/**
??******************************************************************************
??*?@file????delay.c
??*?@author??Microcontroller?Division
??*?@version?V1.2.0
??*?@date????09/2010
??*?@brief???delay?functions
??******************************************************************************
??*?@copy
??*
??*?THE?PRESENT?FIRMWARE?WHICH?IS?FOR?GUIDANCE?ONLY?AIMS?AT?PROVIDING?CUSTOMERS
??*?WITH?CODING?INFORMATION?REGARDING?THEIR?PRODUCTS?IN?ORDER?FOR?THEM?TO?SAVE
??*?TIME.?AS?A?RESULT?STMICROELECTRONICS?SHALL?NOT?BE?HELD?LIABLE?FOR?ANY
??*?DIRECT?INDIRECT?OR?CONSEQUENTIAL?DAMAGES?WITH?RESPECT?TO?ANY?CLAIMS?ARISING
??*?FROM?THE?CONTENT?OF?SUCH?FIRMWARE?AND/OR?THE?USE?MADE?BY?CUSTOMERS?OF?THE
??*?CODING?INFORMATION?CONTAINED?HEREIN?IN?CONNECTION?WITH?THEIR?PRODUCTS.
??*
??*?
©?COPYRIGHT?2010?STMicroelectronics

??*/

/*?Includes?------------------------------------------------------------------*/

#include?“stm8l15x_clk.h“
/**
??*?@brief??delay?for?some?time?in?ms?unit
??*?@caller?auto_test
??*?@param??n_ms?is?how?many?ms?of?time?to?delay
??*?@retval?None
??*/
void?delay_ms（u16?n_ms）
{
/*?Init?TIMER?4?*/
??CLK_PeripheralClockConfig（CLK_Peripheral_TIM4?ENABLE）;

/*?Init?TIMER?4?prescaler:?/?（2^6）?=?/64?*/
??TIM4->PSCR?=?6;

/*?HSI?div?by?1?-->?Auto-Reload?value:?16M?/?64?=?1/4M?1/4M?/?1k?=?250*/
??TIM4->ARR?=?250;
??
/*?Counter?value:?2?to?compensate?the?initialization?of?TIMER*/
??TIM4->CNTR?=?2;

/*?clear?update?flag?*/
??TIM4->SR1?&=?~TIM4_SR1_UIF;

/*?Enable?Counter?*/
??TIM4->CR1?|=?TIM4_CR1_CEN;

??while（n_ms--）
??{
????while（（TIM4->SR1?&?TIM4_SR1_UIF）?==?0）?;
????TIM4->SR1?&=?~TIM4_SR1_UIF;
??}

/*?Disable?Counter?*/
??TIM4->CR1?&=?~TIM4_CR1_CEN;
}

/**
??*?@brief??delay?for?some?time?in?10us?unit（partial?accurate）
??*?@caller?auto_test
??*?@param?n_10us?is?how?many?10us?of?time?to?delay
??*?@retval?None
??*/
void?delay_10us（u16?n_10us）
{
/*?Init?TIMER?4?*/
??CLK_PeripheralClockConfig（CLK_Peripheral_TIM4?ENABLE）;

/*?prescaler:?/?（2^0）?=?/1?*/
??TIM4->PSCR?=?0;

/*?SYS_CLK_HSI_DIV1?Auto-Reload?value:?16M?/?1?=?16M?16M?/?100k?=?160?*/
??TIM4->ARR?=?160;

/*?Counter?value:?10?to?compensate?the?initialization?of?TIMER?*/
??TIM4->CNTR?=?10;

/*?clear?update?flag?*/
??TIM4->SR1?&=?~TIM4_SR1_UIF;

/*?Enable?Counter?*/
??TIM4->CR1?|=?TIM4_CR1_CEN;

??while（n_10us--）
??{
????while（（TIM4->SR1?&?TIM4_SR1_UIF）?==?0）?;
????TIM4->SR1?&=?~TIM4_SR1_UIF;
??}

/*?Disable?Counter?*/
??TIM4->CR1?&=?~TIM4_CR1_CEN;
?CLK_PeripheralClockConfig（CLK_Peripheral_TIM4?DISABLE）;

}
void?delay_nus（u8?n_us）?
{?
??u8?i;??
??for（i=0;i??{
????asm（“nop“）;
????asm（“nop“）;
????asm（“nop“）;
????asm（“nop“）;
????asm（“nop“）;
????asm（“nop“）;
????asm（“nop“）;
????asm（“nop“）;
????asm（“nop“）;
??}??
}

/*******************?（C）?COPYRIGHT?2010?STMicroelectronics?*****END?OF?FILE****/

?屬性????????????大小?????日期????時間???名稱
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?????文件?????278528??2011-04-15?21:57??TM1638芯片+DS1302驅動共陰數碼管時鐘.doc

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???????????????278528????????????????????1