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AP_HAL_ChibiOS: retain memory of past conflicts in dma_resolver

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bugobliterator 2021-01-17 21:40:59 +05:30 committed by Peter Barker
parent d9de0ef649
commit 41693403e2
1 changed files with 24 additions and 5 deletions
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29
libraries/AP_HAL_ChibiOS/hwdef/scripts/dma_resolver.py
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@ -11,11 +11,15 @@ dma_map = None
debug = False
def check_possibility(periph, dma_stream, curr_dict, dma_map, check_list, recurse=False):
def check_possibility(periph, dma_stream, curr_dict, dma_map, check_list, cannot_use_stream):
global ignore_list
if debug:
print('............ Checking ', periph, dma_stream, 'without', cannot_use_stream)
for other_periph in curr_dict:
if other_periph != periph:
if curr_dict[other_periph] == dma_stream:
if debug:
print('.................... Collision', other_periph, dma_stream)
ignore_list.append(periph)
check_str = "%s(%d,%d) %s(%d,%d)" % (
other_periph, curr_dict[other_periph][0],
@ -30,11 +34,19 @@ def check_possibility(periph, dma_stream, curr_dict, dma_map, check_list, recurs
#check if we can resolve by swapping with other periphs
for streamchan in dma_map[other_periph]:
stream = (streamchan[0], streamchan[1])
if stream != curr_dict[other_periph] and check_possibility(other_periph, stream, curr_dict, dma_map, check_list, False):
if not recurse:
curr_dict[other_periph] = stream
if stream != curr_dict[other_periph] and \
stream not in cannot_use_stream and \
check_possibility(other_periph, stream, curr_dict, dma_map, check_list, cannot_use_stream+[(dma_stream)]):
curr_dict[other_periph] = stream
if debug:
print ('....................... Resolving', other_periph, stream)
return True
if debug:
print ('....................... UnSolved !!!!!!!!', periph, dma_stream)
return False
if debug:
print ('....................... Solved ..........', periph, dma_stream)
return True
def can_share(periph, noshare_list):
@ -270,11 +282,18 @@ def write_dma_header(f, peripheral_list, mcu_type, dma_exclude=[],
print("Unknown peripheral function %s in DMA map for %s" %
(periph, mcu_type))
sys.exit(1)
if debug:
print('\n\n.....Starting lookup for', periph)
for streamchan in dma_map[periph]:
if debug:
print('........Possibility for', periph, streamchan)
stream = (streamchan[0], streamchan[1])
if check_possibility(periph, stream, curr_dict, dma_map,
check_list):
check_list, []):
curr_dict[periph] = stream
if debug:
print ('....................... Setting', periph, stream)
assigned = True
break
if assigned == False: