29 lines
737 B
ArmAsm
29 lines
737 B
ArmAsm
/*
|
|
* Useful debugging macro to .include for blinking LEDs on/off from assembler code
|
|
* (aka 1 bit debugging, yay!)
|
|
*
|
|
* To have this work from initial reset, without needing an iomux call
|
|
* first, choose a pin where iomux defaults to GPIO (ie 0,2,4,5)
|
|
*/
|
|
LED_GPIO=2
|
|
GPIO_DIR_SET = 0x6000030c
|
|
GPIO_OUT_SET = 0x60000300
|
|
GPIO_OUT_CLEAR = 0x60000308
|
|
|
|
.macro led_op rega, regb, target
|
|
movi \rega, GPIO_DIR_SET
|
|
movi \regb, (1<<LED_GPIO)
|
|
s32i \regb, \rega, 0
|
|
movi \rega, \target
|
|
s32i \regb, \rega, 0
|
|
.endm
|
|
|
|
// Turn LED on. rega, regb will be clobbered
|
|
.macro led_on rega, regb
|
|
led_op \rega, \regb, GPIO_OUT_SET
|
|
.endm
|
|
|
|
// Turn LED off. rega, regb will be clobbered
|
|
.macro led_off rega, regb
|
|
led_op \rega, \regb, GPIO_OUT_CLEAR
|
|
.endm
|