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author | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2012-09-29 20:34:25 +0000 |
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committer | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2012-09-29 20:34:25 +0000 |
commit | 948e492aab34e89e3e372066be17eb6a0fbd7ea2 (patch) | |
tree | 30c5dcd88c8d3a48442681bf495501d0b092d264 /nuttx/arch/arm/src/stm32/chip | |
parent | 57265abd72741dcd33de4f9adae3d42d75f036c4 (diff) | |
download | px4-nuttx-948e492aab34e89e3e372066be17eb6a0fbd7ea2.tar.gz px4-nuttx-948e492aab34e89e3e372066be17eb6a0fbd7ea2.tar.bz2 px4-nuttx-948e492aab34e89e3e372066be17eb6a0fbd7ea2.zip |
Implementation of /dev/random using the STM32 Random Number Generator (RNG)
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5207 42af7a65-404d-4744-a932-0658087f49c3
Diffstat (limited to 'nuttx/arch/arm/src/stm32/chip')
-rw-r--r-- | nuttx/arch/arm/src/stm32/chip/stm32_rng.h | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/nuttx/arch/arm/src/stm32/chip/stm32_rng.h b/nuttx/arch/arm/src/stm32/chip/stm32_rng.h new file mode 100644 index 000000000..5e31d5817 --- /dev/null +++ b/nuttx/arch/arm/src/stm32/chip/stm32_rng.h @@ -0,0 +1,77 @@ +/************************************************************************************ + * arch/arm/src/stm32/chip/stm32_rng.h + * + * Copyright (C) 2012 Max Holtzberg. All rights reserved. + * Author: Max Holtzberg <mh@uvc.de> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ************************************************************************************/ + +#ifndef __ARCH_ARM_STC_STM32_CHIP_STM32_RNG_H +#define __ARCH_ARM_STC_STM32_CHIP_STM32_RNG_H + +/************************************************************************************ + * Included Files + ************************************************************************************/ + +#include <nuttx/config.h> +#include "chip.h" + +/************************************************************************************ + * Pre-processor Definitions + ************************************************************************************/ + +/* Register Offsets *****************************************************************/ + +#define STM32_RNG_CR_OFFSET 0x0000 /* RNG Control Register */ +#define STM32_RNG_SR_OFFSET 0x0004 /* RNG Status Register */ +#define STM32_RNG_DR_OFFSET 0x0008 /* RNG Data Register */ + +/* Register Addresses ***************************************************************/ + +#define STM32_RNG_CR (STM32_RNG_BASE+STM32_RNG_CR_OFFSET) +#define STM32_RNG_SR (STM32_RNG_BASE+STM32_RNG_SR_OFFSET) +#define STM32_RNG_DR (STM32_RNG_BASE+STM32_RNG_DR_OFFSET) + +/* Register Bitfield Definitions ****************************************************/ + +/* RNG Control Register */ + +#define RNG_CR_RNGEN (1 << 2) /* Bit 2: RNG enable */ +#define RNG_CR_IE (1 << 3) /* Bit 3: Interrupt enable */ + +/* RNG Status Register */ + +#define RNG_SR_DRDY (1 << 0) /* Bit 0: Data ready */ +#define RNG_SR_CECS (1 << 1) /* Bit 1: Clock error current status */ +#define RNG_SR_SECS (1 << 2) /* Bit 2: Seed error current status */ +#define RNG_SR_CEIS (1 << 5) /* Bit 5: Clock error interrupt status */ +#define RNG_SR_SEIS (1 << 6) /* Bit 6: Seed error interrupt status */ + +#endif /* __ARCH_ARM_STC_STM32_CHIP_STM32_RNG_H */ |