Re: [問題] atmega 168 MCU 通訊問題

看板ASM (組合語言)作者easypro時間10年前 (2015/03/04 22:48)推噓0(0推 0噓 1→)

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//F_CPU 7.327Mhz //IDE: avrstudio418setup.exe //complier: WinAVR-20100110-install.exe #include <avr/io.h> #include <avr/interrupt.h> #include <avr/wdt.h> #include "global.h" #include <stdio.h> #define UART0_DEFAULT_BAUD_RATE 9600 ///< default baud rate for UART0 #define UART1_DEFAULT_BAUD_RATE 9600 ///< default baud rate for UART1 //Timerout Count use TCC1 #define TimerReg TCCR1A #define TimerCountReg TCNT1 #define DisableTimerOut TCCR1B &= ~BV(CS32) | ~BV(CS31) | ~BV(CS30) // Clk/256 7.372MHz/1024 => #define EnableTimerOut \ do{ \ TCCR1B |= (1 << CS12) | (1 << CS10); \ TCNT1 = 0;\ }while(0); #define TimeOut (TCNT1 > 2160) #ifndef RXCIE #define RXCIE RXCIE0 #define TXCIE TXCIE0 #define UDRIE UDRIE0 #define RXEN RXEN0 #define TXEN TXEN0 #define CHR9 CHR90 #define RXB8 RXB80 #define TXB8 TXB80 #endif #ifndef UBRR0L #define UBRR0L UBRR0 #define UBRR1L UBRR1 #endif //RX interrupt-> RX Get Data-> Data to Tx Send int main(void) { MCUCSR = 0; uart0Init(UART0_DEFAULT_BAUD_RATE); uart1Init(UART1_DEFAULT_BAUD_RATE); sei(); //enable global interrupt while(1) { wdt_reset(); //your program { } } } void uart0Init(unsigned long baudrate) { PORTE |= (1 << PORTE1) | (1 << PORTE0) ; uartSetBaudRate(0, baudrate); //outb(UCSR0B, BV(RXCIE0)|BV(TXCIE0)|BV(RXEN0)|BV(TXEN0)); outb(UCSR0B, BV(RXCIE0)|BV(RXEN0)|BV(TXEN0)); //sei(); } void uart1Init(unsigned long baudrate) { PORTD |= (1 << PORTD3) | (1 << PORTD2) ; uartSetBaudRate(1, baudrate); //outb(UCSR0B, BV(RXCIE0)|BV(TXCIE0)|BV(RXEN0)|BV(TXEN0)); outb(UCSR1B, BV(RXCIE1)|BV(RXEN1)|BV(TXEN1)); //sei(); } void uartSetBaudRate(unsigned char uart_sel, unsigned long baudrate) { // calculate division factor for requested baud rate, and set it unsigned int bauddiv = ((F_CPU+(baudrate*8L))/(baudrate*16L)-1); if(uart_sel) { outb(UBRR1L, bauddiv); #ifdef UBRR1H outb(UBRR1H, bauddiv>>8); #endif } else { outb(UBRR0L, bauddiv); #ifdef UBRR0H outb(UBRR0H, bauddiv>>8); #endif } } //uart_sel = 0 use uart0, uart_sel = 1 use uart1 void uartSendByte(unsigned char uart_sel, unsigned char txData) { if(uart_sel) { while(!(UCSR1A & (1<<UDRE))); outb(UDR1, txData); } else { while(!(UCSR0A & (1<<UDRE))); outb(UDR0, txData); } } unsigned char uartReceiveByte(unsigned char uart_sel) { TimerCountReg = 0; EnableTimerOut; if(uart_sel == 0) { while(!(UCSR0A & (1<<RXC0))) { if(TimeOut){ break; } } DisableTimerOut; return UDR0; } else { while(!(UCSR1A & (1<<RXC1))) { if(TimeOut){ break; } } DisableTimerOut; return UDR1; } } //UART0 RX reevied ISR vector ISR(USART0_RX_vect) { cli(); wdt_reset(); UCSR0B &= ~(1 << RXCIE0); //Disable UART0 RX intperrupt. uartSendByte(0, uartReceiveByte(0)); UCSR0B |= (1 << RXCIE0); //Enable UART0 RX intperrupt. wdt_reset(); sei(); } //UART1(Ethernet) RX reevied ISR vector ISR(USART1_RX_vect) { cli(); wdt_reset(); UCSR1B &= ~(1 << RXCIE1); //Disable UART1 RX intperrupt. uartSendByte(1, uartReceiveByte(1)); UCSR1B |= (1 << RXCIE1); //Enable UART1 RX intperrupt. wdt_reset(); sei(); } 程式不保證會動..因為就是從以前寫的程式剪下貼上組合出來的。簡單使用ISR，未使用FIFO與OS概念。其他相關請自行google網路，AVR的論壇很講解 http://www.avrfreaks.net/ 因為台灣使用AVR的不算多，所以相關資料大多數為英文與簡體(大陸一堆人再用) -- ※ 發信站: 批踢踢實業坊(ptt.cc), 來自: 118.165.109.151 ※ 文章網址: https://www.ptt.cc/bbs/ASM/M.1425480509.A.DC2.html