From 261c210c9c4c1e55103a7af31dfcc539c0e0e5cc Mon Sep 17 00:00:00 2001 From: Jacques Comeaux Date: Fri, 19 Jan 2024 16:41:29 -0600 Subject: Add subroutine for printing hexadecimal word --- xosc.s | 23 ----------------------- 1 file changed, 23 deletions(-) delete mode 100644 xosc.s (limited to 'xosc.s') diff --git a/xosc.s b/xosc.s deleted file mode 100644 index 883200f..0000000 --- a/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 = 47 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 -- cgit v1.2.3