Src/main.c (FMC_SDRAM)

Outline

Includes

#include "main.h"

Private define

#define BUFFER_SIZE

#define WRITE_READ_ADDR

Private variables

hsdram

SDRAM_Timing

command

aTxBuffer

aRxBuffer

uwWriteReadStatus

uwIndex

Private function prototypes

main()

SystemClock_Config()

Error_Handler()

SDRAM_Initialization_Sequence(SDRAM_HandleTypeDef *, FMC_SDRAM_CommandTypeDef *)

Fill_Buffer(uint32_t *, uint32_t, uint32_t)

Files

SourceVuSTM32 Libraries and SamplesFMC_SDRAMSrc/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

316

317

318

319

320

321

322

323

324

325

326

327

328

329

330

331

332

333

334

335

336

337

338

339

340

341

342

343

344

345

346

347

348

349

350

351

352

353

354

355

356

357

358

/** ****************************************************************************** * @file FMC/FMC_SDRAM/Src/main.c * @author MCD Application Team * @brief This example describes how to configure and use GPIOs through * the STM32F4xx HAL API. ****************************************************************************** * @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_SDRAM * @{ */ /* Private typedef -----------------------------------------------------------*/ /* Private define ------------------------------------------------------------*/ #define BUFFER_SIZE ((uint32_t)0x0100) #define WRITE_READ_ADDR ((uint32_t)0x0800) /* Private macro -------------------------------------------------------------*/ /* Private variables ---------------------------------------------------------*/ SDRAM_HandleTypeDef hsdram; FMC_SDRAM_TimingTypeDef SDRAM_Timing; FMC_SDRAM_CommandTypeDef command; /* 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 SDRAM_Initialization_Sequence(SDRAM_HandleTypeDef *hsdram, FMC_SDRAM_CommandTypeDef *Command); static void Fill_Buffer(uint32_t *pBuffer, uint32_t uwBufferLenght, uint32_t uwOffset); /* 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 SDRAM device #########################################*/ /* SDRAM device configuration */ hsdram.Instance = FMC_SDRAM_DEVICE; SDRAM_Timing.LoadToActiveDelay = 2; SDRAM_Timing.ExitSelfRefreshDelay = 6; SDRAM_Timing.SelfRefreshTime = 4; SDRAM_Timing.RowCycleDelay = 6; SDRAM_Timing.WriteRecoveryTime = 2; SDRAM_Timing.RPDelay = 2; SDRAM_Timing.RCDDelay = 2; hsdram.Init.SDBank = FMC_SDRAM_BANK1; hsdram.Init.ColumnBitsNumber = FMC_SDRAM_COLUMN_BITS_NUM_8; hsdram.Init.RowBitsNumber = FMC_SDRAM_ROW_BITS_NUM_12; hsdram.Init.MemoryDataWidth = SDRAM_MEMORY_WIDTH; hsdram.Init.InternalBankNumber = FMC_SDRAM_INTERN_BANKS_NUM_4; hsdram.Init.CASLatency = FMC_SDRAM_CAS_LATENCY_2; hsdram.Init.WriteProtection = FMC_SDRAM_WRITE_PROTECTION_DISABLE; hsdram.Init.SDClockPeriod = SDCLOCK_PERIOD; hsdram.Init.ReadBurst = FMC_SDRAM_RBURST_ENABLE; hsdram.Init.ReadPipeDelay = FMC_SDRAM_RPIPE_DELAY_0; /* Initialize the SDRAM controller */ if(HAL_SDRAM_Init(&hsdram, &SDRAM_Timing) != HAL_OK) { /* Initialization Error */ Error_Handler(); } /* Program the SDRAM external device */ SDRAM_Initialization_Sequence(&hsdram, &command); /*##-2- SDRAM memory read/write access #####################################*/ /* Fill the buffer to write */ Fill_Buffer(aTxBuffer, BUFFER_SIZE, 0xA244250F); /* Write data to the SDRAM memory */ for (uwIndex = 0; uwIndex < BUFFER_SIZE; uwIndex++) { *(__IO uint32_t*) (SDRAM_BANK_ADDR + WRITE_READ_ADDR + 4*uwIndex) = aTxBuffer[uwIndex]; } /* Read back data from the SDRAM memory */ for (uwIndex = 0; uwIndex < BUFFER_SIZE; uwIndex++) { aRxBuffer[uwIndex] = *(__IO uint32_t*) (SDRAM_BANK_ADDR + WRITE_READ_ADDR + 4*uwIndex); } /*##-3- Checking data integrity ############################################*/ for (uwIndex = 0; (uwIndex < BUFFER_SIZE) && (uwWriteReadStatus == 0); uwIndex++) { if (aRxBuffer[uwIndex] != aTxBuffer[uwIndex]) { uwWriteReadStatus++; } } 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) = 8000000 * PLL_M = 8 * PLL_N = 360 * PLL_P = 2 * PLL_Q = 7 * PLL_R = 2 * 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 = 8; RCC_OscInitStruct.PLL.PLLN = 360; RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2; RCC_OscInitStruct.PLL.PLLQ = 7; RCC_OscInitStruct.PLL.PLLR = 2; 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) { /* User may add here some code to deal with this error */ /* Turn LED3 on */ BSP_LED_On(LED3); while(1) { } } /** * @brief Perform the SDRAM exernal memory inialization sequence * @param hsdram: SDRAM handle * @param Command: Pointer to SDRAM command structure * @retval None */ static void SDRAM_Initialization_Sequence(SDRAM_HandleTypeDef *hsdram, FMC_SDRAM_CommandTypeDef *Command) { __IO uint32_t tmpmrd =0; /* Step 3: Configure a clock configuration enable command */ Command->CommandMode = FMC_SDRAM_CMD_CLK_ENABLE; Command->CommandTarget = FMC_SDRAM_CMD_TARGET_BANK1; Command->AutoRefreshNumber = 1; Command->ModeRegisterDefinition = 0; /* Send the command */ HAL_SDRAM_SendCommand(hsdram, Command, SDRAM_TIMEOUT); /* Step 4: Insert 100 us minimum delay */ /* Inserted delay is equal to 1 ms due to systick time base unit (ms) */ HAL_Delay(1); /* Step 5: Configure a PALL (precharge all) command */ Command->CommandMode = FMC_SDRAM_CMD_PALL; Command->CommandTarget = FMC_SDRAM_CMD_TARGET_BANK1; Command->AutoRefreshNumber = 1; Command->ModeRegisterDefinition = 0; /* Send the command */ HAL_SDRAM_SendCommand(hsdram, Command, SDRAM_TIMEOUT); /* Step 6 : Configure a Auto-Refresh command */ Command->CommandMode = FMC_SDRAM_CMD_AUTOREFRESH_MODE; Command->CommandTarget = FMC_SDRAM_CMD_TARGET_BANK1; Command->AutoRefreshNumber = 8; Command->ModeRegisterDefinition = 0; /* Send the command */ HAL_SDRAM_SendCommand(hsdram, Command, SDRAM_TIMEOUT); /* Step 7: Program the external memory mode register */ tmpmrd = (uint32_t)SDRAM_MODEREG_BURST_LENGTH_1 | SDRAM_MODEREG_BURST_TYPE_SEQUENTIAL | SDRAM_MODEREG_CAS_LATENCY_2 | SDRAM_MODEREG_OPERATING_MODE_STANDARD | SDRAM_MODEREG_WRITEBURST_MODE_SINGLE; Command->CommandMode = FMC_SDRAM_CMD_LOAD_MODE; Command->CommandTarget = FMC_SDRAM_CMD_TARGET_BANK1; Command->AutoRefreshNumber = 1; Command->ModeRegisterDefinition = tmpmrd; /* Send the command */ HAL_SDRAM_SendCommand(hsdram, Command, SDRAM_TIMEOUT); /* Step 8: Set the refresh rate counter */ /* (15.62 us x Freq) - 20 */ /* Set the device refresh counter */ hsdram->Instance->SDRTR |= ((uint32_t)((1292)<< 1)); } /** * @brief Fills buffer with user predefined data. * @param pBuffer: pointer on the buffer to fill * @param uwBufferLenght: 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 uwBufferLenght, uint32_t uwOffset) { uint32_t tmpIndex = 0; /* Put in global buffer different values */ for (tmpIndex = 0; tmpIndex < uwBufferLenght; tmpIndex++ ) { pBuffer[tmpIndex] = tmpIndex + uwOffset; } } #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