diff options
Diffstat (limited to 'hexedit/xosc.s')
-rw-r--r-- | hexedit/xosc.s | 23 |
1 files changed, 0 insertions, 23 deletions
diff --git a/hexedit/xosc.s b/hexedit/xosc.s deleted file mode 100644 index 63760da..0000000 --- a/hexedit/xosc.s +++ /dev/null @@ -1,23 +0,0 @@ -.syntax unified -.cpu cortex-m0plus -.thumb - -.equ XOSC_BASE, 0x40024000 -.equ CTRL_OFST, 0x0 -.equ STATUS_OFST, 0x4 -.equ STARTUP_OFST, 0xc - -.type start_xosc, %function -.global start_xosc - -start_xosc: - ldr r1, =XOSC_BASE - movs r0, 47 // startup delay for 12Mhz crystal - str r0, [r1, STARTUP_OFST] - ldr r0, =0x00fabaa0 // enable - str r0, [r1, CTRL_OFST] -1: - ldr r0, [r1, STATUS_OFST] - lsrs r0, 31 // stable bit - beq 1b - bx lr |