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/************************************************************************************ * Copyright (c), 2006-2007, C8051F网络 * All rights reserved. * * Http: www.c8051f.com * Email: mite@vip.qq.com * * File name: timer.c * File name: iic.c * Project : C8051F040DK * Processor: C8051F040 * Compiler : Keil C51 Compiler * * Author : EmbedARM * Version: 1.00 * Date : 2009.8.5 * Email : EmbedARM@126.com * Modification: none * * Description: 本文件是timer硬件驱动程序文件; * * Others: none; * * Function List: * 1. void Timer0_Init(unsigned long freq) * 2. void Timer0_Enable(void) * 3. void Timer0_Disable(void) * 4. void Timer0_SetValue(unsigned int value) * 5. void Timer1_Init(unsigned long freq) * 6. void Timer1_Enable(void) * 7. void Timer1_Disable(void) * 8. void Timer1_SetValue(unsigned int value) * 9. void Timer2_Init(unsigned long freq) * 10. void Timer2_Enable(void) * 11. void Timer2_Disable(void) * 12. void Timer2_SetValue(unsigned int value) * 13. void Timer3_Init(unsigned long freq) * 14. void Timer3_Enable(void) * 15. void Timer3_Disable(void) * 16. void Timer3_SetValue(unsigned int value) * * History: * 1. Author: 李林利 * Version: 0.9 * Date: 2009.1.1 * Modification: none * *************************************************************************************/ /************************************************************************************/ // 引用外部头文件 #include "..\config\c8051f040.h" #include "..\config\const.h" #include "timer.h" unsigned int timer0_10ms; unsigned int timer2_10ms; unsigned int timer3_10ms; unsigned int timer4_10ms; unsigned char T0h,T0l; extern unsigned long code sysclk; /*************************************************************************************/ // // Timer0 参数及函数定义 // // Note: Timer0未被占用,以下函数用户可自由修改使用 // /*************************************************************************************/ /*********************************************************************************** * Function: Timer0_Init; * * Description: Timer0 初始化函数; * * Input: freq,定时或计数溢出频率; * * Return: none; * * Note: 该定时器未被占用用户可自由使用; ************************************************************************************/ void Timer0_Init(unsigned long freq) { unsigned int count; char data SFRPAGE_SAVE = SFRPAGE; // Save Current SFR page SFRPAGE = TIMER01_PAGE; // set SFR page 0 CKCON = 0; TMOD &= ~0x0f; TMOD|=0x01; count = -(sysclk/freq/12); TH0 = (count>>8)&0x00ff; TL0 = count&0x00ff; T0h = TH0; T0l = TL0; ET0 = 1; // 允许中断 SFRPAGE = SFRPAGE_SAVE; // Restore SFR page } /*********************************************************************************** * Function: Timer0_Enable; * * Description: Timer0使能函数, Timer0开始工作; * * Input: none; * * Return: none; * * Note: none; ************************************************************************************/ void Timer0_Enable(void) { char data SFRPAGE_SAVE = SFRPAGE; // Save Current SFR page SFRPAGE = TIMER01_PAGE; // set SFR page 0 TR0 = 1; SFRPAGE = SFRPAGE_SAVE; // Restore SFR page } /*********************************************************************************** * Function: Timer0_Disable; * * Description: Timer0关闭函数, Timer0停止工作; * * Input: none; * * Return: none; * * Note: none; ************************************************************************************/ void Timer0_Disable(void) { char data SFRPAGE_SAVE = SFRPAGE; // Save Current SFR page SFRPAGE = TIMER01_PAGE; // set SFR page 0 TR0 = 0; SFRPAGE = SFRPAGE_SAVE; // Restore SFR page } /*********************************************************************************** * Function: Timer0_SetValue; * * Description: 设置定时或计数寄存器值; * * Input: value,定时或计数寄存器值; * * Return: none; * * Note: none; ************************************************************************************/ void Timer0_SetValue(unsigned int value) { char data SFRPAGE_SAVE = SFRPAGE; // Save Current SFR page SFRPAGE = TIMER01_PAGE; // set SFR page 0 TL0 = value&0x00ff; TH0 = (value>>8)&0x00ff; SFRPAGE = SFRPAGE_SAVE; // Restore SFR page } /*********************************************************************************** * Function: Timer0_ISR; * * Description: 定时器0中断响应; * * Input: none; * * Return: none; * * Note: none; ************************************************************************************/ void Timer0_ISR (void) interrupt 1 using 3 { char data SFRPAGE_SAVE = SFRPAGE; // Save Current SFR page SFRPAGE = TIMER01_PAGE; // set SFR page 0 TR0 = 0; TH0 = T0h; TL0 = T0l; TR0 = 1; timer0_10ms++; SFRPAGE = SFRPAGE_SAVE; // Restore SFR page } /*************************************************************************************/ // // Timer1 参数及函数定义 // // Note: Timer1已被UART0占用,在不应用UART0的情况下 // 以下函数用户可自由修改使用 // /*************************************************************************************/ /*********************************************************************************** * Function: Timer1_Init; * * Description: Timer1 初始化函数; * * Input: freq, 定时或计数溢出频率; * * Return: none; * * Note: none; ************************************************************************************/ void Timer1_Init(unsigned long freq) { unsigned char count,n; char data SFRPAGE_SAVE = SFRPAGE; // Save Current SFR page SFRPAGE = TIMER01_PAGE; TMOD&=0x0f; TMOD|=0; //PCON |= 0x90; // SMOD1 = 1, 禁止Uart1的波特率/2功能 n = sysclk/freq/16/256; // 计算判断变量 if (n < 1) { count = -(sysclk/freq/16); // 计算定时器计数值 CKCON |= 0x10; // T1M = 1,系统时钟 } else if (n < 12) { count = -(sysclk/freq/16/12); // 计算定时器计数值 CKCON &= ~0x10; // T1M = 1,系统时钟/12 } else { PCON &= ~0x10; // SMOD1 = 1, 允许Uart1的波特率/2功能 count = -(sysclk/freq/16/12); // 计算定时器计数值 CKCON &= ~0x10; // T1M = 1,系统时钟/12 } TL1 = count; TH1 = count; SFRPAGE = SFRPAGE_SAVE; // Restore SFR page } /*********************************************************************************** * Function: Timer1_Enable; * * Description: Timer1使能函数,Timer1开始工作; * * Input: none; * * Return: none; * * Note: none; ************************************************************************************/ void Timer1_Enable(void) { char data SFRPAGE_SAVE = SFRPAGE; // Save Current SFR page SFRPAGE = TIMER01_PAGE; TR1 = 1; SFRPAGE = SFRPAGE_SAVE; // Restore SFR page } /*********************************************************************************** * Function: Timer1_Disable; * * Description: Timer1关闭函数,Timer0停止工作; * * Input: none; * * Return: none; * * Note: none; ************************************************************************************/ void Timer1_Disable(void) { char data SFRPAGE_SAVE = SFRPAGE; // Save Current SFR page SFRPAGE = TIMER01_PAGE; TR1 = 0; SFRPAGE = SFRPAGE_SAVE; // Restore SFR page } /*********************************************************************************** * Function: Timer1_SetValue; * * Description: 设置定时或计数寄存器值; * * Input: value,定时或计数寄存器值; * * Return: none; * * Note: none; *