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
if (obj->uart == UART_1) {
__USART1_CLK_ENABLE();
obj->index = 0;
}
#if defined USART2_BASE
if (obj->uart == UART_2) {
__USART2_CLK_ENABLE();
obj->index = 1;
}
#endif
#if defined USART3_BASE
if (obj->uart == UART_3) {
__USART3_CLK_ENABLE();
obj->index = 2;
}
#endif
#if defined USART4_BASE
if (obj->uart == UART_4) {
__USART4_CLK_ENABLE();
obj->index = 3;
}
#endif
#if defined USART5_BASE
if (obj->uart == UART_5) {
__USART5_CLK_ENABLE();
obj->index = 4;
}
#endif
#if defined USART6_BASE
if (obj->uart == UART_6) {
__USART6_CLK_ENABLE();
obj->index = 5;
}
#endif
#if defined USART7_BASE
if (obj->uart == UART_7) {
__USART7_CLK_ENABLE();
obj->index = 6;
}
#endif
#if defined USART8_BASE
if (obj->uart == UART_8) {
__USART8_CLK_ENABLE();
obj->index = 7;
}
#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->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 UART MSP Initialization
* This function configures the hardware resources used in this example:
* - Peripheral's clock enable
* - Peripheral's GPIO Configuration
* - NVIC configuration for UART interrupt request enable
* @param huart: UART handle pointer
* @retval None
*/
void HAL_UART_MspInit(UART_HandleTypeDef *huart)
{
GPIO_InitTypeDef GPIO_InitStruct;
switch((uint32_t)huart->Instance)
{
case (uint32_t)USART1 :
{
/*##-1- Enable peripherals and GPIO Clocks #################################*/
/* Enable GPIO TX/RX clock */
__GPIOA_CLK_ENABLE();
/* Enable USARTx clock */
__USART1_CLK_ENABLE();
/*##-2- Configure peripheral GPIO ##########################################*/
/* UART TX GPIO pin configuration */
GPIO_InitStruct.Pin = GPIO_PIN_9 | GPIO_PIN_10;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF1_USART1;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
/*##-3- Configure the NVIC for UART ########################################*/
/* NVIC for USART */
HAL_NVIC_SetPriority(USART1_IRQn, 1, 0);
HAL_NVIC_EnableIRQ(USART1_IRQn);
}
break;
case (uint32_t)USART2 :
{
/*##-1- Enable peripherals and GPIO Clocks #################################*/
/* Enable GPIO TX/RX clock */
__GPIOD_CLK_ENABLE();
/* Enable USARTx clock */
__USART2_CLK_ENABLE();
/*##-2- Configure peripheral GPIO ##########################################*/
/* UART TX GPIO pin configuration */
GPIO_InitStruct.Pin = GPIO_PIN_6 | GPIO_PIN_5;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF0_USART2;
HAL_GPIO_Init(GPIOD, &GPIO_InitStruct);
/*##-3- Configure the NVIC for UART ########################################*/
/* NVIC for USART */
HAL_NVIC_SetPriority(USART2_IRQn, 1, 0);
HAL_NVIC_EnableIRQ(USART2_IRQn);
}
break;
case (uint32_t)USART3 :
{
/*##-1- Enable peripherals and GPIO Clocks #################################*/
/* Enable GPIO TX/RX clock */
__GPIOD_CLK_ENABLE();
/* To allow the IT source identification */
__SYSCFG_CLK_ENABLE();
/* Enable USARTx clock */
__USART3_CLK_ENABLE();
/*##-2- Configure peripheral GPIO ##########################################*/
/* UART TX GPIO pin configuration */
GPIO_InitStruct.Pin = GPIO_PIN_8 | GPIO_PIN_9;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF0_USART3;
HAL_GPIO_Init(GPIOD, &GPIO_InitStruct);
/*##-3- Configure the NVIC for UART ########################################*/
/* NVIC for USART */
HAL_NVIC_SetPriority(USART3_8_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(USART3_8_IRQn);
}
break;
case (uint32_t)USART4 :
{
/*##-1- Enable peripherals and GPIO Clocks #################################*/
/* Enable GPIO TX/RX clock */
__GPIOC_CLK_ENABLE();
/* To allow the IT source identification */
__SYSCFG_CLK_ENABLE();
/* Enable USARTx clock */
__USART4_CLK_ENABLE();
/*##-2- Configure peripheral GPIO ##########################################*/
/* UART TX GPIO pin configuration */
GPIO_InitStruct.Pin = GPIO_PIN_10 | GPIO_PIN_11;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF0_USART4;
HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
/*##-3- Configure the NVIC for UART ########################################*/
/* NVIC for USART */
HAL_NVIC_SetPriority(USART3_8_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(USART3_8_IRQn);
}
break;
case (uint32_t)USART5 :
{
/*##-1- Enable peripherals and GPIO Clocks #################################*/
/* Enable GPIO TX/RX clock */
__GPIOB_CLK_ENABLE();
/* To allow the IT source identification */
__SYSCFG_CLK_ENABLE();
/* Enable USARTx clock */
__USART5_CLK_ENABLE();
/*##-2- Configure peripheral GPIO ##########################################*/
/* UART TX GPIO pin configuration */
GPIO_InitStruct.Pin = GPIO_PIN_3 | GPIO_PIN_4;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF4_USART5;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
/*##-3- Configure the NVIC for UART ########################################*/
/* NVIC for USART */
HAL_NVIC_SetPriority(USART3_8_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(USART3_8_IRQn);
}
break;
case (uint32_t)USART6 :
{
/*##-1- Enable peripherals and GPIO Clocks #################################*/
/* Enable GPIO TX/RX clock */
__GPIOF_CLK_ENABLE();
/* To allow the IT source identification */
__SYSCFG_CLK_ENABLE();
/* Enable USARTx clock */
__USART6_CLK_ENABLE();
/*##-2- Configure peripheral GPIO ##########################################*/
/* UART TX GPIO pin configuration */
GPIO_InitStruct.Pin = GPIO_PIN_9 | GPIO_PIN_10;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF1_USART6;
HAL_GPIO_Init(GPIOF, &GPIO_InitStruct);
/*##-3- Configure the NVIC for UART ########################################*/
/* NVIC for USART */
HAL_NVIC_SetPriority(USART3_8_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(USART3_8_IRQn);
}
break;
case (uint32_t)USART7 :
{
/*##-1- Enable peripherals and GPIO Clocks #################################*/
/* Enable GPIO TX/RX clock */
__GPIOF_CLK_ENABLE();
/* To allow the IT source identification */
__SYSCFG_CLK_ENABLE();
/* Enable USARTx clock */
__USART7_CLK_ENABLE();
/*##-2- Configure peripheral GPIO ##########################################*/
/* UART TX GPIO pin configuration */
GPIO_InitStruct.Pin = GPIO_PIN_3 | GPIO_PIN_2;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF1_USART7;
HAL_GPIO_Init(GPIOF, &GPIO_InitStruct);
/*##-3- Configure the NVIC for UART ########################################*/
/* NVIC for USART */
HAL_NVIC_SetPriority(USART3_8_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(USART3_8_IRQn);
}
break;
case (uint32_t)USART8 :
{
/*##-1- Enable peripherals and GPIO Clocks #################################*/
/* Enable GPIO TX/RX clock */
__GPIOC_CLK_ENABLE();
/* To allow the IT source identification */
__SYSCFG_CLK_ENABLE();
/* Enable USARTx clock */
__USART8_CLK_ENABLE();
/*##-2- Configure peripheral GPIO ##########################################*/
/* UART TX GPIO pin configuration */
GPIO_InitStruct.Pin = GPIO_PIN_8 | GPIO_PIN_9;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF1_USART8;
HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
/*##-3- Configure the NVIC for UART ########################################*/
/* NVIC for USART */
HAL_NVIC_SetPriority(USART3_8_IRQn, 1, 0);
HAL_NVIC_EnableIRQ(USART3_8_IRQn);
}
break;
}
}
