Imagecraft c compiler and development environment for the atmel avr

More documents

Recommendations

Info

ICCV8 for AVR – C Compiler for Atmel AVR#pragma interrupt_handler timer0_handler: iv_TIMER0_OVF#pragma interrupt_handler eep_handler: iv_EE_READY#pragma interrupt_handler adc_handler: iv_ADCSince interrupt vector number names are defined in the header file, they can easily bechanged for another target AVR by including another header file. New targets mustmeet hardware requirements, of course. For names supported by a distinct header,see the avr_c_lst and mega_c_lst files in the ICCV8 for AVR include directory.Assembly Interrupt HandlersYou may write interrupt handlers in assembly. However, if you call C functions inside yourassembly handler, the assembly routine must save and restore the volatile registers (seeAssembly Interface and Calling Conventions), since the C functions do not (unless theyare declared as interrupt handlers, but then they should not be called directly).If you use assembly interrupt handlers, you must define the vectors yourself. Use theabs attribute to declare an absolute area (see Assembler Directives) and use the.org statement to assign the rjmp or jmp instruction at the right location. Note thatthe .org statement uses byte address.; for all but the ATMega devices.area vector(abs) ; interrupt vectors.org 0x6rjmp _timer; for the ATMega devices.area vector(abs) ; interrupt vectors.org 0xCjmp _timerAsm header files aioXXXX.s support macros for symbolic interrupt vector definition.Syntax:set_vector_ with as in AVR data sheets and equal to theuser's asm ISR. Examples:set_vector_TIMER0_OVF t0_asm_handlerset_vector_ADCadc_asm_handlerset_vector_UART0_DRE u0dre_asm_handlerDepending on target macro expansion may result in different code. For namessupported by distinct headers, see the avr_asm_lst and mega_asm_lst files in theICCAVR include directory.134
ICCV8 for AVR – C Compiler for Atmel AVRAccessing the UART, EEPROM, SPI, and Other PeripheralsThe Application Builder generates initialization code for you using a point and clickinterface, making it easy to use the peripherals built into the AVR. In addition, sourcecode to some high-level functions is provided in the EXAMPLES directory(c:\iccv8avr\examples.avr, where c:\iccv8avr is the root of yourinstallation). To use them, copy the source files to your working directory and makeany necessary modifications. Many of these files are written by ImageCraft customers.There may be more examples provided than the ones listed in here. Please check thedirectory for details.UARTThe default library functions getchar and putchar reads and writes to the UARTusing polled mode. In the c:\iccv8avr\examples.avr directory, a set of interruptdriven buffered IO routines are provided; you may use them instead of the defaultroutines.EEPROMA set of macros and functions are available. See Accessing EEPROM. Normalaccessing functions are included in the library, and real-time accessing functions areprovided in the files rteeprom.h and rteeprom.c in the EXAMPLES directory.SPIThe files spi.c and spi.h in the EXAMPLES directory contain example sourcecode. Use the Application Builder to generate the SPI initialization function.LCDThe file lcd.zip in the EXAMPLES directory contains source code and a demoprogram for a standard Hitachi or Toshiba and other compatible text LCD controller.I2CThe file lcd.zip in the EXAMPLES directory contains source code and a demoprogram for driving the I2C in Master mode.135
Page 2 and 3:
ICCV8 for AVR - C Compiler for Atme
Page 4:
Page 8 and 9:
Page 10 and 11:
Page 12 and 13:
Page 14 and 15:
Page 16 and 17:
Page 18 and 19:
Page 20 and 21:
Page 22 and 23:
Page 24 and 25:
Page 26 and 27:
Page 28 and 29:
Page 30 and 31:
Page 32 and 33:
Page 34 and 35:
Page 36 and 37:
Page 38 and 39:
Page 40 and 41:
Page 42 and 43:
Page 44 and 45:
Page 46 and 47:
Page 48 and 49:
Page 50 and 51:
Page 52 and 53:
Page 54 and 55:
Page 56 and 57:
Page 58 and 59:
Page 60 and 61:
Page 62 and 63:
Page 64 and 65:
Page 66 and 67:
Page 68 and 69:
Page 70 and 71:
Page 72 and 73:
Page 74 and 75:
Page 76 and 77:
Page 78 and 79:
Page 80 and 81:
Page 82 and 83:
Page 84 and 85: ICCV8 for AVR - C Compiler for Atme
Page 165 and 166: TOOL REFERENCESMISRA / Lint Code Ch
Page 184 and 185:
Page 186 and 187:
Page 188 and 189:
Page 190 and 191:
Page 192 and 193:
Page 194 and 195:
Page 196 and 197:
Page 198 and 199:
Page 200 and 201:
Page 202 and 203:
Page 204:
show all

Imagecraft c compiler and development environment for the atmel avr

Create successful ePaper yourself

Delete template?

Save as template?