mbed official / mbed-dev

mbed library sources. Supersedes mbed-src.

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targets/TARGET_STM/TARGET_STM32F2/device/system_stm32f2xx.c@189:f392fc9709a3, 2019-02-20 (annotated)

Committer:
AnnaBridge
Date:
Wed Feb 20 22:31:08 2019 +0000
Revision:
189:f392fc9709a3
Parent:
170:19eb464bc2be 
mbed library release version 165

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Kojto 170:19eb464bc2be 1 /**
Kojto 170:19eb464bc2be 2 ******************************************************************************
Kojto 170:19eb464bc2be 3 * @file system_stm32f2xx.c
Kojto 170:19eb464bc2be 4 * @author MCD Application Team
Kojto 170:19eb464bc2be 5 * @version V2.2.0
Kojto 170:19eb464bc2be 6 * @date 17-March-2017
Kojto 170:19eb464bc2be 7 * @brief CMSIS Cortex-M3 Device Peripheral Access Layer System Source File.
Kojto 170:19eb464bc2be 8 *
Kojto 170:19eb464bc2be 9 * This file provides two functions and one global variable to be called from
Kojto 170:19eb464bc2be 10 * user application:
Kojto 170:19eb464bc2be 11 * - SystemInit(): This function is called at startup just after reset and
Kojto 170:19eb464bc2be 12 * before branch to main program. This call is made inside
Kojto 170:19eb464bc2be 13 * the "startup_stm32f2xx.s" file.
Kojto 170:19eb464bc2be 14 *
Kojto 170:19eb464bc2be 15 * - SystemCoreClock variable: Contains the core clock (HCLK), it can be used
Kojto 170:19eb464bc2be 16 * by the user application to setup the SysTick
Kojto 170:19eb464bc2be 17 * timer or configure other parameters.
Kojto 170:19eb464bc2be 18 *
Kojto 170:19eb464bc2be 19 * - SystemCoreClockUpdate(): Updates the variable SystemCoreClock and must
Kojto 170:19eb464bc2be 20 * be called whenever the core clock is changed
Kojto 170:19eb464bc2be 21 * during program execution.
Kojto 170:19eb464bc2be 22 *
Kojto 170:19eb464bc2be 23 ******************************************************************************
Kojto 170:19eb464bc2be 24 * @attention
Kojto 170:19eb464bc2be 25 *
Kojto 170:19eb464bc2be 26 * <h2><center>&copy; COPYRIGHT 2016 STMicroelectronics</center></h2>
Kojto 170:19eb464bc2be 27 *
Kojto 170:19eb464bc2be 28 * Redistribution and use in source and binary forms, with or without modification,
Kojto 170:19eb464bc2be 29 * are permitted provided that the following conditions are met:
Kojto 170:19eb464bc2be 30 * 1. Redistributions of source code must retain the above copyright notice,
Kojto 170:19eb464bc2be 31 * this list of conditions and the following disclaimer.
Kojto 170:19eb464bc2be 32 * 2. Redistributions in binary form must reproduce the above copyright notice,
Kojto 170:19eb464bc2be 33 * this list of conditions and the following disclaimer in the documentation
Kojto 170:19eb464bc2be 34 * and/or other materials provided with the distribution.
Kojto 170:19eb464bc2be 35 * 3. Neither the name of STMicroelectronics nor the names of its contributors
Kojto 170:19eb464bc2be 36 * may be used to endorse or promote products derived from this software
Kojto 170:19eb464bc2be 37 * without specific prior written permission.
Kojto 170:19eb464bc2be 38 *
Kojto 170:19eb464bc2be 39 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
Kojto 170:19eb464bc2be 40 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
Kojto 170:19eb464bc2be 41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
Kojto 170:19eb464bc2be 42 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
Kojto 170:19eb464bc2be 43 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
Kojto 170:19eb464bc2be 44 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
Kojto 170:19eb464bc2be 45 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
Kojto 170:19eb464bc2be 46 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
Kojto 170:19eb464bc2be 47 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
Kojto 170:19eb464bc2be 48 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
Kojto 170:19eb464bc2be 49 *
Kojto 170:19eb464bc2be 50 ******************************************************************************
Kojto 170:19eb464bc2be 51 */
Kojto 170:19eb464bc2be 52
Kojto 170:19eb464bc2be 53 /** @addtogroup CMSIS
Kojto 170:19eb464bc2be 54 * @{
Kojto 170:19eb464bc2be 55 */
Kojto 170:19eb464bc2be 56
Kojto 170:19eb464bc2be 57 /** @addtogroup stm32f2xx_system
Kojto 170:19eb464bc2be 58 * @{
Kojto 170:19eb464bc2be 59 */
Kojto 170:19eb464bc2be 60
Kojto 170:19eb464bc2be 61 /** @addtogroup STM32F2xx_System_Private_Includes
Kojto 170:19eb464bc2be 62 * @{
Kojto 170:19eb464bc2be 63 */
Kojto 170:19eb464bc2be 64
Kojto 170:19eb464bc2be 65 #include "stm32f2xx.h"
Kojto 170:19eb464bc2be 66
Kojto 170:19eb464bc2be 67 #if !defined (HSE_VALUE)
Kojto 170:19eb464bc2be 68 #define HSE_VALUE ((uint32_t)25000000) /*!< Default value of the External oscillator in Hz */
Kojto 170:19eb464bc2be 69 #endif /* HSE_VALUE */
Kojto 170:19eb464bc2be 70
Kojto 170:19eb464bc2be 71 #if !defined (HSI_VALUE)
Kojto 170:19eb464bc2be 72 #define HSI_VALUE ((uint32_t)16000000) /*!< Value of the Internal oscillator in Hz*/
Kojto 170:19eb464bc2be 73 #endif /* HSI_VALUE */
Kojto 170:19eb464bc2be 74
Kojto 170:19eb464bc2be 75 /**
Kojto 170:19eb464bc2be 76 * @}
Kojto 170:19eb464bc2be 77 */
Kojto 170:19eb464bc2be 78
Kojto 170:19eb464bc2be 79 /** @addtogroup STM32F2xx_System_Private_TypesDefinitions
Kojto 170:19eb464bc2be 80 * @{
Kojto 170:19eb464bc2be 81 */
Kojto 170:19eb464bc2be 82
Kojto 170:19eb464bc2be 83 /**
Kojto 170:19eb464bc2be 84 * @}
Kojto 170:19eb464bc2be 85 */
Kojto 170:19eb464bc2be 86
Kojto 170:19eb464bc2be 87 /** @addtogroup STM32F2xx_System_Private_Defines
Kojto 170:19eb464bc2be 88 * @{
Kojto 170:19eb464bc2be 89 */
Kojto 170:19eb464bc2be 90 /************************* Miscellaneous Configuration ************************/
Kojto 170:19eb464bc2be 91 /*!< Uncomment the following line if you need to use external SRAM mounted
Kojto 170:19eb464bc2be 92 on STM322xG_EVAL board as data memory */
Kojto 170:19eb464bc2be 93 /* #define DATA_IN_ExtSRAM */
Kojto 170:19eb464bc2be 94
Kojto 170:19eb464bc2be 95 /*!< Uncomment the following line if you need to relocate your vector Table in
Kojto 170:19eb464bc2be 96 Internal SRAM. */
Kojto 170:19eb464bc2be 97 /* #define VECT_TAB_SRAM */
Kojto 170:19eb464bc2be 98 #define VECT_TAB_OFFSET 0x00 /*!< Vector Table base offset field.
Kojto 170:19eb464bc2be 99 This value must be a multiple of 0x200. */
Kojto 170:19eb464bc2be 100 /******************************************************************************/
Kojto 170:19eb464bc2be 101
Kojto 170:19eb464bc2be 102 /**
Kojto 170:19eb464bc2be 103 * @}
Kojto 170:19eb464bc2be 104 */
Kojto 170:19eb464bc2be 105
Kojto 170:19eb464bc2be 106 /** @addtogroup STM32F2xx_System_Private_Macros
Kojto 170:19eb464bc2be 107 * @{
Kojto 170:19eb464bc2be 108 */
Kojto 170:19eb464bc2be 109
Kojto 170:19eb464bc2be 110 /**
Kojto 170:19eb464bc2be 111 * @}
Kojto 170:19eb464bc2be 112 */
Kojto 170:19eb464bc2be 113
Kojto 170:19eb464bc2be 114 /** @addtogroup STM32F2xx_System_Private_Variables
Kojto 170:19eb464bc2be 115 * @{
Kojto 170:19eb464bc2be 116 */
Kojto 170:19eb464bc2be 117
Kojto 170:19eb464bc2be 118 /* This variable can be updated in Three ways :
Kojto 170:19eb464bc2be 119 1) by calling CMSIS function SystemCoreClockUpdate()
Kojto 170:19eb464bc2be 120 2) by calling HAL API function HAL_RCC_GetHCLKFreq()
Kojto 170:19eb464bc2be 121 3) each time HAL_RCC_ClockConfig() is called to configure the system clock frequency
Kojto 170:19eb464bc2be 122 Note: If you use this function to configure the system clock; then there
Kojto 170:19eb464bc2be 123 is no need to call the 2 first functions listed above, since SystemCoreClock
Kojto 170:19eb464bc2be 124 variable is updated automatically.
Kojto 170:19eb464bc2be 125 */
Kojto 170:19eb464bc2be 126 uint32_t SystemCoreClock = 16000000;
Kojto 170:19eb464bc2be 127 const uint8_t AHBPrescTable[16] = {0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3, 4, 6, 7, 8, 9};
Kojto 170:19eb464bc2be 128 const uint8_t APBPrescTable[8] = {0, 0, 0, 0, 1, 2, 3, 4};
Kojto 170:19eb464bc2be 129 /**
Kojto 170:19eb464bc2be 130 * @}
Kojto 170:19eb464bc2be 131 */
Kojto 170:19eb464bc2be 132
Kojto 170:19eb464bc2be 133 /** @addtogroup STM32F2xx_System_Private_FunctionPrototypes
Kojto 170:19eb464bc2be 134 * @{
Kojto 170:19eb464bc2be 135 */
Kojto 170:19eb464bc2be 136
Kojto 170:19eb464bc2be 137 #ifdef DATA_IN_ExtSRAM
Kojto 170:19eb464bc2be 138 static void SystemInit_ExtMemCtl(void);
Kojto 170:19eb464bc2be 139 #endif /* DATA_IN_ExtSRAM */
Kojto 170:19eb464bc2be 140
Kojto 170:19eb464bc2be 141 /**
Kojto 170:19eb464bc2be 142 * @}
Kojto 170:19eb464bc2be 143 */
Kojto 170:19eb464bc2be 144
Kojto 170:19eb464bc2be 145 /** @addtogroup STM32F2xx_System_Private_Functions
Kojto 170:19eb464bc2be 146 * @{
Kojto 170:19eb464bc2be 147 */
Kojto 170:19eb464bc2be 148
Kojto 170:19eb464bc2be 149 /*+ MBED */
Kojto 170:19eb464bc2be 150 #if 0
Kojto 170:19eb464bc2be 151 /*- MBED */
Kojto 170:19eb464bc2be 152
Kojto 170:19eb464bc2be 153 /**
Kojto 170:19eb464bc2be 154 * @brief Setup the microcontroller system
Kojto 170:19eb464bc2be 155 * Initialize the Embedded Flash Interface, the PLL and update the
Kojto 170:19eb464bc2be 156 * SystemFrequency variable.
Kojto 170:19eb464bc2be 157 * @param None
Kojto 170:19eb464bc2be 158 * @retval None
Kojto 170:19eb464bc2be 159 */
Kojto 170:19eb464bc2be 160 void SystemInit(void)
Kojto 170:19eb464bc2be 161 {
Kojto 170:19eb464bc2be 162 /* Reset the RCC clock configuration to the default reset state ------------*/
Kojto 170:19eb464bc2be 163 /* Set HSION bit */
Kojto 170:19eb464bc2be 164 RCC->CR |= (uint32_t)0x00000001;
Kojto 170:19eb464bc2be 165
Kojto 170:19eb464bc2be 166 /* Reset CFGR register */
Kojto 170:19eb464bc2be 167 RCC->CFGR = 0x00000000;
Kojto 170:19eb464bc2be 168
Kojto 170:19eb464bc2be 169 /* Reset HSEON, CSSON and PLLON bits */
Kojto 170:19eb464bc2be 170 RCC->CR &= (uint32_t)0xFEF6FFFF;
Kojto 170:19eb464bc2be 171
Kojto 170:19eb464bc2be 172 /* Reset PLLCFGR register */
Kojto 170:19eb464bc2be 173 RCC->PLLCFGR = 0x24003010;
Kojto 170:19eb464bc2be 174
Kojto 170:19eb464bc2be 175 /* Reset HSEBYP bit */
Kojto 170:19eb464bc2be 176 RCC->CR &= (uint32_t)0xFFFBFFFF;
Kojto 170:19eb464bc2be 177
Kojto 170:19eb464bc2be 178 /* Disable all interrupts */
Kojto 170:19eb464bc2be 179 RCC->CIR = 0x00000000;
Kojto 170:19eb464bc2be 180
Kojto 170:19eb464bc2be 181 #ifdef DATA_IN_ExtSRAM
Kojto 170:19eb464bc2be 182 SystemInit_ExtMemCtl();
Kojto 170:19eb464bc2be 183 #endif /* DATA_IN_ExtSRAM */
Kojto 170:19eb464bc2be 184
Kojto 170:19eb464bc2be 185 /* Configure the Vector Table location add offset address ------------------*/
Kojto 170:19eb464bc2be 186 #ifdef VECT_TAB_SRAM
Kojto 170:19eb464bc2be 187 SCB->VTOR = SRAM_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal SRAM */
Kojto 170:19eb464bc2be 188 #else
Kojto 170:19eb464bc2be 189 SCB->VTOR = FLASH_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal FLASH */
Kojto 170:19eb464bc2be 190 #endif
Kojto 170:19eb464bc2be 191 }
Kojto 170:19eb464bc2be 192
Kojto 170:19eb464bc2be 193 /*+ MBED */
Kojto 170:19eb464bc2be 194 #endif
Kojto 170:19eb464bc2be 195 /*- MBED */
Kojto 170:19eb464bc2be 196
Kojto 170:19eb464bc2be 197 /**
Kojto 170:19eb464bc2be 198 * @brief Update SystemCoreClock variable according to Clock Register Values.
Kojto 170:19eb464bc2be 199 * The SystemCoreClock variable contains the core clock (HCLK), it can
Kojto 170:19eb464bc2be 200 * be used by the user application to setup the SysTick timer or configure
Kojto 170:19eb464bc2be 201 * other parameters.
Kojto 170:19eb464bc2be 202 *
Kojto 170:19eb464bc2be 203 * @note Each time the core clock (HCLK) changes, this function must be called
Kojto 170:19eb464bc2be 204 * to update SystemCoreClock variable value. Otherwise, any configuration
Kojto 170:19eb464bc2be 205 * based on this variable will be incorrect.
Kojto 170:19eb464bc2be 206 *
Kojto 170:19eb464bc2be 207 * @note - The system frequency computed by this function is not the real
Kojto 170:19eb464bc2be 208 * frequency in the chip. It is calculated based on the predefined
Kojto 170:19eb464bc2be 209 * constant and the selected clock source:
Kojto 170:19eb464bc2be 210 *
Kojto 170:19eb464bc2be 211 * - If SYSCLK source is HSI, SystemCoreClock will contain the HSI_VALUE(*)
Kojto 170:19eb464bc2be 212 *
Kojto 170:19eb464bc2be 213 * - If SYSCLK source is HSE, SystemCoreClock will contain the HSE_VALUE(**)
Kojto 170:19eb464bc2be 214 *
Kojto 170:19eb464bc2be 215 * - If SYSCLK source is PLL, SystemCoreClock will contain the HSE_VALUE(**)
Kojto 170:19eb464bc2be 216 * or HSI_VALUE(*) multiplied/divided by the PLL factors.
Kojto 170:19eb464bc2be 217 *
Kojto 170:19eb464bc2be 218 * (*) HSI_VALUE is a constant defined in stm32f2xx_hal_conf.h file (default value
Kojto 170:19eb464bc2be 219 * 16 MHz) but the real value may vary depending on the variations
Kojto 170:19eb464bc2be 220 * in voltage and temperature.
Kojto 170:19eb464bc2be 221 *
Kojto 170:19eb464bc2be 222 * (**) HSE_VALUE is a constant defined in stm32f2xx_hal_conf.h file (its value
Kojto 170:19eb464bc2be 223 * depends on the application requirements), user has to ensure that HSE_VALUE
Kojto 170:19eb464bc2be 224 * is same as the real frequency of the crystal used. Otherwise, this function
Kojto 170:19eb464bc2be 225 * may have wrong result.
Kojto 170:19eb464bc2be 226 *
Kojto 170:19eb464bc2be 227 * - The result of this function could be not correct when using fractional
Kojto 170:19eb464bc2be 228 * value for HSE crystal.
Kojto 170:19eb464bc2be 229 *
Kojto 170:19eb464bc2be 230 * @param None
Kojto 170:19eb464bc2be 231 * @retval None
Kojto 170:19eb464bc2be 232 */
Kojto 170:19eb464bc2be 233 void SystemCoreClockUpdate(void)
Kojto 170:19eb464bc2be 234 {
Kojto 170:19eb464bc2be 235 uint32_t tmp = 0, pllvco = 0, pllp = 2, pllsource = 0, pllm = 2;
Kojto 170:19eb464bc2be 236
Kojto 170:19eb464bc2be 237 /* Get SYSCLK source -------------------------------------------------------*/
Kojto 170:19eb464bc2be 238 tmp = RCC->CFGR & RCC_CFGR_SWS;
Kojto 170:19eb464bc2be 239
Kojto 170:19eb464bc2be 240 switch (tmp)
Kojto 170:19eb464bc2be 241 {
Kojto 170:19eb464bc2be 242 case 0x00: /* HSI used as system clock source */
Kojto 170:19eb464bc2be 243 SystemCoreClock = HSI_VALUE;
Kojto 170:19eb464bc2be 244 break;
Kojto 170:19eb464bc2be 245 case 0x04: /* HSE used as system clock source */
Kojto 170:19eb464bc2be 246 SystemCoreClock = HSE_VALUE;
Kojto 170:19eb464bc2be 247 break;
Kojto 170:19eb464bc2be 248 case 0x08: /* PLL used as system clock source */
Kojto 170:19eb464bc2be 249
Kojto 170:19eb464bc2be 250 /* PLL_VCO = (HSE_VALUE or HSI_VALUE / PLL_M) * PLL_N
Kojto 170:19eb464bc2be 251 SYSCLK = PLL_VCO / PLL_P
Kojto 170:19eb464bc2be 252 */
Kojto 170:19eb464bc2be 253 pllsource = (RCC->PLLCFGR & RCC_PLLCFGR_PLLSRC) >> 22;
Kojto 170:19eb464bc2be 254 pllm = RCC->PLLCFGR & RCC_PLLCFGR_PLLM;
Kojto 170:19eb464bc2be 255
Kojto 170:19eb464bc2be 256 if (pllsource != 0)
Kojto 170:19eb464bc2be 257 {
Kojto 170:19eb464bc2be 258 /* HSE used as PLL clock source */
Kojto 170:19eb464bc2be 259 pllvco = (HSE_VALUE / pllm) * ((RCC->PLLCFGR & RCC_PLLCFGR_PLLN) >> 6);
Kojto 170:19eb464bc2be 260 }
Kojto 170:19eb464bc2be 261 else
Kojto 170:19eb464bc2be 262 {
Kojto 170:19eb464bc2be 263 /* HSI used as PLL clock source */
Kojto 170:19eb464bc2be 264 pllvco = (HSI_VALUE / pllm) * ((RCC->PLLCFGR & RCC_PLLCFGR_PLLN) >> 6);
Kojto 170:19eb464bc2be 265 }
Kojto 170:19eb464bc2be 266
Kojto 170:19eb464bc2be 267 pllp = (((RCC->PLLCFGR & RCC_PLLCFGR_PLLP) >>16) + 1 ) *2;
Kojto 170:19eb464bc2be 268 SystemCoreClock = pllvco/pllp;
Kojto 170:19eb464bc2be 269 break;
Kojto 170:19eb464bc2be 270 default:
Kojto 170:19eb464bc2be 271 SystemCoreClock = HSI_VALUE;
Kojto 170:19eb464bc2be 272 break;
Kojto 170:19eb464bc2be 273 }
Kojto 170:19eb464bc2be 274 /* Compute HCLK frequency --------------------------------------------------*/
Kojto 170:19eb464bc2be 275 /* Get HCLK prescaler */
Kojto 170:19eb464bc2be 276 tmp = AHBPrescTable[((RCC->CFGR & RCC_CFGR_HPRE) >> 4)];
Kojto 170:19eb464bc2be 277 /* HCLK frequency */
Kojto 170:19eb464bc2be 278 SystemCoreClock >>= tmp;
Kojto 170:19eb464bc2be 279 }
Kojto 170:19eb464bc2be 280
Kojto 170:19eb464bc2be 281 #ifdef DATA_IN_ExtSRAM
Kojto 170:19eb464bc2be 282 /**
Kojto 170:19eb464bc2be 283 * @brief Setup the external memory controller.
Kojto 170:19eb464bc2be 284 * Called in startup_stm32f2xx.s before jump to main.
Kojto 170:19eb464bc2be 285 * This function configures the external SRAM mounted on STM322xG_EVAL board
Kojto 170:19eb464bc2be 286 * This SRAM will be used as program data memory (including heap and stack).
Kojto 170:19eb464bc2be 287 * @param None
Kojto 170:19eb464bc2be 288 * @retval None
Kojto 170:19eb464bc2be 289 */
Kojto 170:19eb464bc2be 290 void SystemInit_ExtMemCtl(void)
Kojto 170:19eb464bc2be 291 {
Kojto 170:19eb464bc2be 292 __IO uint32_t tmp = 0x00;
Kojto 170:19eb464bc2be 293
Kojto 170:19eb464bc2be 294 /*-- GPIOs Configuration -----------------------------------------------------*/
Kojto 170:19eb464bc2be 295 /* Enable GPIOD, GPIOE, GPIOF and GPIOG interface clock */
Kojto 170:19eb464bc2be 296 RCC->AHB1ENR |= 0x00000078;
Kojto 170:19eb464bc2be 297 /* Delay after an RCC peripheral clock enabling */
Kojto 170:19eb464bc2be 298 tmp = READ_BIT(RCC->AHB1ENR, RCC_AHB1ENR_GPIODEN);
Kojto 170:19eb464bc2be 299 (void)(tmp);
Kojto 170:19eb464bc2be 300
Kojto 170:19eb464bc2be 301 /* Connect PDx pins to FSMC Alternate function */
Kojto 170:19eb464bc2be 302 GPIOD->AFR[0] = 0x00CCC0CC;
Kojto 170:19eb464bc2be 303 GPIOD->AFR[1] = 0xCCCCCCCC;
Kojto 170:19eb464bc2be 304 /* Configure PDx pins in Alternate function mode */
Kojto 170:19eb464bc2be 305 GPIOD->MODER = 0xAAAA0A8A;
Kojto 170:19eb464bc2be 306 /* Configure PDx pins speed to 100 MHz */
Kojto 170:19eb464bc2be 307 GPIOD->OSPEEDR = 0xFFFF0FCF;
Kojto 170:19eb464bc2be 308 /* Configure PDx pins Output type to push-pull */
Kojto 170:19eb464bc2be 309 GPIOD->OTYPER = 0x00000000;
Kojto 170:19eb464bc2be 310 /* No pull-up, pull-down for PDx pins */
Kojto 170:19eb464bc2be 311 GPIOD->PUPDR = 0x00000000;
Kojto 170:19eb464bc2be 312
Kojto 170:19eb464bc2be 313 /* Connect PEx pins to FSMC Alternate function */
Kojto 170:19eb464bc2be 314 GPIOE->AFR[0] = 0xC00CC0CC;
Kojto 170:19eb464bc2be 315 GPIOE->AFR[1] = 0xCCCCCCCC;
Kojto 170:19eb464bc2be 316 /* Configure PEx pins in Alternate function mode */
Kojto 170:19eb464bc2be 317 GPIOE->MODER = 0xAAAA828A;
Kojto 170:19eb464bc2be 318 /* Configure PEx pins speed to 100 MHz */
Kojto 170:19eb464bc2be 319 GPIOE->OSPEEDR = 0xFFFFC3CF;
Kojto 170:19eb464bc2be 320 /* Configure PEx pins Output type to push-pull */
Kojto 170:19eb464bc2be 321 GPIOE->OTYPER = 0x00000000;
Kojto 170:19eb464bc2be 322 /* No pull-up, pull-down for PEx pins */
Kojto 170:19eb464bc2be 323 GPIOE->PUPDR = 0x00000000;
Kojto 170:19eb464bc2be 324
Kojto 170:19eb464bc2be 325 /* Connect PFx pins to FSMC Alternate function */
Kojto 170:19eb464bc2be 326 GPIOF->AFR[0] = 0x00CCCCCC;
Kojto 170:19eb464bc2be 327 GPIOF->AFR[1] = 0xCCCC0000;
Kojto 170:19eb464bc2be 328 /* Configure PFx pins in Alternate function mode */
Kojto 170:19eb464bc2be 329 GPIOF->MODER = 0xAA000AAA;
Kojto 170:19eb464bc2be 330 /* Configure PFx pins speed to 100 MHz */
Kojto 170:19eb464bc2be 331 GPIOF->OSPEEDR = 0xFF000FFF;
Kojto 170:19eb464bc2be 332 /* Configure PFx pins Output type to push-pull */
Kojto 170:19eb464bc2be 333 GPIOF->OTYPER = 0x00000000;
Kojto 170:19eb464bc2be 334 /* No pull-up, pull-down for PFx pins */
Kojto 170:19eb464bc2be 335 GPIOF->PUPDR = 0x00000000;
Kojto 170:19eb464bc2be 336
Kojto 170:19eb464bc2be 337 /* Connect PGx pins to FSMC Alternate function */
Kojto 170:19eb464bc2be 338 GPIOG->AFR[0] = 0x00CCCCCC;
Kojto 170:19eb464bc2be 339 GPIOG->AFR[1] = 0x000000C0;
Kojto 170:19eb464bc2be 340 /* Configure PGx pins in Alternate function mode */
Kojto 170:19eb464bc2be 341 GPIOG->MODER = 0x00085AAA;
Kojto 170:19eb464bc2be 342 /* Configure PGx pins speed to 100 MHz */
Kojto 170:19eb464bc2be 343 GPIOG->OSPEEDR = 0x000CAFFF;
Kojto 170:19eb464bc2be 344 /* Configure PGx pins Output type to push-pull */
Kojto 170:19eb464bc2be 345 GPIOG->OTYPER = 0x00000000;
Kojto 170:19eb464bc2be 346 /* No pull-up, pull-down for PGx pins */
Kojto 170:19eb464bc2be 347 GPIOG->PUPDR = 0x00000000;
Kojto 170:19eb464bc2be 348
Kojto 170:19eb464bc2be 349 /*--FSMC Configuration -------------------------------------------------------*/
Kojto 170:19eb464bc2be 350 /* Enable the FSMC interface clock */
Kojto 170:19eb464bc2be 351 RCC->AHB3ENR |= 0x00000001;
Kojto 170:19eb464bc2be 352
Kojto 170:19eb464bc2be 353 /* Configure and enable Bank1_SRAM2 */
Kojto 170:19eb464bc2be 354 FSMC_Bank1->BTCR[2] = 0x00001011;
Kojto 170:19eb464bc2be 355 FSMC_Bank1->BTCR[3] = 0x00000201;
Kojto 170:19eb464bc2be 356 FSMC_Bank1E->BWTR[2] = 0x0FFFFFFF;
Kojto 170:19eb464bc2be 357 }
Kojto 170:19eb464bc2be 358 #endif /* DATA_IN_ExtSRAM */
Kojto 170:19eb464bc2be 359
Kojto 170:19eb464bc2be 360
Kojto 170:19eb464bc2be 361 /**
Kojto 170:19eb464bc2be 362 * @}
Kojto 170:19eb464bc2be 363 */
Kojto 170:19eb464bc2be 364
Kojto 170:19eb464bc2be 365 /**
Kojto 170:19eb464bc2be 366 * @}
Kojto 170:19eb464bc2be 367 */
Kojto 170:19eb464bc2be 368
Kojto 170:19eb464bc2be 369 /**
Kojto 170:19eb464bc2be 370 * @}
Kojto 170:19eb464bc2be 371 */
Kojto 170:19eb464bc2be 372 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/