定时器PWM输出实验

1、定时器 PWM 输出实验1. 实验目的1) 熟悉 Linux 开发环境。2) 掌握 S5PV210 内部相关寄存器的操作方法，最终实现对外部设备的控制。3) 熟悉在 Linux 裸机环境下的 C 语言编程。4) 熟悉 S5PV210 的定时器编程。2 实验内容学习并编程实现ARM 的定时器PWM 输出。3 实验设备1) 硬件： S5PV210 教学实验箱、 PC 机；2) 软件： PC 机操作系统 Windows 98(2000 、XP) VMware workstation+Ubuntu12 开发环境。4 基础知识S5PV210 共有 5 个 32bit 的 PWM 定时器，其中定时器 0、

2、1、2、3 有 PWM 功能，定时器 4 没有输出引脚。 PWM 定时器使用 PCLK_PSYS 作为时钟源。专业文档供参考，如有帮助请下载。时钟初始化相关寄存器专业文档供参考，如有帮助请下载。专业文档供参考，如有帮助请下载。定时器初始化相关定时器专业文档供参考，如有帮助请下载。专业文档供参考，如有帮助请下载。定时器 PWM 输出控制的相关内容： GPD0CON 确定 GPD0DA T 引脚的功能，本实验用 GPD00 作为 TOUT_0 的输出。实验程序#define MP0_4CON(*(volatile unsigned long *)0xE0200340)#define MP0_4DA

3、T(*(volatile unsigned long *)0xE0200344)#define GPD0CON(*(volatile unsigned long *)0xE02000A0)#define GPD0DAT(*(volatile unsigned long *)0xE02000A4)/ clock专业文档供参考，如有帮助请下载。#define APLL_LOCK(*(volatile unsigned long *)0xE0100000)#define MPLL_LOCK(*(volatile unsigned long *)0xE0100008)#define APLL_CON0

4、(*(volatile unsigned long *)0xE0100100)#define APLL_CON1(*(volatile unsigned long *)0xE0100104)#define MPLL_CON(*(volatile unsigned long *)0xE0100108)#define CLK_SRC0(*(volatile unsigned long *)0xE0100200)#define CLK_SRC1(*(volatile unsigned long *)0xE0100204)#define CLK_SRC2(*(volatile unsigned lon

5、g *)0xE0100208)#define CLK_SRC3(*(volatile unsigned long *)0xE010020c)#define CLK_SRC4(*(volatile unsigned long *)0xE0100210)#define CLK_SRC5(*(volatile unsigned long *)0xE0100214)#define CLK_SRC6(*(volatile unsigned long *)0xE0100218)#define CLK_SRC_MASK0(*(volatile unsigned long *)0xE0100280)#defi

6、ne CLK_SRC_MASK1(*(volatile unsigned long *)0xE0100284)#define CLK_DIV0(*(volatile unsigned long *)0xE0100300)#define CLK_DIV1(*(volatile unsigned long *)0xE0100304)#define CLK_DIV2(*(volatile unsigned long *)0xE0100308)#define CLK_DIV3(*(volatile unsigned long *)0xE010030c)#define CLK_DIV4(*(volati

7、le unsigned long *)0xE0100310)#define CLK_DIV5(*(volatile unsigned long *)0xE0100314)#define CLK_DIV6(*(volatile unsigned long *)0xE0100318)#define CLK_DIV7(*(volatile unsigned long *)0xE010031c)#define CLK_DIV0_MASK0x7fffffff#define APLL_MDIV0x7d#define APLL_PDIV0x3#define APLL_SDIV0x1#define MPLL_

8、MDIV0x29b#define MPLL_PDIV0xc#define MPLL_SDIV0x1#define set_pll(mdiv, pdiv, sdiv)(131 | mdiv16 | pdiv8 | sdiv)#define APLL_VALset_pll(APLL_MDIV,APLL_PDIV ,APLL_SDIV)#define MPLL_VALset_pll(MPLL_MDIV ,MPLL_PDIV,MPLL_SDIV)/ PWM CLOCK#defineTCFG0( *(volatile unsigned long *)0xE2500000)#defineTCFG1( *(

9、volatile unsigned long *)0xE2500004)#defineTCON( *(volatile unsigned long *)0xE2500008)#defineTCNTB0( *(volatile unsigned long *)0xE250000C)#defineTCMPB0( *(volatile unsigned long *)0xE2500010)#defineTCNTO0( *(volatile unsigned long *)0xE2500014)#defineTCNTB1( *(volatile unsigned long *)0xE2500018)#

10、defineTCMPB1( *(volatile unsigned long *)0xE250001C)#defineTCNTO1( *(volatile unsigned long *)0xE2500020)#defineTCNTB2( *(volatile unsigned long *)0xE2500024)#defineTCMPB2( *(volatile unsigned long *)0xE2500028)专业文档供参考，如有帮助请下载。#defineTCNTO2( *(volatile unsigned long *)0xE250002C)#defineTCNTB3( *(vol

11、atile unsigned long *)0xE2500030)#defineTCMPB3( *(volatile unsigned long *)0xE2500034)#defineTCNTO3( *(volatile unsigned long *)0xE2500038)#defineTCNTB4( *(volatile unsigned long *)0xE250003C)#defineTCNTO4( *(volatile unsigned long *)0xE2500040)#defineTINT_CSTAT( *(volatile unsigned long *)0xE250004

12、4)void init_clock(void)CLK_SRC0 = 0x0;/ close PLLAPLL_LOCK= 0x0000FFFF;MPLL_LOCK = 0x0000FFFF;/ set PLLAPLL_CON0 =APLL_VAL;/FOUT= MDIV * FIN / (PDIV*2(SDIV-1) = 1000 MHzMPLL_CON = MPLL_VAL;/ FOUT = MDIV*FIN/(PDIV*2SDIV)=667 MHzCLK_SRC0= 0x10001111;/ FOUT = MDIV*FIN/(PDIV*2SDIV)=667 MHzvoid init_time

13、r(unsigned long tcntb,unsigned long tcmpb)TCON = 0;TCFG0= (TCFG0 & 0xff00ff)|0x41;/设置预分频系数65TCFG1 =(TCFG1 & (0xf0)|0x04;/ 16分频输入时钟 = PCLK /(prescaler+ 1) /divider=62500hzTCNTB0 = tcntb;TCMPB0 = tcmpb;TCON |= 11;/更新 TCNTB0 TCMPB0TCON &= (11);/清手动更新位TCON |= (10)|(1 0;count-)for(i=0;i loop; i+) j+; void main(void)GPD0CON = (GPD0CON & (0xF 0)|0x2;/控制 GPD00 作为 TOUT_0 的输出专业文档供参考，如有帮助请下载。MP0_4CON= (MP0_4CON & 0xFFFF0000) | 0x11110000;MP0_4DAT|= 0xF0;init_clock();/ 初始化时钟init_timer(62500,4