void uart_setCallbacks(uart_tx_cbt txCb, uart_rx_cbt rxCb)
{
uart_vars.txCb = txCb;
uart_vars.rxCb = rxCb;
//enable nvic uart.
NVIC_uart();
}
void uart_init() {
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
// reset local variables
memset(&uart_vars,0,sizeof(uart_vars_t));
// enable GPIO and USART clock
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_AFIO, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);
// configure USART TX pin as alternate function push-pull
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
// configure USART RX as input floating
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_Init(GPIOA, &GPIO_InitStructure);
USART_InitStructure.USART_BaudRate = 115200;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_Parity = USART_Parity_No;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
USART_Init(USART1, &USART_InitStructure);
// make sure no interrupts fire as we enable the UART
uart_clearTxInterrupts();
uart_clearRxInterrupts();
// enable USART1
USART_Cmd(USART1, ENABLE);
// enable NVIC uart
NVIC_uart();
}
