void serial_free(serial_t *obj)
{
// Reset UART and disable clock
if (obj->uart == UART_1) {
__HAL_RCC_USART1_FORCE_RESET();
__HAL_RCC_USART1_RELEASE_RESET();
__HAL_RCC_USART1_CLK_DISABLE();
}
if (obj->uart == UART_2) {
__HAL_RCC_USART2_FORCE_RESET();
__HAL_RCC_USART2_RELEASE_RESET();
__HAL_RCC_USART2_CLK_DISABLE();
}
if (obj->uart == UART_3) {
__HAL_RCC_USART3_FORCE_RESET();
__HAL_RCC_USART3_RELEASE_RESET();
__HAL_RCC_USART3_CLK_DISABLE();
}
if (obj->uart == UART_4) {
__HAL_RCC_UART4_FORCE_RESET();
__HAL_RCC_UART4_RELEASE_RESET();
__HAL_RCC_UART4_CLK_DISABLE();
}
if (obj->uart == UART_5) {
__HAL_RCC_UART5_FORCE_RESET();
__HAL_RCC_UART5_RELEASE_RESET();
__HAL_RCC_UART5_CLK_DISABLE();
}
if (obj->uart == LPUART_1) {
__HAL_RCC_LPUART1_FORCE_RESET();
__HAL_RCC_LPUART1_RELEASE_RESET();
__HAL_RCC_LPUART1_CLK_DISABLE();
}
// Configure GPIOs
pin_function(obj->pin_tx, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
pin_function(obj->pin_rx, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
serial_irq_ids[obj->index] = 0;
}
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 (obj_s->uart) {
case UART_1:
__HAL_RCC_USART1_FORCE_RESET();
__HAL_RCC_USART1_RELEASE_RESET();
__HAL_RCC_USART1_CLK_ENABLE();
obj_s->index = 0;
break;
case UART_2:
__HAL_RCC_USART2_FORCE_RESET();
__HAL_RCC_USART2_RELEASE_RESET();
__HAL_RCC_USART2_CLK_ENABLE();
obj_s->index = 1;
break;
#if defined(USART3_BASE)
case UART_3:
__HAL_RCC_USART3_FORCE_RESET();
__HAL_RCC_USART3_RELEASE_RESET();
__HAL_RCC_USART3_CLK_ENABLE();
obj_s->index = 2;
break;
#endif
#if defined(UART4_BASE)
case UART_4:
__HAL_RCC_UART4_FORCE_RESET();
__HAL_RCC_UART4_RELEASE_RESET();
__HAL_RCC_UART4_CLK_ENABLE();
obj_s->index = 3;
break;
#endif
#if defined(UART5_BASE)
case UART_5:
__HAL_RCC_UART5_FORCE_RESET();
__HAL_RCC_UART5_RELEASE_RESET();
__HAL_RCC_UART5_CLK_ENABLE();
obj_s->index = 4;
break;
#endif
#if defined(USART6_BASE)
case UART_6:
__HAL_RCC_USART6_FORCE_RESET();
__HAL_RCC_USART6_RELEASE_RESET();
__HAL_RCC_USART6_CLK_ENABLE();
obj_s->index = 5;
break;
#endif
#if defined(UART7_BASE)
case UART_7:
__HAL_RCC_UART7_FORCE_RESET();
__HAL_RCC_UART7_RELEASE_RESET();
__HAL_RCC_UART7_CLK_ENABLE();
obj_s->index = 6;
break;
#endif
#if defined(UART8_BASE)
case UART_8:
__HAL_RCC_UART8_FORCE_RESET();
__HAL_RCC_UART8_RELEASE_RESET();
__HAL_RCC_UART8_CLK_ENABLE();
obj_s->index = 7;
break;
#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));
}
}
static void TM_USART_INT_Init(
USART_TypeDef* USARTx,
TM_USART_PinsPack_t pinspack,
uint32_t baudrate,
TM_USART_HardwareFlowControl_t FlowControl,
uint32_t Mode,
uint32_t Parity,
uint32_t StopBits,
uint32_t WordLength
) {
UART_HandleTypeDef UARTHandle;
IRQn_Type irq;
/*
* Initialize USARTx pins
* Set channel for USARTx NVIC
*/
#ifdef USART1
if (USARTx == USART1) {
/* Enable USART clock */
__HAL_RCC_USART1_CLK_ENABLE();
__HAL_RCC_USART1_FORCE_RESET();
__HAL_RCC_USART1_RELEASE_RESET();
/* Init pins */
TM_USART1_InitPins(pinspack);
/* Set IRQ channel */
irq = IRQ_USART1;
}
#endif
#ifdef USART2
if (USARTx == USART2) {
/* Enable USART clock */
__HAL_RCC_USART2_CLK_ENABLE();
__HAL_RCC_USART2_FORCE_RESET();
__HAL_RCC_USART2_RELEASE_RESET();
/* Init pins */
TM_USART2_InitPins(pinspack);
/* Set IRQ channel */
irq = IRQ_USART2;
}
#endif
#ifdef USART3
if (USARTx == USART3) {
/* Enable USART clock */
__HAL_RCC_USART3_CLK_ENABLE();
__HAL_RCC_USART3_FORCE_RESET();
__HAL_RCC_USART3_RELEASE_RESET();
/* Init pins */
TM_USART3_InitPins(pinspack);
/* Set IRQ channel */
irq = IRQ_USART3;
}
#endif
#ifdef UART4
if (USARTx == UART4) {
/* Enable UART clock */
__HAL_RCC_UART4_CLK_ENABLE();
__HAL_RCC_UART4_FORCE_RESET();
__HAL_RCC_UART4_RELEASE_RESET();
/* Init pins */
TM_UART4_InitPins(pinspack);
/* Set IRQ channel */
irq = IRQ_UART4;
}
#endif
#ifdef UART5
if (USARTx == UART5) {
/* Enable UART clock */
__HAL_RCC_UART5_CLK_ENABLE();
__HAL_RCC_UART5_FORCE_RESET();
__HAL_RCC_UART5_RELEASE_RESET();
/* Init pins */
TM_UART5_InitPins(pinspack);
/* Set IRQ channel */
irq = IRQ_UART5;
}
#endif
#ifdef USART6
if (USARTx == USART6) {
/* Enable UART clock */
__HAL_RCC_USART6_CLK_ENABLE();
__HAL_RCC_USART6_FORCE_RESET();
__HAL_RCC_USART6_RELEASE_RESET();
/* Init pins */
TM_USART6_InitPins(pinspack);
/* Set IRQ channel */
irq = IRQ_USART6;
}
#endif
#ifdef UART7
if (USARTx == UART7) {
/* Enable UART clock */
__HAL_RCC_UART7_CLK_ENABLE();
__HAL_RCC_UART7_FORCE_RESET();
__HAL_RCC_UART7_RELEASE_RESET();
/* Init pins */
TM_UART7_InitPins(pinspack);
/* Set IRQ channel */
irq = IRQ_UART7;
}
#endif
#ifdef UART8
if (USARTx == UART8) {
/* Enable UART clock */
__HAL_RCC_UART8_CLK_ENABLE();
__HAL_RCC_UART8_FORCE_RESET();
__HAL_RCC_UART8_RELEASE_RESET();
/* Init pins */
TM_UART8_InitPins(pinspack);
/* Set IRQ channel */
irq = IRQ_UART8;
}
#endif
/* STM32F0xx related */
#ifdef USART4
if (USARTx == USART4) {
/* Enable UART clock */
__HAL_RCC_USART4_CLK_ENABLE();
__HAL_RCC_USART4_FORCE_RESET();
__HAL_RCC_USART4_RELEASE_RESET();
/* Init pins */
TM_USART4_InitPins(pinspack);
/* Set IRQ channel */
irq = IRQ_USART4;
}
#endif
#ifdef USART5
if (USARTx == USART5) {
/* Enable UART clock */
__HAL_RCC_USART5_CLK_ENABLE();
__HAL_RCC_USART5_FORCE_RESET();
__HAL_RCC_USART5_RELEASE_RESET();
/* Init pins */
TM_USART5_InitPins(pinspack);
/* Set IRQ channel */
irq = IRQ_USART5;
}
#endif
#ifdef USART7
if (USARTx == USART7) {
/* Enable UART clock */
__HAL_RCC_USART7_CLK_ENABLE();
__HAL_RCC_USART7_FORCE_RESET();
__HAL_RCC_USART7_RELEASE_RESET();
/* Init pins */
TM_USART7_InitPins(pinspack);
/* Set IRQ channel */
irq = IRQ_USART7;
}
#endif
#ifdef USART8
if (USARTx == USART8) {
/* Enable UART clock */
__HAL_RCC_USART8_CLK_ENABLE();
__HAL_RCC_USART8_FORCE_RESET();
__HAL_RCC_USART8_RELEASE_RESET();
/* Init pins */
TM_USART8_InitPins(pinspack);
/* Set IRQ channel */
irq = IRQ_USART8;
}
#endif
/* Fill default settings */
UARTHandle.Instance = USARTx;
UARTHandle.Init.BaudRate = baudrate;
UARTHandle.Init.HwFlowCtl = FlowControl;
UARTHandle.Init.Mode = Mode;
UARTHandle.Init.Parity = Parity;
UARTHandle.Init.StopBits = StopBits;
UARTHandle.Init.WordLength = WordLength;
UARTHandle.Init.OverSampling = UART_OVERSAMPLING_16;
#if defined(STM32F0xx)
UARTHandle.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
#endif
/* Disable IRQ */
HAL_NVIC_DisableIRQ(irq);
/* Set priority */
HAL_NVIC_SetPriority(irq, USART_NVIC_PRIORITY, TM_USART_INT_GetSubPriority(USARTx));
/* Enable interrupt */
HAL_NVIC_EnableIRQ(irq);
/* Clear interrupt */
HAL_NVIC_ClearPendingIRQ(irq);
/* Init USART */
HAL_UART_Init(&UARTHandle);
/* Enable RX interrupt */
USARTx->CR1 |= USART_CR1_RXNEIE;
}
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 UART clock
if (obj->uart == UART_1) {
__HAL_RCC_USART1_FORCE_RESET();
__HAL_RCC_USART1_RELEASE_RESET();
__USART1_CLK_ENABLE();
obj->index = 0;
}
if (obj->uart == UART_2) {
__HAL_RCC_USART2_FORCE_RESET();
__HAL_RCC_USART2_RELEASE_RESET();
__USART2_CLK_ENABLE();
obj->index = 1;
}
if (obj->uart == UART_3) {
__HAL_RCC_USART3_FORCE_RESET();
__HAL_RCC_USART3_RELEASE_RESET();
__USART3_CLK_ENABLE();
obj->index = 2;
}
#if defined(UART4_BASE)
if (obj->uart == UART_4) {
__HAL_RCC_UART4_FORCE_RESET();
__HAL_RCC_UART4_RELEASE_RESET();
__UART4_CLK_ENABLE();
obj->index = 3;
}
#endif
#if defined(UART5_BASE)
if (obj->uart == UART_5) {
__HAL_RCC_UART5_FORCE_RESET();
__HAL_RCC_UART5_RELEASE_RESET();
__UART5_CLK_ENABLE();
obj->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->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));
}
}
void uart_deinit(pyb_uart_obj_t *self) {
self->is_enabled = false;
// Disable UART
self->uartx->CR1 &= ~USART_CR1_UE;
// Reset and turn off the UART peripheral
if (self->uart_id == 1) {
HAL_NVIC_DisableIRQ(USART1_IRQn);
__HAL_RCC_USART1_FORCE_RESET();
__HAL_RCC_USART1_RELEASE_RESET();
__HAL_RCC_USART1_CLK_DISABLE();
} else if (self->uart_id == 2) {
HAL_NVIC_DisableIRQ(USART2_IRQn);
__HAL_RCC_USART2_FORCE_RESET();
__HAL_RCC_USART2_RELEASE_RESET();
__HAL_RCC_USART2_CLK_DISABLE();
#if defined(USART3)
} else if (self->uart_id == 3) {
#if !defined(STM32F0)
HAL_NVIC_DisableIRQ(USART3_IRQn);
#endif
__HAL_RCC_USART3_FORCE_RESET();
__HAL_RCC_USART3_RELEASE_RESET();
__HAL_RCC_USART3_CLK_DISABLE();
#endif
#if defined(UART4)
} else if (self->uart_id == 4) {
HAL_NVIC_DisableIRQ(UART4_IRQn);
__HAL_RCC_UART4_FORCE_RESET();
__HAL_RCC_UART4_RELEASE_RESET();
__HAL_RCC_UART4_CLK_DISABLE();
#endif
#if defined(USART4)
} else if (self->uart_id == 4) {
__HAL_RCC_USART4_FORCE_RESET();
__HAL_RCC_USART4_RELEASE_RESET();
__HAL_RCC_USART4_CLK_DISABLE();
#endif
#if defined(UART5)
} else if (self->uart_id == 5) {
HAL_NVIC_DisableIRQ(UART5_IRQn);
__HAL_RCC_UART5_FORCE_RESET();
__HAL_RCC_UART5_RELEASE_RESET();
__HAL_RCC_UART5_CLK_DISABLE();
#endif
#if defined(USART5)
} else if (self->uart_id == 5) {
__HAL_RCC_USART5_FORCE_RESET();
__HAL_RCC_USART5_RELEASE_RESET();
__HAL_RCC_USART5_CLK_DISABLE();
#endif
#if defined(UART6)
} else if (self->uart_id == 6) {
HAL_NVIC_DisableIRQ(USART6_IRQn);
__HAL_RCC_USART6_FORCE_RESET();
__HAL_RCC_USART6_RELEASE_RESET();
__HAL_RCC_USART6_CLK_DISABLE();
#endif
#if defined(UART7)
} else if (self->uart_id == 7) {
HAL_NVIC_DisableIRQ(UART7_IRQn);
__HAL_RCC_UART7_FORCE_RESET();
__HAL_RCC_UART7_RELEASE_RESET();
__HAL_RCC_UART7_CLK_DISABLE();
#endif
#if defined(USART7)
} else if (self->uart_id == 7) {
__HAL_RCC_USART7_FORCE_RESET();
__HAL_RCC_USART7_RELEASE_RESET();
__HAL_RCC_USART7_CLK_DISABLE();
#endif
#if defined(UART8)
} else if (self->uart_id == 8) {
HAL_NVIC_DisableIRQ(UART8_IRQn);
__HAL_RCC_UART8_FORCE_RESET();
__HAL_RCC_UART8_RELEASE_RESET();
__HAL_RCC_UART8_CLK_DISABLE();
#endif
#if defined(USART8)
} else if (self->uart_id == 8) {
__HAL_RCC_USART8_FORCE_RESET();
__HAL_RCC_USART8_RELEASE_RESET();
__HAL_RCC_USART8_CLK_DISABLE();
#endif
#if defined(UART9)
} else if (self->uart_id == 9) {
HAL_NVIC_DisableIRQ(UART9_IRQn);
__HAL_RCC_UART9_FORCE_RESET();
__HAL_RCC_UART9_RELEASE_RESET();
__HAL_RCC_UART9_CLK_DISABLE();
#endif
#if defined(UART10)
} else if (self->uart_id == 10) {
HAL_NVIC_DisableIRQ(UART10_IRQn);
__HAL_RCC_UART10_FORCE_RESET();
__HAL_RCC_UART10_RELEASE_RESET();
__HAL_RCC_UART10_CLK_DISABLE();
#endif
}
}
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
UARTName instance = (UARTName)pinmap_merge(uart_tx, uart_rx);
MBED_ASSERT(instance != (UARTName)NC);
// Enable USART clock
switch (instance) {
case UART_1:
__HAL_RCC_USART1_FORCE_RESET();
__HAL_RCC_USART1_RELEASE_RESET();
__HAL_RCC_USART1_CLK_ENABLE();
SERIAL_OBJ(index) = 0;
#if DEVICE_SERIAL_ASYNCH_DMA
__HAL_RCC_DMA2_CLK_ENABLE();
#endif
break;
case UART_2:
__HAL_RCC_USART2_FORCE_RESET();
__HAL_RCC_USART2_RELEASE_RESET();
__HAL_RCC_USART2_CLK_ENABLE();
SERIAL_OBJ(index) = 1;
#if DEVICE_SERIAL_ASYNCH_DMA
__HAL_RCC_DMA1_CLK_ENABLE();
#endif
break;
#if defined(USART3_BASE)
case UART_3:
__HAL_RCC_USART3_FORCE_RESET();
__HAL_RCC_USART3_RELEASE_RESET();
__HAL_RCC_USART3_CLK_ENABLE();
SERIAL_OBJ(index) = 2;
#if DEVICE_SERIAL_ASYNCH_DMA
__HAL_RCC_DMA1_CLK_ENABLE();
#endif
break;
#endif
#if defined(UART4_BASE)
case UART_4:
__HAL_RCC_UART4_FORCE_RESET();
__HAL_RCC_UART4_RELEASE_RESET();
__HAL_RCC_UART4_CLK_ENABLE();
SERIAL_OBJ(index) = 3;
#if DEVICE_SERIAL_ASYNCH_DMA
__HAL_RCC_DMA1_CLK_ENABLE();
#endif
break;
#endif
#if defined(UART5_BASE)
case UART_5:
__HAL_RCC_UART5_FORCE_RESET();
__HAL_RCC_UART5_RELEASE_RESET();
__HAL_RCC_UART5_CLK_ENABLE();
SERIAL_OBJ(index) = 4;
#if DEVICE_SERIAL_ASYNCH_DMA
__HAL_RCC_DMA1_CLK_ENABLE();
#endif
break;
#endif
#if defined(USART6_BASE)
case UART_6:
__HAL_RCC_USART6_FORCE_RESET();
__HAL_RCC_USART6_RELEASE_RESET();
__HAL_RCC_USART6_CLK_ENABLE();
SERIAL_OBJ(index) = 5;
#if DEVICE_SERIAL_ASYNCH_DMA
__HAL_RCC_DMA2_CLK_ENABLE();
#endif
break;
#endif
#if defined(UART7_BASE)
case UART_7:
__HAL_RCC_UART7_FORCE_RESET();
__HAL_RCC_UART7_RELEASE_RESET();
__HAL_RCC_UART7_CLK_ENABLE();
SERIAL_OBJ(index) = 6;
#if DEVICE_SERIAL_ASYNCH_DMA
__HAL_RCC_DMA1_CLK_ENABLE();
#endif
break;
#endif
#if defined(UART8_BASE)
case UART_8:
__HAL_RCC_UART8_FORCE_RESET();
__HAL_RCC_UART8_RELEASE_RESET();
__HAL_RCC_UART8_CLK_ENABLE();
SERIAL_OBJ(index) = 7;
#if DEVICE_SERIAL_ASYNCH_DMA
__HAL_RCC_DMA1_CLK_ENABLE();
#endif
break;
#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
SERIAL_OBJ(baudrate) = 9600;
SERIAL_OBJ(databits) = UART_WORDLENGTH_8B;
SERIAL_OBJ(stopbits) = UART_STOPBITS_1;
SERIAL_OBJ(parity) = UART_PARITY_NONE;
SERIAL_OBJ(pin_tx) = tx;
SERIAL_OBJ(pin_rx) = rx;
init_uart(obj, instance);
#ifndef YOTTA_CFG_MBED_OS
// For stdio management
if ((int)(UartHandle[SERIAL_OBJ(index)].Instance) == STDIO_UART) {
stdio_uart_inited = 1;
memcpy(&stdio_uart, obj, sizeof(serial_t));
}
#endif
DEBUG_PRINTF("UART%u: Init\n", obj->serial.module+1);
}
