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<br /><br /><br />２个问题：<br />１：我买了您的开发板LM3S615 ， 我用于做逆变电源项目，需要逐周期更新占空比，您的demo 没有带PWM 在中断中更新占空值的例程，自己作了pwm的初始化就是不进中断为什么，能给个例程么？<br />２：您给的crossstudio for arm是测试版，期限是一个月我想知道一个月之后我该怎么办？<br /><br /><br /><br /> <br /> 我的初始化程序 <br /><br /> HWREG(SYSCTL_RCC) &= (~SYSCTL_RCC_USE_PWMDIV); // PWM时钟源1分频 <br /> HWREG(SYSCTL_RCGC2) |= SYSCTL_PERIPH_GPIOD; // 使能PD口外设 <br /> HWREG(SYSCTL_RCGC0) |= SYSCTL_PERIPH_PWM; // 使能PWM外设<br /> IntMasterEnable(); // 处理器使能。<br /> HWREG(GPIO_PORTD_BASE + GPIO_O_DIR) |= 0x00000003; // 设置PD0,PD1为输出<br /> HWREG(GPIO_PORTD_BASE + GPIO_O_AFSEL) |= 0x00000003; // 选择硬件功能，即PWM<br /> // 设置PWM发生器0为上下计数方式，两路PWM不同步 <br /> HWREG(PWM_BASE + PWM_GEN_0_OFFSET + PWM_O_X_CTL ) &= (~0x0000003F);<br /> HWREG(PWM_BASE + PWM_GEN_0_OFFSET + PWM_O_X_CTL ) |= PWM_GEN_MODE_UP_DOWN;<br /> HWREG(PWM_BASE + PWM_GEN_0_OFFSET + PWM_O_X_GENA) &=(~0x00000FFF);<br /> HWREG(PWM_BASE + PWM_GEN_0_OFFSET + PWM_O_X_GENA) |=((PWM_GEN_ACT_ONE<<PWM_GEN_ACT_A_UP_SHIFT)|<br /> (PWM_GEN_ACT_ZERO<<PWM_GEN_ACT_A_DN_SHIFT));<br /> HWREG(PWM_BASE + PWM_GEN_0_OFFSET + PWM_O_X_GENB) &=(~0x00000FFF); <br /> HWREG(PWM_BASE + PWM_GEN_0_OFFSET + PWM_O_X_GENB) |=((PWM_GEN_ACT_ONE<<PWM_GEN_ACT_B_UP_SHIFT)|<br /> (PWM_GEN_ACT_ZERO <<PWM_GEN_ACT_B_DN_SHIFT));<br /><br /> HWREG(PWM_BASE + PWM_GEN_0_OFFSET + PWM_O_X_LOAD) = 84; // 设置两路PWM的共同周期 <br /> HWREG(PWM_BASE + PWM_GEN_0_OFFSET + PWM_O_X_CMPA) = 40; // 分别设置两路PWM的匹配值<br /> HWREG(PWM_BASE + PWM_O_ENABLE) |= 0x00000003; // 使能PWM0和PWM1输出到引脚<br /> HWREG(PWM_BASE + PWM_GEN_0_OFFSET+PWM_O_X_DBRISE) = 2; // Gen DB Rising Edge Delay Reg<br /> HWREG(PWM_BASE + PWM_GEN_0_OFFSET+PWM_O_X_DBFALL) =2; // Gen DB Falling Edge Delay Reg<br /> HWREG(PWM_BASE + PWM_GEN_0_OFFSET+PWM_O_X_DBCTL)|= 1; // Gen Dead Band Ctrl Reg <br /><br /> //HWREG(PWM_BASE + PWM_GEN_0_OFFSET+PWM_O_X_INTEN)|= 1; //清中断标志位<br /> HWREG(PWM_BASE + PWM_GEN_0_OFFSET+PWM_O_X_INTEN)|= 1; //计数器为零允许产生中断<br /> <br /> HWREG(PWM_BASE +PWM_O_INTEN)|=1; //PWM控制模块的全局中断允许<br />//PWMGenIntTrigEnable(PWM_BASE, PWM_GEN_0,PWM_INT_CNT_ZERO ); //jihuo <br /> <br /> HWREG(PWM_BASE + PWM_GEN_0_OFFSET + PWM_O_X_CTL ) |= 0x00000001;// 使能PWM发生器0<br /> <br /><br /><br /><br /> <br /> <br /><br /> 我的初始化程序第２种方法 <br /><br />SysCtlPWMClockSet(SYSCTL_PWMDIV_1); // PWM时钟源1分频 <br /> <br /> SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOD); // 使能PD口外设 <br /> <br /> <br /> SysCtlPeripheralEnable(SYSCTL_PERIPH_PWM); // 使能PWM外设<br /> IntMasterEnable(); // 处理器使能。<br /> <br /> GPIOPinTypePWM(GPIO_PORTD_BASE, GPIO_PIN_0 | GPIO_PIN_1 );// 设置PD0,PD1为PWM0和PWM1<br /> <br /> PWMGenConfigure(PWM_BASE, PWM_GEN_0, // 设置PWM发生器0为上下计数方式，两路PWM不同步 <br /> PWM_GEN_MODE_UP_DOWN | PWM_GEN_MODE_NO_SYNC);<br /> <br /> PWMGenPeriodSet(PWM_BASE, PWM_GEN_0, 84); // 设置两路PWM的共同周期 <br /><br /> PWMPulseWidthSet(PWM_BASE, PWM_OUT_0,30); // 分别设置两路PWM的匹配值<br /> <br /> <br /> PWMOutputState(PWM_BASE, PWM_OUT_0_BIT | PWM_OUT_1_BIT, true);// 使能PWM0和PWM1<br /> <br /> PWMDeadBandEnable(PWM_BASE,PWM_GEN_0,5,5); //使能死区<br /> <br /><br /><br /> <br /> //PWMIntEnable(PWM_BASE,PWM_INT_GEN_0); // 使能中断PWM_GEN_0/////???<br /> <br /> PWMGenEnable(PWM_BASE, PWM_GEN_0); // 使能PWM发生器0<br /> <br /> <br /> //PWMGenIntRegister(PWM_BASE,PWM_GEN_0 ,PWM_Generator_0_ISR);//PWM_GEN_0,PWM_Generator_0_ISR()); //chulihanshu<br /><br /> PWMGenIntTrigEnable(PWM_BASE, PWM_GEN_0,PWM_INT_CNT_ZERO); //| PWM_INT_CNT_LOAD); //jihuo <br /> <br /> <br /> IntEnable(INT_PWM0 ); // 使能中断<br /> IntEnable(PWM_GEN_0); // 使能中断<br /><br /> <br /> <br /> |
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