dsp28335杂记1

F28335 的外设中断源

远远不止 12 个，共用 58 个。那么如何将这 58 个外设中断源分配给这 12 个中断线呢，
这就需要 F28335 的 PIE 外设中断扩展模块来完成。

PIE 级中断表。。。。。非常有用

每一组 ePWM 模块

GPIO输出配置LED

void LED_Init(void)
{EALLOW;SysCtrlRegs.PCLKCR3.bit.GPIOINENCLK = 1;// 开启GPIO时钟//LED1端口配置GpioCtrlRegs.GPCMUX1.bit.GPIO68=0;//设置为通用GPIO功能GpioCtrlRegs.GPCDIR.bit.GPIO68=1;//设置GPIO方向为输出GpioCtrlRegs.GPCPUD.bit.GPIO68=0;//使能GPIO上拉电阻//LED2端口配置GpioCtrlRegs.GPCMUX1.bit.GPIO67=0;GpioCtrlRegs.GPCDIR.bit.GPIO67=1;GpioCtrlRegs.GPCPUD.bit.GPIO67=0;//LED3端口配置GpioCtrlRegs.GPCMUX1.bit.GPIO66=0;GpioCtrlRegs.GPCDIR.bit.GPIO66=1;GpioCtrlRegs.GPCPUD.bit.GPIO66=0;//LED4端口配置GpioCtrlRegs.GPCMUX1.bit.GPIO65=0;GpioCtrlRegs.GPCDIR.bit.GPIO65=1;GpioCtrlRegs.GPCPUD.bit.GPIO65=0;//LED5端口配置GpioCtrlRegs.GPCMUX1.bit.GPIO64=0;GpioCtrlRegs.GPCDIR.bit.GPIO64=1;GpioCtrlRegs.GPCPUD.bit.GPIO64=0;//LED6端口配置GpioCtrlRegs.GPAMUX1.bit.GPIO10=0;GpioCtrlRegs.GPADIR.bit.GPIO10=1;GpioCtrlRegs.GPAPUD.bit.GPIO10=0;//LED7端口配置GpioCtrlRegs.GPAMUX1.bit.GPIO11=0;GpioCtrlRegs.GPADIR.bit.GPIO11=1;GpioCtrlRegs.GPAPUD.bit.GPIO11=0;GpioDataRegs.GPCSET.bit.GPIO68=1;GpioDataRegs.GPCSET.bit.GPIO67=1;GpioDataRegs.GPCSET.bit.GPIO66=1;GpioDataRegs.GPCSET.bit.GPIO65=1;GpioDataRegs.GPCSET.bit.GPIO64=1;GpioDataRegs.GPASET.bit.GPIO10=1;GpioDataRegs.GPASET.bit.GPIO11=1;EDIS;
}

GPIO输入配置KEY

void KEY_Init(void)
{EALLOW;SysCtrlRegs.PCLKCR3.bit.GPIOINENCLK = 1;// 开启GPIO时钟//KEY端口配置GpioCtrlRegs.GPAMUX1.bit.GPIO12=0;GpioCtrlRegs.GPADIR.bit.GPIO12=0;GpioCtrlRegs.GPAPUD.bit.GPIO12=0;GpioCtrlRegs.GPAMUX1.bit.GPIO13=0;GpioCtrlRegs.GPADIR.bit.GPIO13=0;GpioCtrlRegs.GPAPUD.bit.GPIO13=0;GpioCtrlRegs.GPAMUX1.bit.GPIO14=0;GpioCtrlRegs.GPADIR.bit.GPIO14=0;GpioCtrlRegs.GPAPUD.bit.GPIO14=0;GpioCtrlRegs.GPBMUX2.bit.GPIO48=0;GpioCtrlRegs.GPBDIR.bit.GPIO48=1;GpioCtrlRegs.GPBPUD.bit.GPIO48=0;GpioCtrlRegs.GPBMUX2.bit.GPIO49=0;GpioCtrlRegs.GPBDIR.bit.GPIO49=1;GpioCtrlRegs.GPBPUD.bit.GPIO49=0;GpioCtrlRegs.GPBMUX2.bit.GPIO50=0;GpioCtrlRegs.GPBDIR.bit.GPIO50=1;GpioCtrlRegs.GPBPUD.bit.GPIO50=0;EDIS;GpioDataRegs.GPBSET.bit.GPIO48=1;GpioDataRegs.GPBSET.bit.GPIO49=1;GpioDataRegs.GPBSET.bit.GPIO50=1;
}char KEY_Scan(char mode)
{static char keyl1=1;static char keyl2=1;static char keyl3=1;//第1列扫描KEY_L1_SetL;KEY_L2_SetH;KEY_L3_SetH;if(keyl1==1&&(KEY_H1==0||KEY_H2==0||KEY_H3==0)){DELAY_US(10000);keyl1=0;if(KEY_H1==0){return KEY1_PRESS;}else if(KEY_H2==0){return KEY4_PRESS;}else if(KEY_H3==0){return KEY7_PRESS;}}else if(KEY_H1==1&&KEY_H2==1&&KEY_H3==1){keyl1=1;}if(mode)keyl1=1;//第2列扫描KEY_L2_SetL;KEY_L1_SetH;KEY_L3_SetH;if(keyl2==1&&(KEY_H1==0||KEY_H2==0||KEY_H3==0)){DELAY_US(10000);keyl2=0;if(KEY_H1==0){return KEY2_PRESS;}else if(KEY_H2==0){return KEY5_PRESS;}else if(KEY_H3==0){return KEY8_PRESS;}}else if(KEY_H1==1&&KEY_H2==1&&KEY_H3==1){keyl2=1;}if(mode)keyl2=1;//第3列扫描KEY_L3_SetL;KEY_L1_SetH;KEY_L2_SetH;if(keyl3==1&&(KEY_H1==0||KEY_H2==0||KEY_H3==0)){DELAY_US(10000);keyl3=0;if(KEY_H1==0){return KEY3_PRESS;}else if(KEY_H2==0){return KEY6_PRESS;}else if(KEY_H3==0){return KEY9_PRESS;}}else if(KEY_H1==1&&KEY_H2==1&&KEY_H3==1){keyl3=1;}if(mode)keyl3=1;return KEY_UNPRESS;
}

外设中断PIE配置

interrupt void EXTI1_IRQn(void)；
void EXTI1_Init(void)
{EALLOW;SysCtrlRegs.PCLKCR3.bit.GPIOINENCLK = 1;    // GPIO input clockEDIS;EALLOW;//KEY端口配置GpioCtrlRegs.GPAMUX1.bit.GPIO12=0;GpioCtrlRegs.GPADIR.bit.GPIO12=0;GpioCtrlRegs.GPAPUD.bit.GPIO12=0;GpioCtrlRegs.GPAQSEL1.bit.GPIO12 = 0;  // 外部中断1（XINT1）与系统时钟SYSCLKOUT同步GpioCtrlRegs.GPBMUX2.bit.GPIO48=0;GpioCtrlRegs.GPBDIR.bit.GPIO48=1;GpioCtrlRegs.GPBPUD.bit.GPIO48=0;GpioDataRegs.GPBCLEAR.bit.GPIO48=1;//LEDIS;EALLOW;GpioIntRegs.GPIOXINT1SEL.bit.GPIOSEL = 12;   // XINT1是GPIO12EDIS;EALLOW;	// 修改被保护的寄存器，修改前应添加EALLOW语句PieVectTable.XINT1 = &EXTI1_IRQn;EDIS;   // EDIS的意思是不允许修改被保护的寄存器PieCtrlRegs.PIEIER1.bit.INTx4 = 1;          // 使能PIE组1的INT4XIntruptRegs.XINT1CR.bit.POLARITY = 0;      // 下降沿触发中断XIntruptRegs.XINT1CR.bit.ENABLE= 1;        // 使能XINT1IER |= M_INT1;                        // 使能CPU中断1（INT1）EINT;                                       // 开全局中断ERTM;
}interrupt void EXTI1_IRQn(void)
{Uint32 i;for(i=0;i<10000;i++);    //键盘消抖动while(!KEY_H1);LED2_TOGGLE;PieCtrlRegs.PIEACK.bit.ACK1=1;
}

定时器0配置，1与2类比即可

interrupt void TIM0_IRQn(void)；//定时器0初始化函数
//Freq：CPU时钟频率（150MHz）
//Period：定时周期值，单位us
void TIM0_Init(float Freq, float Period)
{EALLOW;SysCtrlRegs.PCLKCR3.bit.CPUTIMER0ENCLK = 1; // CPU Timer 0EDIS;//设置定时器0的中断入口地址为中断向量表的INT0EALLOW;PieVectTable.TINT0 = &TIM0_IRQn;EDIS;//指向定时器0的寄存器地址CpuTimer0.RegsAddr = &CpuTimer0Regs;//设置定时器0的周期寄存器值CpuTimer0Regs.PRD.all  = 0xFFFFFFFF;//设置定时器预定标计数器值为0CpuTimer0Regs.TPR.all  = 0;CpuTimer0Regs.TPRH.all = 0;//确保定时器0为停止状态CpuTimer0Regs.TCR.bit.TSS = 1;//重载使能CpuTimer0Regs.TCR.bit.TRB = 1;// Reset interrupt counters:CpuTimer0.InterruptCount = 0;ConfigCpuTimer(&CpuTimer0, Freq, Period);//开始定时器功能CpuTimer0Regs.TCR.bit.TSS=0;//开启CPU第一组中断并使能第一组中断的第7个小中断，即定时器0IER |= M_INT1;PieCtrlRegs.PIEIER1.bit.INTx7 = 1;//使能总中断EINT;ERTM;
}interrupt void TIM0_IRQn(void)
{EALLOW;LED2_TOGGLE;PieCtrlRegs.PIEACK.bit.ACK1=1;EDIS;
}

EPWM配置，外加PIE中断

interrupt void epwm1_timer_isr(void);
void EPWM1_Init(Uint16 tbprd)
{EALLOW;SysCtrlRegs.PCLKCR0.bit.TBCLKSYNC = 1;   // Disable TBCLK within the ePWMSysCtrlRegs.PCLKCR1.bit.EPWM1ENCLK = 1;  // ePWM1EDIS;// Interrupts that are used in this example are re-mapped to// ISR functions found within this file.EALLOW;  // This is needed to write to EALLOW protected registersPieVectTable.EPWM1_INT = &epwm1_timer_isr;EDIS;    // This is needed to disable write to EALLOW protected registersEALLOW;SysCtrlRegs.PCLKCR0.bit.TBCLKSYNC = 0;      // Stop all the TB clocksEDIS;// Setup SyncEPwm1Regs.TBCTL.bit.SYNCOSEL = TB_SYNC_IN;  // Pass through// Allow each timer to be sync'edEPwm1Regs.TBCTL.bit.PHSEN = TB_ENABLE;EPwm1Regs.TBPHS.half.TBPHS = 0;EPwm1Regs.TBPRD = tbprd;EPwm1Regs.TBCTL.bit.CTRMODE = TB_COUNT_UP;    // Count upEPwm1Regs.TBCTL.bit.HSPCLKDIV=TB_DIV1;EPwm1Regs.TBCTL.bit.CLKDIV=TB_DIV1;EPwm1Regs.ETSEL.bit.INTSEL = ET_CTR_ZERO;     // Select INT on Zero eventEPwm1Regs.ETSEL.bit.INTEN = 1;  // Enable INTEPwm1Regs.ETPS.bit.INTPRD = ET_1ST;           // Generate INT on 1st eventEALLOW;SysCtrlRegs.PCLKCR0.bit.TBCLKSYNC = 1;         // Start all the timers syncedEDIS;// Enable CPU INT3 which is connected to EPWM1-6 INT:IER |= M_INT3;// Enable EPWM INTn in the PIE: Group 3 interrupt 1-6PieCtrlRegs.PIEIER3.bit.INTx1 = 1;// Enable global Interrupts and higher priority real-time debug events:EINT;   // Enable Global interrupt INTMERTM;   // Enable Global realtime interrupt DBGM
}interrupt void epwm1_timer_isr(void)
{static Uint16 cnt=0;cnt++;if(cnt==5000){cnt=0;LED3_TOGGLE;}// Clear INT flag for this timerEPwm1Regs.ETCLR.bit.INT = 1;// Acknowledge this interrupt to receive more interrupts from group 3PieCtrlRegs.PIEACK.bit.ACK3 = 1;
}

ADC单路配置

void ADC_Init(void)
{// Specific clock setting for this example:EALLOW;SysCtrlRegs.PCLKCR0.bit.ADCENCLK = 1;    // ADCEDIS;// Specific clock setting for this example:EALLOW;SysCtrlRegs.HISPCP.all = ADC_MODCLK;	// HSPCLK = SYSCLKOUT/(2*ADC_MODCLK)EDIS;InitAdc();  // For this example, init the ADC// Specific ADC setup for this example:AdcRegs.ADCTRL1.bit.ACQ_PS = ADC_SHCLK;AdcRegs.ADCTRL3.bit.ADCCLKPS = ADC_CKPS;AdcRegs.ADCTRL1.bit.SEQ_CASC = 1;        // 1  Cascaded modeAdcRegs.ADCCHSELSEQ1.bit.CONV00 = 0x0;AdcRegs.ADCTRL1.bit.CONT_RUN = 1;       // Setup continuous runAdcRegs.ADCMAXCONV.bit.MAX_CONV1 = 0x0;// Start SEQ1AdcRegs.ADCTRL2.all = 0x2000;}Uint16 Read_ADCValue(void)
{while (AdcRegs.ADCST.bit.INT_SEQ1== 0);AdcRegs.ADCST.bit.INT_SEQ1_CLR = 1;return AdcRegs.ADCRESULT0>>4;
}