Src/main.c (FMC_SRAM)

Outline

Includes

#include "main.h"

Private define

#define BUFFER_SIZE

#define WRITE_READ_ADDR

Private variables

hsram

SRAM_Timing

aTxBuffer

aRxBuffer

uwWriteReadStatus

uwIndex

Private function prototypes

main()

SystemClock_Config()

Error_Handler()

Fill_Buffer(uint32_t *, uint32_t, uint32_t)

Buffercmp(uint32_t *, uint32_t *, uint16_t)

Files

FMC_SRAM

Inc

Src

CMSIS

HAL

STM32469I_EVAL

SourceVuSTM32 Libraries and SamplesFMC_SRAMSrc/main.c

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

178

179

180

181

182

183

184

185

186

187

188

189

190

191

192

193

194

195

196

197

198

199

200

201

202

203

204

205

206

207

208

209

210

211

212

213

214

215

216

217

218

219

220

221

222

223

224

225

226

227

228

229

230

231

232

233

234

235

236

237

238

239

240

241

242

243

244

245

246

247

248

249

250

251

252

253

254

255

256

257

258

259

260

261

262

263

264

265

266

267

268

269

270

271

272

273

274

275

276

277

278

279

280

281

282

283

284

285

286

287

288

289

290

291

292

293

294

295

296

297

298

299

300

301

302

303

304

305

306

307

308

309

310

311

312

313

314

315

/** ****************************************************************************** * @file FMC/FMC_SRAM/Src/main.c * @author MCD Application Team * @brief This sample code shows how to use STM32F4xx FMC HAL API to access * by read and write operation the SRAM external memory device. ****************************************************************************** * @attention * * Copyright (c) 2017 STMicroelectronics. * All rights reserved. * * This software is licensed under terms that can be found in the LICENSE file * in the root directory of this software component. * If no LICENSE file comes with this software, it is provided AS-IS. * ****************************************************************************** */ /* Includes ------------------------------------------------------------------*/ #include "main.h" /** @addtogroup STM32F4xx_HAL_Examples * @{ */ /** @addtogroup FMC_SRAM * @{ */ /* Private typedef -----------------------------------------------------------*/ /* Private define ------------------------------------------------------------*/ #define BUFFER_SIZE ((uint32_t)0x0100) #define WRITE_READ_ADDR ((uint32_t)0x0800) /* Private macro -------------------------------------------------------------*/ /* Private variables ---------------------------------------------------------*/ SRAM_HandleTypeDef hsram; FMC_NORSRAM_TimingTypeDef SRAM_Timing; /* Read/Write Buffers */ uint32_t aTxBuffer[BUFFER_SIZE]; uint32_t aRxBuffer[BUFFER_SIZE]; /* Status variables */ __IO uint32_t uwWriteReadStatus = 0; /* Counter index */ uint32_t uwIndex = 0; /* Private function prototypes -----------------------------------------------*/ static void SystemClock_Config(void); static void Error_Handler(void); static void Fill_Buffer(uint32_t *pBuffer, uint32_t uwBufferLenght, uint32_t uwOffset); static TestStatus Buffercmp(uint32_t *pBuffer1, uint32_t *pBuffer2, uint16_t BufferLength); /* Private functions ---------------------------------------------------------*/ /** * @brief Main program * @param None * @retval None */ int main(void) { /* STM32F4xx HAL library initialization: - Configure the Flash prefetch, instruction and Data caches - Systick timer is configured by default as source of time base, but user can eventually implement his proper time base source (a general purpose timer for example or other time source), keeping in mind that Time base duration should be kept 1ms since PPP_TIMEOUT_VALUEs are defined and handled in milliseconds basis. - Set NVIC Group Priority to 4 - Low Level Initialization: global MSP (MCU Support Package) initialization */ HAL_Init(); /* Configure the system clock to 180 MHz */ SystemClock_Config(); /* Configure LED1 and LED3 */ BSP_LED_Init(LED1); BSP_LED_Init(LED3); /*##-1- Configure the SRAM device ##########################################*/ /* SRAM device configuration */ hsram.Instance = FMC_NORSRAM_DEVICE; hsram.Extended = FMC_NORSRAM_EXTENDED_DEVICE; /* SRAM device configuration */ SRAM_Timing.AddressSetupTime = 2; SRAM_Timing.AddressHoldTime = 1; SRAM_Timing.DataSetupTime = 2; SRAM_Timing.BusTurnAroundDuration = 1; SRAM_Timing.CLKDivision = 2; SRAM_Timing.DataLatency = 2; SRAM_Timing.AccessMode = FMC_ACCESS_MODE_A; hsram.Init.NSBank = FMC_NORSRAM_BANK2; hsram.Init.DataAddressMux = FMC_DATA_ADDRESS_MUX_DISABLE; hsram.Init.MemoryType = FMC_MEMORY_TYPE_SRAM; hsram.Init.MemoryDataWidth = SRAM_MEMORY_WIDTH; hsram.Init.BurstAccessMode = FMC_BURST_ACCESS_MODE_DISABLE; hsram.Init.WaitSignalPolarity = FMC_WAIT_SIGNAL_POLARITY_LOW; hsram.Init.WrapMode = FMC_WRAP_MODE_DISABLE; hsram.Init.WaitSignalActive = FMC_WAIT_TIMING_BEFORE_WS; hsram.Init.WriteOperation = FMC_WRITE_OPERATION_ENABLE; hsram.Init.WaitSignal = FMC_WAIT_SIGNAL_DISABLE; hsram.Init.ExtendedMode = FMC_EXTENDED_MODE_DISABLE; hsram.Init.AsynchronousWait = FMC_ASYNCHRONOUS_WAIT_DISABLE; hsram.Init.WriteBurst = FMC_WRITE_BURST_DISABLE; HAL_SRAM_DeInit(&hsram); /* Initialize the SRAM controller */ if(HAL_SRAM_Init(&hsram, &SRAM_Timing, &SRAM_Timing) != HAL_OK) { /* Initialization Error */ Error_Handler(); } /*##-2- SRAM memory read/write access ######################################*/ /* Fill the buffer to write */ Fill_Buffer(aTxBuffer, BUFFER_SIZE, 0xC20FC210); /* Write data to the SRAM memory */ for(uwIndex = 0; uwIndex < BUFFER_SIZE; uwIndex++) { *(__IO uint32_t *)(SRAM_BANK_ADDR + WRITE_READ_ADDR + 4 * uwIndex) = aTxBuffer[uwIndex]; } /* Read back data from the SRAM memory */ for(uwIndex = 0; uwIndex < BUFFER_SIZE; uwIndex++) { aRxBuffer[uwIndex] = *(__IO uint32_t *)(SRAM_BANK_ADDR + WRITE_READ_ADDR + 4 * uwIndex); } /*##-3- Checking data integrity ############################################*/ uwWriteReadStatus = Buffercmp(aTxBuffer, aRxBuffer, BUFFER_SIZE); if(uwWriteReadStatus != PASSED) { /* KO */ /* Turn on LED3 */ BSP_LED_On(LED3); } else { /* OK */ /* Turn on LED1 */ BSP_LED_On(LED1); } /* Infinite loop */ while (1) { } } /** * @brief System Clock Configuration * The system Clock is configured as follow : * System Clock source = PLL (HSE) * SYSCLK(Hz) = 180000000 * HCLK(Hz) = 180000000 * AHB Prescaler = 1 * APB1 Prescaler = 4 * APB2 Prescaler = 2 * HSE Frequency(Hz) = 25000000 * PLL_M = 25 * PLL_N = 360 * PLL_P = 2 * PLL_Q = 7 * PLL_R = 6 * VDD(V) = 3.3 * Main regulator output voltage = Scale1 mode * Flash Latency(WS) = 5 * @param None * @retval None */ static void SystemClock_Config(void) { RCC_ClkInitTypeDef RCC_ClkInitStruct; RCC_OscInitTypeDef RCC_OscInitStruct; HAL_StatusTypeDef ret = HAL_OK; /* Enable Power Control clock */ __HAL_RCC_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_SCALE1); /* Enable HSE Oscillator and activate PLL with HSE as source */ 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 = 25; RCC_OscInitStruct.PLL.PLLN = 360; RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2; RCC_OscInitStruct.PLL.PLLQ = 7; RCC_OscInitStruct.PLL.PLLR = 6; ret = HAL_RCC_OscConfig(&RCC_OscInitStruct); if(ret != HAL_OK) { while(1) { ; } } /* Activate the OverDrive to reach the 180 MHz Frequency */ ret = HAL_PWREx_EnableOverDrive(); if(ret != HAL_OK) { while(1) { ; } } /* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2 clocks dividers */ RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2); RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4; RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2; ret = HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_5); if(ret != HAL_OK) { while(1) { ; } } } /** * @brief This function is executed in case of error occurrence. * @param None * @retval None */ static void Error_Handler(void) { /* Turn LED3 on */ BSP_LED_On(LED3); while (1) { } } /** * @brief Fills buffer with user predefined data. * @param pBuffer: pointer on the buffer to fill * @param uwBufferLength: size of the buffer to fill * @param uwOffset: first value to fill on the buffer * @retval None */ static void Fill_Buffer(uint32_t *pBuffer, uint32_t uwBufferLength, uint32_t uwOffset) { uint32_t tmpIndex = 0; /* Put in global buffer different values */ for (tmpIndex = 0; tmpIndex < uwBufferLength; tmpIndex++) { pBuffer[tmpIndex] = tmpIndex + uwOffset; } } /** * @brief Compares two buffers. * @param pBuffer1, pBuffer2: buffers to be compared. * @param BufferLength: buffer's length * @retval PASSED: pBuffer identical to pBuffer1 * FAILED: pBuffer differs from pBuffer1 */ static TestStatus Buffercmp(uint32_t *pBuffer1, uint32_t *pBuffer2, uint16_t BufferLength) { while (BufferLength--) { if (*pBuffer1 != *pBuffer2) { return FAILED; } pBuffer1++; pBuffer2++; } return PASSED; } #ifdef USE_FULL_ASSERT /** * @brief Reports the name of the source file and the source line number * where the assert_param error has occurred. * @param file: pointer to the source file name * @param line: assert_param error line source number * @retval None */ void assert_failed(uint8_t *file, uint32_t line) { /* User can add his own implementation to report the file name and line number, ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */ /* Infinite loop */ while (1) { } } #endif /** * @} */ /** * @} */

Details