FlagStatus USART_GetFlagStatus(USART_TypeDef* USARTx, uint16_t USART_FLAG)
{
FlagStatus bitstatus = RESET;
/* Check the parameters */
assert_param(IS_USART_ALL_PERIPH(USARTx));
assert_param(IS_USART_FLAG(USART_FLAG));
/* The CTS flag is not available for UART4 and UART5 */
if (USART_FLAG == USART_FLAG_CTS)
{
assert_param(IS_USART_1236_PERIPH(USARTx));
}
if ((USARTx->SR & USART_FLAG) != (uint16_t)RESET)
{
bitstatus = SET;
}
else
{
bitstatus = RESET;
}
return bitstatus;
}
void usart_setup(usart_dev *dev, uint32_t baudRate, uint16_t wordLength,
uint16_t stopBits, uint16_t parity, uint16_t mode,
uint16_t hardwareFlowControl, uint32_t tx_timeout)
{
/* Check the parameters */
assert_param(IS_USART_ALL_PERIPH(dev->USARTx));
assert_param(IS_USART_BAUDRATE(baud));
assert_param(IS_USART_STOPBITS(stopbits));
assert_param(IS_USART_PARITY(parity));
assert_param(IS_USART_WORD_LENGTH(wordLength));
assert_param(IS_USART_MODE(mode));
assert_param(IS_USART_HARDWARE_FLOW_CONTROL(hardwareFlowControl));
dev->tx_timeout = tx_timeout;
dev->txbusy = 0;
dev->usetxrb = 1;
dev->use_timeout = 0;
/* Disable USARTx */
USART_Cmd(dev->USARTx, DISABLE);
/* Enables the USART's 8x oversampling mode. */
USART_OverSampling8Cmd(dev->USARTx, ENABLE);
USART_ClockInitTypeDef USART_InitClock;
USART_ClockStructInit(&USART_InitClock);
USART_ClockInit(dev->USARTx, &USART_InitClock);
USART_InitTypeDef USART_config;
USART_StructInit(&USART_config);
USART_config.USART_BaudRate = baudRate;
USART_config.USART_WordLength = wordLength;
USART_config.USART_StopBits = stopBits;
USART_config.USART_Parity = parity;
USART_config.USART_Mode = mode;
USART_config.USART_HardwareFlowControl = hardwareFlowControl;
USART_Init(dev->USARTx, &USART_config);
NVIC_InitTypeDef NVIC_InitStructure;
/* Configure the NVIC Preemption Priority Bits */
//NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);
/* Enable the USART Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = dev->irq;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 3;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
USART_ITConfig(dev->USARTx, USART_IT_PE, DISABLE);
USART_ITConfig(dev->USARTx, USART_IT_IDLE, DISABLE);
USART_ITConfig(dev->USARTx, USART_IT_LBD, DISABLE);
if (IS_USART_1236_PERIPH(dev->USARTx))
USART_ITConfig(dev->USARTx, USART_IT_CTS, DISABLE);
USART_ITConfig(dev->USARTx, USART_IT_ERR, DISABLE);
/* Enable USART2 Rx request */
USART_ITConfig(dev->USARTx, USART_IT_RXNE, ENABLE);
USART_ClearFlag(dev->USARTx, USART_FLAG_RXNE);
USART_ITConfig(dev->USARTx, USART_IT_TC, DISABLE);
USART_ITConfig(dev->USARTx, USART_IT_TXE, ENABLE);
USART_ClearFlag(dev->USARTx, USART_FLAG_TC);
/*
USART_ITConfig(dev->USARTx, USART_IT_RXNE, ENABLE);
USART_ITConfig(dev->USARTx, USART_IT_PE, ENABLE);
USART_ITConfig(dev->USARTx, USART_IT_ERR, ENABLE);
*/
}
