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HII没有Tx线EASART PIC18F45 K40的数据,因此我在TX线上没有任何数据。我在示波器和扫描逻辑中检查它和结果是相同的:在TX线路中没有数据没有信号。从我的经验与其他设备,我知道TX线应该是高的,即使没有传输TX。检查焊料O做了:和线TX和RX的行为与源指令相同。所以焊锡是好的。你能帮我告诉我为什么会这样吗?特别是为什么他们在TX没有数据?
以上来自于百度翻译 以下为原文 Hi I haven't Data in Tx line EUSART PIC18F45k40. /* * File: main.c */ #include // CONFIG1L #pragma config FEXTOSC = HS // External Oscillator mode Selection bits (HS (crystal oscillator) above 8 MHz; PFM set to high power) #pragma config RSTOSC = EXTOSC // Power-up default value for COSC bits (EXTOSC operating per FEXTOSC bits (device manufacturing default)) // CONFIG1H #pragma config CLKOUTEN = OFF // Clock Out Enable bit (CLKOUT function is disabled) #pragma config CSWEN = ON // Clock Switch Enable bit (Writing to NOSC and NDIV is allowed) #pragma config FCMEN = ON // Fail-Safe Clock Monitor Enable bit (Fail-Safe Clock Monitor enabled)*/ void Delay(unsigned int delay) { while(delay){ delay--; } } void main(void) { OSCCON2bits.COSC0=1; // external oscillator OSCCON2bits.COSC1=1; OSCCON2bits.COSC2=1; ANSELC = 0; // AS DIGITAL // LATC = 0; // ? TRISC = 0x80; //rc7 input rc6 output (RX,TX)) WPUC = 0xC0; // pull up Tx RX ANSELA = 0; // set led as output TRISA =0; LATA = 0; TRISAbits.TRISA0 = 0; // Led 1 TRISAbits.TRISA1 = 0; // Led2 TRISAbits.TRISA2 = 0;// Led3 TRISAbits.TRISA3 = 0;// Led 4 PMD4bits.UART1MD=0; //EUSART1 MODULE ENABLED SP1BRGL=19; // 12mhz for 9600 // Tx register TX1STAbits.TXEN=1; TX1STAbits.SYNC=1; TX1STAbits.BRGH=0; TX1STAbits.CSRC =1; //Rx register RC1STAbits.SPEN=1; RC1STAbits.CREN=0; RC1STAbits.SREN=0; //Enable Receiver (RX) */ BAUD1CONbits.BRG16=0; MDSRCbits.SRCS0 = 1 ; //EUSART1 TX/CK as output MDSRCbits.SRCS1 = 0; MDSRCbits.SRCS2 = 0; MDSRCbits.SRCS3 = 1; while(1) { LATAbits.LATA0 = 1; LATAbits.LATA1 = 1; LATAbits.LATA2 = 0; LATAbits.LATA3 = 0; while(TX1STAbits.TRMT == 0 ) { } TX1REG = 123; // smoething data } return; } In result I don't have any data on Tx line. I check it in oscilloscop and in scan logic and result are the same: No data no signal in Tx line. From my experience with another devices I know Tx line should be high even if there are no transmition Tx.For checking solder o done that: while(1){ TRISC = 0x00; LATCbits.LATC7 = 1; LATCbits.LATC6 = 1; LATCbits.LATC6 = 0; LATCbits.LATC6 = 1; LATCbits.LATC7 = 0;} And line Tx and Rx behave the same as in source instruction. So solder is OK. Could You help and tell me why it behave that? And especially why they no data in TX line? |
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2个回答
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我添加了RC6PPS= 0B01001;一些东西出现在TX线。
以上来自于百度翻译 以下为原文 I added RC6PPS = 0b01001; and something appeared in tx line. |
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