/** Handle the serial tx interrupt
*
* @param obj_s The serial object
* @return Returns the status
*/
static gd_status_enum usart_tx_interrupt(struct serial_s *obj_s)
{
uint16_t *temp;
if (obj_s->tx_state == OP_STATE_BUSY_TX) {
if (obj_s->databits == USART_WL_9BIT) {
temp = (uint16_t *) obj_s->tx_buffer_ptr;
USART_DATA(obj_s->uart) = (uint16_t)(*temp & (uint16_t)0x01FF);
if (obj_s->parity == USART_PM_NONE) {
obj_s->tx_buffer_ptr += 2U;
} else {
obj_s->tx_buffer_ptr += 1U;
}
} else {
USART_DATA(obj_s->uart) = (uint8_t)(*obj_s->tx_buffer_ptr++ & (uint8_t)0x00FF);
}
if (--obj_s->tx_count == 0U) {
/* disable USART_INT_TBE interrupt */
usart_interrupt_disable(obj_s->uart, USART_INT_TBE);
/* enable USART_INT_TC interrupt */
usart_interrupt_enable(obj_s->uart, USART_INT_TC);
}
return GD_OK;
} else {
return GD_BUSY;
}
}
static rt_err_t gd32_control(struct rt_serial_device *serial, int cmd, void *arg)
{
struct gd32_uart *uart;
RT_ASSERT(serial != RT_NULL);
uart = (struct gd32_uart *)serial->parent.user_data;
switch (cmd)
{
case RT_DEVICE_CTRL_CLR_INT:
/* disable rx irq */
NVIC_DisableIRQ(uart->irqn);
/* disable interrupt */
usart_interrupt_disable(uart->uart_periph, USART_INT_RBNE);
break;
case RT_DEVICE_CTRL_SET_INT:
/* enable rx irq */
NVIC_EnableIRQ(uart->irqn);
/* enable interrupt */
usart_interrupt_enable(uart->uart_periph, USART_INT_RBNE);
break;
}
return RT_EOK;
}
/** Configure serial interrupt. This function is used for word-approach
*
* @param obj The serial object
* @param irq The serial IRQ type (RX or TX)
* @param enable Set to non-zero to enable events, or zero to disable them
*/
void serial_irq_set(serial_t *obj, SerialIrq irq, uint32_t enable)
{
struct serial_s *p_obj = GET_SERIAL_S(obj);
IRQn_Type irq_n = (IRQn_Type)0;
uint32_t vector = 0;
if (p_obj->uart == USART0) {
irq_n = USART0_IRQn;
vector = (uint32_t)&usart0_irq;
} else if (p_obj->uart == USART1) {
irq_n = USART1_IRQn;
vector = (uint32_t)&usart1_irq;
} else if (p_obj->uart == USART2) {
irq_n = USART2_IRQn;
vector = (uint32_t)&usart2_irq;
} else if (p_obj->uart == UART3) {
irq_n = UART3_IRQn;
vector = (uint32_t)&uart3_irq;
} else if (p_obj->uart == UART4) {
irq_n = UART4_IRQn;
vector = (uint32_t)&uart4_irq;
}
if (enable) {
if (irq == RxIrq) {
/* Rx IRQ */
usart_interrupt_enable(p_obj->uart, USART_INT_RBNE);
} else {
/* Tx IRQ */
usart_interrupt_enable(p_obj->uart, USART_INT_TBE);
}
NVIC_SetVector(irq_n, vector);
NVIC_EnableIRQ(irq_n);
} else {
if (irq == RxIrq) {
/* Rx IRQ */
usart_interrupt_disable(p_obj->uart, USART_INT_RBNE);
} else {
/* Tx IRQ */
usart_interrupt_disable(p_obj->uart, USART_INT_TBE);
}
}
}
/**
* Preprocess the USART rx interrupt
*
* @param obj_s The serial object
* @param pData Pointer to rx buffer
* @param Size Size of rx buffer
* @return Returns the status
*/
static gd_status_enum usart_rx_interrupt_preprocess(struct serial_s *obj_s, uint8_t *pData, uint16_t Size)
{
if (obj_s->rx_state == OP_STATE_READY) {
if ((pData == NULL) || (Size == 0U)) {
return GD_ERROR;
}
obj_s->rx_buffer_ptr = pData;
obj_s->rx_size = Size;
obj_s->rx_count = Size;
obj_s->error_code = USART_ERROR_CODE_NONE;
obj_s->rx_state = OP_STATE_BUSY_RX;
usart_interrupt_enable(obj_s->uart, USART_INT_PERR);
usart_interrupt_enable(obj_s->uart, USART_INT_ERR);
usart_interrupt_enable(obj_s->uart, USART_INT_RBNE);
return GD_OK;
} else {
return GD_BUSY;
}
}
