I2C.rar_c builder

/*************************************************************************** Author : ADI - Apps www.analog.com/MicroConverter Date : Sept. 2005 File : I2C_Master.c Hardware : Applicable to ADuC702x rev H or I silicon Currently targetting ADuC7026. Description : I2C master to demonstrate with I2C_Slave.c Operates in two modes, read & write (called recieve and transmit here). At the begining of an I2C transmission, the Master sends an address. The LSB of this address determines if the Master is to read (1) or write (0). ***************************************************************************/ #include<ADuC7020.h> void delay(int); void My_IRQ_Function(); #define count 0x4; // Number of bytes to be recieved - 1 int i = 0, dat[5]; // Size of dat should be (count + 1) int main() { GP1CON = 0x22; // I2C on P1.0 and P1.1 I2C0CFG = 0x82; // Master Enable & Enable Generation of Master Clock // I2C-Master setup I2C0DIV = 0xCFCF; // 0x3232 = 400kHz // 0xCFCF = 100kHz IRQ = My_IRQ_Function; // Specify Interrupt Service Routine IRQEN = 0x400; // I2C0 Master Interupt // Transmit I2C0ADR = 0xA0; // set i2c address (LSB = 0, Master Write) I2C0MTX = 0x55; // send i2c byte address delay(1500); // Recieve i = 0; I2C0CNT = count; // Number of bytes to be read from slave I2C0ADR = 0xA1; // set i2c address (LSB = 1, Master Read) while (1) { }; return 0; } void delay (int length) { while (length >0) length--; } /*************************************************/ /*************************************************/ /************ IRQ Service Routine *************/ /*************************************************/ /*************************************************/ void My_IRQ_Function() { // Transmit if(((I2C0MSTA & 0x4) == 0x4) && (i < 8)) // Master Transmit IRQ { i++; // Transmits numbers 1-8 I2C0MTX = i; } // Receive if((I2C0MSTA & 0x8) == 0x8) // Master Recieve IRQ { dat[i] = I2C0MRX; i++; } }