines
9.7 KiB
C
390 lines
9.7 KiB
C
/**
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**************************************************************************
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* @file at32f435_437_board.c
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* @brief set of firmware functions to manage leds and push-button.
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* initialize delay function.
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**************************************************************************
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* Copyright notice & Disclaimer
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*
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* The software Board Support Package (BSP) that is made available to
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* download from Artery official website is the copyrighted work of Artery.
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* Artery authorizes customers to use, copy, and distribute the BSP
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* software and its related documentation for the purpose of design and
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* development in conjunction with Artery microcontrollers. Use of the
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* software is governed by this copyright notice and the following disclaimer.
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*
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* THIS SOFTWARE IS PROVIDED ON "AS IS" BASIS WITHOUT WARRANTIES,
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* GUARANTEES OR REPRESENTATIONS OF ANY KIND. ARTERY EXPRESSLY DISCLAIMS,
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* TO THE FULLEST EXTENT PERMITTED BY LAW, ALL EXPRESS, IMPLIED OR
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* STATUTORY OR OTHER WARRANTIES, GUARANTEES OR REPRESENTATIONS,
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* INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.
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*
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**************************************************************************
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*/
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#include "at32f435_437_board.h"
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/** @addtogroup AT32F435_437_board
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* @{
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*/
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/** @defgroup BOARD
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* @brief onboard periph driver
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* @{
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*/
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/* delay macros */
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#define STEP_DELAY_MS 50
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/* at-start led resouce array */
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gpio_type *led_gpio_port[LED_NUM] = {LED2_GPIO, LED3_GPIO, LED4_GPIO};
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uint16_t led_gpio_pin[LED_NUM] = {LED2_PIN, LED3_PIN, LED4_PIN};
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crm_periph_clock_type led_gpio_crm_clk[LED_NUM] = {LED2_GPIO_CRM_CLK, LED3_GPIO_CRM_CLK, LED4_GPIO_CRM_CLK};
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/* delay variable */
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static __IO uint32_t fac_us;
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static __IO uint32_t fac_ms;
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/* support printf function, usemicrolib is unnecessary */
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#if (__ARMCC_VERSION > 6000000)
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__asm (".global __use_no_semihosting\n\t");
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void _sys_exit(int x)
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{
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x = x;
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}
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/* __use_no_semihosting was requested, but _ttywrch was */
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void _ttywrch(int ch)
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{
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ch = ch;
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}
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FILE __stdout;
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#else
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#ifdef __CC_ARM
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#pragma import(__use_no_semihosting)
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struct __FILE
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{
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int handle;
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};
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FILE __stdout;
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void _sys_exit(int x)
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{
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x = x;
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}
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/* __use_no_semihosting was requested, but _ttywrch was */
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void _ttywrch(int ch)
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{
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ch = ch;
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}
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#endif
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#endif
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#if defined (__GNUC__) && !defined (__clang__)
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#define PUTCHAR_PROTOTYPE int __io_putchar(int ch)
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#else
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#define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f)
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#endif
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/**
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* @brief retargets the c library printf function to the usart.
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* @param none
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* @retval none
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*/
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PUTCHAR_PROTOTYPE
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{
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while(usart_flag_get(PRINT_UART, USART_TDBE_FLAG) == RESET);
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usart_data_transmit(PRINT_UART, ch);
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return ch;
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}
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#if defined (__GNUC__) && !defined (__clang__)
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int _write(int fd, char *pbuffer, int size)
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{
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for(int i = 0; i < size; i ++)
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{
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__io_putchar(*pbuffer++);
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}
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return size;
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}
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#endif
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/**
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* @brief initialize uart
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* @param baudrate: uart baudrate
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* @retval none
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*/
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void uart_print_init(uint32_t baudrate)
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{
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gpio_init_type gpio_init_struct;
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#if defined (__GNUC__) && !defined (__clang__)
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setvbuf(stdout, NULL, _IONBF, 0);
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#endif
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/* enable the uart and gpio clock */
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crm_periph_clock_enable(PRINT_UART_CRM_CLK, TRUE);
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crm_periph_clock_enable(PRINT_UART_TX_GPIO_CRM_CLK, TRUE);
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gpio_default_para_init(&gpio_init_struct);
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/* configure the uart tx pin */
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gpio_init_struct.gpio_drive_strength = GPIO_DRIVE_STRENGTH_STRONGER;
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gpio_init_struct.gpio_out_type = GPIO_OUTPUT_PUSH_PULL;
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gpio_init_struct.gpio_mode = GPIO_MODE_MUX;
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gpio_init_struct.gpio_pins = PRINT_UART_TX_PIN;
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gpio_init_struct.gpio_pull = GPIO_PULL_NONE;
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gpio_init(PRINT_UART_TX_GPIO, &gpio_init_struct);
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gpio_pin_mux_config(PRINT_UART_TX_GPIO, PRINT_UART_TX_PIN_SOURCE, PRINT_UART_TX_PIN_MUX_NUM);
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/* configure uart param */
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usart_init(PRINT_UART, baudrate, USART_DATA_8BITS, USART_STOP_1_BIT);
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usart_transmitter_enable(PRINT_UART, TRUE);
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usart_enable(PRINT_UART, TRUE);
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}
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/**
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* @brief board initialize interface init led and button
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* @param none
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* @retval none
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*/
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void at32_board_init()
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{
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/* initialize delay function */
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delay_init();
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/* configure led in at_start_board */
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at32_led_init(LED2);
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at32_led_init(LED3);
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at32_led_init(LED4);
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at32_led_off(LED2);
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at32_led_off(LED3);
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at32_led_off(LED4);
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/* configure button in at_start board */
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at32_button_init();
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}
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/**
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* @brief configure button gpio
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* @param button: specifies the button to be configured.
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* @retval none
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*/
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void at32_button_init(void)
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{
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gpio_init_type gpio_init_struct;
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/* enable the button clock */
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crm_periph_clock_enable(USER_BUTTON_CRM_CLK, TRUE);
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/* set default parameter */
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gpio_default_para_init(&gpio_init_struct);
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/* configure button pin as input with pull-up/pull-down */
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gpio_init_struct.gpio_drive_strength = GPIO_DRIVE_STRENGTH_STRONGER;
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gpio_init_struct.gpio_out_type = GPIO_OUTPUT_PUSH_PULL;
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gpio_init_struct.gpio_mode = GPIO_MODE_INPUT;
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gpio_init_struct.gpio_pins = USER_BUTTON_PIN;
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gpio_init_struct.gpio_pull = GPIO_PULL_DOWN;
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gpio_init(USER_BUTTON_PORT, &gpio_init_struct);
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}
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/**
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* @brief returns the selected button state
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* @param none
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* @retval the button gpio pin value
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*/
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uint8_t at32_button_state(void)
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{
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return gpio_input_data_bit_read(USER_BUTTON_PORT, USER_BUTTON_PIN);
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}
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/**
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* @brief returns which button have press down
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* @param none
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* @retval the button have press down
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*/
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button_type at32_button_press()
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{
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static uint8_t pressed = 1;
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/* get button state in at_start board */
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if((pressed == 1) && (at32_button_state() != RESET))
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{
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/* debounce */
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pressed = 0;
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delay_ms(10);
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if(at32_button_state() != RESET)
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return USER_BUTTON;
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}
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else if(at32_button_state() == RESET)
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{
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pressed = 1;
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}
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return NO_BUTTON;
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}
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/**
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* @brief configure led gpio
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* @param led: specifies the led to be configured.
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* @retval none
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*/
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void at32_led_init(led_type led)
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{
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gpio_init_type gpio_init_struct;
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/* enable the led clock */
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crm_periph_clock_enable(led_gpio_crm_clk[led], TRUE);
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/* set default parameter */
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gpio_default_para_init(&gpio_init_struct);
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/* configure the led gpio */
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gpio_init_struct.gpio_drive_strength = GPIO_DRIVE_STRENGTH_STRONGER;
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gpio_init_struct.gpio_out_type = GPIO_OUTPUT_PUSH_PULL;
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gpio_init_struct.gpio_mode = GPIO_MODE_OUTPUT;
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gpio_init_struct.gpio_pins = led_gpio_pin[led];
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gpio_init_struct.gpio_pull = GPIO_PULL_NONE;
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gpio_init(led_gpio_port[led], &gpio_init_struct);
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}
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/**
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* @brief turns selected led on.
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* @param led: specifies the led to be set on.
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* this parameter can be one of following parameters:
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* @arg LED2
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* @arg LED3
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* @arg LED4
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* @retval none
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*/
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void at32_led_on(led_type led)
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{
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if(led > (LED_NUM - 1))
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return;
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if(led_gpio_pin[led])
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led_gpio_port[led]->clr = led_gpio_pin[led];
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}
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/**
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* @brief turns selected led off.
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* @param led: specifies the led to be set off.
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* this parameter can be one of following parameters:
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* @arg LED2
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* @arg LED3
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* @arg LED4
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* @retval none
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*/
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void at32_led_off(led_type led)
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{
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if(led > (LED_NUM - 1))
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return;
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if(led_gpio_pin[led])
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led_gpio_port[led]->scr = led_gpio_pin[led];
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}
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/**
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* @brief turns selected led toggle.
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* @param led: specifies the led to be set off.
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* this parameter can be one of following parameters:
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* @arg LED2
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* @arg LED3
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* @arg LED4
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* @retval none
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*/
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void at32_led_toggle(led_type led)
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{
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if(led > (LED_NUM - 1))
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return;
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if(led_gpio_pin[led])
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led_gpio_port[led]->odt ^= led_gpio_pin[led];
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}
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/**
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* @brief initialize delay function
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* @param none
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* @retval none
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*/
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void delay_init()
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{
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/* configure systick */
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systick_clock_source_config(SYSTICK_CLOCK_SOURCE_AHBCLK_NODIV);
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fac_us = system_core_clock / (1000000U);
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fac_ms = fac_us * (1000U);
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}
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/**
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* @brief inserts a delay time.
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* @param nus: specifies the delay time length, in microsecond.
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* @retval none
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*/
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void delay_us(uint32_t nus)
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{
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uint32_t temp = 0;
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SysTick->LOAD = (uint32_t)(nus * fac_us);
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SysTick->VAL = 0x00;
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SysTick->CTRL |= SysTick_CTRL_ENABLE_Msk ;
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do
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{
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temp = SysTick->CTRL;
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}while((temp & 0x01) && !(temp & (1 << 16)));
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SysTick->CTRL &= ~SysTick_CTRL_ENABLE_Msk;
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SysTick->VAL = 0x00;
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}
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/**
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* @brief inserts a delay time.
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* @param nms: specifies the delay time length, in milliseconds.
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* @retval none
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*/
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void delay_ms(uint16_t nms)
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{
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uint32_t temp = 0;
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while(nms)
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{
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if(nms > STEP_DELAY_MS)
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{
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SysTick->LOAD = (uint32_t)(STEP_DELAY_MS * fac_ms);
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nms -= STEP_DELAY_MS;
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}
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else
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{
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SysTick->LOAD = (uint32_t)(nms * fac_ms);
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nms = 0;
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}
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SysTick->VAL = 0x00;
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SysTick->CTRL |= SysTick_CTRL_ENABLE_Msk;
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do
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{
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temp = SysTick->CTRL;
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}while((temp & 0x01) && !(temp & (1 << 16)));
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SysTick->CTRL &= ~SysTick_CTRL_ENABLE_Msk;
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SysTick->VAL = 0x00;
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}
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}
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/**
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* @brief inserts a delay time.
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* @param sec: specifies the delay time, in seconds.
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* @retval none
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*/
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void delay_sec(uint16_t sec)
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{
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uint16_t index;
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for(index = 0; index < sec; index++)
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{
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delay_ms(500);
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delay_ms(500);
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}
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}
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/**
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* @}
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*/
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/**
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* @}
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*/
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