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STM32F0xx Standard Peripherals Firmware Library
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STM32F0xx_StdPeriph_Examples/I2C/I2C_TwoBoards/main.c
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00001 /** 00002 ****************************************************************************** 00003 * @file I2C/I2C_TwoBoards/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_TwoBoards 00037 * @{ 00038 */ 00039 00040 /* Private typedef -----------------------------------------------------------*/ 00041 typedef enum {FAILED = 0, PASSED = !FAILED} TestStatus; 00042 /* Private define ------------------------------------------------------------*/ 00043 00044 /* Private macro -------------------------------------------------------------*/ 00045 /* Private variables ---------------------------------------------------------*/ 00046 00047 /* CPAL local transfer structures */ 00048 CPAL_TransferTypeDef sRxStructure, sTxStructure; 00049 00050 /* Buffers tables declarations */ 00051 const uint8_t tStateSignal[] = "STM32 CPAL 2xBoards Example: Signal State "; 00052 const uint8_t tSignal1[] = "STM32 CPAL 2xBoards Example: Signal Signal1"; 00053 const uint8_t tSignal2[] = "STM32 CPAL 2xBoards Example: Signal Signal2"; 00054 00055 uint8_t tRxBuffer[MAX_BUFF_SIZE]; 00056 uint32_t BufferSize = BUFFER_SIZE; 00057 uint8_t Color = 0; 00058 __IO uint32_t ActionState = ACTION_NONE; 00059 __IO uint32_t RecieverMode = 0; 00060 __IO uint32_t TransmitMode = 0; 00061 uint32_t PeriodicValue = 15000, Divider = 1; 00062 00063 /* Private function prototypes -----------------------------------------------*/ 00064 00065 /* Private functions ---------------------------------------------------------*/ 00066 static void TIM6_Config(void); 00067 static void TIM17_Config(uint32_t Period); 00068 uint8_t Buffer_Check(uint8_t* pBuffer, uint8_t* pBuffer1, uint8_t* pBuffer2, uint8_t* pBuffer3, uint16_t BufferLength); 00069 TestStatus Buffer_Compare(uint8_t* pBuffer1, uint8_t* pBuffer2, uint16_t BufferLength); 00070 void Switch_Color(void); 00071 void Switch_ErrorColor(void); 00072 00073 00074 /** 00075 * @brief Main program. 00076 * @param None 00077 * @retval None 00078 */ 00079 int main(void) 00080 { 00081 /*!< At this stage the microcontroller clock setting is already configured, 00082 this is done through SystemInit() function which is called from startup 00083 file (startup_stm32f0xx.s) before to branch to application main. 00084 To reconfigure the default setting of SystemInit() function, refer to 00085 system_stm32f0xx.c file 00086 */ 00087 00088 /* Initialize LEDs and LCD available on STM320518-EVAL board ****************/ 00089 STM_EVAL_LEDInit(LED1); 00090 STM_EVAL_LEDInit(LED2); 00091 STM_EVAL_LEDInit(LED3); 00092 STM_EVAL_LEDInit(LED4); 00093 00094 /* Initialize TIM6 */ 00095 TIM6_Config(); 00096 00097 /* Initialize the LCD */ 00098 #ifdef USE_STM320518_EVAL 00099 STM320518_LCD_Init(); 00100 #else 00101 STM32072B_LCD_Init(); 00102 #endif /* USE_STM320518_EVAL */ 00103 00104 /* Display message on LCD **************************************************/ 00105 /* Clear the LCD */ 00106 LCD_Clear(White); 00107 /* Set the LCD Back Color */ 00108 LCD_SetBackColor(Blue); 00109 /* Set the LCD Text Color */ 00110 LCD_SetTextColor(Yellow); 00111 LCD_DisplayStringLine(Line0, MESSAGE1); 00112 LCD_DisplayStringLine(Line1, MESSAGE2); 00113 LCD_DisplayStringLine(Line3, MESSAGE3); 00114 00115 /* Set the LCD Back Color */ 00116 LCD_SetBackColor(White); 00117 /* Set the LCD Text Color */ 00118 LCD_SetTextColor(Blue); 00119 00120 /* Configure the Push buttons in interrupt mode *****************************/ 00121 STM_EVAL_PBInit(BUTTON_SEL, Mode_EXTI); 00122 STM_EVAL_PBInit(BUTTON_TAMPER, Mode_EXTI); 00123 00124 /* Start CPAL communication configuration ***********************************/ 00125 /* Initialize local Reception structures */ 00126 sRxStructure.wNumData = BufferSize; /* Maximum Number of data to be received */ 00127 sRxStructure.pbBuffer = tRxBuffer; /* Common Rx buffer for all received data */ 00128 sRxStructure.wAddr1 = 0; /* Not needed */ 00129 sRxStructure.wAddr2 = 0; /* Not needed */ 00130 00131 /* Initialize local Transmission structures */ 00132 sTxStructure.wNumData = BufferSize; /* Maximum Number of data to be received */ 00133 sTxStructure.pbBuffer = (uint8_t*)tStateSignal; /* Common Rx buffer for all received data */ 00134 sTxStructure.wAddr1 = OWN_ADDRESS; /* The own board address */ 00135 sTxStructure.wAddr2 = 0; /* Not needed */ 00136 00137 /* Set SYSCLK as I2C clock source */ 00138 RCC_I2CCLKConfig(RCC_I2C1CLK_SYSCLK); 00139 00140 /* Configure the device structure */ 00141 CPAL_I2C_StructInit(&I2C_DevStructure); /* Set all fields to default values */ 00142 I2C_DevStructure.CPAL_Mode = CPAL_MODE_SLAVE; 00143 #ifdef CPAL_I2C_DMA_PROGMODEL 00144 I2C_DevStructure.wCPAL_Options = CPAL_OPT_NO_MEM_ADDR | CPAL_OPT_DMATX_TCIT | CPAL_OPT_DMARX_TCIT; 00145 I2C_DevStructure.CPAL_ProgModel = CPAL_PROGMODEL_DMA; 00146 #elif defined (CPAL_I2C_IT_PROGMODEL) 00147 I2C_DevStructure.wCPAL_Options = CPAL_OPT_NO_MEM_ADDR; 00148 I2C_DevStructure.CPAL_ProgModel = CPAL_PROGMODEL_INTERRUPT; 00149 #else 00150 #error "Please select one of the programming model (in stm32f0xx_i2c_cpal_conf.h)" 00151 #endif 00152 I2C_DevStructure.pCPAL_I2C_Struct->I2C_Timing = I2C_TIMING; 00153 I2C_DevStructure.pCPAL_I2C_Struct->I2C_OwnAddress1 = OWN_ADDRESS; 00154 I2C_DevStructure.pCPAL_TransferRx = &sRxStructure; 00155 I2C_DevStructure.pCPAL_TransferTx = &sTxStructure; 00156 00157 /* Initialize CPAL device with the selected parameters */ 00158 CPAL_I2C_Init(&I2C_DevStructure); 00159 00160 /* Infinite loop */ 00161 while (1) 00162 { 00163 /* Write operations ------------------------------------------------------*/ 00164 /* Check if any action has been triggered by push buttons */ 00165 if ((ActionState != ACTION_PENDING) && (ActionState != ACTION_NONE)) 00166 { 00167 /* Check if the current CPAL device state allows write operation */ 00168 if ((I2C_DevStructure.CPAL_State == CPAL_STATE_READY) || \ 00169 (I2C_DevStructure.CPAL_State == CPAL_STATE_BUSY_RX) ||\ 00170 (I2C_DevStructure.CPAL_State == CPAL_STATE_DISABLED)) 00171 { 00172 /* Initialize local Transmission structures */ 00173 sTxStructure.wNumData = BufferSize; /* Maximum Number of data to be received */ 00174 sTxStructure.wAddr1 = OWN_ADDRESS; /* The own board address */ 00175 sTxStructure.wAddr2 = 0; /* Not needed */ 00176 00177 switch (ActionState) 00178 { 00179 00180 case BUTTON_SEL: 00181 sTxStructure.pbBuffer = (uint8_t*)tSignal1; 00182 Divider = 1; 00183 break; 00184 00185 case BUTTON_TAMPER: 00186 sTxStructure.pbBuffer = (uint8_t*)tSignal2; 00187 Divider = 2; 00188 break; 00189 00190 case ACTION_PERIODIC: 00191 sTxStructure.pbBuffer = (uint8_t*)tStateSignal; 00192 break; 00193 00194 default: 00195 sTxStructure.pbBuffer = (uint8_t*)tSignal1; 00196 break; 00197 } 00198 00199 /* Configure the device mode to master */ 00200 I2C_DevStructure.CPAL_Mode = CPAL_MODE_MASTER; 00201 /* Force the CPAL state to ready (in case a read operation has been initiated) */ 00202 I2C_DevStructure.CPAL_State = CPAL_STATE_READY; 00203 00204 /* Prevent other actions to be performed while the current is not finished */ 00205 ActionState = ACTION_PENDING; 00206 TransmitMode = STATE_ON; 00207 00208 /* Configure a Timer to generate periodic interrupt: used to send state signal */ 00209 TIM17_Config(PeriodicValue/Divider); 00210 00211 /* Start writing data in master mode */ 00212 if (CPAL_I2C_Write(&I2C_DevStructure) == CPAL_PASS) 00213 { 00214 } 00215 } 00216 } 00217 00218 00219 /* Read Operations -------------------------------------------------------*/ 00220 if (((I2C_DevStructure.CPAL_State == CPAL_STATE_READY) || \ 00221 (I2C_DevStructure.CPAL_State == CPAL_STATE_DISABLED)) && \ 00222 (TransmitMode == STATE_OFF)) 00223 { 00224 /* Initialize local Reception structures */ 00225 sRxStructure.wNumData = BufferSize; /* Maximum Number of data to be received */ 00226 sRxStructure.pbBuffer = tRxBuffer; /* Common Rx buffer for all received data */ 00227 00228 /* Reconfigure device for slave receiver mode */ 00229 I2C_DevStructure.CPAL_Mode = CPAL_MODE_SLAVE; 00230 I2C_DevStructure.CPAL_State = CPAL_STATE_READY; 00231 00232 /* Start waiting for data to be received in slave mode */ 00233 if (CPAL_I2C_Read(&I2C_DevStructure) == CPAL_PASS) 00234 { 00235 LCD_DisplayStringLine(Line9, MEASSAGE_EMPTY); 00236 } 00237 } 00238 } 00239 } 00240 /** 00241 * @brief Configures TIM6 and associated resources to generate an update interrupt each 50 ms. 00242 * @param None 00243 * @retval None 00244 */ 00245 static void TIM6_Config(void) 00246 { 00247 /* TIM6 is used to toggle Led1 and Led4 each 50ms */ 00248 00249 NVIC_InitTypeDef NVIC_InitStructure; 00250 TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; 00251 00252 /* TIMER clock enable */ 00253 RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM6 , ENABLE); 00254 00255 /* Enable the TIMER global Interrupt */ 00256 NVIC_InitStructure.NVIC_IRQChannel = TIM6_DAC_IRQn; 00257 NVIC_InitStructure.NVIC_IRQChannelPriority = 0; 00258 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; 00259 NVIC_Init(&NVIC_InitStructure); 00260 00261 TIM_TimeBaseStructure.TIM_Period = 50000; 00262 TIM_TimeBaseStructure.TIM_Prescaler = (SystemCoreClock/1000000)-1; 00263 TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; 00264 TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; 00265 TIM_TimeBaseInit(TIM6, &TIM_TimeBaseStructure); 00266 00267 /* TIM IT enable */ 00268 TIM_ITConfig(TIM6, TIM_IT_Update , ENABLE); 00269 00270 /* TIM17 enable counter */ 00271 TIM_Cmd(TIM6, ENABLE); 00272 } 00273 00274 /** 00275 * @brief Configures TIM17 and associated resources to generate an update interrupt. 00276 * The period of Timer is depending on Period value. 00277 * @param Period : affected to Timer Period 00278 * @retval None 00279 */ 00280 static void TIM17_Config(uint32_t Period) 00281 { 00282 /* TIM17 is used to generate periodic interrupts. At each interrupt 00283 if Transmitter mode is selected, a status message is sent to other Board */ 00284 00285 NVIC_InitTypeDef NVIC_InitStructure; 00286 TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; 00287 00288 /* TIMER clock enable */ 00289 RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM17 , ENABLE); 00290 00291 NVIC_InitStructure.NVIC_IRQChannel = TIM17_IRQn; 00292 NVIC_InitStructure.NVIC_IRQChannelPriority = 0x01; 00293 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; 00294 NVIC_Init(&NVIC_InitStructure); 00295 00296 TIM_TimeBaseStructure.TIM_Period = Period; 00297 TIM_TimeBaseStructure.TIM_Prescaler = (SystemCoreClock/10000)-1; 00298 TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; 00299 TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; 00300 TIM_TimeBaseInit(TIM17, &TIM_TimeBaseStructure); 00301 00302 /* TIM IT enable */ 00303 TIM_ITConfig(TIM17, TIM_IT_Update , ENABLE); 00304 00305 /* TIM17 enable counter */ 00306 TIM_Cmd(TIM17, ENABLE); 00307 } 00308 /** 00309 * @brief Compares two buffers. 00310 * @param pBuffer1, pBuffer2: buffers to be compared. 00311 * @param BufferLength: buffer's length 00312 * @retval PASSED: pBuffer1 identical to pBuffer2 00313 * FAILED: pBuffer1 differs from pBuffer2 00314 */ 00315 TestStatus Buffer_Compare(uint8_t* pBuffer1, uint8_t* pBuffer2, uint16_t BufferLength) 00316 { 00317 while(BufferLength--) 00318 { 00319 if(*pBuffer1 != *pBuffer2) 00320 { 00321 return FAILED; 00322 } 00323 00324 pBuffer1++; 00325 pBuffer2++; 00326 } 00327 00328 return PASSED; 00329 } 00330 00331 /** 00332 * @brief Compares a buffer to a list of buffers. 00333 * @param pBuffer, pBuffer1: buffers to be compared. 00334 * @param BufferLength: buffer's length 00335 * @retval PASSED: pBuffer identical to pBuffer1 00336 * FAILED: pBuffer differs from pBuffer1 00337 */ 00338 00339 uint8_t Buffer_Check(uint8_t* pBuffer, uint8_t* pBuffer1, uint8_t* pBuffer2, uint8_t* pBuffer3, uint16_t BufferLength) 00340 { 00341 if (Buffer_Compare(pBuffer, pBuffer1, BufferLength) == PASSED) 00342 { 00343 return 0; 00344 } 00345 else if (Buffer_Compare(pBuffer, pBuffer2, BufferLength) == PASSED) 00346 { 00347 return 1; 00348 } 00349 else if (Buffer_Compare(pBuffer, pBuffer3, BufferLength) == PASSED) 00350 { 00351 return 2; 00352 } 00353 else 00354 { 00355 return 0xFF; /* Non identified buffer */ 00356 } 00357 } 00358 00359 /** 00360 * @brief Swap the color of the line on LCD. 00361 * @param None. 00362 * @retval None. 00363 */ 00364 void Switch_Color(void) 00365 { 00366 /* Set the message color */ 00367 if(Color == 0) 00368 { 00369 LCD_SetTextColor(Black); 00370 Color=1; 00371 } 00372 else 00373 { 00374 LCD_SetTextColor(Blue2); 00375 Color=0; 00376 } 00377 } 00378 00379 /** 00380 * @brief Swap the color of the line on LCD. 00381 * @param None. 00382 * @retval None. 00383 */ 00384 void Switch_ErrorColor(void) 00385 { 00386 /* Set the message color */ 00387 if(Color == 0) 00388 { 00389 LCD_SetTextColor(Magenta); 00390 Color=1; 00391 } 00392 else 00393 { 00394 LCD_SetTextColor(Red); 00395 Color=0; 00396 } 00397 } 00398 00399 #ifdef USE_FULL_ASSERT 00400 00401 /** 00402 * @brief Reports the name of the source file and the source line number 00403 * where the assert_param error has occurred. 00404 * @param file: pointer to the source file name 00405 * @param line: assert_param error line source number 00406 * @retval None 00407 */ 00408 void assert_failed(uint8_t* file, uint32_t line) 00409 { 00410 /* User can add his own implementation to report the file name and line number, 00411 ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */ 00412 00413 00414 /* Infinite loop */ 00415 while (1) 00416 { 00417 } 00418 } 00419 #endif 00420 00421 /** 00422 * @} 00423 */ 00424 00425 /** 00426 * @} 00427 */ 00428 00429 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/