avr

问题 I receive data from USB to the internal memory of Atxmega 128A1 if ( (SWITCHPORTL.IN & PIN1_bm) == 0 ) { j = 0; while (j < NUM_BYTES) { // Wait till there is unread data in the receive buffer while((USART.STATUS & USART_RXCIF_bm) == 0 ){}; // Read out the received data __far_mem_write(j+SDRAM_ADDR, USART.DATA); if (j == (NUM_BYTES-1)) { // Toggle LED 1 LEDPORT.OUTTGL = PIN1_bm; } j++; } } How to write code for transfer data from internal memory via SPI Master to two slaves such that odd and

问题 I have an AT90USB162 Minimus AVR which I want to integrate into a project. I downloaded the demo code from Minimus USB. This is a driver for using the AVR as a COM port. The project is written for AVR Studio 4, and cannot be loaded as-is in AVR Studio 5. How can I convert the project for use with AVR Studio 5? 回答1: Well, I just got to build the package. The problem is that the original sources were configured to be built in AVR Studio v.4, and mine is v.5, so I had to convert them to my

问题 I'm trying to put my AtTiny 13 to sleep and wake it up with interrupt. It does go to sleep but it never wakes up. The whole code: #include <avr/io.h> #include <avr/interrupt.h> #include <stdbool.h> #include <avr/sleep.h> #define RED (1<<PB4) #define RED_HIGH PORTB |=RED #define RED_LOW PORTB &= ~RED #define RED_TOG PORTB ^= RED #define BUTTON 1<<PB1 volatile static bool is_sleeping; ISR(INT0_vect) { RED_TOG; is_sleeping = true; } int main(void){ GIMSK |= 1<<INT0; MCUCR |= 0<<ISC00 | 1<<ISC01;

问题 I have an ATtiny25v connected to a raspberry pi thtough SPI. I use avr-gcc to compile my code. Then I use avrdude to upload it. But I encounter a very strange phenomena : the main function is not called, and instead, the first instructions of the first function have effects on gpio... I have a led connected on portb4. ...I tried with several chip of the same model, and they all behave the same (excluding a buggy one) ...Can someone explain it ? NOTE : I omitted to detail it, but neither the

问题 I have a header file lcd.h with this (shortened): #pragma once // ... const uint8_t LCD_ROW_ADDR[] = {0x00, 0x40, 0x14, 0x54}; // ... other prototypes and macros... And a file lcd.c where this variable is used: #include <stdbool.h> #include <stdint.h> // ... #include "lcd.h" // ... /** Set cursor position */ void lcd_xy(const uint8_t x, const uint8_t y) { lcd_set_addr(LCD_ROW_ADDR[y] + (x)); } I include lcd.h in main.c , and lcd.c is compiled separately using makefile. I'm getting this error:

问题 In AVR32 Studio (2.6) I'm trying to debug an AVR project and I get the error message "Launch failed as no binaries could be found". I can see in the console that Build is complete (an executable .elf file is in the build folder) and I've cleaned my project, created a new build configuration and I still can't seem to launch (and or program the chip) the debugger. 回答1: Check your debug launch configuration . It ought to be a little more intuitive, but is not. After you create and build your

问题 I'm using makefile style compiling of my ATMEGA projects. As legacy of Arduino IDE, develepment toolchain is mostly aimed to gcc 4.3.2. Avrstudio 4.19 + Jtagice MKII CN + gcc 4.3.2 + make works somehow. But my problem is that gcc 4.3.2 is rather buggy. I see e.g. random bugs related to optimization of non-volatile variables, register cached values are not always written back to memory and also wrong warning are annoying. Hence using gcc 4.7.0 solves problem but I cannot load any such a

问题 I have designed a calculator through bascome avr and proteus, but some numbers in keypad dont work correctly. just 1 , 4 and 7 work nice. 2 and 3 show 1, 5 and 6 show 4, 8 and 9 show 7! where is the problem? My bascom code: $regfile = "M32DEF.DAT" $crystal = 8000000 Config Kbd = Portd Config Lcdpin = Pin , Db4 = Pinb.4 , Db5 = Pinb.5 , Db6 = Pinb.6 , Db7 = _ Pinb.7 , Rs = Pinb.2 , E = Pinb.3 Config Lcd = 20 * 2 Dim A As Single Dim B As Single Dim S As Byte Dim Yab As Single Dim X As Byte Dim

问题 I am debugging a program that I have written for the AVR architecture and compiled using avr-gcc with the -g argument. I launch simulavr using the following command: simulavr --device atmega8 --gdbserver Then I invoke avr-gdb and do (gdb) file main.elf as well as (gdb) target remote localhost:1212 Once debugging has started, I can successfully step through the assembly portion of my program .init et al. However, once jmp main is executed and a call to another function is made, simulavr throws

问题 How to received string in uart. I am using avr studio 5 and brays terminal like this one Same as this picture I am using baudrate of 9600. Went I try to type "abcdef" , it only come out "abcf" . My code are like this ---> #include <avr/io.h> void serial_init(void) { UBRRH = 0x00; UBRRL = 95; //baudrate 9600 and F_CPU 14745600UL UCSRB = (1 << RXEN) | (1 << TXEN) | (1<<RXCIE); UCSRC = (1<<URSEL)|(1<<USBS)|(3<<UCSZ0)|(1 << UCSZ1); } unsigned long long Usart_Receive(void) { while((UCSRA & (1 <<