hi all iam using LPC1788 M3 cortex ARM 7 controller iam trying to execute the timer and serial interrupt program. in both the cases iam unable to return from the interrupt handler routine.
iam also working on LPC2378 ARM 7 controller where i have executed both the programs mentioned above. there iam using VICVECTADDR=0 to return from interrupt to main. what is the case in LPC1788? please help. Thanks in advance
main() { // UART TX AND RX LINE SELECTION LPC_GPIO0->P0_0=0X1; LPC_GPIO->P0_1=0X1;
// UART INIT
LPC_UART0->LCR=0X80; // DLAB=1 LPC_UART0->DLL=78;//9600 BAUDRATE LPC_UART0->LCR=0X03;// 8BIT DATA LPC_UART0->IER = 0x01; // interrupt enable
NVIC_ENABLE(UART0_IRQn);
if(ch==0x24) { serial_send("AMS"); }
}
void serial_send(char *ch) { while(*ch!='\0') { while(!(LPC_UART0->LSR & 0x20)); LPC_UART0->THR = *ch; ch++; } }
void UART0_Handler(void) { ch=LPC_UART0->RBR; }
this is my code its not working......... here i am trying to execute interrupt.. when i type $ through keyboard then only it should send string AMS...... but its not coming out from interrupt handler....
when i put the same code which i have written in main i.e if(ch==0x24) in isr then it works fine.....
i dont want to place the code in isr.... i will just monitor ch value from isr if ch equals to dollar then it should come to main and execute the rest of program.....