void serial_init(serial_t *obj, PinName tx, PinName rx) { // Determine the UART to use (UART_1, UART_2, ...) UARTName uart_tx = (UARTName)pinmap_peripheral(tx, PinMap_UART_TX); UARTName uart_rx = (UARTName)pinmap_peripheral(rx, PinMap_UART_RX); // Get the peripheral name (UART_1, UART_2, ...) from the pin and assign it to the object obj->uart = (UARTName)pinmap_merge(uart_tx, uart_rx); MBED_ASSERT(obj->uart != (UARTName)NC); // Enable USART clock + switch to SystemClock if (obj->uart == UART_1) { __USART1_CLK_ENABLE(); __HAL_RCC_USART1_CONFIG(RCC_USART1CLKSOURCE_SYSCLK); obj->index = 0; } if (obj->uart == UART_2) { __USART2_CLK_ENABLE(); __HAL_RCC_USART2_CONFIG(RCC_USART2CLKSOURCE_SYSCLK); obj->index = 1; } if (obj->uart == UART_3) { __USART3_CLK_ENABLE(); __HAL_RCC_USART3_CONFIG(RCC_USART3CLKSOURCE_SYSCLK); obj->index = 2; } // Configure the UART pins pinmap_pinout(tx, PinMap_UART_TX); pinmap_pinout(rx, PinMap_UART_RX); if (tx != NC) { pin_mode(tx, PullUp); } if (rx != NC) { pin_mode(rx, PullUp); } // Configure UART obj->baudrate = 9600; obj->databits = UART_WORDLENGTH_8B; obj->stopbits = UART_STOPBITS_1; obj->parity = UART_PARITY_NONE; obj->pin_tx = tx; obj->pin_rx = rx; init_uart(obj); // For stdio management if (obj->uart == STDIO_UART) { stdio_uart_inited = 1; memcpy(&stdio_uart, obj, sizeof(serial_t)); } }
/** * @brief Initializes the RCC extended peripherals clocks according to the specified parameters in the * RCC_PeriphCLKInitTypeDef. * @param PeriphClkInit: pointer to an RCC_PeriphCLKInitTypeDef structure that * contains the configuration information for the Extended Peripherals clocks(USART1,USART2, LPUART1, * I2C1, RTC, USB/RNG and LPTIM1 clocks). * @retval HAL status */ HAL_StatusTypeDef HAL_RCCEx_PeriphCLKConfig(RCC_PeriphCLKInitTypeDef *PeriphClkInit) { uint32_t tickstart = 0; uint32_t tmpreg = 0; /* Check the parameters */ assert_param(IS_RCC_PERIPHCLK(PeriphClkInit->PeriphClockSelection)); /*------------------------------- USART1 Configuration ------------------------*/ if(((PeriphClkInit->PeriphClockSelection) & RCC_PERIPHCLK_USART1) == RCC_PERIPHCLK_USART1) { /* Check the parameters */ assert_param(IS_RCC_USART1CLKSOURCE(PeriphClkInit->Usart1ClockSelection)); /* Configure the USART1 clock source */ __HAL_RCC_USART1_CONFIG(PeriphClkInit->Usart1ClockSelection); } /*----------------------------- USART2 Configuration --------------------------*/ if(((PeriphClkInit->PeriphClockSelection) & RCC_PERIPHCLK_USART2) == RCC_PERIPHCLK_USART2) { /* Check the parameters */ assert_param(IS_RCC_USART2CLKSOURCE(PeriphClkInit->Usart2ClockSelection)); /* Configure the USART2 clock source */ __HAL_RCC_USART2_CONFIG(PeriphClkInit->Usart2ClockSelection); } /*------------------------------ LPUART1 Configuration ------------------------*/ if(((PeriphClkInit->PeriphClockSelection) & RCC_PERIPHCLK_LPUART1) == RCC_PERIPHCLK_LPUART1) { /* Check the parameters */ assert_param(IS_RCC_LPUART1CLKSOURCE(PeriphClkInit->Lpuart1ClockSelection)); /* Configure the LPUAR1 clock source */ __HAL_RCC_LPUART1_CONFIG(PeriphClkInit->Lpuart1ClockSelection); } /*------------------------------ I2C1 Configuration ------------------------*/ if(((PeriphClkInit->PeriphClockSelection) & RCC_PERIPHCLK_I2C1) == RCC_PERIPHCLK_I2C1) { /* Check the parameters */ assert_param(IS_RCC_I2C1CLKSOURCE(PeriphClkInit->I2c1ClockSelection)); /* Configure the I2C1 clock source */ __HAL_RCC_I2C1_CONFIG(PeriphClkInit->I2c1ClockSelection); } /*---------------------------- RTC configuration -------------------------------*/ if(((PeriphClkInit->PeriphClockSelection) & RCC_PERIPHCLK_RTC) == (RCC_PERIPHCLK_RTC)) { /* Enable Power Clock*/ __PWR_CLK_ENABLE(); /* Enable write access to Backup domain */ PWR->CR |= PWR_CR_DBP; /* Wait for Backup domain Write protection disable */ tickstart = HAL_GetTick(); while((PWR->CR & PWR_CR_DBP) == RESET) { if((HAL_GetTick() - tickstart ) > DBP_TIMEOUT_VALUE) { return HAL_TIMEOUT; } } /* Reset the Backup domain only if the RTC Clock source selection is modified */ if((RCC->CSR & RCC_CSR_RTCSEL) != (PeriphClkInit->RTCClockSelection & RCC_CSR_RTCSEL)) { /* Store the content of CSR register before the reset of Backup Domain */ tmpreg = (RCC->CSR & ~(RCC_CSR_RTCSEL)); /* RTC Clock selection can be changed only if the Backup Domain is reset */ __HAL_RCC_BACKUPRESET_FORCE(); __HAL_RCC_BACKUPRESET_RELEASE(); /* Restore the Content of CSR register */ RCC->CSR = tmpreg; } /* If LSE is selected as RTC clock source, wait for LSE reactivation */ if(PeriphClkInit->RTCClockSelection == RCC_RTCCLKSOURCE_LSE) { /* Get timeout */ tickstart = HAL_GetTick(); /* Wait till LSE is ready */ while(__HAL_RCC_GET_FLAG(RCC_FLAG_LSERDY) == RESET) { if((HAL_GetTick() - tickstart ) > LSE_TIMEOUT_VALUE) { return HAL_TIMEOUT; } } } __HAL_RCC_RTC_CONFIG(PeriphClkInit->RTCClockSelection); } #if !defined(STM32L051xx) && !defined(STM32L061xx) /*---------------------------- USB and RNG configuration --------------------*/ if(((PeriphClkInit->PeriphClockSelection) & RCC_PERIPHCLK_USB) == (RCC_PERIPHCLK_USB)) { assert_param(IS_RCC_USBCLKSOURCE(PeriphClkInit->UsbClockSelection)); __HAL_RCC_USB_CONFIG(PeriphClkInit->UsbClockSelection); } #endif /* !(STM32L051xx) && !(STM32L061xx) */ /*---------------------------- LPTIM1 configuration ------------------------*/ if(((PeriphClkInit->PeriphClockSelection) & RCC_PERIPHCLK_LPTIM1) == (RCC_PERIPHCLK_LPTIM1)) { assert_param(IS_RCC_LPTIMCLK(PeriphClkInit->LptimClockSelection)); __HAL_RCC_LPTIM1_CONFIG(PeriphClkInit->LptimClockSelection); } return HAL_OK; }
void serial_init(serial_t *obj, PinName tx, PinName rx) { struct serial_s *obj_s = SERIAL_S(obj); // Determine the UART to use (UART_1, UART_2, ...) UARTName uart_tx = (UARTName)pinmap_peripheral(tx, PinMap_UART_TX); UARTName uart_rx = (UARTName)pinmap_peripheral(rx, PinMap_UART_RX); // Get the peripheral name (UART_1, UART_2, ...) from the pin and assign it to the object obj_s->uart = (UARTName)pinmap_merge(uart_tx, uart_rx); MBED_ASSERT(obj_s->uart != (UARTName)NC); // Enable USART clock + switch to SystemClock if (obj_s->uart == UART_1) { __USART1_FORCE_RESET(); __USART1_RELEASE_RESET(); __USART1_CLK_ENABLE(); #if defined(RCC_USART1CLKSOURCE_SYSCLK) __HAL_RCC_USART1_CONFIG(RCC_USART1CLKSOURCE_SYSCLK); #endif obj_s->index = 0; } #if defined(USART2_BASE) if (obj_s->uart == UART_2) { __USART2_FORCE_RESET(); __USART2_RELEASE_RESET(); __USART2_CLK_ENABLE(); #if defined(RCC_USART2CLKSOURCE_SYSCLK) __HAL_RCC_USART2_CONFIG(RCC_USART2CLKSOURCE_SYSCLK); #endif obj_s->index = 1; } #endif #if defined(USART3_BASE) if (obj_s->uart == UART_3) { __USART3_FORCE_RESET(); __USART3_RELEASE_RESET(); __USART3_CLK_ENABLE(); #if defined(RCC_USART3CLKSOURCE_SYSCLK) __HAL_RCC_USART3_CONFIG(RCC_USART3CLKSOURCE_SYSCLK); #endif obj_s->index = 2; } #endif #if defined(UART4_BASE) if (obj_s->uart == UART_4) { __UART4_FORCE_RESET(); __UART4_RELEASE_RESET(); __UART4_CLK_ENABLE(); #if defined(RCC_UART4CLKSOURCE_SYSCLK) __HAL_RCC_UART4_CONFIG(RCC_UART4CLKSOURCE_SYSCLK); #endif obj_s->index = 3; } #endif #if defined(UART5_BASE) if (obj_s->uart == UART_5) { __HAL_RCC_UART5_FORCE_RESET(); __HAL_RCC_UART5_RELEASE_RESET(); __UART5_CLK_ENABLE(); #if defined(RCC_UART5CLKSOURCE_SYSCLK) __HAL_RCC_UART5_CONFIG(RCC_UART5CLKSOURCE_SYSCLK); #endif obj_s->index = 4; } #endif // Configure the UART pins pinmap_pinout(tx, PinMap_UART_TX); pinmap_pinout(rx, PinMap_UART_RX); if (tx != NC) { pin_mode(tx, PullUp); } if (rx != NC) { pin_mode(rx, PullUp); } // Configure UART obj_s->baudrate = 9600; obj_s->databits = UART_WORDLENGTH_8B; obj_s->stopbits = UART_STOPBITS_1; obj_s->parity = UART_PARITY_NONE; #if DEVICE_SERIAL_FC obj_s->hw_flow_ctl = UART_HWCONTROL_NONE; #endif obj_s->pin_tx = tx; obj_s->pin_rx = rx; init_uart(obj); // For stdio management if (obj_s->uart == STDIO_UART) { stdio_uart_inited = 1; memcpy(&stdio_uart, obj, sizeof(serial_t)); } }