diff options
Diffstat (limited to 'src/drivers')
| -rw-r--r-- | src/drivers/uart.S | 20 |
1 files changed, 10 insertions, 10 deletions
diff --git a/src/drivers/uart.S b/src/drivers/uart.S index 731e160..38957c2 100644 --- a/src/drivers/uart.S +++ b/src/drivers/uart.S @@ -4,10 +4,10 @@ uart_char: mov r2, #0x1000 movt r2, #0x3f20 -uart_char.loop: +1: ldr r3, [r2, #24] tst r3, #0b100000 - bne uart_char.loop + bne 1b str r0, [r2] bx lr @@ -18,11 +18,11 @@ uart_string: ldrb r0, [r0] cmp r0, #0 popeq {r4, pc} -uart_string.loop: +1: bl uart_char ldrb r0, [r4, #1]! cmp r0, #0 - bne uart_string.loop + bne 1b pop {r4, pc} .globl uart_hex @@ -30,12 +30,12 @@ uart_hex: push {r4, lr} mov r2, #0x1000 movt r2, #0x3f20 -uart_hex.loop: +1: ldr r3, [r2, #24] tst r3, #0b100000 - bne uart_hex.loop + bne 1b mov r3, #7 -uart_hex.hloop: +2: mov r1, r0 asr r1, r3 asr r1, r3 @@ -44,10 +44,10 @@ uart_hex.hloop: and r1, #0xf add r1, #0x30 cmp r1, #0x3A - blt uart_hex.print + blt 3f add r1, #7 -uart_hex.print: +3: str r1, [r2] subs r3, #1 - bge uart_hex.hloop // Jump back to wait for availablilty + bge 2b // Jump back to wait for availablilty pop {r4, pc} |