数字式开关电源的PID控制

/开关电源的数字化控制 /
/所用拓扑为Buck,单片机msp430/
/PID算法实现开关电源的恒流、恒压、恒功率功能/
/糖coffeeuestc/
/
Part 1
/
include <>
include ""
include ""
include ""
include ""
include ""
include ""
void main void
{
WDTCTL = WDTPW + WDTHOLD;
init_clk;
init_lcd;
GUI_CU;
init_ADC12;
init_TA;
init_TB;
initKey;
_EINT;
while1
{
KeyScan;
ifMode==0 ;PutDigiU%10;PutDigfU/10;;PutDigiI%10;PutDigfI/10;;PutD igfP/10;PutDigfP%10;
}
/处理电压PWM/
void deal_U
{
ifUout>Us100+25||Uout+25<100Us ;PutDigfUs;
}
/显示设置电流/
void DisplaySetI
{
unsigned char iIs,fIs;
iIs = Is/10; fIs = Is%10;
Set_cursor0,3;
PutcLCD'0';PutDigiIs;PutcLCD'.';PutDigfIs;
}
/显示设置功率/
void DisplaySetP
{
unsigned char iPs,fPs;
iPs = Ps/10; fPs = Ps%10;
Set_cursor0,3;
PutDigiPs/10;PutDigiPs%10;PutcLCD'.';PutDigfPs; }
/键盘初始化/
void initKey
{
KeyDIR &= ~Inc + Dec + MOD + ADD + PLU;
}
/键盘检测/
void KeyScan
{
ifKeyIN = 0x1f
{
Delay100;
ifKeyIN = 0x1f
{
unsigned char KeyTemp = KeyIN;
whileKeyIN = 0x1f; //等待按键松开 switchKeyTemp
{
case 0x1e:{
ifMode==0 {Us+=1;}
else ifMode==1 {Is+=1;} else {Ps+=5;}
}break; //+
case 0x1d:{
ifMode==0 {Us-=1;}
else ifMode==1 {Is-=1;} else {Ps-=5;}
}break; //-
case 0x1b:{
Mode++;ifMode>2Mode=0;
ifMode==0 {Us = 10;GUI_CU;}
else ifMode==1 {Is = 10;GUI_CC;} else {Ps = 10; GUI_CP;}
}break; //mod
case 0x17:{
ifMode==0 {Us+=5;}
else ifMode==1 {Is+=2;}
else {Ps+=10;}
}break; //++
case 0x0f:{
ifMode==0 {Us-=5;}
else ifMode==1 {Is-=2;}
else {Ps-=10;}
}break; //--
}
}
}
}
endif
/
Part init Headfile
/
ifndef __init
define __init
/初始化时钟/
void init_clk
{
FLL_CTL0 |= XCAP18PF; // Set load capacitance
FLL_CTL1 &= ~XT2OFF; // Turn on XT2
do
{
IFG1 &= ~OFIFG; // Clear oscillator fault flag
for unsigned int i = 1000; i; i--;
}
while IFG1 & OFIFG; // Test osc fault flag
FLL_CTL1 = SELS; // Select SMCLK source as XT2CLK
}
/初始化AD,计算输出/
void init_ADC12
{
P6SEL = 0x03; // Enable A/D channel inputs
ADC12CTL0 = ADC12ON + MSC + SHT0_8 + REFON + REF2_5V; //Turn on ADC12,set sampling time
ADC12CTL1 = SHP + ADC12SSEL_1 + CONSEQ_1; // Use sampling timer 序列单次
ADC12MCTL0 = INCH_0 + SREF_1;
ADC12MCTL1 = INCH_1 + SREF_1 + EOS;
ADC12CTL0 |= ENC;
}
/初始化TA,采样周期/
void init_TA
{
TACTL = TASSEL_2 + TACLR; // sMCLK, clear TAR
CCTL0 = CCIE; // CCR0 interrupt enabled
CCR0 = 800;
TACTL |= MC_1; // Start Timer_A in UP mode
}
/初始化TB,驱动信号/
void init_TB
{
TBCTL |= TBSSEL_2 + TBCLR + MC_1 + ID_0; // SCLK, Clear Tar TBCCR0 = 400; // PWM = 20K
TBCCTL2 = OUTMOD_7;
TBCCR2 = 200; // CCR2 PWM duty cycle
P2DIR |= BIT3; // output
P2SEL |= BIT3; // TA1 otion }
pragma vector=TIMERA0_VECTOR
__interrupt void Timer_A void
{
ADC12CTL0 |= ADC12SC;
}
endif。