if(TI) // optional: TI handled in polling mode
led_counter++; if(led_counter >= 500) P1 ^= 0x01; // toggle LED on P1.0 led_counter = 0; iar embedded workbench for 8051
This document covers architecture, key features, workflow, code examples, and debugging. 1. Overview IAR Embedded Workbench for 8051 is a proprietary high-performance C/C++ compiler and debugger toolchain for all 8051-derivative microcontrollers (Intel MCS-51 architecture and variants like Silicon Labs, Nuvoton, Analog Devices, Texas Instruments, etc.). if(TI) // optional: TI handled in polling mode
// 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 // UART receive interrupt #pragma vector = 4
void uart_init(u32 baud) SCON = 0x50; // mode 1, 8-bit UART, receive enable TMOD
// Good: use smallest data type, static, const static const __code u8 sine_table[256] = /* ... */ ; // Good: reuse variables u8 temp __data; // fast