Doubt regarding code

I have one Doubt how void uart(void)__irq this function call in this program..........???? #include "lpc21xx.h" // #include "lpc210x.h" #include "stdio.h" #define baudrate_uart1 0x0f //@115200;SYS_CLK...
Doubt regarding code

I have one Doubt how void uart(void)__irq this function call in this program..........???? #include "lpc21xx.h" // #include "lpc210x.h" #include "stdio.h" #define baudrate_uart1 0x0f //@115200;SYS_CLK...
doubt regarding a specific line

how does this specific line of code work? #define HRM_FLAG_MASK_HR_VALUE_16BIT (0x01 << 0) /**< Heart Rate Value Format bit. */
doubt regarding a specific line

how does this specific line of code work? #define HRM_FLAG_MASK_HR_VALUE_16BIT (0x01 << 0) /**< Heart Rate Value Format bit. */
Doubts regarding interfacing of gsm modem with 8051

Hello, I could successfully interfaced GSM modem to PC. now i want to interface the same modem to AT89C51. so can any one please suggest any site where i will get a sample of a program?? actually...