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STM32F0xx Standard Peripherals Firmware Library
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STM32F0xx_StdPeriph_Examples/I2C/I2C_EEPROM/main.c
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00001 /** 00002 ****************************************************************************** 00003 * @file I2C/I2C_EEPROM/main.c 00004 * @author MCD Application Team 00005 * @version V1.4.0 00006 * @date 24-July-2014 00007 * @brief Main program body 00008 ****************************************************************************** 00009 * @attention 00010 * 00011 * <h2><center>© COPYRIGHT 2014 STMicroelectronics</center></h2> 00012 * 00013 * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License"); 00014 * You may not use this file except in compliance with the License. 00015 * You may obtain a copy of the License at: 00016 * 00017 * http://www.st.com/software_license_agreement_liberty_v2 00018 * 00019 * Unless required by applicable law or agreed to in writing, software 00020 * distributed under the License is distributed on an "AS IS" BASIS, 00021 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 00022 * See the License for the specific language governing permissions and 00023 * limitations under the License. 00024 * 00025 ****************************************************************************** 00026 */ 00027 00028 00029 /* Includes ------------------------------------------------------------------*/ 00030 #include "main.h" 00031 00032 /** @addtogroup STM32F0xx_StdPeriph_Examples 00033 * @{ 00034 */ 00035 00036 /** @addtogroup I2C_EEPROM 00037 * @{ 00038 */ 00039 00040 /* Private typedef -----------------------------------------------------------*/ 00041 typedef enum {FAILED = 0, PASSED = !FAILED} TestStatus; 00042 00043 /* Private define ------------------------------------------------------------*/ 00044 /* Uncomment the following line to enable using LCD screen for messages display */ 00045 #define ENABLE_LCD_MSG_DISPLAY 00046 00047 #define sEE_WRITE_ADDRESS1 0x50 00048 #define sEE_READ_ADDRESS1 0x50 00049 #define BUFFER_SIZE1 (countof(Tx1Buffer)-1) 00050 #define BUFFER_SIZE2 (countof(Tx2Buffer)-1) 00051 #define sEE_WRITE_ADDRESS2 (sEE_WRITE_ADDRESS1 + BUFFER_SIZE1) 00052 #define sEE_READ_ADDRESS2 (sEE_READ_ADDRESS1 + BUFFER_SIZE1) 00053 00054 /* Private macro -------------------------------------------------------------*/ 00055 #define countof(a) (sizeof(a) / sizeof(*(a))) 00056 00057 /* Private variables ---------------------------------------------------------*/ 00058 uint8_t Tx1Buffer[] = "/* STM32F0xx I2C Firmware Library EEPROM driver example: \ 00059 This firmware provides a basic example of how to use the I2C firmware library and\ 00060 an associate I2C EEPROM driver to communicate with an I2C EEPROM device \ 00061 I2C peripheral is configured in Master transmitter during write operation and in\ 00062 Master receiver during read operation from I2C EEPROM.*/"; 00063 00064 uint8_t Tx2Buffer[] = "/* STM32F0xx I2C Firmware Library EEPROM driver example : \ 00065 I2C1 interfacing with M24LR64 EEPROM */"; 00066 00067 uint8_t Rx1Buffer[BUFFER_SIZE1], Rx2Buffer[BUFFER_SIZE2]; 00068 volatile TestStatus TransferStatus1 = FAILED, TransferStatus2 = FAILED; 00069 volatile uint16_t NumDataRead = 0; 00070 00071 /* Private function prototypes -----------------------------------------------*/ 00072 /* Private functions ---------------------------------------------------------*/ 00073 static TestStatus Buffercmp(uint8_t* pBuffer1, uint8_t* pBuffer2, uint16_t BufferLength); 00074 00075 /** 00076 * @brief Main program. 00077 * @param None 00078 * @retval None 00079 */ 00080 int main(void) 00081 { 00082 /*!< At this stage the microcontroller clock setting is already configured, 00083 this is done through SystemInit() function which is called from startup 00084 file (startup_stm32f0xx.s) before to branch to application main. 00085 To reconfigure the default setting of SystemInit() function, refer to 00086 system_stm32f0xx.c file 00087 */ 00088 00089 #ifdef ENABLE_LCD_MSG_DISPLAY 00090 /* Initialize the LCD screen for information display */ 00091 #ifdef USE_STM320518_EVAL 00092 STM320518_LCD_Init(); 00093 #else 00094 STM32072B_LCD_Init(); 00095 #endif /* USE_STM320518_EVAL */ 00096 00097 LCD_Clear(LCD_COLOR_BLUE); 00098 LCD_SetBackColor(LCD_COLOR_BLUE); 00099 LCD_SetTextColor(LCD_COLOR_WHITE); 00100 LCD_DisplayStringLine(LCD_LINE_0, "STM32F0xx FW Library"); 00101 LCD_DisplayStringLine(LCD_LINE_1, " EEPROM Example "); 00102 #endif /* ENABLE_LCD_MSG_DISPLAY */ 00103 00104 /* Initialize the I2C EEPROM driver ----------------------------------------*/ 00105 sEE_Init(); 00106 00107 /* First write in the memory followed by a read of the written data --------*/ 00108 /* Write on I2C EEPROM from sEE_WRITE_ADDRESS1 */ 00109 sEE_WriteBuffer(Tx1Buffer, sEE_WRITE_ADDRESS1, BUFFER_SIZE1); 00110 00111 /* Wait for EEPROM standby state */ 00112 sEE_WaitEepromStandbyState(); 00113 00114 /* Set the Number of data to be read */ 00115 NumDataRead = BUFFER_SIZE1; 00116 00117 /* Read from I2C EEPROM from sEE_READ_ADDRESS1 */ 00118 sEE_ReadBuffer(Rx1Buffer, sEE_READ_ADDRESS1, (uint16_t *)(&NumDataRead)); 00119 00120 #ifdef ENABLE_LCD_MSG_DISPLAY 00121 LCD_DisplayStringLine(LCD_LINE_3, " Transfer 1 Ongoing "); 00122 #endif /* ENABLE_LCD_MSG_DISPLAY */ 00123 00124 /* Check if the data written to the memory is read correctly */ 00125 TransferStatus1 = Buffercmp(Tx1Buffer, Rx1Buffer, BUFFER_SIZE1); 00126 /* TransferStatus1 = PASSED, if the transmitted and received data 00127 to/from the EEPROM are the same */ 00128 /* TransferStatus1 = FAILED, if the transmitted and received data 00129 to/from the EEPROM are different */ 00130 #ifdef ENABLE_LCD_MSG_DISPLAY 00131 if (TransferStatus1 == PASSED) 00132 { 00133 LCD_DisplayStringLine(LCD_LINE_3, " Transfer 1 PASSED "); 00134 } 00135 else 00136 { 00137 LCD_DisplayStringLine(LCD_LINE_3, " Transfer 1 FAILED "); 00138 } 00139 #endif /* ENABLE_LCD_MSG_DISPLAY */ 00140 00141 /* Second write in the memory followed by a read of the written data -------*/ 00142 /* Write on I2C EEPROM from sEE_WRITE_ADDRESS2 */ 00143 sEE_WriteBuffer(Tx2Buffer, sEE_WRITE_ADDRESS2, BUFFER_SIZE2); 00144 00145 /* Wait for EEPROM standby state */ 00146 sEE_WaitEepromStandbyState(); 00147 00148 /* Set the Number of data to be read */ 00149 NumDataRead = BUFFER_SIZE2; 00150 00151 /* Read from I2C EEPROM from sEE_READ_ADDRESS2 */ 00152 sEE_ReadBuffer(Rx2Buffer, sEE_READ_ADDRESS2, (uint16_t *)(&NumDataRead)); 00153 00154 #ifdef ENABLE_LCD_MSG_DISPLAY 00155 LCD_DisplayStringLine(LCD_LINE_5, " Transfer 2 Ongoing "); 00156 #endif /* ENABLE_LCD_MSG_DISPLAY */ 00157 00158 /* Check if the data written to the memory is read correctly */ 00159 TransferStatus2 = Buffercmp(Tx2Buffer, Rx2Buffer, BUFFER_SIZE2); 00160 /* TransferStatus2 = PASSED, if the transmitted and received data 00161 to/from the EEPROM are the same */ 00162 /* TransferStatus2 = FAILED, if the transmitted and received data 00163 to/from the EEPROM are different */ 00164 #ifdef ENABLE_LCD_MSG_DISPLAY 00165 if (TransferStatus2 == PASSED) 00166 { 00167 LCD_DisplayStringLine(LCD_LINE_5, " Transfer 2 PASSED "); 00168 } 00169 else 00170 { 00171 LCD_DisplayStringLine(LCD_LINE_5, " Transfer 2 FAILED "); 00172 } 00173 #endif /* ENABLE_LCD_MSG_DISPLAY */ 00174 00175 /* Free all used resources */ 00176 sEE_DeInit(); 00177 00178 while (1) 00179 { 00180 } 00181 } 00182 00183 #ifndef USE_DEFAULT_TIMEOUT_CALLBACK 00184 /** 00185 * @brief Example of timeout situation management. 00186 * @param None. 00187 * @retval None. 00188 */ 00189 uint32_t sEE_TIMEOUT_UserCallback(void) 00190 { 00191 /* Use application may try to recover the communication by resetting I2C 00192 peripheral (calling the function I2C_SoftwareResetCmd()) then re-start 00193 the transmission/reception from a previously stored recover point. 00194 For simplicity reasons, this example only shows a basic way for errors 00195 managements which consists of stopping all the process and requiring system 00196 reset. */ 00197 00198 #ifdef ENABLE_LCD_MSG_DISPLAY 00199 /* Display error message on screen */ 00200 LCD_Clear(LCD_COLOR_RED); 00201 LCD_DisplayStringLine(LCD_LINE_4, "Communication ERROR!"); 00202 LCD_DisplayStringLine(LCD_LINE_5, "Try again after res-"); 00203 LCD_DisplayStringLine(LCD_LINE_6, " etting the Board "); 00204 #endif /* ENABLE_LCD_MSG_DISPLAY */ 00205 00206 /* Block communication and all processes */ 00207 while (1) 00208 { 00209 } 00210 } 00211 #endif /* USE_DEFAULT_TIMEOUT_CALLBACK */ 00212 00213 /** 00214 * @brief Compares two buffers. 00215 * @param pBuffer1, pBuffer2: buffers to be compared. 00216 * @param BufferLength: buffer's length 00217 * @retval PASSED: pBuffer1 identical to pBuffer2 00218 * FAILED: pBuffer1 differs from pBuffer2 00219 */ 00220 static TestStatus Buffercmp(uint8_t* pBuffer1, uint8_t* pBuffer2, uint16_t BufferLength) 00221 { 00222 while(BufferLength--) 00223 { 00224 if(*pBuffer1 != *pBuffer2) 00225 { 00226 return FAILED; 00227 } 00228 00229 pBuffer1++; 00230 pBuffer2++; 00231 } 00232 00233 return PASSED; 00234 } 00235 00236 #ifdef USE_FULL_ASSERT 00237 00238 /** 00239 * @brief Reports the name of the source file and the source line number 00240 * where the assert_param error has occurred. 00241 * @param file: pointer to the source file name 00242 * @param line: assert_param error line source number 00243 * @retval None 00244 */ 00245 void assert_failed(uint8_t* file, uint32_t line) 00246 { 00247 /* User can add his own implementation to report the file name and line number, 00248 ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */ 00249 00250 /* Infinite loop */ 00251 while (1) 00252 { 00253 } 00254 } 00255 #endif 00256 00257 /** 00258 * @} 00259 */ 00260 00261 /** 00262 * @} 00263 */ 00264 00265 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/