The attached patch adds a watchdog reset vector and FT930 support
to the base interrupt code.
[libgcc]
2017-09-28 James Bowman <james.bow...@ftdichip.com>
* config/ft32/crti-hw.S: Add watchdog vector, FT930
IRQ support.
Index: libgcc/config/ft32/crti-hw.S
===================================================================
--- libgcc/config/ft32/crti-hw.S (revision 253084)
+++ libgcc/config/ft32/crti-hw.S (working copy)
@@ -1,8 +1,8 @@
.global _start
_start:
# START Interrupt Vector Table [[
- jmp __PMSIZE-4
- jmp watchdog_init
+ jmp __PMSIZE-4 # RESET Vector
+ jmp interrupt_33 # Watchdog reset vector
jmp interrupt_0
jmp interrupt_1
jmp interrupt_2
@@ -35,24 +35,29 @@
jmp interrupt_29
jmp interrupt_30
jmp interrupt_31
- jmp __PMSIZE-8
+ jmp __PMSIZE-8 # Interrupt vector 32 (NMI)
# ]] END Interrupt Vector Table
codestart:
jmp init
-
+
.global _exithook
_exithook: # Debugger uses '_exithook' at 0x90 to catch program
exit
return
-
-watchdog_init:
- ldk $r0,1
+
init:
ldk $sp,__RAMSIZE
# Disable all interrupts
- ldk $r4,0x80
- sta.b 0x100e3,$r4
-
+ lda $r1,0x10000
+ lshr $r1,$r1,20
+ cmp $r1,0x90
+ ldk $r1,0x100e3 # FT900 IRQ Control Register
+ jmpc z,1f
+ ldk $r1,0x10123 # FT930 IRQ Control Register
+1:
+ ldk $r4,0x80
+ sti.b $r1,0,$r4
+
# Initialize DATA by copying from program memory
ldk.l $r4,__data_load_start
ldk.l $r1,__data_load_end
@@ -139,6 +144,7 @@
inth 30
inth 31
inth 32
+ inth 33
# On entry: r0, already saved, holds the handler function
interrupt_common:
@@ -182,7 +188,7 @@
.section .data
.global vector_table
vector_table:
- .rept 33
+ .rept 34
.long nullvector
.endr
