| ??? 03/17/09 23:35 Read: times |
#163549 - my application code is in C but bootloader in assembly 8051 Responding to: ???'s previous message |
Erik Malund said:
... and saved a lot of hassle by writing the 'vector switch' in assembler, why on earth does that part HAVE to be in C?
Erik Are you suggesting that I add the following code in assembly in my C program? I will leave the bootloader code written in assembly 8051 as it is. I just want to point the ISRs in application code written in C to the right values. I need help pointing the application ISR addresses. Basically I need the "main subroutine" to start at 0x600,"external Interrupt 0" to start at 0x603 and so on. What should I do in C to achieve that? ;----------------------------------------------------------------------------- ; reset and interrupt vector table in APPLICATION CODE STARTING AT 0x600 ;----------------------------------------------------------------------------- cseg at 600h ljmp main org 603h; External Interrupt 0 reti org 60bh ljmp timerr0_isr; timer0 overflow interrupt org 613h reti; External Interrupt 1 org 61bh ;Timer 1 Overflow reti;Timer 1 Overflow org 623h ljmp uart0_isr; uart0 interrupt org 62bh ljmp timer2_isr; timer2 overflow interrupt org 633h ; SPI0 reti org 63Bh ljmp SMBus_ISR; SMBus Interrupt Vector org 643h ; RESERVED reti org 64bh ; ADC0 Window Compare reti org 653h ; ADC0 Conversion Complete reti org 65bh ; Programmable Counter Array reti org 663h ; Comparator0 reti org 66bh ; Comparator1 reti org 673h ljmp timer3_isr; timer3 overflow interrupt |
| Topic | Author | Date |
| Bootloader code in C - ISR locations | 01/01/70 00:00 | |
| I have done something similar ..... | 01/01/70 00:00 | |
| my application code is in C but bootloader in assembly 8051 | 01/01/70 00:00 | |
| modules | 01/01/70 00:00 | |
Thanks | 01/01/70 00:00 |