I am trying to start a UART interupt if something is in the receive puffer. After the startup the Processor start his work. If i send something about the uart it jumps into a loop in the exceptions.h and the controller becomes very slow. Please could someone tell if their is any mistake in my code ?.
static unsigned char *fnSetIntHandler(int iVectNumber, unsigned char *new_handler){ extern unsigned long __VECTOR_RAM[]; unsigned char *old_handler; old_handler = (unsigned char *)__VECTOR_RAM[iVectNumber]; __VECTOR_RAM[iVectNumber] = (unsigned long)new_handler; return old_handler; }/* enable UART= interrupt */void init_interrupt_controller(void) { MCF_INTC0_ICR13 |= 0x24; /* 111 111 => IL + IP */ MCF_INTC0_IMRL &= ~(MCF_INTC_IMRL_INT_MASK13 + MCF_INTC_IMRL_MASKALL); /*(Interrupt level + Interrupt priority)*/ // fnSetIntHandler(UART0_VECTOR, (unsigned char *)_SCI0_Interrupt); // enter the handler routine // MCF5XXX_SR |= (MCF5XXX_SR_IPL_5); MCF_UART0_UIMR |= ( MCF_UART_UIMR_RXRDY_FU); //MCF_UART_UIMR_TXRDY // | MCF_UART_UIMR_RXRDY_FU //| MCF_UART_UIMR_DB //| MCF_UART_UIMR_COS); }/* enable interrupts in core's status register */void enable_interrupts (void) { asm { move.l #0x00002000,d0 move.w d0,SR } // Unmask appropriate bits in the core’s status register (SR) to enable interrupts // refer to UM Interrupt Sources ch.15.3.6.1 } __declspec(interrupt:0) void handler_uart0_int (void){ LED_ON(); }
void main (void)
{
fnSetIntHandler(119,(unsigned char*)(*handler_uart0_int));
init_interrupt_controller(); //Mask UART Interrupts
enable_interrupts(); //enable interrupt in core's status register
} Regards
