board.c 14 KB

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  1. #include "board.h"
  2. #include "stm32g0xx_ll_rcc.h"
  3. #include "stm32g0xx_ll_bus.h"
  4. #include "stm32g0xx_ll_gpio.h"
  5. #include "stm32g0xx_ll_usart.h"
  6. /* private variables */
  7. /* private functions */
  8. static void GPIO_Init(void);
  9. static void DMA_Init(void);
  10. static void TIM1_Init(void);
  11. static void TIM3_Init(void);
  12. static void TIM14_Init(void);
  13. static void TIM16_Init(void);
  14. static void TIM17_Init(void);
  15. static void USART1_UART_Init(void);
  16. /* Board perephireal Configuration */
  17. void Board_Init(void)
  18. {
  19. RCC->APBENR2 |= RCC_APBENR2_SYSCFGEN;
  20. RCC->APBENR1 |= RCC_APBENR1_PWREN;
  21. /* Peripheral interrupt init*/
  22. /* RCC_IRQn interrupt configuration */
  23. NVIC_SetPriority(RCC_IRQn, 0);
  24. NVIC_EnableIRQ(RCC_IRQn);
  25. /* Configure the system clock */
  26. SystemClock_Config();
  27. /* Processor uses sleep as its low power mode */
  28. SCB->SCR &= ~((uint32_t)SCB_SCR_SLEEPDEEP_Msk);
  29. /* DisableSleepOnExit */
  30. SCB->SCR &= ~((uint32_t)SCB_SCR_SLEEPONEXIT_Msk);
  31. /* Initialize all configured peripherals */
  32. GPIO_Init();
  33. DMA_Init();
  34. /* Start RGB & Tube Power PWM */
  35. TIM1_Init();
  36. TIM3_Init();
  37. //TIM14_Init();
  38. //TIM16_Init();
  39. //TIM17_Init();
  40. USART1_UART_Init();
  41. }
  42. /**
  43. * @brief System Clock Configuration
  44. * @retval None
  45. */
  46. void SystemClock_Config(void)
  47. {
  48. /* HSI configuration and activation */
  49. RCC->CR |= RCC_CR_HSIKERON; // Enable HSI even in stop mode
  50. while((RCC->CR & RCC_CR_HSIRDY) == 0)
  51. {
  52. }
  53. /* Main PLL configuration and activation */
  54. RCC->PLLCFGR &= ~(RCC_PLLCFGR_PLLSRC | RCC_PLLCFGR_PLLM | RCC_PLLCFGR_PLLN | RCC_PLLCFGR_PLLR);
  55. RCC->PLLCFGR |= (RCC_PLLCFGR_PLLSRC_HSI | (9 << RCC_PLLCFGR_PLLN_Pos) | RCC_PLLCFGR_PLLR_2 | RCC_PLLCFGR_PLLR_0);
  56. RCC->PLLCFGR |= RCC_PLLCFGR_PLLREN; // RCC_PLL_EnableDomain_SYS
  57. RCC->CR |= RCC_CR_PLLON; // RCC_PLL_Enable
  58. while((RCC->CR & RCC_CR_PLLRDY) == 0)
  59. {
  60. }
  61. /* Set AHB prescaler*/
  62. //RCC->CFGR &= ~(RCC_CFGR_HPRE);
  63. //RCC->CFGR |= 0x00000000U;
  64. /* Sysclk activation on the main PLL */
  65. RCC->CFGR &= RCC_CFGR_SW;
  66. RCC->CFGR |= RCC_CFGR_SW_1;
  67. while((RCC->CFGR & RCC_CFGR_SWS) != RCC_CFGR_SWS_1)
  68. {
  69. }
  70. /* Set APB1 prescaler !!! uncorrect !!! */
  71. //RCC->CFGR &= RCC_CFGR_PPRE;
  72. //RCC->CFGR |= 0x00000000U;
  73. /* Update CMSIS variable (which can be updated also through SystemCoreClockUpdate function) */
  74. SystemCoreClock = 24000000;
  75. /* Set I2C Clock Source */
  76. RCC->CCIPR &= ~(RCC_CCIPR_I2C1SEL);
  77. RCC->CCIPR |= RCC_CCIPR_I2C1SEL_1;
  78. }
  79. /**
  80. * @brief GPIO Initialization Function
  81. * @param None
  82. * @retval None
  83. */
  84. static void GPIO_Init(void)
  85. {
  86. /* GPIO Ports Clock Enable */
  87. RCC->IOPENR |= (RCC_IOPENR_GPIOAEN | RCC_IOPENR_GPIOBEN | RCC_IOPENR_GPIOCEN);
  88. /* EXTI Line: falling, no pull, input */
  89. // mode
  90. EXTI->EMR1 &= ~(EXTI_IMR1_IM14);
  91. EXTI->EMR1 |= EXTI_IMR1_IM14;
  92. // TRIGGER FALLING
  93. EXTI->FTSR1 &= ~(EXTI_IMR1_IM14);
  94. EXTI->FTSR1 |= EXTI_IMR1_IM14;
  95. // ?
  96. EXTI->FTSR1 |= EXTI_IMR1_IM14;
  97. /* EXTI interrupt init*/
  98. NVIC_SetPriority(EXTI4_15_IRQn, 0);
  99. NVIC_EnableIRQ(EXTI4_15_IRQn);
  100. /* L0, L1, L2, L3 - IN-15 symbols control, PP out, high speed, pull down */
  101. GPIO_SetPinMode(LC0_GPIO_Port, LC0_Pin, GPIO_MODE_OUT);
  102. GPIO_SetPinSpeed(LC0_GPIO_Port, LC0_Pin, GPIO_OSPEED_HI);
  103. GPIO_SetPinPull(LC0_GPIO_Port, LC0_Pin, GPIO_PUPDR_DW);
  104. GPIO_SetPinMode(LC1_GPIO_Port, LC1_Pin, GPIO_MODE_OUT);
  105. GPIO_SetPinSpeed(LC1_GPIO_Port, LC1_Pin, GPIO_OSPEED_HI);
  106. GPIO_SetPinPull(LC1_GPIO_Port, LC1_Pin, GPIO_PUPDR_DW);
  107. GPIO_SetPinMode(LC2_GPIO_Port, LC2_Pin, GPIO_MODE_OUT);
  108. GPIO_SetPinSpeed(LC2_GPIO_Port, LC2_Pin, GPIO_OSPEED_HI);
  109. GPIO_SetPinPull(LC2_GPIO_Port, LC2_Pin, GPIO_PUPDR_DW);
  110. GPIO_SetPinMode(LC3_GPIO_Port, LC3_Pin, GPIO_MODE_OUT);
  111. GPIO_SetPinSpeed(LC3_GPIO_Port, LC3_Pin, GPIO_OSPEED_HI);
  112. GPIO_SetPinPull(LC3_GPIO_Port, LC3_Pin, GPIO_PUPDR_DW);
  113. /* Pwer Shutdown: PP out, high speed, pull down */
  114. GPIO_SetPinMode(SHDN_GPIO_Port, SHDN_Pin, GPIO_MODE_OUT);
  115. GPIO_SetPinSpeed(SHDN_GPIO_Port, SHDN_Pin, GPIO_OSPEED_HI);
  116. GPIO_SetPinPull(SHDN_GPIO_Port, SHDN_Pin, GPIO_PUPDR_DW);
  117. /* SPI Latch: OD out, high speed, no pull */
  118. GPIO_SetPinMode(Latch_GPIO_Port, Latch_Pin, GPIO_MODE_OUT);
  119. GPIO_SetPinOutputType(Latch_GPIO_Port, Latch_Pin, GPIO_OTYPE_OD);
  120. GPIO_SetPinSpeed(Latch_GPIO_Port, Latch_Pin, GPIO_OSPEED_HI);
  121. /* UART_Enable: PP out, low speed, no pull*/
  122. GPIO_SetPinMode(UART_EN_GPIO_Port, UART_EN_Pin, GPIO_MODE_OUT);
  123. /* UART_State: input, pull up */
  124. GPIO_SetPinPull(UART_ST_GPIO_Port, UART_ST_Pin, GPIO_PUPDR_UP);
  125. /* BTN1, BTN2, BTN3, BTN4: input, pull up */
  126. GPIO_SetPinPull(BTN1_GPIO_Port, BTN1_Pin, GPIO_PUPDR_UP);
  127. GPIO_SetPinPull(BTN2_GPIO_Port, BTN2_Pin, GPIO_PUPDR_UP);
  128. GPIO_SetPinPull(BTN3_GPIO_Port, BTN3_Pin, GPIO_PUPDR_UP);
  129. GPIO_SetPinPull(BTN4_GPIO_Port, BTN4_Pin, GPIO_PUPDR_UP);
  130. }
  131. /**
  132. * Enable DMA controller clock
  133. */
  134. static void DMA_Init(void)
  135. {
  136. /* Init with LL driver */
  137. /* DMA controller clock enable */
  138. RCC->AHBSMENR |= RCC_AHBENR_DMA1EN;
  139. /* DMA interrupt init */
  140. /* DMA1_Channel1_IRQn interrupt configuration */
  141. NVIC_SetPriority(DMA1_Channel1_IRQn, 0);
  142. NVIC_EnableIRQ(DMA1_Channel1_IRQn);
  143. /* DMA1_Channel2_3_IRQn interrupt configuration */
  144. NVIC_SetPriority(DMA1_Channel2_3_IRQn, 0);
  145. NVIC_EnableIRQ(DMA1_Channel2_3_IRQn);
  146. }
  147. /**
  148. * @brief TIM1 Initialization Function
  149. * @param None
  150. * @retval None
  151. */
  152. static void TIM1_Init(void)
  153. {
  154. /* Peripheral clock TIM1 enable */
  155. RCC->APBENR2 |= RCC_APBENR2_TIM1EN;
  156. /* Peripheral clock GPIOA enable */
  157. RCC->IOPENR |= RCC_IOPENR_GPIOAEN;
  158. /* target clock - 200 Hz */
  159. TIM1->PSC = TIM1_PSC; // prescaler
  160. TIM1->ARR = TIM1_ARR; // auto reload value
  161. TIM1->CR1 = TIM_CR1_ARPE;
  162. // initial pwm value
  163. TIM1->CCR1 = PWM_TUBE_INIT_VAL;
  164. TIM1->CCR2 = PWM_LED_INIT_VAL;
  165. TIM1->CCR3 = PWM_LED_INIT_VAL;
  166. TIM1->CCR4 = PWM_LED_INIT_VAL;
  167. // pwm mode 1 for 4 chanels
  168. TIM1->CCMR1 = (TIM_CCMR1_OC1M_1 | TIM_CCMR1_OC1M_2 | TIM_CCMR1_OC2M_1 | TIM_CCMR1_OC2M_2 | TIM_CCMR1_OC1PE | TIM_CCMR1_OC2PE);
  169. TIM1->CCMR2 = (TIM_CCMR2_OC3M_1 | TIM_CCMR2_OC3M_2 | TIM_CCMR2_OC4M_1 | TIM_CCMR2_OC4M_2 | TIM_CCMR2_OC3PE | TIM_CCMR2_OC4PE);
  170. // reset int flag - not needed, int unused
  171. //TIM1->SR |= TIM_SR_UIF;
  172. TIM1->BDTR = TIM_BDTR_MOE; // enable main output
  173. TIM1->EGR = TIM_EGR_UG; // force timer update
  174. /* TIM1 CC_EnableChannel */
  175. TIM1->CCER = (TIM_CCER_CC1E | TIM_CCER_CC2E | TIM_CCER_CC3E | TIM_CCER_CC4E);
  176. /* TIM_EnableCounter */
  177. TIM1->CR1 |= TIM_CR1_CEN;
  178. /** TIM1 GPIO Configuration
  179. PA8 ------> TIM1_CH1
  180. PA9 ------> TIM1_CH2
  181. PA10 ------> TIM1_CH3
  182. PA11 [PA9] ------> TIM1_CH4
  183. */
  184. GPIO_SetPinMode(PWM_1_GPIO_Port, PWM_1_Pin, GPIO_MODE_AFF);
  185. GPIO_SetPinSpeed(PWM_1_GPIO_Port, PWM_1_Pin, GPIO_OSPEED_HI);
  186. GPIO_SetPinPull(PWM_1_GPIO_Port, PWM_1_Pin, GPIO_PUPDR_DW);
  187. GPIO_SetAFPin_8_15(PWM_1_GPIO_Port, PWM_1_Pin, GPIO_AF_2);
  188. GPIO_SetPinMode(PWM_R_GPIO_Port, PWM_R_Pin, GPIO_MODE_AFF);
  189. GPIO_SetPinSpeed(PWM_R_GPIO_Port, PWM_R_Pin, GPIO_OSPEED_HI);
  190. GPIO_SetPinPull(PWM_R_GPIO_Port, PWM_R_Pin, GPIO_PUPDR_DW);
  191. GPIO_SetAFPin_8_15(PWM_R_GPIO_Port, PWM_R_Pin, GPIO_AF_2);
  192. GPIO_SetPinMode(PWM_B_GPIO_Port, PWM_B_Pin, GPIO_MODE_AFF);
  193. GPIO_SetPinSpeed(PWM_B_GPIO_Port, PWM_B_Pin, GPIO_OSPEED_HI);
  194. GPIO_SetPinPull(PWM_B_GPIO_Port, PWM_B_Pin, GPIO_PUPDR_DW);
  195. GPIO_SetAFPin_8_15(PWM_B_GPIO_Port, PWM_B_Pin, GPIO_AF_2);
  196. GPIO_SetPinMode(PWM_G_GPIO_Port, PWM_G_Pin, GPIO_MODE_AFF);
  197. GPIO_SetPinSpeed(PWM_G_GPIO_Port, PWM_G_Pin, GPIO_OSPEED_HI);
  198. GPIO_SetPinPull(PWM_G_GPIO_Port, PWM_G_Pin, GPIO_PUPDR_DW);
  199. GPIO_SetAFPin_8_15(PWM_G_GPIO_Port, PWM_G_Pin, GPIO_AF_2);
  200. }
  201. /**
  202. * @brief TIM3 Initialization Function
  203. * @param None
  204. * @retval None
  205. */
  206. static void TIM3_Init(void)
  207. {
  208. /* Peripheral clock TIM1 enable */
  209. RCC->APBENR1 |= RCC_APBENR1_TIM3EN;
  210. /* Peripheral clock GPIOA and GPIOB enable */
  211. RCC->IOPENR |= (RCC_IOPENR_GPIOAEN | RCC_IOPENR_GPIOBEN);
  212. /* target clock - 200 Hz */
  213. TIM3->PSC = TIM3_PSC; // prescaler
  214. TIM3->ARR = TIM3_ARR; // auto reload value
  215. TIM3->CR1 = TIM_CR1_ARPE;
  216. // initial pwm value
  217. TIM3->CCR1 = PWM_TUBE_INIT_VAL;
  218. TIM3->CCR2 = PWM_TUBE_INIT_VAL;
  219. TIM3->CCR3 = PWM_TUBE_INIT_VAL;
  220. TIM3->CCR4 = PWM_TUBE_INIT_VAL;
  221. // pwm mode 1 for 4 chanels
  222. TIM3->CCMR1 = (TIM_CCMR1_OC1M_1 | TIM_CCMR1_OC1M_2 | TIM_CCMR1_OC2M_1 | TIM_CCMR1_OC2M_2 | TIM_CCMR1_OC1PE | TIM_CCMR1_OC2PE);
  223. TIM3->CCMR2 = (TIM_CCMR2_OC3M_1 | TIM_CCMR2_OC3M_2 | TIM_CCMR2_OC4M_1 | TIM_CCMR2_OC4M_2 | TIM_CCMR2_OC3PE | TIM_CCMR2_OC4PE);
  224. // launch timer
  225. TIM3->EGR = TIM_EGR_UG; // force timer update
  226. /* TIM3 TIM_CC_EnableChannel */
  227. TIM3->CCER = (TIM_CCER_CC1E | TIM_CCER_CC2E | TIM_CCER_CC3E | TIM_CCER_CC4E);
  228. /* TIM3 enable */
  229. TIM3->CR1 |= TIM_CR1_CEN;
  230. /**TIM3 GPIO Configuration
  231. PA6 ------> TIM3_CH1
  232. PA7 ------> TIM3_CH2
  233. PB0 ------> TIM3_CH3
  234. PB1 ------> TIM3_CH4
  235. */
  236. GPIO_SetPinMode(PWM_5_GPIO_Port, PWM_5_Pin, GPIO_MODE_AFF);
  237. GPIO_SetPinSpeed(PWM_5_GPIO_Port, PWM_5_Pin, GPIO_OSPEED_HI);
  238. GPIO_SetPinPull(PWM_5_GPIO_Port, PWM_5_Pin, GPIO_PUPDR_DW);
  239. GPIO_SetAFPin_0_7(PWM_5_GPIO_Port, PWM_5_Pin, GPIO_AF_1);
  240. GPIO_SetPinMode(PWM_4_GPIO_Port, PWM_4_Pin, GPIO_MODE_AFF);
  241. GPIO_SetPinSpeed(PWM_4_GPIO_Port, PWM_4_Pin, GPIO_OSPEED_HI);
  242. GPIO_SetPinPull(PWM_4_GPIO_Port, PWM_4_Pin, GPIO_PUPDR_DW);
  243. GPIO_SetAFPin_0_7(PWM_4_GPIO_Port, PWM_4_Pin, GPIO_AF_1);
  244. GPIO_SetPinMode(PWM_3_GPIO_Port, PWM_3_Pin, GPIO_MODE_AFF);
  245. GPIO_SetPinSpeed(PWM_3_GPIO_Port, PWM_3_Pin, GPIO_OSPEED_HI);
  246. GPIO_SetPinPull(PWM_3_GPIO_Port, PWM_3_Pin, GPIO_PUPDR_DW);
  247. GPIO_SetAFPin_0_7(PWM_3_GPIO_Port, PWM_3_Pin, GPIO_AF_1);
  248. GPIO_SetPinMode(PWM_2_GPIO_Port, PWM_2_Pin, GPIO_MODE_AFF);
  249. GPIO_SetPinSpeed(PWM_2_GPIO_Port, PWM_2_Pin, GPIO_OSPEED_HI);
  250. GPIO_SetPinPull(PWM_2_GPIO_Port, PWM_2_Pin, GPIO_PUPDR_DW);
  251. GPIO_SetAFPin_0_7(PWM_2_GPIO_Port, PWM_2_Pin, GPIO_AF_1);
  252. }
  253. /**
  254. * @brief TIM14 Initialization Function
  255. * @param None
  256. * @retval None
  257. * @desc "Блинкование" разрядами - 0,75/0,25 сек вкл/выкл.
  258. */
  259. static void TIM14_Init(void)
  260. {
  261. /* Peripheral clock enable */
  262. RCC->APBENR2 |= RCC_APBENR2_TIM14EN;
  263. /* TIM14 interrupt Init */
  264. NVIC_SetPriority(TIM14_IRQn, 0);
  265. NVIC_EnableIRQ(TIM14_IRQn);
  266. /* Set TIM14 for 1 sec period */
  267. TIM14->PSC = TIM14_PSC;
  268. TIM14->ARR = TIM14_ARR;
  269. /* Enable: Auto-reload preload, One-pulse mode, */
  270. TIM14->CR1 = (TIM_CR1_ARPE | TIM_CR1_OPM);
  271. /* OC or PWM? (for pwm - (TIM_CCMR1_OC1M_2 | TIM_CCMR1_OC1M_1) ) , Output compare 1 preload */
  272. TIM14->CCMR1 = (TIM_CCMR1_OC1M_0 | TIM_CCMR1_OC1PE);
  273. /* Enable Channel_1 or no needed ??? */
  274. TIM14->CCER = TIM_CCER_CC1E;
  275. /* Impulse value in msek */
  276. TIM14->CCR1 = TIM14_PULSE_VAL;
  277. /* Enable IRQ for Update end CaptureCompare envents or only CC ??? */
  278. //TIM14->DIER = (TIM_DIER_UIE | TIM_DIER_CC1IE);
  279. TIM14->DIER = TIM_DIER_CC1IE;
  280. }
  281. /**
  282. * На старте активируем все каналы, при совпадении отключаем (не)нужные.
  283. */
  284. void Blink_Start(void)
  285. {
  286. /* enable all channels */
  287. TUBE_ALL_ON;
  288. /* clear IRQ flag */
  289. TIM14->SR |= TIM_SR_CC1IF;
  290. /* clear counter value */
  291. TIM14->CNT = 0;
  292. /* enable timer */
  293. TIM14->CR1 |= TIM_CR1_CEN;
  294. }
  295. void Blink_Stop(void)
  296. {
  297. /* disable timer */
  298. TIM14->CR1 &= ~(TIM_CR1_CEN);
  299. /* On all tubes */
  300. TUBE_ALL_ON;
  301. }
  302. /**
  303. * @brief TIM16 Initialization Function
  304. * @param None
  305. * @retval None
  306. */
  307. static void TIM16_Init(void)
  308. {
  309. /* Peripheral clock enable */
  310. RCC->APBENR2 |= RCC_APBENR2_TIM16EN;
  311. /* TIM16 interrupt Init */
  312. NVIC_SetPriority(TIM16_IRQn, 0);
  313. NVIC_EnableIRQ(TIM16_IRQn);
  314. /* setup clock */
  315. TIM16->PSC = TIM16_PSC; // prescaler
  316. TIM16->ARR = TIM16_ARR; // auto reload value
  317. TIM16->CR1 = TIM_CR1_ARPE;
  318. // initial pwm value
  319. //TIM16->CCR1 = TIM16_PWM_VAL;
  320. // pwm mode 1 for 1 chanel
  321. TIM16->CCMR1 = (TIM_CCMR1_OC1M_1 | TIM_CCMR1_OC1M_2 | TIM_CCMR1_OC1PE);
  322. // reset int flag
  323. TIM16->SR |= TIM_SR_UIF;
  324. TIM16->BDTR = TIM_BDTR_MOE; // enable main output
  325. TIM16->EGR = TIM_EGR_UG; // force timer update
  326. /* TIM16 CC_EnableChannel */
  327. TIM16->CCER = TIM_CCER_CC1E;
  328. /* TIM_EnableCounter */
  329. TIM16->CR1 |= TIM_CR1_CEN;
  330. /* Enable IRQ */
  331. TIM16->DIER = TIM_DIER_UIE;
  332. }
  333. /**
  334. * @brief TIM17 Initialization Function
  335. * @param None
  336. * @retval None
  337. */
  338. static void TIM17_Init(void)
  339. {
  340. /* Peripheral clock enable */
  341. RCC->APBENR2 |= RCC_APBENR2_TIM17EN;
  342. /* TIM17 interrupt Init */
  343. NVIC_SetPriority(TIM17_IRQn, 0);
  344. NVIC_EnableIRQ(TIM17_IRQn);
  345. /* setup clock */
  346. TIM17->PSC = TIM17_PSC; // prescaler
  347. TIM17->ARR = TIM17_ARR; // auto reload value
  348. TIM17->CR1 = TIM_CR1_ARPE;
  349. // initial pwm value
  350. //TIM17->CCR1 = TIM17_PWM_VAL;
  351. // pwm mode 1 for 1 chanel
  352. TIM17->CCMR1 = (TIM_CCMR1_OC1M_1 | TIM_CCMR1_OC1M_2 | TIM_CCMR1_OC1PE);
  353. // reset int flag
  354. TIM17->SR |= TIM_SR_UIF;
  355. TIM17->BDTR = TIM_BDTR_MOE; // enable main output
  356. TIM17->EGR = TIM_EGR_UG; // force timer update
  357. /* TIM17 CC_EnableChannel */
  358. TIM17->CCER = TIM_CCER_CC1E;
  359. /* TIM_EnableCounter */
  360. TIM17->CR1 |= TIM_CR1_CEN;
  361. /* Enable IRQ */
  362. TIM17->DIER = TIM_DIER_UIE;
  363. }
  364. /**
  365. * @brief USART1 Initialization Function
  366. * @param None
  367. * @retval None
  368. */
  369. static void USART1_UART_Init(void)
  370. {
  371. /* Peripheral clock enable */
  372. RCC->APBENR2 |= RCC_APBENR2_USART1EN;
  373. RCC->IOPENR |= RCC_IOPENR_GPIOBEN;
  374. /**USART1 GPIO Configuration
  375. PB6 ------> USART1_TX
  376. PB7 ------> USART1_RX
  377. */
  378. GPIO_SetPinMode(GPIOB, GPIO_PIN_6, GPIO_MODE_AFF);
  379. GPIO_SetPinSpeed(GPIOB, GPIO_PIN_6, GPIO_OSPEED_HI);
  380. GPIO_SetPinMode(GPIOB, GPIO_PIN_7, GPIO_MODE_AFF);
  381. GPIO_SetPinSpeed(GPIOB, GPIO_PIN_7, GPIO_OSPEED_HI);
  382. /* USART1 interrupt Init */
  383. NVIC_SetPriority(USART1_IRQn, 0);
  384. NVIC_EnableIRQ(USART1_IRQn);
  385. USART1->CR1 |= (USART_CR1_TE |USART_CR1_RE);
  386. USART1->BRR = 138;
  387. /* USART1 Enable */
  388. USART1->CR1 |= USART_CR1_UE;
  389. /* Polling USART1 initialisation */
  390. while((!(USART1->ISR & USART_ISR_TEACK)) || (!(USART1->ISR & USART_ISR_REACK)))
  391. {
  392. }
  393. }