Iar Embedded Workbench For 8051 //top\\

// UART receive interrupt #pragma vector = 4 // UART interrupt (address 0x0023) __interrupt void uart_isr(void) if(RI) char c = SBUF; RI = 0; uart_putchar(c); // echo back // process received char

| Optimization flag | Effect | Code size saving | |------------------|--------|------------------| | --optimize=size | Enable size optimizations | 20–30% | | --no_unroll_loops | Disable loop unrolling | 5–10% | | --merge_duplicate_strings | Merge identical string literals | 2–5% | | --use_const_ptr | Use const for pointers to data | 5–8% | | --data_model=__xdata | Force all variables to xdata | 10–15% (but slower) | iar embedded workbench for 8051

Note: Results vary with 8051 derivative and optimization level. // UART receive interrupt #pragma vector = 4

// Stack placement -D_CSTACK_SIZE=0x40 -D_IRQ_STACK_SIZE=0x20 RI = 0

This guide provides a basic introduction to using IAR Embedded Workbench for 8051 development. For more detailed information and specific instructions, refer to the IAR Embedded Workbench user manual and other documentation.