172 lines
4.6 KiB
C
172 lines
4.6 KiB
C
/*
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* Copyright (c) 2006-2019, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2021-05-24 the first version
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*/
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#include <rthw.h>
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#include <rtthread.h>
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#include "at32f403a_407.h"
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#include "includes.h"
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#if defined(RT_USING_USER_MAIN) && defined(RT_USING_HEAP)
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/*
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* Please modify RT_HEAP_SIZE if you enable RT_USING_HEAP
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* the RT_HEAP_SIZE max value = (sram size - ZI size), 1024 means 1024 bytes
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*/
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#define RT_HEAP_SIZE (19*1024) /* 20KB-1KB to fit 41KB preset buffer in 96KB RAM */
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static rt_uint8_t rt_heap[RT_HEAP_SIZE];
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RT_WEAK void *rt_heap_begin_get(void)
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{
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return rt_heap;
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}
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RT_WEAK void *rt_heap_end_get(void)
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{
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return rt_heap + RT_HEAP_SIZE;
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}
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#endif
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void rt_os_tick_callback(void)
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{
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rt_interrupt_enter();
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rt_tick_increase();
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rt_interrupt_leave();
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}
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/**
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* This function will initial your board.
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*/
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void rt_hw_board_init(void)
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{
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//#error "TODO 1: OS Tick Configuration."
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/*
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* TODO 1: OS Tick Configuration
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* Enable the hardware timer and call the rt_os_tick_callback function
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* periodically with the frequency RT_TICK_PER_SECOND.
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*/
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wk_system_clock_config();
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system_core_clock_update();
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/* 使能 FPU（CP10/CP11 全访问）。
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RT-Thread 经 __low_level_init() 接管启动后，IAR cstartup 的 __iar_init_vfp 不会执行；
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若不手动使能，任何 VFP 指令（含 IAR 用 VFP 寄存器优化的 memcpy）
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都会触发 NOCP UsageFault，升级为 HardFault。 */
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SCB->CPACR |= ((3UL << (10 * 2)) | (3UL << (11 * 2)));
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__DSB();
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__ISB();
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//_SysTick_Config(system_core_clock / RT_TICK_PER_SECOND);
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SysTick_Config(system_core_clock/RT_TICK_PER_SECOND);
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/* Call components board initial (use INIT_BOARD_EXPORT()) */
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#ifdef RT_USING_COMPONENTS_INIT
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rt_components_board_init();
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#endif
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#if defined(RT_USING_USER_MAIN) && defined(RT_USING_HEAP)
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rt_system_heap_init(rt_heap_begin_get(), rt_heap_end_get());
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#endif
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}
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#ifdef RT_USING_CONSOLE
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//#include <LowLevelIOInterface.h>
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/* --------------------------------------------------------------------------
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* 控制台输出：USART2（PA2=TX, PA3=RX）@115200
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* 惰性初始化：首次调用时自行使能时钟并配置 UART，任意时机都可用
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* （rt_show_version、rt_kprintf、HardFault dump、printf 都走这里）
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* ------------------------------------------------------------------------ */
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static uint8_t console_uart_inited = 0;
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static void console_uart_init(void)
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{
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gpio_init_type gpio_init_struct;
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if (console_uart_inited)
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return;
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console_uart_inited = 1;
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gpio_default_para_init(&gpio_init_struct);
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/* 使能时钟 */
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crm_periph_clock_enable(CRM_GPIOA_PERIPH_CLOCK, TRUE);
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crm_periph_clock_enable(CRM_USART2_PERIPH_CLOCK, TRUE);
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/* PA2 = USART2_TX（复用推挽输出） */
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gpio_init_struct.gpio_mode = GPIO_MODE_MUX;
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gpio_init_struct.gpio_out_type = GPIO_OUTPUT_PUSH_PULL;
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gpio_init_struct.gpio_pull = GPIO_PULL_NONE;
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gpio_init_struct.gpio_drive_strength = GPIO_DRIVE_STRENGTH_MODERATE;
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gpio_init_struct.gpio_pins = GPIO_PINS_2;
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gpio_init(GPIOA, &gpio_init_struct);
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/* PA3 = USART2_RX（输入） */
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gpio_init_struct.gpio_mode = GPIO_MODE_INPUT;
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gpio_init_struct.gpio_pins = GPIO_PINS_3;
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gpio_init(GPIOA, &gpio_init_struct);
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usart_init(USART2, 115200, USART_DATA_8BITS, USART_STOP_1_BIT);
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usart_transmitter_enable(USART2, TRUE);
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usart_receiver_enable(USART2, TRUE);
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usart_parity_selection_config(USART2, USART_PARITY_NONE);
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usart_hardware_flow_control_set(USART2, USART_HARDWARE_FLOW_NONE);
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usart_enable(USART2, TRUE);
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}
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static void console_uart_putchar(char c)
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{
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while ((USART2->sts & USART_TDBE_FLAG) == RESET)
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{
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}
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USART2->dt = (uint16_t)c;
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}
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void rt_hw_console_output(const char *str)
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{
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console_uart_init();
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while (*str)
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{
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if (*str == '\n')
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console_uart_putchar('\r');
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console_uart_putchar(*str++);
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}
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}
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///* printf() 重定向到 USART2（IAR DLib low-level interface） */
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//size_t __write(int handle, const unsigned char *buffer, size_t size)
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//{
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// size_t n;
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//
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// if (handle != _LLIO_STDOUT && handle != _LLIO_STDERR)
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// return 0;
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//
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// console_uart_init();
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// for (n = 0; n < size; n++)
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// {
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// if (buffer[n] == '\n')
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// console_uart_putchar('\r');
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// console_uart_putchar((char)buffer[n]);
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// }
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// return size;
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//}
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static int uart_init(void)
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{
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/* console 采用惰性初始化，见 rt_hw_console_output / __write */
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return 0;
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}
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INIT_BOARD_EXPORT(uart_init);
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#endif
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