99 lines
2.5 KiB
C
99 lines
2.5 KiB
C
#include "bsp.h"
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#define PLL_M 4
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#define PLL_N 168
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/* SYSCLK = PLL_VCO / PLL_P */
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#define PLL_P 2
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/* USB OTG FS, SDIO and RNG Clock = PLL_VCO / PLLQ */
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#define PLL_Q 7
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void SysTick_Handler(void)
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{
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//GPIO_ToggleBits(GPIOB, GPIO_Pin_0);
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}
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void USART2_IRQHandler()
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{
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}
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void sysTick_init(void) {
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uint32_t tick = SystemCoreClock/2 - 1;
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SysTick->LOAD = tick;
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SysTick->VAL = tick;
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SysTick->CTRL = SysTick_CTRL_CLKSOURCE_Msk | SysTick_CTRL_TICKINT_Msk | SysTick_CTRL_ENABLE_Msk;
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}
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void systemClock_init(void) {
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RCC_DeInit(); // Reset RCC configuration to default values
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RCC_HSEConfig(RCC_HSE_ON); // Enable HSE (High Speed External) clock
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if (RCC_WaitForHSEStartUp() == SUCCESS) { // Wait for HSE clock to stabilize
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RCC_PLLConfig(RCC_PLLSource_HSE, PLL_M, PLL_N, PLL_P, PLL_Q); // Configure PLL
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RCC_PLLCmd(ENABLE); // Enable PLL
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while (RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET); // Wait for PLL to stabilize
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FLASH->ACR = FLASH_ACR_ICEN |FLASH_ACR_DCEN |FLASH_ACR_LATENCY_5WS;
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RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK); // Set PLL as system clock
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while (RCC_GetSYSCLKSource() != RCC_CFGR_SWS_PLL); // Wait for PLL to become system clock
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}
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}
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void gpio_init() {
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const uint16_t led_pins = GPIO_Pin_0 | GPIO_Pin_7 | GPIO_Pin_14;
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const uint16_t usart_pins = GPIO_Pin_5 | GPIO_Pin_6;
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RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB, ENABLE);
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RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOD, ENABLE);
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GPIO_InitTypeDef gpio;
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GPIO_StructInit(&gpio);
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gpio.GPIO_Mode = GPIO_Mode_OUT;
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gpio.GPIO_Pin = led_pins;
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GPIO_Init(GPIOB, &gpio);
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GPIO_ResetBits(GPIOB, led_pins);
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gpio.GPIO_Mode = GPIO_Mode_AF;
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gpio.GPIO_Pin = usart_pins;
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gpio.GPIO_Speed = GPIO_Speed_50MHz;
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gpio.GPIO_OType = GPIO_OType_PP;
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gpio.GPIO_PuPd = GPIO_PuPd_UP;
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GPIO_Init(GPIOD, &gpio);
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GPIO_PinAFConfig(GPIOD, GPIO_PinSource5, GPIO_AF_USART2);
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GPIO_PinAFConfig(GPIOD, GPIO_PinSource6, GPIO_AF_USART2);
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}
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void usart_init() {
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RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);
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USART_InitTypeDef usart;
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usart.USART_BaudRate = 115200;
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usart.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
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USART_Init(USART2, &usart);
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USART_Cmd(USART2, ENABLE);
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//NVIC_EnableIRQ(USART2_IRQn);
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}
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void board_init() {
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SystemInit();
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//systemClock_init();
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sysTick_init();
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//__enable_irq();
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gpio_init();
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usart_init();
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}
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