From e7f5fdebef90d0be01edeabd4ea260138ed1fbd0 Mon Sep 17 00:00:00 2001 From: Fredrik Thulin Date: Mon, 21 Nov 2016 11:45:58 +0100 Subject: add RNG using ChaCha20 as CSPRNG --- src/cc20rng/stm_init.c | 290 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 290 insertions(+) create mode 100644 src/cc20rng/stm_init.c (limited to 'src/cc20rng/stm_init.c') diff --git a/src/cc20rng/stm_init.c b/src/cc20rng/stm_init.c new file mode 100644 index 0000000..548f57b --- /dev/null +++ b/src/cc20rng/stm_init.c @@ -0,0 +1,290 @@ +/** + ****************************************************************************** + * @file GPIO/GPIO_IOToggle/Src/main.c + * @author MCD Application Team + * @version V1.0.1 + * @date 26-February-2014 + * @brief This example describes how to configure and use GPIOs through + * the STM32F4xx HAL API. + ****************************************************************************** + * @attention + * + *

© COPYRIGHT(c) 2014 STMicroelectronics

+ * + * 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. + * + ****************************************************************************** + */ + +/* Includes ------------------------------------------------------------------*/ +#include "stm_init.h" + +/** @addtogroup STM32F4xx_HAL_Examples + * @{ + */ + +/** @addtogroup GPIO_IOToggle + * @{ + */ + +/* Private typedef -----------------------------------------------------------*/ +/* Private define ------------------------------------------------------------*/ + +#define UART1_BAUD_RATE 921600 /* FTDI/USB */ +#define UART2_BAUD_RATE 115200 /* R-Pi GPIO */ + + +/* Private macro -------------------------------------------------------------*/ +/* Private variables ---------------------------------------------------------*/ + +static GPIO_InitTypeDef GPIO_InitStruct; +TIM_HandleTypeDef htim2; +UART_HandleTypeDef huart1; +UART_HandleTypeDef huart2; +DMA_HandleTypeDef hdma_tim; + +/* Private function prototypes -----------------------------------------------*/ +static void SystemClock_Config(void); +static void MX_GPIO_Init(void); +static void MX_TIM2_Init(uint32_t *counters_buf, uint16_t counters); +static void MX_USART1_UART_Init(void); +static void MX_USART2_UART_Init(void); +/* Private functions ---------------------------------------------------------*/ + +extern void Error_Handler(void); + + +/** + * @brief Main program + * @param None + * @retval None + */ +void stm_init(uint32_t *buf0, uint16_t counters) +{ + /* Generic STM32 initialization. + + To proceed, 3 steps are required: */ + + /* STM32F4xx HAL library initialization: + - Configure the Flash prefetch, instruction and Data caches + - Configure the Systick to generate an interrupt each 1 msec + - Set NVIC Group Priority to 4 + - Global MSP (MCU Support Package) initialization + */ + HAL_Init(); + + /* Configure the system clock */ + SystemClock_Config(); + + /* System interrupt init*/ + /* Sets the priority grouping field */ + HAL_NVIC_SetPriorityGrouping(NVIC_PRIORITYGROUP_0); + HAL_NVIC_SetPriority(SysTick_IRQn, 0, 0); + + /* Initialize all configured peripherals */ + MX_GPIO_Init(); + MX_TIM2_Init(buf0, counters); + MX_USART1_UART_Init(); + MX_USART2_UART_Init(); +} + + +/** + * @brief System Clock Configuration + * The system Clock is configured as follow : + * System Clock source = PLL (HSE) + * SYSCLK(Hz) = 42000000 + * HCLK(Hz) = 42000000 + * AHB Prescaler = 1 + * APB1 Prescaler = 1 + * APB2 Prescaler = 1 + * HSI Frequency(Hz) = 16000000 + * PLL_M = 8 + * PLL_N = 336 + * PLL_P = 8 + * PLL_Q = 7 (unused) + * VDD(V) = 3.3 + * Main regulator output voltage = Scale2 mode + * Flash Latency(WS) = 1 + * @param None + * @retval None + */ +static void SystemClock_Config(void) +{ + RCC_ClkInitTypeDef RCC_ClkInitStruct; + RCC_OscInitTypeDef RCC_OscInitStruct; + + /* Enable Power Control clock */ + __PWR_CLK_ENABLE(); + + /* The voltage scaling allows optimizing the power consumption when the device is + clocked below the maximum system frequency, to update the voltage scaling value + regarding system frequency refer to product datasheet. */ + __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE2); + + /* Enable HSE Oscillator and activate PLL with HSE as source. + * + * With 8 MHz HSE oscillator, M=/8, N=*336, P=/8 gives 42 MHz SYSCLK. + * Divider Q is unused in this configuration. + */ + RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE; + RCC_OscInitStruct.HSEState = RCC_HSE_ON; + RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON; + RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE; + RCC_OscInitStruct.PLL.PLLM = 8; + RCC_OscInitStruct.PLL.PLLN = 336; + RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV8; + RCC_OscInitStruct.PLL.PLLQ = 7; + + if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) { + Error_Handler(); + } + + /* Select PLL as system clock source */ + RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_SYSCLK; + RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; + RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; /* AHB prescaler */ + RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1; /* APB1 prescaler /1 gives 42 MHz APB1 */ + RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1; /* APB2 prescaler /1 gives 42 MHz APB2 */ + if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1) != HAL_OK) { + Error_Handler(); + } + +} + + +/** Configure pins as + + PB12 ------> GREEN LED + PB13 ------> YELLOW LED + PB14 ------> GREEN lED + PB15 ------> BLUE LED + PA1 ------> TIM2_CH2 (Avalanche noise) +*/ +void MX_GPIO_Init(void) +{ + /* GPIO Ports Clock Enable */ + __GPIOA_CLK_ENABLE(); + __GPIOB_CLK_ENABLE(); + __GPIOC_CLK_ENABLE(); + + /*Configure LED GPIO pins PB12==red, PB13==yellow, PB14==green, PB15==blue */ + GPIO_InitStruct.Pin = LED_RED | LED_YELLOW | LED_GREEN | LED_BLUE; + GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP; + GPIO_InitStruct.Pull = GPIO_NOPULL; + GPIO_InitStruct.Speed = GPIO_SPEED_LOW; + HAL_GPIO_Init(LED_PORT, &GPIO_InitStruct); + + /* Configure PA1 (TIM2_Channel2) (Avalanche noise trigger) */ + GPIO_InitStruct.Pin = GPIO_PIN_1; + GPIO_InitStruct.Mode = GPIO_MODE_AF_PP; + GPIO_InitStruct.Pull = GPIO_PULLUP; + GPIO_InitStruct.Speed = GPIO_SPEED_HIGH; + GPIO_InitStruct.Alternate = GPIO_AF1_TIM2; + HAL_GPIO_Init(GPIOA, &GPIO_InitStruct); +} + +/* TIM2 init function. + * TIM2 is used in capture mode, triggered off the avalanche noise pin PA1. + */ +void MX_TIM2_Init(uint32_t *counters_buf, uint16_t counters) +{ + TIM_IC_InitTypeDef sICConfig; + + __DMA1_CLK_ENABLE(); + __TIM2_CLK_ENABLE(); + __GPIOA_CLK_ENABLE(); + + htim2.Instance = TIM2; + htim2.Init.Prescaler = 0; + htim2.Init.CounterMode = TIM_COUNTERMODE_UP; + htim2.Init.Period = 0xffff; + htim2.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1; + htim2.Init.RepetitionCounter = 0; + + /* Configure the Input Capture of channel 2. + * Trigger on rising edge. ICFilter = 0 means trigger on every event. + */ + sICConfig.ICPolarity = TIM_ICPOLARITY_RISING; + sICConfig.ICSelection = TIM_ICSELECTION_DIRECTTI; + sICConfig.ICPrescaler = TIM_ICPSC_DIV1; + sICConfig.ICFilter = 0; /* If set - Ignore additional state changes for a short while */ + + if (HAL_TIM_IC_Init(&htim2) != HAL_OK) { + /* Initialization Error */ + Error_Handler(); + } + + if (HAL_TIM_IC_ConfigChannel(&htim2, &sICConfig, TIM_CHANNEL_2) != HAL_OK) { + /* Initialization Error */ + Error_Handler(); + } + + /* Start the TIM input capture operation */ + if (HAL_TIM_IC_Start_DMA(&htim2, TIM_CHANNEL_2, counters_buf, counters) != HAL_OK) { + /* Starting Error */ + Error_Handler(); + } +} + + +/* USART1 init function + * + * USART1 uses PA9 and PA10. + */ +void MX_USART1_UART_Init(void) +{ + huart1.Instance = USART1; + huart1.Init.BaudRate = UART1_BAUD_RATE; + huart1.Init.WordLength = UART_WORDLENGTH_8B; + huart1.Init.StopBits = UART_STOPBITS_1; + huart1.Init.Parity = UART_PARITY_NONE; + huart1.Init.Mode = UART_MODE_TX_RX; + huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE; + huart1.Init.OverSampling = UART_OVERSAMPLING_16; + + if (HAL_UART_Init(&huart1) != HAL_OK) { + /* Initialization Error */ + Error_Handler(); + } +} + +/* USART2 init function */ +void MX_USART2_UART_Init(void) +{ + huart2.Instance = USART2; + huart2.Init.BaudRate = UART2_BAUD_RATE; + huart2.Init.WordLength = UART_WORDLENGTH_8B; + huart2.Init.StopBits = UART_STOPBITS_1; + huart2.Init.Parity = UART_PARITY_NONE; + huart2.Init.Mode = UART_MODE_TX_RX; + huart2.Init.HwFlowCtl = UART_HWCONTROL_NONE; + huart2.Init.OverSampling = UART_OVERSAMPLING_16; + + if (HAL_UART_Init(&huart2) != HAL_OK) { + /* Initialization Error */ + Error_Handler(); + } +} + +/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ -- cgit v1.2.3