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STM8S/A Standard Peripherals Firmware Library
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STM8S_StdPeriph_Examples/BEEP/BEEP_3SignalsGeneration/main.c
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00001 /** 00002 ****************************************************************************** 00003 * @file BEEP_3SignalsGeneration\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 BEEP 3 Signals Generation 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 /* Includes ------------------------------------------------------------------*/ 00029 #include "stm8s.h" 00030 #include "stm8s_eval.h" 00031 #include "stm8s_eval_lcd.h" 00032 00033 /** 00034 * @addtogroup BEEP_3SignalsGeneration 00035 * @{ 00036 */ 00037 00038 /* Private typedef -----------------------------------------------------------*/ 00039 00040 /* Private define ------------------------------------------------------------*/ 00041 /* Private macro -------------------------------------------------------------*/ 00042 /* Private variables ---------------------------------------------------------*/ 00043 /* Global variables ----------------------------------------------------------*/ 00044 bool ButtonPressed = FALSE; 00045 /* Private function prototypes -----------------------------------------------*/ 00046 static void CLK_Config(void); 00047 static void GPIO_Config(void); 00048 static void LCD_Config(void); 00049 void Delay (uint16_t nCount); 00050 uint32_t LSIMeasurment(void); 00051 /* Private functions ---------------------------------------------------------*/ 00052 00053 /** 00054 * @brief Main program. 00055 * @param None 00056 * @retval None 00057 */ 00058 void main(void) 00059 { 00060 uint8_t i = 0; 00061 00062 /* Clock configuration -----------------------------------------*/ 00063 CLK_Config(); 00064 00065 /* GPIO Configuration ------------------------------------------*/ 00066 GPIO_Config(); 00067 00068 /* Configure LCD mounted on STM8-128 EVAL board ----------------*/ 00069 LCD_Config(); 00070 00071 /* BEEP calibration */ 00072 BEEP_LSICalibrationConfig(LSIMeasurment()); 00073 00074 /* Enable general interrupts for Key button reading */ 00075 enableInterrupts(); 00076 00077 while (1) 00078 { 00079 /* Check button status */ 00080 if (ButtonPressed == TRUE) /* Button is pressed */ 00081 { 00082 ButtonPressed = FALSE; 00083 /* Change BEEP frequency */ 00084 switch (i) 00085 { 00086 case 0: 00087 BEEP_Cmd(DISABLE); 00088 Delay(100); 00089 BEEP_Init(BEEP_FREQUENCY_1KHZ); 00090 BEEP_Cmd(ENABLE); 00091 /* LED1 ON */ 00092 STM_EVAL_LEDOn(LED1); 00093 STM_EVAL_LEDOff(LED2); 00094 STM_EVAL_LEDOff(LED3); 00095 STM_EVAL_LEDOff(LED4); 00096 LCD_SetCursorPos(LCD_LINE1, 0); 00097 LCD_Print(" BEEPER 1kHz "); 00098 i = 1; 00099 break; 00100 case 1: 00101 BEEP_Cmd(DISABLE); 00102 Delay(100); 00103 BEEP_Init(BEEP_FREQUENCY_2KHZ); 00104 BEEP_Cmd(ENABLE); 00105 /* LED2 ON */ 00106 STM_EVAL_LEDOn(LED2); 00107 STM_EVAL_LEDOff(LED1); 00108 STM_EVAL_LEDOff(LED3); 00109 STM_EVAL_LEDOff(LED4); 00110 LCD_SetCursorPos(LCD_LINE1, 0); 00111 LCD_Print(" BEEPER 2kHz "); 00112 i = 2; 00113 break; 00114 case 2: 00115 BEEP_Cmd(DISABLE); 00116 Delay(100); 00117 BEEP_Init(BEEP_FREQUENCY_4KHZ); 00118 BEEP_Cmd(ENABLE); 00119 /* LED3 ON */ 00120 STM_EVAL_LEDOn(LED3); 00121 STM_EVAL_LEDOff(LED2); 00122 STM_EVAL_LEDOff(LED1); 00123 STM_EVAL_LEDOff(LED4); 00124 LCD_SetCursorPos(LCD_LINE1, 0); 00125 LCD_Print(" BEEPER 4kHz "); 00126 i = 3; 00127 break; 00128 case 3: 00129 BEEP_Cmd(DISABLE); 00130 /* LED4 ON */ 00131 STM_EVAL_LEDOn(LED4); 00132 STM_EVAL_LEDOff(LED2); 00133 STM_EVAL_LEDOff(LED3); 00134 STM_EVAL_LEDOff(LED1); 00135 LCD_SetCursorPos(LCD_LINE1, 0); 00136 LCD_Print(" BEEPER OFF "); 00137 i = 0; 00138 break; 00139 default: 00140 break; 00141 } 00142 } 00143 00144 } 00145 00146 } 00147 00148 /** 00149 * @brief Configure system clock to run at 16Mhz 00150 * @param None 00151 * @retval None 00152 */ 00153 static void CLK_Config(void) 00154 { 00155 /* Initialization of the clock */ 00156 /* Clock divider to HSI/1 */ 00157 CLK_HSIPrescalerConfig(CLK_PRESCALER_HSIDIV1); 00158 } 00159 00160 /** 00161 * @brief Configure GPIO for LEDs and buttons available on the evaluation board 00162 * @param None 00163 * @retval None 00164 */ 00165 static void GPIO_Config(void) 00166 { 00167 /* Initialize LEDs mounted on STM8-128 EVAL board */ 00168 STM_EVAL_LEDInit(LED1); 00169 STM_EVAL_LEDInit(LED2); 00170 STM_EVAL_LEDInit(LED3); 00171 STM_EVAL_LEDInit(LED4); 00172 00173 /* Initialize KEY pushbutton mounted on STM8-128 EVAL board */ 00174 STM_EVAL_PBInit(BUTTON_KEY, BUTTON_MODE_EXTI); 00175 00176 /* Switch LEDs On */ 00177 STM_EVAL_LEDOn(LED1); 00178 STM_EVAL_LEDOn(LED2); 00179 STM_EVAL_LEDOn(LED3); 00180 STM_EVAL_LEDOn(LED4); 00181 } 00182 00183 /** 00184 * @brief Configure the LCD available on the evaluation board 00185 * @param None 00186 * @retval None 00187 */ 00188 static void LCD_Config(void) 00189 { 00190 /* Init the Eval board LCD */ 00191 STM8S_EVAL_LCD_Init(); 00192 00193 /* Clear LCD */ 00194 LCD_Clear(); 00195 00196 /* Print " BEEPER OFF " on LCD line1*/ 00197 LCD_SetCursorPos(LCD_LINE1, 0); 00198 LCD_Print(" BEEPER OFF "); 00199 /* Print "Press Key" on LCD line2*/ 00200 LCD_SetCursorPos(LCD_LINE2, 0); 00201 LCD_Print(" Press Key "); 00202 } 00203 00204 /** 00205 * @brief Measure the LSI frequency using timer IC1 and update the calibration registers. 00206 * @note It is recommended to use a timer clock frequency of at least 10MHz in order 00207 * to obtain a better in the LSI frequency measurement. 00208 * @param None 00209 * @retval None 00210 */ 00211 uint32_t LSIMeasurment(void) 00212 { 00213 00214 uint32_t lsi_freq_hz = 0x0; 00215 uint32_t fmaster = 0x0; 00216 uint16_t ICValue1 = 0x0; 00217 uint16_t ICValue2 = 0x0; 00218 00219 /* Get master frequency */ 00220 fmaster = CLK_GetClockFreq(); 00221 00222 /* Enable the LSI measurement: LSI clock connected to timer Input Capture 1 */ 00223 AWU->CSR |= AWU_CSR_MSR; 00224 00225 #if defined (STM8S903) || defined (STM8S103) || defined (STM8S003) 00226 /* Measure the LSI frequency with TIMER Input Capture 1 */ 00227 00228 /* Capture only every 8 events!!! */ 00229 /* Enable capture of TI1 */ 00230 TIM1_ICInit(TIM1_CHANNEL_1, TIM1_ICPOLARITY_RISING, TIM1_ICSELECTION_DIRECTTI, TIM1_ICPSC_DIV8, 0); 00231 00232 /* Enable TIM1 */ 00233 TIM1_Cmd(ENABLE); 00234 00235 /* wait a capture on cc1 */ 00236 while((TIM1->SR1 & TIM1_FLAG_CC1) != TIM1_FLAG_CC1); 00237 /* Get CCR1 value*/ 00238 ICValue1 = TIM1_GetCapture1(); 00239 TIM1_ClearFlag(TIM1_FLAG_CC1); 00240 00241 /* wait a capture on cc1 */ 00242 while((TIM1->SR1 & TIM1_FLAG_CC1) != TIM1_FLAG_CC1); 00243 /* Get CCR1 value*/ 00244 ICValue2 = TIM1_GetCapture1(); 00245 TIM1_ClearFlag(TIM1_FLAG_CC1); 00246 00247 /* Disable IC1 input capture */ 00248 TIM1->CCER1 &= (uint8_t)(~TIM1_CCER1_CC1E); 00249 /* Disable timer2 */ 00250 TIM1_Cmd(DISABLE); 00251 00252 #else 00253 /* Measure the LSI frequency with TIMER Input Capture 1 */ 00254 00255 /* Capture only every 8 events!!! */ 00256 /* Enable capture of TI1 */ 00257 TIM3_ICInit(TIM3_CHANNEL_1, TIM3_ICPOLARITY_RISING, TIM3_ICSELECTION_DIRECTTI, TIM3_ICPSC_DIV8, 0); 00258 00259 /* Enable TIM3 */ 00260 TIM3_Cmd(ENABLE); 00261 00262 /* wait a capture on cc1 */ 00263 while ((TIM3->SR1 & TIM3_FLAG_CC1) != TIM3_FLAG_CC1); 00264 /* Get CCR1 value*/ 00265 ICValue1 = TIM3_GetCapture1(); 00266 TIM3_ClearFlag(TIM3_FLAG_CC1); 00267 00268 /* wait a capture on cc1 */ 00269 while ((TIM3->SR1 & TIM3_FLAG_CC1) != TIM3_FLAG_CC1); 00270 /* Get CCR1 value*/ 00271 ICValue2 = TIM3_GetCapture1(); 00272 TIM3_ClearFlag(TIM3_FLAG_CC1); 00273 00274 /* Disable IC1 input capture */ 00275 TIM3->CCER1 &= (uint8_t)(~TIM3_CCER1_CC1E); 00276 /* Disable timer3 */ 00277 TIM3_Cmd(DISABLE); 00278 #endif 00279 00280 /* Compute LSI clock frequency */ 00281 lsi_freq_hz = (8 * fmaster) / (ICValue2 - ICValue1); 00282 00283 /* Disable the LSI measurement: LSI clock disconnected from timer Input Capture 1 */ 00284 AWU->CSR &= (uint8_t)(~AWU_CSR_MSR); 00285 00286 return (lsi_freq_hz); 00287 } 00288 00289 /** 00290 * @brief Delay. 00291 * @param nCount 00292 * @retval None 00293 */ 00294 void Delay(uint16_t nCount) 00295 { 00296 /* Decrement nCount value */ 00297 while (nCount != 0) 00298 { 00299 nCount--; 00300 } 00301 } 00302 00303 #ifdef USE_FULL_ASSERT 00304 00305 /** 00306 * @brief Reports the name of the source file and the source line number 00307 * where the assert_param error has occurred. 00308 * @param file: pointer to the source file name 00309 * @param line: assert_param error line source number 00310 * @retval None 00311 */ 00312 void assert_failed(uint8_t* file, uint32_t line) 00313 { 00314 /* User can add his own implementation to report the file name and line number, 00315 ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */ 00316 00317 /* Infinite loop */ 00318 while (1) 00319 { 00320 } 00321 } 00322 #endif 00323 00324 /** 00325 * @} 00326 */ 00327 00328 00329 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/