using weak links for individual isrs

include/isr.h

@@ -10,13 +10,9 @@
 #define INTENNUM INTBASE + INTENNUM_OFF
 #define INTSRC   INTBASE + INTSRC_OFF 
 
-
-#define no_isrs() no_tmr_isr();
-
 #define enable_tmr_irq() *(volatile uint32_t *)(INTENNUM) = 5;
-#define no_tmr_isr() void tmr_isr(void) { return; }
 
-extern void tmr_isr(void);
+extern void tmr_isr(void) __attribute__((weak));
 
 #endif
 

src/isr.c

@@ -10,7 +10,9 @@ void irq(void)
 {
 //	ISR_ENTRY();
 	/* check for TMR0 interrupt */
-	tmr_isr(); // led turns off if I have this, indicating that the isr does jump to tmr_isr
+	if(tmr_isr != NULL) {
+		tmr_isr(); // led turns off if I have this, indicating that the isr does jump to tmr_isr
+	}
 //	if(reg32(INTSRC) & (1<<5)) { tmr_isr(); }
 //	asm("SUBS PC,R14_IRQ,#4")
 //	enableIRQ(); // I think this is necessary, but the LED never turns off when I have this

tests/blink-blue.c

@@ -7,8 +7,6 @@
 #include "embedded_types.h"
 #include "isr.h"
 
-no_isrs();
-
 __attribute__ ((section ("startup")))
 void main(void) {
 	

tests/blink-green.c

@@ -7,8 +7,6 @@
 #include "embedded_types.h"
 #include "isr.h"
 
-no_isrs();
-
 __attribute__ ((section ("startup")))
 void main(void) {
 	

tests/blink-red.c

@@ -7,8 +7,6 @@
 #include "embedded_types.h"
 #include "isr.h"
 
-no_isrs();
-
 __attribute__ ((section ("startup"))) void main(void) {
 	*(volatile uint32_t *)GPIO_PAD_DIR0 = 0x00000100;
 

tests/blink-white.c

@@ -7,8 +7,6 @@
 #include "embedded_types.h"
 #include "isr.h"
 
-no_isrs();
-
 __attribute__ ((section ("startup")))
 void main(void) {
 	

tests/nvm-read.c

@@ -31,8 +31,6 @@ const uint8_t hex[16]={'0','1','2','3','4','5','6','7',
 
 #include "isr.h"
 
-no_isrs();
-
 #define NBYTES 1024
 __attribute__ ((section ("startup")))
 void main(void) {

tests/rftest-rx.c

@@ -14,6 +14,7 @@
 
 #include "maca.h"
 #include "embedded_types.h"
+#include "isr.h"
 
 #define reg(x) (*(volatile uint32_t *)(x))
 
@@ -77,9 +78,6 @@ void toggle_led(void) {
 	}
 }
 
-#include "isr.h"
-no_isrs();
-
 __attribute__ ((section ("startup")))
 void main(void) {
 	uint8_t c;

tests/rftest-tx.c

@@ -14,6 +14,7 @@
 
 #include "maca.h"
 #include "embedded_types.h"
+#include "isr.h"
 
 #define reg(x) (*(volatile uint32_t *)(x))
 
@@ -112,9 +113,6 @@ void fill_data(void) {
 	}		
 }
 
-#include "isr.h"
-no_isrs();
-
 __attribute__ ((section ("startup")))
 void main(void) {
 	uint8_t c;

tests/romimg.c

@@ -29,7 +29,6 @@ const uint8_t hex[16]={'0','1','2','3','4','5','6','7',
 //#define DUMP_LEN  16
 
 #include "isr.h"
-no_isrs();
 
 __attribute__ ((section ("startup")))
 void main(void) {

tests/tmr.c

@@ -47,9 +47,7 @@
 #define reg16(x) (*(volatile uint16_t *)(x))
 
 #include "embedded_types.h"
-
 #include "isr.h"
-no_isrs();
 
 __attribute__ ((section ("startup")))
 void main(void) {

tests/uart1-loopback.c

@@ -10,9 +10,7 @@
 #define UART1_BR        0x80005018
 
 #include "embedded_types.h"
-
 #include "isr.h"
-no_isrs();
 
 __attribute__ ((section ("startup")))
 void main(void) {