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stm32: speed the whole thing up - from 50s to 4s for my current project #8

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stm32: speed the whole thing up - from 50s to 4s for my current project #8

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65802e0
stm32: do not do mass erase on *every* flash operation :)
kfoltman Jun 20, 2015
604440e
stm32: fix bit range order
kfoltman Jun 20, 2015
f73726e
stm32: use block writes to speed up programming
kfoltman Jun 20, 2015
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20 changes: 12 additions & 8 deletions stm32.rb
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Original file line number Diff line number Diff line change
Expand Up @@ -94,7 +94,7 @@ class FlashController
bool :PG, [0x00, 0], :desc => "Programming"
bool :SER, [0x00, 1], :desc => "Sector Erase"
bool :MER, [0x00, 2], :desc => "Mass Erase, bank 1"
unsigned :SNB, [0x00, 3..6], :desc => "Sector Number (within bank)"
unsigned :SNB, [0x00, 6..3], :desc => "Sector Number (within bank)"
unsigned :SNBANK, [0x00, 7], :desc => "Sector Number Bank (F42x/F43x only)"
enum :PSIZE, [0x01, 1..0], {
8 => 0b00, # 1.8-2.1V
Expand Down Expand Up @@ -136,10 +136,6 @@ def lock_flash

def flash_op(&block)
self.unlock_flash
@flash.CR.MER = true
if @bank2
@flash.CR.MER1 = true
end
yield
Log(:stm32, 4){ "waiting for flash transaction to be completed" }
self.wait_for_flash
Expand Down Expand Up @@ -171,6 +167,10 @@ def mass_erase
end
@flash.CR.STRT = true
end
@flash.CR.MER = false
if @bank2
@flash.CR.MER = false
end
end

def sector_erase(sector_no, sector_bank)
Expand All @@ -183,6 +183,7 @@ def sector_erase(sector_no, sector_bank)
end
@flash.CR.STRT = true
end
@flash.CR.SER = false
end

def range_erase(addr, size)
Expand All @@ -209,10 +210,13 @@ def program_section(addr, data)
self.flash_op do
@flash.CR.PG = true
pos = 0
data.each do |w|
@dap.write(addr + pos, w)
pos += 4
maxlen = 64
unit = 4
while pos < data.length
@dap.write(addr + pos * unit, data[pos..pos + maxlen - 1])
pos += maxlen
end
@flash.CR.PG = false
end
end
end
Expand Down