Make startup file unix like and add a hardcoded enable for the FPU

2020-06-04 21:20:17 +02:00 · 2020-06-04 21:20:17 +02:00 · 6b4029f8c2
parent 76f5a4e9be
commit 6b4029f8c2
1 changed files with 519 additions and 513 deletions
--- a/stm-firmware/boot/startup_stm32f4xx.S
+++ b/stm-firmware/boot/startup_stm32f4xx.S
@ -99,6 +99,12 @@ LoopFillZerobss:
  //bl __libc_init_array
 /* Call the application's entry point.*/

+  /* Enable FPU hard */
+  LDR.W   R0, =0xE000ED88
+  LDR     R1, [R0]
+  ORR     R1, R1, #(0xF << 20)
+  STR     R1, [R0]
+
  bl  main
  bx  lr    
 .size  Reset_Handler, .-Reset_Handler