hm
fc10ef2e10
GD32F470ZGT6 based project with full peripheral support: - SDRAM (W9825G6KH) via EXMC - LCD NT35510 (480x800) via EXMC NOR/PSRAM - Flash (W25Q64) via SPI - UART (USART0) debug console - LED indicators - CMSIS-DAP debug interface - CMake + ARM GCC toolchain build system
67 lines
1.0 KiB
C++
67 lines
1.0 KiB
C++
#include "gd32f4xx.h"
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#include "systick.h"
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SysTickTimer &SysTickTimer::instance()
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{
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static SysTickTimer timer;
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return timer;
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}
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RetCode SysTickTimer::config()
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{
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uint32_t clock_freq = SystemCoreClock;
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SysTick->CTRL = 0;
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if (clock_freq / 1000U > 0xFFFFFFU)
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{
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SysTick->LOAD = 0xFFFFFFU;
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}
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else
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{
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SysTick->LOAD = (clock_freq / 1000U) - 1;
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}
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SysTick->VAL = 0;
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SysTick->CTRL = SysTick_CTRL_CLKSOURCE_Msk |
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SysTick_CTRL_TICKINT_Msk |
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SysTick_CTRL_ENABLE_Msk;
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NVIC_SetPriority(SysTick_IRQn, 0x80U);
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return RET_OK;
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}
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void SysTickTimer::delay_ms(uint32_t count)
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{
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delay_ = count;
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while (0U != delay_)
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{
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}
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}
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void SysTickTimer::decrement()
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{
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if (0U != delay_)
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{
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delay_--;
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}
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}
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void systick_config(void)
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{
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SysTickTimer::instance().config();
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}
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void delay_1ms(uint32_t count)
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{
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SysTickTimer::instance().delay_ms(count);
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}
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void delay_decrement(void)
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{
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SysTickTimer::instance().decrement();
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}
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