From 34d0f64529a77c0375af8c9429b5571e7cedcb0b Mon Sep 17 00:00:00 2001 From: Mike Date: Fri, 25 Apr 2014 22:34:58 +0100 Subject: Nordic nRF51 series support --- flashstub/nrf51.s | 40 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) create mode 100644 flashstub/nrf51.s (limited to 'flashstub/nrf51.s') diff --git a/flashstub/nrf51.s b/flashstub/nrf51.s new file mode 100644 index 0000000..e23b613 --- /dev/null +++ b/flashstub/nrf51.s @@ -0,0 +1,40 @@ +.global _start + +_start: + ldr r0, _ready + ldr r1, _addr + mov r2, pc + add r2, #(_data - . - 2) + ldr r3, _size +_next: + cmp r3, #0 + beq _done + @ Write data to flash + ldr r4, [r2] + str r4, [r1] + +_wait: @ Wait for READY bit + ldr r4, [r0] + mov r6, #1 + tst r4, r6 + beq _wait + + sub r3, #4 + add r1, #4 + add r2, #4 + b _next +_done: + bkpt + +@.align 4 +.org 0x24 +_ready: + .word 0x4001E400 +_addr: + .word 0 +_size: + .word 12 +_data: + .word 0xAAAAAAAA + .word 0xBBBBBBBB + .word 0xCCCCCCCC -- cgit v1.2.3