shimun/solo
1
0
Fork 0
Code Issues Pull Requests Releases 1 Wiki Activity

add rng

Browse Source
This commit is contained in:
Conor Patrick 2018-10-21 12:01:36 -04:00
parent 2108f0f286
commit fac29a5f7b
8 changed files with 725 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
targets/stm32l442/Makefile
View File

@ -2,7 +2,9 @@ CC=arm-none-eabi-gcc
CP=arm-none-eabi-objcopy
SZ=arm-none-eabi-size
SRC=src/main.c src/init.c src/redirect.c src/flash.c src/startup_stm32l432xx.s src/system_stm32l4xx.c $(wildcard lib/*c)
SRC=src/main.c src/init.c src/redirect.c src/flash.c src/rng.c \
src/startup_stm32l432xx.s src/system_stm32l4xx.c $(wildcard lib/*c)
OBJ=$(SRC:.c=.o)
INC=-Isrc/ -Isrc/cmsis -Ilib/
LDSCRIPT=stm32l432xx.ld
@ -18,7 +20,7 @@ HW=-mcpu=cortex-m4 -mfpu=fpv4-sp-d16 -mfloat-abi=hard -mthumb
CHIP=STM32L442xx
CFLAGS=$(INC) -c -D$(CHIP) -DUSE_FULL_LL_DRIVER -O0 -Wall -fdata-sections -ffunction-sections
LDFLAGS=$(HW) -specs=nano.specs -specs=nosys.specs -T$(LDSCRIPT) -Wl,-Map=$(TARGET).map,--cref -Wl,--gc-sections
LDFLAGS=$(HW) -specs=nano.specs -specs=nosys.specs -T$(LDSCRIPT) -Wl,-Map=$(TARGET).map,--cref -Wl,--gc-sections -u _printf_float
.PRECIOUS: %.o
@ -39,7 +41,7 @@ all: $(TARGET).elf
$(CP) -O ihex $^ $(TARGET).hex
clean:
rm -f *.o src/*.o src/*.elf *.elf
rm -f *.o src/*.o src/*.elf *.elf *.hex
flash: $(TARGET).hex
STM32_Programmer_CLI -c port=SWD -halt -d $(TARGET).hex -rst

162
targets/stm32l442/lib/stm32l4xx_ll_rng.c Normal file
View File

@ -0,0 +1,162 @@
/**
******************************************************************************
* @file stm32l4xx_ll_rng.c
* @author MCD Application Team
* @brief RNG LL module driver.
******************************************************************************
* @attention
*
* <h2><center>&copy; COPYRIGHT(c) 2017 STMicroelectronics</center></h2>
*
* 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 of STMicroelectronics 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 HOLDER 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.
*
******************************************************************************
*/
#if defined(USE_FULL_LL_DRIVER)
/* Includes ------------------------------------------------------------------*/
#include "stm32l4xx_ll_rng.h"
#include "stm32l4xx_ll_bus.h"
#ifdef USE_FULL_ASSERT
#include "stm32_assert.h"
#else
#define assert_param(expr) ((void)0U)
#endif
/** @addtogroup STM32L4xx_LL_Driver
* @{
*/
#if defined (RNG)
/** @addtogroup RNG_LL
* @{
*/
/* Private types -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private constants ---------------------------------------------------------*/
/* Private macros ------------------------------------------------------------*/
/** @addtogroup RNG_LL_Private_Macros
* @{
*/
#if defined(RNG_CR_CED)
#define IS_LL_RNG_CED(__MODE__) (((__MODE__) == LL_RNG_CED_ENABLE) || \
((__MODE__) == LL_RNG_CED_DISABLE))
#endif /* defined(RNG_CR_CED) */
/**
* @}
*/
/* Private function prototypes -----------------------------------------------*/
/* Exported functions --------------------------------------------------------*/
/** @addtogroup RNG_LL_Exported_Functions
* @{
*/
/** @addtogroup RNG_LL_EF_Init
* @{
*/
/**
* @brief De-initialize RNG registers (Registers restored to their default values).
* @param RNGx RNG Instance
* @retval An ErrorStatus enumeration value:
* - SUCCESS: RNG registers are de-initialized
* - ERROR: not applicable
*/
ErrorStatus LL_RNG_DeInit(RNG_TypeDef *RNGx)
{
/* Check the parameters */
assert_param(IS_RNG_ALL_INSTANCE(RNGx));
/* Enable RNG reset state */
LL_AHB2_GRP1_ForceReset(LL_AHB2_GRP1_PERIPH_RNG);
/* Release RNG from reset state */
LL_AHB2_GRP1_ReleaseReset(LL_AHB2_GRP1_PERIPH_RNG);
return (SUCCESS);
}
#if defined(RNG_CR_CED)
/**
* @brief Initialize RNG registers according to the specified parameters in RNG_InitStruct.
* @param RNGx RNG Instance
* @param RNG_InitStruct: pointer to a LL_RNG_InitTypeDef structure
* that contains the configuration information for the specified RNG peripheral.
* @retval An ErrorStatus enumeration value:
* - SUCCESS: RNG registers are initialized according to RNG_InitStruct content
* - ERROR: not applicable
*/
ErrorStatus LL_RNG_Init(RNG_TypeDef *RNGx, LL_RNG_InitTypeDef *RNG_InitStruct)
{
/* Check the parameters */
assert_param(IS_RNG_ALL_INSTANCE(RNGx));
assert_param(IS_LL_RNG_CED(RNG_InitStruct->ClockErrorDetection));
/* Clock Error Detection configuration */
MODIFY_REG(RNGx->CR, RNG_CR_CED, RNG_InitStruct->ClockErrorDetection);
return (SUCCESS);
}
/**
* @brief Set each @ref LL_RNG_InitTypeDef field to default value.
* @param RNG_InitStruct: pointer to a @ref LL_RNG_InitTypeDef structure
* whose fields will be set to default values.
* @retval None
*/
void LL_RNG_StructInit(LL_RNG_InitTypeDef *RNG_InitStruct)
{
/* Set RNG_InitStruct fields to default values */
RNG_InitStruct->ClockErrorDetection = LL_RNG_CED_ENABLE;
}
#endif /* defined(RNG_CR_CED) */
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/
#endif /* defined (RNG) */
/**
* @}
*/
#endif /* USE_FULL_LL_DRIVER */
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/

428
targets/stm32l442/lib/stm32l4xx_ll_rng.h Normal file
View File

@ -0,0 +1,428 @@
/**
******************************************************************************
* @file stm32l4xx_ll_rng.h
* @author MCD Application Team
* @brief Header file of RNG LL module.
******************************************************************************
* @attention
*
* <h2><center>&copy; COPYRIGHT(c) 2017 STMicroelectronics</center></h2>
*
* 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 of STMicroelectronics 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 HOLDER 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.
*
******************************************************************************
*/
/* Define to prevent recursive inclusion -------------------------------------*/
#ifndef __STM32L4xx_LL_RNG_H
#define __STM32L4xx_LL_RNG_H
#ifdef __cplusplus
extern "C" {
#endif
/* Includes ------------------------------------------------------------------*/
#include "stm32l4xx.h"
/** @addtogroup STM32L4xx_LL_Driver
* @{
*/
#if defined(RNG)
/** @defgroup RNG_LL RNG
* @{
*/
/* Private types -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private constants ---------------------------------------------------------*/
/* Private macros ------------------------------------------------------------*/
/* Exported types ------------------------------------------------------------*/
#if defined(USE_FULL_LL_DRIVER)
/** @defgroup RNG_LL_ES_Init_Struct RNG Exported Init structures
* @{
*/
#if defined(RNG_CR_CED)
/**
* @brief LL RNG Init Structure Definition
*/
typedef struct
{
uint32_t ClockErrorDetection; /*!< Clock error detection.
This parameter can be one value of @ref RNG_LL_CED.
This parameter can be modified using unitary functions @ref LL_RNG_EnableClkErrorDetect(). */
}LL_RNG_InitTypeDef;
#endif /* defined(RNG_CR_CED) */
/**
* @}
*/
#endif /* USE_FULL_LL_DRIVER */
/* Exported constants --------------------------------------------------------*/
/** @defgroup RNG_LL_Exported_Constants RNG Exported Constants
* @{
*/
#if defined(RNG_CR_CED)
/** @defgroup RNG_LL_CED Clock Error Detection
* @{
*/
#define LL_RNG_CED_ENABLE 0x00000000U /*!< Clock error detection enabled */
#define LL_RNG_CED_DISABLE RNG_CR_CED /*!< Clock error detection disabled */
/**
* @}
*/
#endif /* defined(RNG_CR_CED) */
/** @defgroup RNG_LL_EC_GET_FLAG Get Flags Defines
* @brief Flags defines which can be used with LL_RNG_ReadReg function
* @{
*/
#define LL_RNG_SR_DRDY RNG_SR_DRDY /*!< Register contains valid random data */
#define LL_RNG_SR_CECS RNG_SR_CECS /*!< Clock error current status */
#define LL_RNG_SR_SECS RNG_SR_SECS /*!< Seed error current status */
#define LL_RNG_SR_CEIS RNG_SR_CEIS /*!< Clock error interrupt status */
#define LL_RNG_SR_SEIS RNG_SR_SEIS /*!< Seed error interrupt status */
/**
* @}
*/
/** @defgroup RNG_LL_EC_IT IT Defines
* @brief IT defines which can be used with LL_RNG_ReadReg and LL_RNG_WriteReg macros
* @{
*/
#define LL_RNG_CR_IE RNG_CR_IE /*!< RNG Interrupt enable */
/**
* @}
*/
/**
* @}
*/
/* Exported macro ------------------------------------------------------------*/
/** @defgroup RNG_LL_Exported_Macros RNG Exported Macros
* @{
*/
/** @defgroup RNG_LL_EM_WRITE_READ Common Write and read registers Macros
* @{
*/
/**
* @brief Write a value in RNG register
* @param __INSTANCE__ RNG Instance
* @param __REG__ Register to be written
* @param __VALUE__ Value to be written in the register
* @retval None
*/
#define LL_RNG_WriteReg(__INSTANCE__, __REG__, __VALUE__) WRITE_REG(__INSTANCE__->__REG__, (__VALUE__))
/**
* @brief Read a value in RNG register
* @param __INSTANCE__ RNG Instance
* @param __REG__ Register to be read
* @retval Register value
*/
#define LL_RNG_ReadReg(__INSTANCE__, __REG__) READ_REG(__INSTANCE__->__REG__)
/**
* @}
*/
/**
* @}
*/
/* Exported functions --------------------------------------------------------*/
/** @defgroup RNG_LL_Exported_Functions RNG Exported Functions
* @{
*/
/** @defgroup RNG_LL_EF_Configuration RNG Configuration functions
* @{
*/
/**
* @brief Enable Random Number Generation
* @rmtoll CR RNGEN LL_RNG_Enable
* @param RNGx RNG Instance
* @retval None
*/
__STATIC_INLINE void LL_RNG_Enable(RNG_TypeDef *RNGx)
{
SET_BIT(RNGx->CR, RNG_CR_RNGEN);
}
/**
* @brief Disable Random Number Generation
* @rmtoll CR RNGEN LL_RNG_Disable
* @param RNGx RNG Instance
* @retval None
*/
__STATIC_INLINE void LL_RNG_Disable(RNG_TypeDef *RNGx)
{
CLEAR_BIT(RNGx->CR, RNG_CR_RNGEN);
}
/**
* @brief Check if Random Number Generator is enabled
* @rmtoll CR RNGEN LL_RNG_IsEnabled
* @param RNGx RNG Instance
* @retval State of bit (1 or 0).
*/
__STATIC_INLINE uint32_t LL_RNG_IsEnabled(RNG_TypeDef *RNGx)
{
return (READ_BIT(RNGx->CR, RNG_CR_RNGEN) == (RNG_CR_RNGEN));
}
#if defined(RNG_CR_CED)
/**
* @brief Enable RNG Clock Error Detection
* @rmtoll CR CED LL_RNG_EnableClkErrorDetect
* @param RNGx RNG Instance
* @retval None
*/
__STATIC_INLINE void LL_RNG_EnableClkErrorDetect(RNG_TypeDef *RNGx)
{
CLEAR_BIT(RNGx->CR, RNG_CR_CED);
}
/**
* @brief Disable RNG Clock Error Detection
* @rmtoll CR CED LL_RNG_DisableClkErrorDetect
* @param RNGx RNG Instance
* @retval None
*/
__STATIC_INLINE void LL_RNG_DisableClkErrorDetect(RNG_TypeDef *RNGx)
{
SET_BIT(RNGx->CR, RNG_CR_CED);
}
/**
* @brief Check if RNG Clock Error Detection is enabled
* @rmtoll CR CED LL_RNG_IsEnabledClkErrorDetect
* @param RNGx RNG Instance
* @retval State of bit (1 or 0).
*/
__STATIC_INLINE uint32_t LL_RNG_IsEnabledClkErrorDetect(RNG_TypeDef *RNGx)
{
return (!(READ_BIT(RNGx->CR, RNG_CR_CED) == (RNG_CR_CED)));
}
#endif /* defined(RNG_CR_CED) */
/**
* @}
*/
/** @defgroup RNG_LL_EF_FLAG_Management FLAG Management
* @{
*/
/**
* @brief Indicate if the RNG Data ready Flag is set or not
* @rmtoll SR DRDY LL_RNG_IsActiveFlag_DRDY
* @param RNGx RNG Instance
* @retval State of bit (1 or 0).
*/
__STATIC_INLINE uint32_t LL_RNG_IsActiveFlag_DRDY(RNG_TypeDef *RNGx)
{
return (READ_BIT(RNGx->SR, RNG_SR_DRDY) == (RNG_SR_DRDY));
}
/**
* @brief Indicate if the Clock Error Current Status Flag is set or not
* @rmtoll SR CECS LL_RNG_IsActiveFlag_CECS
* @param RNGx RNG Instance
* @retval State of bit (1 or 0).
*/
__STATIC_INLINE uint32_t LL_RNG_IsActiveFlag_CECS(RNG_TypeDef *RNGx)
{
return (READ_BIT(RNGx->SR, RNG_SR_CECS) == (RNG_SR_CECS));
}
/**
* @brief Indicate if the Seed Error Current Status Flag is set or not
* @rmtoll SR SECS LL_RNG_IsActiveFlag_SECS
* @param RNGx RNG Instance
* @retval State of bit (1 or 0).
*/
__STATIC_INLINE uint32_t LL_RNG_IsActiveFlag_SECS(RNG_TypeDef *RNGx)
{
return (READ_BIT(RNGx->SR, RNG_SR_SECS) == (RNG_SR_SECS));
}
/**
* @brief Indicate if the Clock Error Interrupt Status Flag is set or not
* @rmtoll SR CEIS LL_RNG_IsActiveFlag_CEIS
* @param RNGx RNG Instance
* @retval State of bit (1 or 0).
*/
__STATIC_INLINE uint32_t LL_RNG_IsActiveFlag_CEIS(RNG_TypeDef *RNGx)
{
return (READ_BIT(RNGx->SR, RNG_SR_CEIS) == (RNG_SR_CEIS));
}
/**
* @brief Indicate if the Seed Error Interrupt Status Flag is set or not
* @rmtoll SR SEIS LL_RNG_IsActiveFlag_SEIS
* @param RNGx RNG Instance
* @retval State of bit (1 or 0).
*/
__STATIC_INLINE uint32_t LL_RNG_IsActiveFlag_SEIS(RNG_TypeDef *RNGx)
{
return (READ_BIT(RNGx->SR, RNG_SR_SEIS) == (RNG_SR_SEIS));
}
/**
* @brief Clear Clock Error interrupt Status (CEIS) Flag
* @rmtoll SR CEIS LL_RNG_ClearFlag_CEIS
* @param RNGx RNG Instance
* @retval None
*/
__STATIC_INLINE void LL_RNG_ClearFlag_CEIS(RNG_TypeDef *RNGx)
{
WRITE_REG(RNGx->SR, ~RNG_SR_CEIS);
}
/**
* @brief Clear Seed Error interrupt Status (SEIS) Flag
* @rmtoll SR SEIS LL_RNG_ClearFlag_SEIS
* @param RNGx RNG Instance
* @retval None
*/
__STATIC_INLINE void LL_RNG_ClearFlag_SEIS(RNG_TypeDef *RNGx)
{
WRITE_REG(RNGx->SR, ~RNG_SR_SEIS);
}
/**
* @}
*/
/** @defgroup RNG_LL_EF_IT_Management IT Management
* @{
*/
/**
* @brief Enable Random Number Generator Interrupt
* (applies for either Seed error, Clock Error or Data ready interrupts)
* @rmtoll CR IE LL_RNG_EnableIT
* @param RNGx RNG Instance
* @retval None
*/
__STATIC_INLINE void LL_RNG_EnableIT(RNG_TypeDef *RNGx)
{
SET_BIT(RNGx->CR, RNG_CR_IE);
}
/**
* @brief Disable Random Number Generator Interrupt
* (applies for either Seed error, Clock Error or Data ready interrupts)
* @rmtoll CR IE LL_RNG_DisableIT
* @param RNGx RNG Instance
* @retval None
*/
__STATIC_INLINE void LL_RNG_DisableIT(RNG_TypeDef *RNGx)
{
CLEAR_BIT(RNGx->CR, RNG_CR_IE);
}
/**
* @brief Check if Random Number Generator Interrupt is enabled
* (applies for either Seed error, Clock Error or Data ready interrupts)
* @rmtoll CR IE LL_RNG_IsEnabledIT
* @param RNGx RNG Instance
* @retval State of bit (1 or 0).
*/
__STATIC_INLINE uint32_t LL_RNG_IsEnabledIT(RNG_TypeDef *RNGx)
{
return (READ_BIT(RNGx->CR, RNG_CR_IE) == (RNG_CR_IE));
}
/**
* @}
*/
/** @defgroup RNG_LL_EF_Data_Management Data Management
* @{
*/
/**
* @brief Return32-bit Random Number value
* @rmtoll DR RNDATA LL_RNG_ReadRandData32
* @param RNGx RNG Instance
* @retval Generated 32-bit random value
*/
__STATIC_INLINE uint32_t LL_RNG_ReadRandData32(RNG_TypeDef *RNGx)
{
return (uint32_t)(READ_REG(RNGx->DR));
}
/**
* @}
*/
#if defined(USE_FULL_LL_DRIVER)
/** @defgroup RNG_LL_EF_Init Initialization and de-initialization functions
* @{
*/
#if defined(RNG_CR_CED)
ErrorStatus LL_RNG_Init(RNG_TypeDef *RNGx, LL_RNG_InitTypeDef *RNG_InitStruct);
void LL_RNG_StructInit(LL_RNG_InitTypeDef *RNG_InitStruct);
#endif /* defined(RNG_CR_CED) */
ErrorStatus LL_RNG_DeInit(RNG_TypeDef *RNGx);
/**
* @}
*/
#endif /* USE_FULL_LL_DRIVER */
/**
* @}
*/
/**
* @}
*/
#endif /* defined(RNG) */
/**
* @}
*/
#ifdef __cplusplus
}
#endif
#endif /* __STM32L4xx_LL_RNG_H */
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/

4
targets/stm32l442/src/flash.h
View File

@ -1,5 +1,5 @@
#ifndef _FLASH_H_H
#define _FLASH_H_H
#ifndef _FLASH_H_
#define _FLASH_H_
void flash_erase_page(uint8_t page);
void flash_write_dword(uint32_t addr, uint64_t data);

14
targets/stm32l442/src/init.c
View File

@ -11,6 +11,7 @@
#include "stm32l4xx_ll_usart.h"
#include "stm32l4xx_ll_bus.h"
#include "stm32l4xx_ll_tim.h"
#include "stm32l4xx_ll_rng.h"
/* USER CODE BEGIN Includes */
@ -30,6 +31,7 @@ static void MX_GPIO_Init(void);
static void MX_USART1_UART_Init(void);
static void MX_TIM2_Init(void);
static void MX_TIM6_Init(void);
static void MX_RNG_Init(void);
#define Error_Handler() _Error_Handler(__FILE__,__LINE__)
void _Error_Handler(char *file, int line);
@ -63,6 +65,7 @@ void hw_init(void)
MX_TIM2_Init();
MX_TIM6_Init();
MX_RNG_Init();
TIM6->SR = 0;
__enable_irq();
@ -299,3 +302,14 @@ static void MX_TIM6_Init(void)
// Start immediately
LL_TIM_EnableCounter(TIM6);
}
/* RNG init function */
static void MX_RNG_Init(void)
{
/* Peripheral clock enable */
LL_AHB2_GRP1_EnableClock(LL_AHB2_GRP1_PERIPH_RNG);
LL_RNG_Enable(RNG);
}

22
targets/stm32l442/src/main.c
View File

@ -15,13 +15,14 @@
#include "app.h"
#include "flash.h"
#include "rng.h"
#define Error_Handler() _Error_Handler(__FILE__,__LINE__)
#define LED_PIN_G LL_GPIO_PIN_0
#define LED_PIN_B LL_GPIO_PIN_1
#define LED_PIN_R LL_GPIO_PIN_2
#define LED_PORT GPIOA
#define LED_PORT GPIOA
void hw_init(void);
@ -140,11 +141,22 @@ void TIM6_DAC_IRQHandler()
__65_seconds += 1;
}
void dump_hex(uint8_t * b, int len)
{
while(len--)
{
printf("%02x ", *b++);
}
printf("\r\n");
}
int main(void)
{
uint8_t str[] = "YouCompleteMe: a code-completion engine for Vim";
uint8_t buf[500];
uint8_t buf[5000];
uint32_t i = 0;
float ent;
float test = 1235.889944f;
hw_init();
printf("hello solo\r\n");
@ -169,6 +181,12 @@ int main(void)
uint32_t t2 = millis();
printf("100 ms delay (%lu)\r\n",t2-t1);
ent = rng_test(64 * 1024);
printf("entropy of 64KB from RNG: %.6f\r\n", ent);
printf("test float: %.2f\r\n", test);
// Test PWM + weighting of RGB
test_colors();

85
targets/stm32l442/src/rng.c Normal file
View File

@ -0,0 +1,85 @@
#include <math.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include "stm32l4xx_ll_rng.h"
#include "rng.h"
int __errno = 0;
void rng_get_bytes(uint8_t * dst, size_t sz)
{
uint8_t r[8];
unsigned int i,j;
for (i = 0; i < sz; i += 4)
{
while( !LL_RNG_IsActiveFlag_DRDY(RNG) )
;
*(uint32_t*)&r = LL_RNG_ReadRandData32(RNG);
if (RNG->SR & 0x66)
{
printf("Error RNG: %02lx\r\n", RNG->SR);
exit(1);
}
for (j = 0; j < 4; j++)
{
if ((i + j) > sz)
{
return;
}
dst[i + j] = r[j];
}
}
}
float shannon_entropy(float * p, size_t sz)
{
unsigned int i;
float entropy = 0.0f;
for(i=0; i < sz; i++)
{
if (p[i] > 0.0)
{
entropy -= p[i] * (float) log( (double) p[i]);
}
}
entropy = entropy / (float) log ((double) 2.0);
return entropy;
}
// Measure shannon entropy of RNG
float rng_test(size_t n)
{
unsigned int i;
int sz = 0;
uint8_t buf[4];
int counts[256];
float p[256];
memset(counts, 0, sizeof(counts));
for(i=0; i < n; i+=4)
{
rng_get_bytes(buf, 4);
sz += 4;
counts[buf[0]]++;
counts[buf[1]]++;
counts[buf[2]]++;
counts[buf[3]]++;
}
for (i = 0; i < 256; i++)
{
p[i] = ((float)counts[i])/sz;
}
return shannon_entropy(p, 256);
}

9
targets/stm32l442/src/rng.h Normal file
View File

@ -0,0 +1,9 @@
#ifndef _RNG_H_
#define _RNG_H_
#include <stdint.h>
void rng_get_bytes(uint8_t * dst, size_t sz);
float shannon_entropy(float * p, size_t sz);
float rng_test(size_t n);
#endif