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-rw-r--r--source/libmaple/api/flash.rst300
1 files changed, 226 insertions, 74 deletions
diff --git a/source/libmaple/api/flash.rst b/source/libmaple/api/flash.rst
index 8a7e79b..8d4fa7d 100644
--- a/source/libmaple/api/flash.rst
+++ b/source/libmaple/api/flash.rst
@@ -1,97 +1,249 @@
.. highlight:: c
.. _libmaple-flash:
-``flash.h``
-===========
+``<libmaple/flash.h>``
+======================
-Flash support.
+Flash memory support.
+
+The built-in Flash on different STM32 MCUs varies in terms of its
+eraseable page/sector size and read/write protections. There isn't
+currently much support for dealing with this. This header is mostly
+useful for its functions that control Flash features which affect
+system performance, like wait states and prefetch buffers.
.. contents:: Contents
:local:
-Types
------
+Devices
+-------
-.. doxygenstruct:: flash_reg_map
+None at this time.
-Functions
----------
+Portable Functions
+------------------
+
+The following functions can be used to portably manipulate Flash memory.
-.. doxygenfunction:: flash_enable_prefetch
.. doxygenfunction:: flash_set_latency
+.. doxygenfunction:: flash_enable_features
+.. doxygenfunction:: flash_enable_prefetch
-Register Map Base Pointers
---------------------------
+Register Maps
+-------------
+
+Register maps vary by target. The base pointer is always ``FLASH_BASE``.
+
+Base Pointer
+~~~~~~~~~~~~
.. doxygendefine:: FLASH_BASE
+STM32F1 targets
+~~~~~~~~~~~~~~~
+
+.. doxygenstruct:: stm32f1::flash_reg_map
+
+STM32F2 targets
+~~~~~~~~~~~~~~~
+
+.. doxygenstruct:: stm32f2::flash_reg_map
+
Register Bit Definitions
------------------------
-Access control register
-~~~~~~~~~~~~~~~~~~~~~~~
-
-.. doxygendefine:: FLASH_ACR_PRFTBS_BIT
-.. doxygendefine:: FLASH_ACR_PRFTBE_BIT
-.. doxygendefine:: FLASH_ACR_HLFCYA_BIT
+Register bit definitions vary by target. They are given as source
+code.
-.. doxygendefine:: FLASH_ACR_PRFTBS
-.. doxygendefine:: FLASH_ACR_PRFTBE
-.. doxygendefine:: FLASH_ACR_HLFCYA
-.. doxygendefine:: FLASH_ACR_LATENCY
+STM32F1 Targets
+~~~~~~~~~~~~~~~
-Status register
+::
+
+ /* Access control register */
+
+ #define FLASH_ACR_PRFTBS_BIT 5
+ #define FLASH_ACR_PRFTBE_BIT 4
+ #define FLASH_ACR_HLFCYA_BIT 3
+
+ #define FLASH_ACR_PRFTBS (1U << FLASH_ACR_PRFTBS_BIT)
+ #define FLASH_ACR_PRFTBE (1U << FLASH_ACR_PRFTBE_BIT)
+ #define FLASH_ACR_HLFCYA (1U << FLASH_ACR_HLFCYA_BIT)
+ #define FLASH_ACR_LATENCY 0x7
+
+ /* Status register */
+
+ #define FLASH_SR_EOP_BIT 5
+ #define FLASH_SR_WRPRTERR_BIT 4
+ #define FLASH_SR_PGERR_BIT 2
+ #define FLASH_SR_BSY_BIT 0
+
+ #define FLASH_SR_EOP (1U << FLASH_SR_EOP_BIT)
+ #define FLASH_SR_WRPRTERR (1U << FLASH_SR_WRPRTERR_BIT)
+ #define FLASH_SR_PGERR (1U << FLASH_SR_PGERR_BIT)
+ #define FLASH_SR_BSY (1U << FLASH_SR_BSY_BIT)
+
+ /* Control register */
+
+ #define FLASH_CR_EOPIE_BIT 12
+ #define FLASH_CR_ERRIE_BIT 10
+ #define FLASH_CR_OPTWRE_BIT 9
+ #define FLASH_CR_LOCK_BIT 7
+ #define FLASH_CR_STRT_BIT 6
+ #define FLASH_CR_OPTER_BIT 5
+ #define FLASH_CR_OPTPG_BIT 4
+ #define FLASH_CR_MER_BIT 2
+ #define FLASH_CR_PER_BIT 1
+ #define FLASH_CR_PG_BIT 0
+
+ #define FLASH_CR_EOPIE (1U << FLASH_CR_EOPIE_BIT)
+ #define FLASH_CR_ERRIE (1U << FLASH_CR_ERRIE_BIT)
+ #define FLASH_CR_OPTWRE (1U << FLASH_CR_OPTWRE_BIT)
+ #define FLASH_CR_LOCK (1U << FLASH_CR_LOCK_BIT)
+ #define FLASH_CR_STRT (1U << FLASH_CR_STRT_BIT)
+ #define FLASH_CR_OPTER (1U << FLASH_CR_OPTER_BIT)
+ #define FLASH_CR_OPTPG (1U << FLASH_CR_OPTPG_BIT)
+ #define FLASH_CR_MER (1U << FLASH_CR_MER_BIT)
+ #define FLASH_CR_PER (1U << FLASH_CR_PER_BIT)
+ #define FLASH_CR_PG (1U << FLASH_CR_PG_BIT)
+
+ /* Option byte register */
+
+ #define FLASH_OBR_nRST_STDBY_BIT 4
+ #define FLASH_OBR_nRST_STOP_BIT 3
+ #define FLASH_OBR_WDG_SW_BIT 2
+ #define FLASH_OBR_RDPRT_BIT 1
+ #define FLASH_OBR_OPTERR_BIT 0
+
+ #define FLASH_OBR_DATA1 (0xFF << 18)
+ #define FLASH_OBR_DATA0 (0xFF << 10)
+ #define FLASH_OBR_USER 0x3FF
+ #define FLASH_OBR_nRST_STDBY (1U << FLASH_OBR_nRST_STDBY_BIT)
+ #define FLASH_OBR_nRST_STOP (1U << FLASH_OBR_nRST_STOP_BIT)
+ #define FLASH_OBR_WDG_SW (1U << FLASH_OBR_WDG_SW_BIT)
+ #define FLASH_OBR_RDPRT (1U << FLASH_OBR_RDPRT_BIT)
+ #define FLASH_OBR_OPTERR (1U << FLASH_OBR_OPTERR_BIT)
+
+STM32F2 Targets
~~~~~~~~~~~~~~~
-.. doxygendefine:: FLASH_SR_EOP_BIT
-.. doxygendefine:: FLASH_SR_WRPRTERR_BIT
-.. doxygendefine:: FLASH_SR_PGERR_BIT
-.. doxygendefine:: FLASH_SR_BSY_BIT
-
-.. doxygendefine:: FLASH_SR_EOP
-.. doxygendefine:: FLASH_SR_WRPRTERR
-.. doxygendefine:: FLASH_SR_PGERR
-.. doxygendefine:: FLASH_SR_BSY
-
-Control register
-~~~~~~~~~~~~~~~~
-
-.. doxygendefine:: FLASH_CR_EOPIE_BIT
-.. doxygendefine:: FLASH_CR_ERRIE_BIT
-.. doxygendefine:: FLASH_CR_OPTWRE_BIT
-.. doxygendefine:: FLASH_CR_LOCK_BIT
-.. doxygendefine:: FLASH_CR_STRT_BIT
-.. doxygendefine:: FLASH_CR_OPTER_BIT
-.. doxygendefine:: FLASH_CR_OPTPG_BIT
-.. doxygendefine:: FLASH_CR_MER_BIT
-.. doxygendefine:: FLASH_CR_PER_BIT
-.. doxygendefine:: FLASH_CR_PG_BIT
-
-.. doxygendefine:: FLASH_CR_EOPIE
-.. doxygendefine:: FLASH_CR_ERRIE
-.. doxygendefine:: FLASH_CR_OPTWRE
-.. doxygendefine:: FLASH_CR_LOCK
-.. doxygendefine:: FLASH_CR_STRT
-.. doxygendefine:: FLASH_CR_OPTER
-.. doxygendefine:: FLASH_CR_OPTPG
-.. doxygendefine:: FLASH_CR_MER
-.. doxygendefine:: FLASH_CR_PER
-.. doxygendefine:: FLASH_CR_PG
-
-Option byte register
-~~~~~~~~~~~~~~~~~~~~
-
-.. doxygendefine:: FLASH_OBR_nRST_STDBY_BIT
-.. doxygendefine:: FLASH_OBR_nRST_STOP_BIT
-.. doxygendefine:: FLASH_OBR_WDG_SW_BIT
-.. doxygendefine:: FLASH_OBR_RDPRT_BIT
-.. doxygendefine:: FLASH_OBR_OPTERR_BIT
-
-.. doxygendefine:: FLASH_OBR_DATA1
-.. doxygendefine:: FLASH_OBR_DATA0
-.. doxygendefine:: FLASH_OBR_USER
-.. doxygendefine:: FLASH_OBR_nRST_STDBY
-.. doxygendefine:: FLASH_OBR_nRST_STOP
-.. doxygendefine:: FLASH_OBR_WDG_SW
-.. doxygendefine:: FLASH_OBR_RDPRT
-.. doxygendefine:: FLASH_OBR_OPTERR
+::
+
+ /* Access control register */
+
+ #define FLASH_ACR_DCRST_BIT 12
+ #define FLASH_ACR_ICRST_BIT 11
+ #define FLASH_ACR_DCEN_BIT 10
+ #define FLASH_ACR_ICEN_BIT 9
+ #define FLASH_ACR_PRFTEN_BIT 8
+
+ #define FLASH_ACR_DCRST (1U << FLASH_ACR_DCRST_BIT)
+ #define FLASH_ACR_ICRST (1U << FLASH_ACR_ICRST_BIT)
+ #define FLASH_ACR_DCEN (1U << FLASH_ACR_DCEN_BIT)
+ #define FLASH_ACR_ICEN (1U << FLASH_ACR_ICEN_BIT)
+ #define FLASH_ACR_PRFTEN (1U << FLASH_ACR_PRFTEN_BIT)
+ #define FLASH_ACR_LATENCY 0x7
+ #define FLASH_ACR_LATENCY_0WS 0x0
+ #define FLASH_ACR_LATENCY_1WS 0x1
+ #define FLASH_ACR_LATENCY_2WS 0x2
+ #define FLASH_ACR_LATENCY_3WS 0x3
+ #define FLASH_ACR_LATENCY_4WS 0x4
+ #define FLASH_ACR_LATENCY_5WS 0x5
+ #define FLASH_ACR_LATENCY_6WS 0x6
+ #define FLASH_ACR_LATENCY_7WS 0x7
+
+ /* Key register */
+
+ #define FLASH_KEYR_KEY1 0x45670123
+ #define FLASH_KEYR_KEY2 0xCDEF89AB
+
+ /* Option key register */
+
+ #define FLASH_OPTKEYR_OPTKEY1 0x08192A3B
+ #define FLASH_OPTKEYR_OPTKEY2 0x4C5D6E7F
+
+ /* Status register */
+
+ #define FLASH_SR_BSY_BIT 16
+ #define FLASH_SR_PGSERR_BIT 7
+ #define FLASH_SR_PGPERR_BIT 6
+ #define FLASH_SR_PGAERR_BIT 5
+ #define FLASH_SR_WRPERR_BIT 4
+ #define FLASH_SR_OPERR_BIT 1
+ #define FLASH_SR_EOP_BIT 0
+
+ #define FLASH_SR_BSY (1U << FLASH_SR_BSY_BIT)
+ #define FLASH_SR_PGSERR (1U << FLASH_SR_PGSERR_BIT)
+ #define FLASH_SR_PGPERR (1U << FLASH_SR_PGPERR_BIT)
+ #define FLASH_SR_PGAERR (1U << FLASH_SR_PGAERR_BIT)
+ #define FLASH_SR_WRPERR (1U << FLASH_SR_WRPERR_BIT)
+ #define FLASH_SR_OPERR (1U << FLASH_SR_OPERR_BIT)
+ #define FLASH_SR_EOP (1U << FLASH_SR_EOP_BIT)
+
+ /* Control register */
+
+ #define FLASH_CR_LOCK_BIT 31
+ #define FLASH_CR_ERRIE_BIT 25
+ #define FLASH_CR_EOPIE_BIT 24
+ #define FLASH_CR_STRT_BIT 16
+ #define FLASH_CR_MER_BIT 2
+ #define FLASH_CR_SER_BIT 1
+ #define FLASH_CR_PG_BIT 0
+
+ #define FLASH_CR_LOCK (1U << FLASH_CR_LOCK_BIT)
+ #define FLASH_CR_ERRIE (1U << FLASH_CR_ERRIE_BIT)
+ #define FLASH_CR_EOPIE (1U << FLASH_CR_EOPIE_BIT)
+ #define FLASH_CR_STRT (1U << FLASH_CR_STRT_BIT)
+
+ #define FLASH_CR_PSIZE (0x3 << 8)
+ #define FLASH_CR_PSIZE_MUL8 (0x0 << 8)
+ #define FLASH_CR_PSIZE_MUL16 (0x1 << 8)
+ #define FLASH_CR_PSIZE_MUL32 (0x2 << 8)
+ #define FLASH_CR_PSIZE_MUL64 (0x3 << 8)
+
+ #define FLASH_CR_SNB (0xF << 3)
+ #define FLASH_CR_SNB_0 (0x0 << 3)
+ #define FLASH_CR_SNB_1 (0x1 << 3)
+ #define FLASH_CR_SNB_2 (0x2 << 3)
+ #define FLASH_CR_SNB_3 (0x3 << 3)
+ #define FLASH_CR_SNB_4 (0x4 << 3)
+ #define FLASH_CR_SNB_5 (0x5 << 3)
+ #define FLASH_CR_SNB_6 (0x6 << 3)
+ #define FLASH_CR_SNB_7 (0x7 << 3)
+ #define FLASH_CR_SNB_8 (0x8 << 3)
+ #define FLASH_CR_SNB_9 (0x9 << 3)
+ #define FLASH_CR_SNB_10 (0xA << 3)
+ #define FLASH_CR_SNB_11 (0xB << 3)
+
+ #define FLASH_CR_MER (1U << FLASH_CR_MER_BIT)
+ #define FLASH_CR_SER (1U << FLASH_CR_SER_BIT)
+ #define FLASH_CR_PG (1U << FLASH_CR_PG_BIT)
+
+ /* Option control register */
+
+ #define FLASH_OPTCR_NRST_STDBY_BIT 7
+ #define FLASH_OPTCR_NRST_STOP_BIT 6
+ #define FLASH_OPTCR_WDG_SW_BIT 5
+ #define FLASH_OPTCR_OPTSTRT_BIT 1
+ #define FLASH_OPTCR_OPTLOCK_BIT 0
+
+ #define FLASH_OPTCR_NWRP (0x3FF << 16)
+
+ /* Excluded: The many level 1 values */
+ #define FLASH_OPTCR_RDP (0xFF << 8)
+ #define FLASH_OPTCR_RDP_LEVEL0 (0xAA << 8)
+ #define FLASH_OPTCR_RDP_LEVEL2 (0xCC << 8)
+
+ #define FLASH_OPTCR_USER (0x7 << 5)
+ #define FLASH_OPTCR_nRST_STDBY (1U << FLASH_OPTCR_nRST_STDBY_BIT)
+ #define FLASH_OPTCR_nRST_STOP (1U << FLASH_OPTCR_nRST_STOP_BIT)
+ #define FLASH_OPTCR_WDG_SW (1U << FLASH_OPTCR_WDG_SW_BIT)
+
+ #define FLASH_OPTCR_BOR_LEV (0x3 << 2)
+ #define FLASH_OPTCR_BOR_LEVEL3 (0x0 << 2)
+ #define FLASH_OPTCR_BOR_LEVEL2 (0x1 << 2)
+ #define FLASH_OPTCR_BOR_LEVEL1 (0x2 << 2)
+ #define FLASH_OPTCR_BOR_OFF (0x3 << 2)
+
+ #define FLASH_OPTCR_OPTSTRT (1U << FLASH_OPTCR_OPTSTRT_BIT)
+ #define FLASH_OPTCR_OPTLOCK (1U << FLASH_OPTCR_OPTLOCK_BIT)