a47cfa7fa5
Took a publicly available XMODEM bootloader and made it work on HK32F. Known issues: - Erase is super slow on this MCU. The upload routine erases all flash before loading, which means the first packet seems to hang. This also erases possibly persistent data stored in unused pages on flash.
72 lines
2.4 KiB
C
72 lines
2.4 KiB
C
#include "systick_delay.h"
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#include "hk32f030m.h"
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static uint32_t fac_us = 0;
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static uint32_t fac_ms = 0;
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/*******************************************************************************
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* Function Name : SysTick_Init
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* Description : SysTick Initialize
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* Input : none
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* Output : none
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* Return : none
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* Set SysTick clock source to 1/8 of HCLK
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*******************************************************************************/
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void SysTick_Init(void)
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{
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SysTick_CLKSourceConfig(SysTick_CLKSource_HCLK_Div8);
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fac_us = SystemCoreClock / 8000000;
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fac_ms = SystemCoreClock / 8000;
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}
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/*******************************************************************************
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* Function Name : SysTick_DelayUs
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* Description : delay by microseconds
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* Input : nus -- number of microseconds
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* Output : none
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* Return : none
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*******************************************************************************/
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void SysTick_DelayUs(uint32_t nus)
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{
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uint32_t temp;
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if (nus > 0)
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{
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SysTick->LOAD = nus * fac_us; // Set Reload Value
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SysTick->VAL = 0x00; // Set Current Value to 0
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SysTick->CTRL |= SysTick_CTRL_ENABLE_Msk; // Start counter
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// Block when SysTick is running and counter flag not set
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do
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{
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temp = SysTick->CTRL;
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}
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while ((temp & SysTick_CTRL_ENABLE_Msk) && !(temp & SysTick_CTRL_COUNTFLAG_Msk));
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SysTick->CTRL &= ~SysTick_CTRL_ENABLE_Msk; // Stop counter
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}
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}
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/*******************************************************************************
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* Function Name : SysTick_DelayMs
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* Description : Delay by milliseconds
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SysTick->LOAD is 24-bit so the max delay = 0xFFFFFF*8*1000 / SYSCLK
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* Input : nms -- number of milliseconds
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*******************************************************************************/
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void SysTick_DelayMs(uint16_t nms)
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{
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uint32_t temp;
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if (nms > 0)
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{
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SysTick->LOAD = nms * fac_ms; // Set Reload Value (24-bit)
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SysTick->VAL = 0x00; // Set Current Value to 0
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SysTick->CTRL |= SysTick_CTRL_ENABLE_Msk; // Start counter
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// Block when SysTick is running and counter flag not set
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do
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{
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temp = SysTick->CTRL;
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}
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while ((temp & SysTick_CTRL_ENABLE_Msk) && !(temp & SysTick_CTRL_COUNTFLAG_Msk));
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SysTick->CTRL &= ~SysTick_CTRL_ENABLE_Msk; // Stop counter
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}
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}
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