当代码从C18移植到XC8时，PWM停止工作

我生产的基于C18的代码工作得很好。在转换为XC8 1.43之后，PWM功能停止工作。其他一切都有效。我比较了代码，在运行时捕获SFR，但是找不到罪魁祸首。有人有什么建议吗？下面是主要的配置代码。C18基和XC8基是完全相同的：…..定义LCDBKBLUT T6CONtiTS。TMR6on on定义LCDYBKLITE TIIS TrISABITITS。TISISA0定义BuZiPin LababITIt。LATA1定义BuZY-CTR T4CONTITS。TMR4ON定义BuZY-CrrTr3TrISABITS。TrISA1…//VistueStase=配置时间。R4CCP3 PWM为蜂鸣器，用于蜂鸣器，＝PIR3BITS。TMR4IF＝0；/ /清除溢出标志PSTR2CONC= 0B000 000 01；/ /选择PWM通道A，PxA（电源断电）RPOR1＝22；/ /指派RP1到功能22（CCP3/P3A，PWM输出）PR4= 0x0B11111111；//PWM周期＝[PRX+10]·4：（1 /16MHz）·（预分频）（976）（HZ）CCPR3L＝0；/PWM占空比＝0% CCP3CON＝0B000 000 1100；T4CONN＝0 B000 000 011；/PrimCale 16，定时器使能CCTPTMRS0＝0B0100000；//ECCP3使用Time3（捕获/比较）和Time4（PWM）//Eclipse } =配置LCD背光灯的Time6CCP2 PWM。R2CONN＝0B000 000 01；//选择PWM信道A，PxA（上电缺省）RPOR0＝18；/ /分配RP0至函数18（CCP2/2A，PWM输出）PR6= 0x0B11111001；/PWM周期＝[PRX＋1 ]·4（1 / 16MHz）·（预分频）（40Hz）CCPR2L= 0B10101110；//PWM占空比（CCPRXL:CCPXCON＆LT；5:4＆GT）·（1／16MHz）·Prescale（70%）CCP2CON＝0B0111100；/ /启用CCP2上的PWM，单输出T6CON＝0B000 000 101；//预分频器4，使定时器CCTPMRS0＝0B000 010000；//ECCP2使用Time3（捕获/比较）和Time6（PWM）…LCDY-BKLITY-TrIS＝0；BuZY-CrTrTrIS＝0；…



      以下为原文

    My production C18-based code works perfectly. After I converted to XC8 1.43, PWM function stops working. Everything else works. I have compared code, captured SFR in run time, but couldn't find the culprit. Does anyone have any suggestion? Below are the major configuring code.

C18-based and XC8-base are exact the same as below:
...
#define LCD_BKLIGHT T6CONbits.TMR6ON
#define LCD_BKLIGHT_TRIS TRISAbits.TRISA0
#define BUZ_PIN LATAbits.LATA1
#define BUZ_CTR T4CONbits.TMR4ON
#define BUZ_CTR_TRIS TRISAbits.TRISA1
...
//====== Configuring Timer4 CCP3 PWM for buzzer =====================
PIR3bits.TMR4IF = 0;// clear overflow flag
PSTR2CON = 0b00000001; // select PWM channel A, PxA (power-on default)
RPOR1 = 22; // assign RP1 to function 22 (CCP3/P3A, PWM Output)
PR4 = 0x0b11111111; // PWM Period= [PRx+1]•4•(1/16MHz)•(Prescale) (976Hz)
CCPR3L = 0; // PWM duty=0%
CCP3CON = 0b00001100;
T4CON = 0b00000111; // prescale 16, timer is enable
CCPTMRS0 |= 0b01000000; // ECCP3 uses Timer3 (capture/compare)and Timer4 (PWM)
//====== Configuring Timer6 CCP2 PWM for LCD backlight =============
PIR5bits.TMR6IF = 0; // clear overflow flag
PSTR2CON = 0b00000001; // select PWM channel A, PxA (power-on default)
RPOR0 = 18; // assign RP0 to function 18 (CCP2/P2A, PWM Output)
PR6 = 0x0b11111001; // PWM Period= [PRx+1]•4•(1/16MHz)•(Prescale) (4000Hz)
CCPR2L = 0b10101110; // PWM duty= (CCPRxL:CCPxCON<5:4>)•(1/16MHz)•Prescale (70%)
CCP2CON = 0b00111100; // Enable PWM on CCP2, single output
T6CON = 0b00000101; // prescale 4, enable timer
CCPTMRS0 |= 0b00010000; // ECCP2 uses Timer3 (capture/compare)and Timer6 (PWM)
...
LCD_BKLIGHT_TRIS = 0;
BUZ_CTR_TRIS = 0;
...