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cpu/stm32f4: add riotboot requirements #11682

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Merged
aabadie merged 3 commits into from
Aug 8, 2019
Merged

cpu/stm32f4: add riotboot requirements #11682

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c67dfd9
stm32f4/Makefile.include: add riotboot requirements
fjmolinas Jun 8, 2019
9418eef
boards/stm32f429i-disc1: add riotboot
fjmolinas Jun 8, 2019
bfcb963
boards/nucleo-f446re: add riotboot
fjmolinas Jun 11, 2019
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1 change: 1 addition & 0 deletions boards/nucleo-f446re/Makefile.features
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Expand Up @@ -10,6 +10,7 @@ FEATURES_PROVIDED += periph_qdec

# Various other features (if any)
FEATURES_PROVIDED += motor_driver
FEATURES_PROVIDED += riotboot

# load the common Makefile.features for Nucleo boards
include $(RIOTBOARD)/common/nucleo64/Makefile.features
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3 changes: 3 additions & 0 deletions boards/stm32f429i-disc1/Makefile.features
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Expand Up @@ -4,4 +4,7 @@ FEATURES_PROVIDED += periph_spi
FEATURES_PROVIDED += periph_timer
FEATURES_PROVIDED += periph_uart

# Put other features for this board (in alphabetical order)
FEATURES_PROVIDED += riotboot

include $(RIOTCPU)/stm32f4/Makefile.features
17 changes: 17 additions & 0 deletions cpu/stm32f4/Makefile.include
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@@ -1,5 +1,22 @@
export CPU_ARCH = cortex-m4f
export CPU_FAM = stm32f4

# STM32F4 uses sectors instead of pages, where the minimum sector length is 16KB
# (the first sector), therefore RIOTBOOT_LEN must be 16KB to cover a whole sector.
RIOTBOOT_LEN ?= 0x4000

# CPU_IRQ_NUMOF for STM32F4 boards is < 102+16 so (118*4 bytes = 472 bytes ~= 0x200)
# RIOTBOOT_HDR_LEN can be set to 0x200.
# Details on alignment requirements for M4 in `cpu/cortexm_common/Makefile.include`.
RIOTBOOT_HDR_LEN ?= 0x200

# Sectors don't have the same length. Per bank there can be up to 12 sectors. The
# first 4 sectors are 16kB long, the 5th is 64kB and the remaining 7 are 128kB.
# Since flash can only be erased by sector, slots can't overlap over sectors.
# RIOTBOOT_LEN is removed twice, once at the start of the flash for the bootloader,
# and a second time at the end of the flash, to get evenly sized and distributed slots.
SLOT0_LEN ?= $(shell printf "0x%x" $$((($(ROM_LEN:%K=%*1024)-2*$(RIOTBOOT_LEN)) / $(NUM_SLOTS))))
SLOT1_LEN ?= $(SLOT0_LEN)

include $(RIOTCPU)/stm32_common/Makefile.include
include $(RIOTMAKE)/arch/cortexm.inc.mk