1. 导入Easy5509开发板的例程EX02_TIME，5509有2个16位的定时器，有点少啊
2. 直接编译，提示找不到CSL.h，其实我也好奇，CSL库是从哪里来的？RTS库从哪里来的？头文件在哪里？上个实验的时候，我发现CSL有个安装包，去官网找了一下安装包http://www.ti.com/tool/sprc133
3. 安装CSL库，在CCS中增加头文件搜索路径，程序编译通过。
4. 看下主程序，主程序比较简单，有几个关键点，包含的库文件
1 #include <stdio.h> 2 #include <csl.h> 3 #include <csl_irq.h> 4 #include <csl_timer.h> 5 #include <csl_chiphal.h> 6 7 extern void VECSTART(void); 8 9 #define TIMER_CTRL TIMER_TCR_RMK( 10 TIMER_TCR_IDLEEN_DEFAULT, /* IDLEEN == 0 */ 11 TIMER_TCR_FUNC_OF(0), /* FUNC == 0 */ 12 TIMER_TCR_TLB_RESET, /* TLB == 1 */ 13 TIMER_TCR_SOFT_BRKPTNOW, /* SOFT == 0 */ 14 TIMER_TCR_FREE_WITHSOFT, /* FREE == 0 */ 15 TIMER_TCR_PWID_OF(0), /* PWID == 0 */ 16 TIMER_TCR_ARB_RESET, /* ARB == 1 */ 17 TIMER_TCR_TSS_START, /* TSS == 0 */ 18 TIMER_TCR_CP_PULSE, /* CP == 0 */ 19 TIMER_TCR_POLAR_LOW, /* POLAR == 0 */ 20 TIMER_TCR_DATOUT_0 /* DATOUT == 0 */ 21 ) 22 23 TIMER_Config timCfg0 = { 24 TIMER_CTRL, /* TCR0 */ 25 0x3400u, /* PRD0 */ 26 0x0000 /* PRSC */ 27 }; 28 29 30 Uint16 eventId0; 31 32 TIMER_Handle mhTimer0; 33 34 volatile Uint16 timer0_cnt = 0; 35 36 /* Function/ISR prototypes */ 37 interrupt void timer0Isr(void); 38 void taskFxn(void); 39 40 int old_intm; 41 Uint16 tim_val; 42 Uint16 xfchange = 0; 43 Uint16 ms,f; 44 45 void main(void) 46 { 47 /* Initialize CSL library - This is REQUIRED !!! */ 48 /*CLS库的初始化，这是必需的*/ 49 CSL_init(); 50 51 /* Set IVPH/IVPD to start of interrupt vector table */ 52 /*修改寄存器IVPH，IVPD，重新定义中断向量表*/ 53 IRQ_setVecs((Uint32)(&VECSTART)); 54 55 /* Temporarily disable all maskable interrupts */ 56 /*禁止所有可屏蔽的中断源*/ 57 old_intm = IRQ_globalDisable(); 58 59 /* Open Timer 0, set registers to power on defaults */ 60 /*打开定时器0，设置其为上电的的默认值，并返回其句柄*/ 61 mhTimer0 = TIMER_open(TIMER_DEV0, TIMER_OPEN_RESET); 62 63 /* Get Event Id associated with Timer 0, for use with */ 64 /* CSL interrupt enable functions. */ 65 /*获取定时器0的中断ID号*/ 66 eventId0 = TIMER_getEventId(mhTimer0); 67 68 /* Clear any pending Timer interrupts */ 69 /*清除定时器0的中断状态位*/ 70 IRQ_clear(eventId0); 71 72 /* Place interrupt service routine address at */ 73 /* associated vector location */ 74 /*为定时器0设置中断服务程序*/ 75 IRQ_plug(eventId0,&timer0Isr); 76 77 /* Write configuration structure values to Timer control regs */ 78 /*设置定时器0的控制与周期寄存器*/ 79 TIMER_config(mhTimer0, &timCfg0); 80 81 /* Enable Timer interrupt */ 82 /*使能定时器的中断*/ 83 IRQ_enable(eventId0); 84 85 /* Enable all maskable interrupts */ 86 /*设置寄存器ST1的INTM位，使能所有的中断*/ 87 IRQ_globalEnable(); 88 89 /* Start Timer */ 90 /*启动定时器0*/ 91 TIMER_start(mhTimer0); 92 93 //以下是原来的TIMER子段 94 f=210; 95 ms=0; 96 for(;;) 97 { 98 // Wait for at least 10 timer periods 99 //等待10个定时周期 100 if(xfchange == 0) 101 { 102 //点亮XF的LED 103 CHIP_FSET(ST1_55,XF,1); 104 } 105 else 106 { 107 //关掉XF的LED 108 CHIP_FSET(ST1_55,XF,0); 109 } 110 } 111 126 /* Restore old value of INTM */ 127 /*恢复INTM旧的值*/ 128 IRQ_globalRestore(old_intm); 129 130 /* We are through with timer, so close it */ 131 /*关掉定时器0*/ 132 TIMER_close(mhTimer0); 133 }
5. 中断服务函数
1 interrupt void timer0Isr(void) 2 { 3 ms++; 4 ++timer0_cnt; 5 if(timer0_cnt == f) 6 { 7 xfchange = 1; 8 f=f-3; 9 if(f==0) 10 f=210; 11 } 12 if(timer0_cnt == 2*f) 13 { 14 timer0_cnt = 0; 15 xfchange = 0; 16 f=f-3; 17 if(f==0) 18 f=210; 19 } 20 }