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STM8S/A Standard Peripherals Firmware Library
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STM8S_StdPeriph_Examples/CAN/CAN_Networking/main.c
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00001 /** 00002 ****************************************************************************** 00003 * @file CAN_Networking\main.c 00004 * @author MCD Application Team 00005 * @version V2.2.0 00006 * @date 30-September-2014 00007 * @brief This file contains the main function for CAN networking example. 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 * @addtogroup CAN_Networking 00029 * @{ 00030 */ 00031 00032 /* Includes ------------------------------------------------------------------*/ 00033 #include "main.h" 00034 /* Private defines -----------------------------------------------------------*/ 00035 /* Private variables ---------------------------------------------------------*/ 00036 uint8_t Key_Pressed_Number = 0x00; 00037 __IO uint8_t Key_status = 0x00; 00038 /* Private function prototypes -----------------------------------------------*/ 00039 /* Private functions ---------------------------------------------------------*/ 00040 /** 00041 * @brief Main program. 00042 * @param None 00043 * @retval None 00044 */ 00045 00046 void main(void) 00047 { 00048 CAN_TxStatus_TypeDef status = CAN_TxStatus_Failed; 00049 00050 /* Transmit Parameters */ 00051 CAN_Id_TypeDef Tx_IDE = CAN_Id_Standard; 00052 CAN_RTR_TypeDef Tx_RTR = CAN_RTR_Data; 00053 uint8_t Tx_DLC = 0; 00054 uint8_t Tx_Data[8] = {0}; 00055 uint32_t Tx_Id = 0; 00056 00057 /* Clock configuration --------------------------------------*/ 00058 CLK_Config(); 00059 00060 /* GPIO Configuration ---------------------------------------*/ 00061 GPIO_Config(); 00062 00063 /* Configure LCD mounted on STM8-128 EVAL board -------------*/ 00064 LCD_Config(); 00065 00066 /* CAN configuration ----------------------------------------*/ 00067 CAN_Config(); 00068 00069 /* Enable Interrupts*/ 00070 enableInterrupts(); 00071 00072 /* Infinite loop*/ 00073 while(1) 00074 { 00075 while(Key_status != Key_NoPressed) 00076 { 00077 00078 if(Key_Pressed_Number == 0x0) 00079 { 00080 Key_Pressed_Number = 0x03; 00081 } 00082 else 00083 { 00084 Key_Pressed_Number--; 00085 } 00086 00087 /* Sender Display*/ 00088 LED_Display(Key_Pressed_Number); 00089 LCD_Display(Key_Pressed_Number); 00090 Delay(TIME); 00091 00092 /* Transmit Parameters*/ 00093 Tx_Id = 0x321; 00094 Tx_IDE = CAN_Id_Standard; 00095 Tx_RTR = CAN_RTR_Data; 00096 Tx_DLC = 1; 00097 Tx_Data[0] = Key_Pressed_Number; 00098 00099 /* Sender send Frame */ 00100 status = CAN_Transmit(Tx_Id,Tx_IDE,Tx_RTR,Tx_DLC,Tx_Data); 00101 00102 /* while key is not pressed, loop*/ 00103 Key_status= Key_NoPressed; 00104 } 00105 } 00106 } 00107 /** 00108 * @brief Configure system clock to run at 16Mhz 00109 * @param None 00110 * @retval None 00111 */ 00112 void CLK_Config(void) 00113 { 00114 /* Initialization of the clock */ 00115 /* Clock divider to HSI/1 */ 00116 CLK_HSIPrescalerConfig(CLK_PRESCALER_HSIDIV1); 00117 } 00118 00119 /** 00120 * @brief Configures the CAN mode and filter 00121 * @param None 00122 * @retval None 00123 */ 00124 void CAN_Config(void) 00125 { 00126 CAN_InitStatus_TypeDef status = CAN_InitStatus_Failed; 00127 00128 /* Filter Parameters */ 00129 CAN_FilterNumber_TypeDef CAN_FilterNumber; 00130 FunctionalState CAN_FilterActivation; 00131 CAN_FilterMode_TypeDef CAN_FilterMode; 00132 CAN_FilterScale_TypeDef CAN_FilterScale; 00133 uint8_t CAN_FilterID1; 00134 uint8_t CAN_FilterID2; 00135 uint8_t CAN_FilterID3; 00136 uint8_t CAN_FilterID4; 00137 uint8_t CAN_FilterIDMask1; 00138 uint8_t CAN_FilterIDMask2; 00139 uint8_t CAN_FilterIDMask3; 00140 uint8_t CAN_FilterIDMask4; 00141 00142 /* Init Parameters*/ 00143 CAN_MasterCtrl_TypeDef CAN_MasterCtrl; 00144 CAN_Mode_TypeDef CAN_Mode; 00145 CAN_SynJumpWidth_TypeDef CAN_SynJumpWidth; 00146 CAN_BitSeg1_TypeDef CAN_BitSeg1; 00147 CAN_BitSeg2_TypeDef CAN_BitSeg2; 00148 uint8_t CAN_Prescaler; 00149 00150 /* CAN register init */ 00151 CAN_DeInit(); 00152 00153 /* CAN init */ 00154 CAN_MasterCtrl=CAN_MasterCtrl_AllDisabled; 00155 CAN_Mode = CAN_Mode_Normal; 00156 CAN_SynJumpWidth = CAN_SynJumpWidth_1TimeQuantum; 00157 CAN_BitSeg1 = CAN_BitSeg1_8TimeQuantum; 00158 CAN_BitSeg2 = CAN_BitSeg2_7TimeQuantum; 00159 CAN_Prescaler = 1; 00160 status = CAN_Init(CAN_MasterCtrl, CAN_Mode, CAN_SynJumpWidth, CAN_BitSeg1, \ 00161 CAN_BitSeg2, CAN_Prescaler); 00162 00163 /* CAN filter init */ 00164 CAN_FilterNumber = CAN_FilterNumber_0; 00165 CAN_FilterActivation = ENABLE; 00166 CAN_FilterMode = CAN_FilterMode_IdMask; 00167 CAN_FilterScale = CAN_FilterScale_32Bit; 00168 CAN_FilterID1=0; 00169 CAN_FilterID2=0; 00170 CAN_FilterID3=0; 00171 CAN_FilterID4=0; 00172 CAN_FilterIDMask1=0; 00173 CAN_FilterIDMask2=0; 00174 CAN_FilterIDMask3=0; 00175 CAN_FilterIDMask4=0; 00176 CAN_FilterInit(CAN_FilterNumber, CAN_FilterActivation, CAN_FilterMode, 00177 CAN_FilterScale,CAN_FilterID1, CAN_FilterID2, CAN_FilterID3, 00178 CAN_FilterID4,CAN_FilterIDMask1, CAN_FilterIDMask2, 00179 CAN_FilterIDMask3, CAN_FilterIDMask4); 00180 00181 /* Enable Fifo message pending interrupt*/ 00182 /* Message reception is done by CAN_RX ISR*/ 00183 CAN_ITConfig(CAN_IT_FMP, ENABLE); 00184 } 00185 00186 /** 00187 * @brief Configure GPIO for LEDs and buttons available on the evaluation board 00188 * @param None 00189 * @retval None 00190 */ 00191 void GPIO_Config(void) 00192 { 00193 /* Initialize LEDs mounted on STM8-128 EVAL board */ 00194 STM_EVAL_LEDInit(LED1); 00195 STM_EVAL_LEDInit(LED2); 00196 STM_EVAL_LEDInit(LED3); 00197 STM_EVAL_LEDInit(LED4); 00198 00199 /* Initialize KEY push-button mounted on STM8-128 EVAL board */ 00200 STM_EVAL_PBInit(BUTTON_KEY, BUTTON_MODE_EXTI); 00201 00202 /* Switch LEDs Off */ 00203 STM_EVAL_LEDOff(LED1); 00204 STM_EVAL_LEDOff(LED2); 00205 STM_EVAL_LEDOff(LED3); 00206 STM_EVAL_LEDOff(LED4); 00207 } 00208 00209 /** 00210 * @brief Configure the LCD available on the evaluation board 00211 * @param None 00212 * @retval None 00213 */ 00214 void LCD_Config(void) 00215 { 00216 /* Init the Eval board LCD */ 00217 STM8S_EVAL_LCD_Init(); 00218 00219 /* Clear LCD */ 00220 LCD_Clear(); 00221 00222 /* Display the welcome text on LCD */ 00223 LCD_SetCursorPos(LCD_LINE1, 0); 00224 LCD_Print(" STM8S CAN "); 00225 /* Print "Press Key" on LCD line2*/ 00226 LCD_SetCursorPos(LCD_LINE2, 0); 00227 LCD_Print(" Press Key "); 00228 } 00229 00230 /** 00231 * @brief Display led status 00232 * @param Ledstatus the led to set ON, other leds are set OFF 00233 * @retval None 00234 */ 00235 void LED_Display(uint8_t Ledstatus) 00236 { 00237 /* Switch LEDs Off */ 00238 STM_EVAL_LEDOff(LED1); 00239 STM_EVAL_LEDOff(LED2); 00240 STM_EVAL_LEDOff(LED3); 00241 STM_EVAL_LEDOff(LED4); 00242 00243 /* Set the led ON depending on the value of Ledstatus*/ 00244 switch((uint8_t)Ledstatus) 00245 { 00246 case(0): STM_EVAL_LEDOn(LED4); 00247 break; 00248 00249 case(1): STM_EVAL_LEDOn(LED3); 00250 break; 00251 00252 case(2): STM_EVAL_LEDOn(LED2); 00253 break; 00254 00255 case(3): STM_EVAL_LEDOn(LED1); 00256 break; 00257 } 00258 } 00259 00260 /** 00261 * @brief Display led status and communication direction on the LCD 00262 * @param Ledstatus the led status 00263 * @retval None 00264 */ 00265 void LCD_Display(uint8_t Ledstatus) 00266 { 00267 LCD_SetCursorPos(LCD_LINE2, 0); 00268 00269 switch((uint8_t)Ledstatus) 00270 { 00271 case(0): LCD_Print("Sender LD4 ON "); 00272 break; 00273 00274 case(1): LCD_Print("Sender LD3 ON "); 00275 break; 00276 00277 case(2): LCD_Print("Sender LD2 ON "); 00278 break; 00279 00280 case(3): LCD_Print("Sender LD1 ON "); 00281 break; 00282 00283 case(4): LCD_Print("Receiver LD4 ON "); 00284 break; 00285 00286 case(5): LCD_Print("Receiver LD3 ON "); 00287 break; 00288 00289 case(6): LCD_Print("Receiver LD2 ON "); 00290 break; 00291 00292 case(7): LCD_Print("Receiver LD1 ON "); 00293 break; 00294 } 00295 } 00296 00297 /** 00298 * @brief Generates a delay time. 00299 * @param nCount the value for looping. 00300 * @retval None 00301 */ 00302 void Delay (uint16_t nCount) 00303 { 00304 /* Decrement nCount value */ 00305 for (; nCount != 0; nCount--); 00306 } 00307 00308 #ifdef USE_FULL_ASSERT 00309 /** 00310 * @brief Reports the name of the source file and the source line number 00311 * where the assert_param error has occurred. 00312 * @param file: pointer to the source file name 00313 * @param line: assert_param error line source number 00314 * @retval None 00315 */ 00316 void assert_failed(uint8_t* file, uint32_t line) 00317 { 00318 /* User can add his own implementation to report the file name and line number, 00319 ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */ 00320 00321 /* Infinite loop */ 00322 while (1) 00323 { 00324 } 00325 } 00326 #endif 00327 00328 /** 00329 * @} 00330 */ 00331 00332 00333 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/