From 72666a5b936368275423f0735af7939473616d68 Mon Sep 17 00:00:00 2001 From: Karl Palsson Date: Fri, 9 Nov 2012 21:38:06 +0000 Subject: [PATCH] [l1] Add Flash Memory Controller Register defns for L1. Also, some of the most basic essential helper functions. --- include/libopencm3/stm32/l1/flash.h | 125 ++++++++++++++++++++++++++++ lib/stm32/l1/Makefile | 2 +- lib/stm32/l1/flash.c | 52 ++++++++++++ 3 files changed, 178 insertions(+), 1 deletion(-) create mode 100644 include/libopencm3/stm32/l1/flash.h create mode 100644 lib/stm32/l1/flash.c diff --git a/include/libopencm3/stm32/l1/flash.h b/include/libopencm3/stm32/l1/flash.h new file mode 100644 index 00000000..ed0a6969 --- /dev/null +++ b/include/libopencm3/stm32/l1/flash.h @@ -0,0 +1,125 @@ +/* + * This file is part of the libopencm3 project. + * + * Copyright (C) 2010 Thomas Otto + * Copyright (C) 2010 Mark Butler + * Copyright (C) 2012 Karl Palsson + * + * This library is free software: you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public License + * along with this library. If not, see . + */ + +/* + * All extracted from PM0062 rev2, L15xx and L16xx Flash/EEPROM programming manual + */ + +#ifndef LIBOPENCM3_FLASH_H +#define LIBOPENCM3_FLASH_H + +#include +#include + +/* --- FLASH registers ----------------------------------------------------- */ + +#define FLASH_ACR MMIO32(FLASH_MEM_INTERFACE_BASE + 0x00) +#define FLASH_PECR MMIO32(FLASH_MEM_INTERFACE_BASE + 0x04) +#define FLASH_PDKEYR MMIO32(FLASH_MEM_INTERFACE_BASE + 0x08) +#define FLASH_PEKEYR MMIO32(FLASH_MEM_INTERFACE_BASE + 0x0C) +#define FLASH_PRGKEYR MMIO32(FLASH_MEM_INTERFACE_BASE + 0x10) +#define FLASH_OPTKEYR MMIO32(FLASH_MEM_INTERFACE_BASE + 0x14) +#define FLASH_SR MMIO32(FLASH_MEM_INTERFACE_BASE + 0x18) +#define FLASH_OBR MMIO32(FLASH_MEM_INTERFACE_BASE + 0x1c) +#define FLASH_WRPR1 MMIO32(FLASH_MEM_INTERFACE_BASE + 0x20) +#define FLASH_WRPR2 MMIO32(FLASH_MEM_INTERFACE_BASE + 0x80) +#define FLASH_WRPR3 MMIO32(FLASH_MEM_INTERFACE_BASE + 0x84) + +/* --- FLASH_ACR values ---------------------------------------------------- */ + +#define FLASH_RUNPD (1 << 4) +#define FLASH_SLEEPPD (1 << 3) +#define FLASH_ACC64 (1 << 2) +#define FLASH_PRFTEN (1 << 1) +#define FLASH_LATENCY_0WS 0x00 +#define FLASH_LATENCY_1WS 0x01 + +/* --- FLASH_PECR values. Program/erase control register */ +#define FLASH_OBL_LAUNCH (1 << 18) +#define FLASH_ERRIE (1 << 17) +#define FLASH_EOPIE (1 << 16) +#define FLASH_PARALLBANK (1 << 15) +#define FLASH_FPRG (1 << 10) +#define FLASH_ERASE (1 << 9) +#define FLASH_FTDW (1 << 8) +#define FLASH_FTDW (1 << 8) +#define FLASH_DATA (1 << 4) +#define FLASH_PROG (1 << 3) +#define FLASH_OPTLOCK (1 << 2) +#define FLASH_PRGLOCK (1 << 1) +#define FLASH_PELOCK (1 << 0) + +/* Power down key register (FLASH_PDKEYR) */ +#define FLASH_PDKEY1 ((u32)0x04152637) +#define FLASH_PDKEY2 ((u32)0xFAFBFCFD) + +/* Program/erase key register (FLASH_PEKEYR) */ +#define FLASH_PEKEY1 ((u32)0x89ABCDEF) +#define FLASH_PEKEY2 ((u32)0x02030405) + +/* Program memory key register (FLASH_PRGKEYR) */ +#define FLASH_PRGKEY1 ((u32)0x8C9DAEBF) +#define FLASH_PRGKEY2 ((u32)0x13141516) + +/* Option byte key register (FLASH_OPTKEYR) */ +#define FLASH_OPTKEY1 ((u32)0xFBEAD9C8) +#define FLASH_OPTKEY2 ((u32)0x24252627) + + +/* --- FLASH_SR values ----------------------------------------------------- */ +#define FLASH_OPTVERRUSR (1 << 12) +#define FLASH_OPTVERR (1 << 11) +#define FLASH_SIZEERR (1 << 10) +#define FLASH_PGAERR (1 << 9) +#define FLASH_WRPERR (1 << 8) +#define FLASH_READY (1 << 3) +#define FLASH_ENDHV (1 << 2) +#define FLASH_EOP (1 << 1) +#define FLASH_BSY (1 << 0) + +/* --- FLASH_OBR values ----------------------------------------------------- */ +#define FLASH_BFB2 (1 << 23) +#define FLASH_NRST_STDBY (1 << 22) +#define FLASH_NRST_STOP (1 << 21) +#define FLASH_IWDG_SW (1 << 20) +#define FLASH_BOR_OFF (0x0 << 16) +#define FLASH_BOR_LEVEL_1 (0x8 << 16) +#define FLASH_BOR_LEVEL_2 (0x9 << 16) +#define FLASH_BOR_LEVEL_3 (0xa << 16) +#define FLASH_BOR_LEVEL_4 (0xb << 16) +#define FLASH_BOR_LEVEL_5 (0xc << 16) +#define FLASH_RDPRT_LEVEL_0 (0xaa) +#define FLASH_RDPRT_LEVEL_1 (0x00) +#define FLASH_RDPRT_LEVEL_2 (0xcc) + +/* --- Function prototypes ------------------------------------------------- */ + +BEGIN_DECLS + +void flash_64bit_enable(void); +void flash_64bit_disable(void); +void flash_prefetch_enable(void); +void flash_prefetch_disable(void); +void flash_set_ws(u32 ws); + +END_DECLS + +#endif diff --git a/lib/stm32/l1/Makefile b/lib/stm32/l1/Makefile index 7f3e1576..dc587c2b 100644 --- a/lib/stm32/l1/Makefile +++ b/lib/stm32/l1/Makefile @@ -29,7 +29,7 @@ CFLAGS = -Os -g -Wall -Wextra -I../../../include -fno-common \ # ARFLAGS = rcsv ARFLAGS = rcs OBJS = rcc.o gpio.o desig.o crc.o usart.o exti2.o \ - gpio_common_all.o gpio_common_f24.o + flash.o gpio_common_all.o gpio_common_f24.o VPATH += ../../usb:../:../../cm3:../common diff --git a/lib/stm32/l1/flash.c b/lib/stm32/l1/flash.c new file mode 100644 index 00000000..06e8a597 --- /dev/null +++ b/lib/stm32/l1/flash.c @@ -0,0 +1,52 @@ +/* + * This file is part of the libopencm3 project. + * + * Copyright (C) 2010 Thomas Otto + * Copyright (C) 2010 Mark Butler + * Copyright (C) 2012 Karl Palsson + * + * This library is free software: you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public License + * along with this library. If not, see . + */ + +#include + +void flash_64bit_enable(void) +{ + FLASH_ACR |= FLASH_ACC64; +} + +void flash_64bit_disable(void) +{ + FLASH_ACR &= ~FLASH_ACC64; +} + +void flash_prefetch_enable(void) +{ + FLASH_ACR |= FLASH_PRFTEN; +} + +void flash_prefetch_disable(void) +{ + FLASH_ACR &= ~FLASH_PRFTEN; +} + +void flash_set_ws(u32 ws) +{ + u32 reg32; + + reg32 = FLASH_ACR; + reg32 &= ~(1 << 0); + reg32 |= ws; + FLASH_ACR = reg32; +} \ No newline at end of file