void setup_usart(void) {
// enable clocks for usart2
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);
// Setup Alternate Functions to get usart2 out on PA2/PA3...
GPIO_InitTypeDef usart_af;
usart_af.GPIO_Pin = GPIO_Pin_2 | GPIO_Pin_3;
usart_af.GPIO_Mode = GPIO_Mode_AF;
GPIO_Init(GPIOA, &usart_af);
GPIO_PinAFConfig(GPIOA, GPIO_PinSource2, GPIO_AF_USART2);
GPIO_PinAFConfig(GPIOA, GPIO_PinSource3, GPIO_AF_USART2);
USART_ClockInitTypeDef usart_clocks;
USART_ClockStructInit(&usart_clocks);
usart_clocks.USART_Clock = USART_Clock_Enable;
USART_ClockInit(USART2, &usart_clocks);
USART_InitTypeDef usart_init;
usart_init.USART_BaudRate = 57600;
usart_init.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
usart_init.USART_StopBits = USART_StopBits_1;
usart_init.USART_Parity = USART_Parity_No;
usart_init.USART_WordLength = USART_WordLength_8b;
usart_init.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
USART_Init(USART2, &usart_init);
USART_Cmd(USART2, ENABLE);
}
void init_SCI(USART_TypeDef* USARTx,
uint32_t USART_BaudRate,
uint16_t USART_WordLength,
uint16_t USART_StopBits,
uint16_t USART_Parity,
uint16_t USART_Mode,
uint16_t USART_HardwareFlowControl)
{
static uint16_t usartDeInitFlag=0;
USART_InitTypeDef USART_InitStructure; //setup UART_InitStructure
USART_ClockInitTypeDef USART_ClockInitStructure; //setup UART_ClockInitStructure
USART_ClockStructInit(&USART_ClockInitStructure);
if (usartDeInitFlag==0)
{
USART_DeInit(USARTx); //Deinit USARTx
usartDeInitFlag=1;
}
USART_InitStructure.USART_BaudRate = USART_BaudRate;
USART_InitStructure.USART_WordLength = USART_WordLength;
USART_InitStructure.USART_StopBits = USART_StopBits;
USART_InitStructure.USART_Parity = USART_Parity;
USART_InitStructure.USART_Mode = USART_Mode;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl;
USART_Init(USARTx, &USART_InitStructure);
USART_ClockInit(USARTx, &USART_ClockInitStructure);
USART_Cmd(USARTx, ENABLE);
}
void Usart4Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
USART_ClockInitTypeDef USART_ClockInitStructure;
//Set USART2 Tx (PA.02) as AF push-pull
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOC, &GPIO_InitStructure);
//Set USART2 Rx (PA.03) as input floating
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
GPIO_Init(GPIOC, &GPIO_InitStructure);
USART_ClockStructInit(&USART_ClockInitStructure);
USART_ClockInit(UART4, &USART_ClockInitStructure);
USART_InitStructure.USART_BaudRate = 9600;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_Parity = USART_Parity_No ;
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
//Write USART2 parameters
USART_Init(UART4, &USART_InitStructure);
//Enable UART4 Receive interrupt
USART_ITConfig(UART4, USART_IT_RXNE, ENABLE);
//Enable USART2
USART_Cmd(UART4, ENABLE);
}
void BoardConsoleInit() {
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 | RCC_APB2Periph_GPIOA | RCC_APB2Periph_AFIO, ENABLE);
GPIO_InitTypeDef gpiodef;
gpiodef.GPIO_Pin = GPIO_Pin_9;
gpiodef.GPIO_Mode = GPIO_Mode_AF_PP;
gpiodef.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &gpiodef);
gpiodef.GPIO_Pin = GPIO_Pin_10;
gpiodef.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOA, &gpiodef);
USART_InitTypeDef usartdef;
usartdef.USART_BaudRate = 115200;
usartdef.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
usartdef.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
usartdef.USART_WordLength = USART_WordLength_8b;
usartdef.USART_StopBits = USART_StopBits_1;
usartdef.USART_Parity = USART_Parity_No;
USART_Init(USART1, &usartdef);
USART_ClockInitTypeDef clockdef;
USART_ClockStructInit(&clockdef);
USART_ClockInit(USART1, &clockdef);
USART_Cmd(USART1, ENABLE);
}
void USART3_Config(void) {
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, ENABLE);
USART_ClockInitTypeDef USART_ClockInitStructure;
GPIO_InitTypeDef UARTTX;
UARTTX.GPIO_Pin = GPIO_Pin_10;
UARTTX.GPIO_Mode = GPIO_Mode_AF_PP;
UARTTX.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitTypeDef UARTRX;
UARTRX.GPIO_Pin = GPIO_Pin_11;
UARTRX.GPIO_Mode = GPIO_Mode_IPU;
UARTRX.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &UARTTX);
GPIO_Init(GPIOB, &UARTRX);
USART_ClockStructInit(&USART_ClockInitStructure);
USART_ClockInit(USART3, &USART_ClockInitStructure);
USART_InitTypeDef UART3;
UART3.USART_BaudRate = 9600;
UART3.USART_WordLength = USART_WordLength_8b;
UART3.USART_StopBits = USART_StopBits_1;
UART3.USART_Parity = USART_Parity_No;
UART3.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
UART3.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
USART_Init(USART3, &UART3);
USART_Cmd(USART3, ENABLE);
USART3_NVIC_Configuration();
}
void UsartInit(USART_TypeDef *USART) {
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
USART_ClockInitTypeDef USART_ClockInitStructure;
if (USART == USART1) {
//Enable bus clocks
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 | RCC_APB2Periph_GPIOA | RCC_APB2Periph_AFIO, ENABLE);
//Set USART1 Tx (PA.09) as AF push-pull
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
//Set USART1 Rx (PA.10) as input floating
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOA, &GPIO_InitStructure);
} else if (USART == USART2) {
//Enable bus clocks
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_AFIO, ENABLE);
//Set USART2 Tx (PA.02) as AF push-pull
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
//Set USART1 Rx (PA.3) as input floating
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOA, &GPIO_InitStructure);
} else {
//Enable bus clocks
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB | RCC_APB2Periph_AFIO, ENABLE);
//Set USART1 Tx (PB.10) as AF push-pull
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
//Set USART1 Rx (PB.11) as input floating
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOA, &GPIO_InitStructure);
}
//Set USART paramenhs
USART_ClockStructInit(&USART_ClockInitStructure);
USART_InitStructure.USART_BaudRate = 9600;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_Parity = USART_Parity_No ;
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_ClockInit(USART1, &USART_ClockInitStructure);
//Write USART1 parameters
USART_Init(USART1, &USART_InitStructure);
//Enable USART1
USART_Cmd(USART1, ENABLE);
}
void usart_setup(const usart_dev *dev, uint32_t baudRate, uint16_t wordLength,
uint16_t stopBits, uint16_t parity, uint16_t mode, uint16_t hardwareFlowControl)
{
/* 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));
memset(dev->state, 0, sizeof(*dev->state));
dev->state->txbusy = 0;
dev->state->callback = 0;
/* Disable USARTx */
usart_disable(dev);
rb_init(dev->txrb, USART_TX_BUF_SIZE, dev->state->tx_buf);
rb_init(dev->rxrb, USART_RX_BUF_SIZE, dev->state->rx_buf);
/* 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);
dev->USARTx->CR1 &= ~(USART_MASK_IDLEIE | USART_MASK_RXNEIE | USART_MASK_TCEIE | USART_MASK_TXEIE | USART_MASK_PEIE);
dev->USARTx->CR2 &= ~(USART_MASK2_LBDIE);
dev->USARTx->CR3 &= ~(USART_MASK3_CTSIE | USART_MASK3_EIE);
if(mode & USART_Mode_Rx) { /* Enable Rx request */
USART_ClearFlag(dev->USARTx, USART_FLAG_RXNE);
dev->USARTx->CR1 |= USART_MASK_RXNEIE;
}
if(mode & USART_Mode_Tx) {
USART_ClearFlag(dev->USARTx, USART_FLAG_TC);
}
enable_nvic_irq(dev->irq, UART_INT_PRIORITY);
}
void usart1_init()
{
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 | RCC_APB2Periph_GPIOA | RCC_APB2Periph_AFIO, ENABLE);
GPIO_Init(GPIOA, (GPIO_InitTypeDef*) &usart_tx);
GPIO_Init(GPIOA, (GPIO_InitTypeDef*) &usart_rx);
USART_ClockStructInit(&USART_ClockInitStructure);
USART_ClockInit(USART1, &USART_ClockInitStructure);
USART_Init(USART1, &usart1);
USART_Cmd(USART1, ENABLE);
}
int main(void) {
int i = 10;
GPIO_InitTypeDef gpio_init;
USART_InitTypeDef usart_init;
USART_ClockInitTypeDef usart_clk_init;
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);
// PA9 = Tx, PA10 = Rx
gpio_init.GPIO_Pin = GPIO_Pin_9 | GPIO_Pin_10;
gpio_init.GPIO_Mode = GPIO_Mode_AF;
gpio_init.GPIO_Speed = GPIO_Speed_40MHz;
gpio_init.GPIO_OType = GPIO_OType_PP;
gpio_init.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(GPIOA, &gpio_init);
GPIO_PinAFConfig(GPIOA, GPIO_PinSource9, GPIO_AF_USART1);
GPIO_PinAFConfig(GPIOA, GPIO_PinSource10, GPIO_AF_USART1);
USART_ClockStructInit(&usart_clk_init);
USART_ClockInit(USART1, &usart_clk_init);
usart_init.USART_BaudRate = 9600;
usart_init.USART_WordLength = USART_WordLength_8b;
usart_init.USART_StopBits = USART_StopBits_1;
usart_init.USART_Parity = USART_Parity_No ;
usart_init.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
usart_init.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_Init(USART1, &usart_init);
USART_Cmd(USART1,ENABLE);
while(USART_GetFlagStatus(USART1, USART_FLAG_TC) == RESET) {}
while (1) {
if ( usart_available() ) // data available
{
usart_print( "Data Available: " );
uint8_t ch = usart_read();
usart_write(ch);
usart_print( "\r\n" );
}
}
return 0;
}
int main(void)
{
RCC_GetClocksFreq(&RCC_Clocks);
SysTick_Config(RCC_Clocks.HCLK_Frequency / 1000);
GPIO_InitTypeDef gpio_init;
USART_InitTypeDef usart_init;
USART_ClockInitTypeDef usart_clk_init;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);
// PA2 = Tx, PA3 = Rx
gpio_init.GPIO_Pin = GPIO_Pin_2 | GPIO_Pin_3;
gpio_init.GPIO_Mode = GPIO_Mode_AF_PP;
gpio_init.GPIO_Speed = GPIO_Speed_10MHz;
GPIO_Init(GPIOA, &gpio_init);
gpio_init.GPIO_Pin = GPIO_Pin_5;
gpio_init.GPIO_Mode = GPIO_Mode_Out_PP;
gpio_init.GPIO_Speed = GPIO_Speed_10MHz;
GPIO_Init(GPIOA, &gpio_init);
GPIO_PinRemapConfig(GPIO_Remap_USART2, ENABLE);
GPIO_PinRemapConfig(GPIO_Remap_USART2, ENABLE);
USART_ClockStructInit(&usart_clk_init);
USART_ClockInit(USART2, &usart_clk_init);
usart_init.USART_BaudRate = 9600;
usart_init.USART_WordLength = USART_WordLength_8b;
usart_init.USART_StopBits = USART_StopBits_1;
usart_init.USART_Parity = USART_Parity_No ;
usart_init.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
usart_init.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_Init(USART2, &usart_init);
USART_Cmd(USART2,ENABLE);
while(USART_GetFlagStatus(USART2, USART_FLAG_TC) == RESET) {}
while (1)
{
usart_print( "UART Example" );
// toggle led
GPIOA->ODR ^= GPIO_Pin_5;
Delay(500);
}
}
////////////////////////////////////////////////////硬件平台初始化
void UART1_HardwareInit(u32 baudRate)
{
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
USART_ClockInitTypeDef USART_ClockInitStruct;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);
RCC_APB2PeriphClockCmd(UART1_RCC_APB2Periph, ENABLE); //使能GPIO
GPIO_InitStructure.GPIO_Pin = UART1_Tx_Pin;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(UART1_Port, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = UART1_Rx_Pin;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
GPIO_Init(UART1_Port, &GPIO_InitStructure);
USART_InitStructure.USART_BaudRate = baudRate;//波特率设置
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);
USART_ClockStructInit(&USART_ClockInitStruct); //之前没有填入缺省值，是不行的
USART_ClockInit(USART1, &USART_ClockInitStruct);
// Configure one bit for preemption priority
NVIC_PriorityGroupConfig(Devices_PriorityGroup);
NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = UART1_PreemptionPriority;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = UART1_SubPriority;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
USART_ITConfig(USART1, USART_IT_RXNE, ENABLE); //使能中断
USART_Cmd(USART1, ENABLE);
//装载发送中断
UART1_SetTxISRFunc(UART1_TxDequeue); //存入发送队列
//装载接收中断
UART1_SetRxISRFunc(UART1_RxData); //存入接收队列
}
// ============================================================================
void vUSART2_Init( void ) {
USART_ClockInitTypeDef USART_ClockInitStruct;
USART_InitTypeDef USART_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
// Enable needed clocks for uart.
RCC_APB1PeriphClockCmd( RCC_APB1Periph_USART2, ENABLE );
RCC_AHB1PeriphClockCmd( RCC_AHB1Periph_GPIOA, ENABLE );
// Make sure you use 'GPIO_PinSource2' and NOT 'GPIO_Pin_2'. Using the
// latter will not work!
GPIO_PinAFConfig( GPIOA, GPIO_PinSource2, GPIO_AF_USART2 );
GPIO_PinAFConfig( GPIOA, GPIO_PinSource3, GPIO_AF_USART2 );
// Setup Tx / Rx pins.
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2; // Tx Pin
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_Init( GPIOA, &GPIO_InitStructure );
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3; // Rx Pin
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_Init( GPIOA, &GPIO_InitStructure );
// Make sure syncro clock is turned off.
USART_ClockStructInit( &USART_ClockInitStruct );
USART_ClockInit( USART2, &USART_ClockInitStruct );
// Setup transmit complete irq.
USART_ITConfig( USART2, USART_IT_TC, ENABLE );
// Use defaults (except baud rate).
USART_StructInit( &USART_InitStructure );
USART_InitStructure.USART_BaudRate = 115200;
USART_Init( USART2, &USART_InitStructure );
USART_Cmd( USART2, ENABLE );
// Enable USART2 interrupt.
/*
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
*/
}
void Usart1Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
USART_ClockInitTypeDef USART_ClockInitStructure;
//enable bus clocks
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 | RCC_APB2Periph_GPIOA | RCC_APB2Periph_AFIO, ENABLE);
//Set USART1 Tx (PA.09) as AF push-pull
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
//Set USART1 Rx (PA.10) as input floating
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOA, &GPIO_InitStructure);
USART_ClockStructInit(&USART_ClockInitStructure);
USART_ClockInit(USART1, &USART_ClockInitStructure);
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_Mode = USART_Mode_Rx | USART_Mode_Tx;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
//Write USART1 parameters
USART_Init(USART1, &USART_InitStructure);
//Enable USART1
USART_Cmd(USART1, ENABLE);
}
/*******************************************************************************************************************************
* 函数名 ：DC_USART_Conf
* 参数 ：void
* 返回值 ：void
* 功能 ：配置USART6，并初始化
*******************************************************************************************************************************/
void DC_USART_Conf(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
USART_ClockInitTypeDef USART_ClockInitStruct;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART6, ENABLE); //开启USART6时钟
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC, ENABLE); //开启GPIOC时钟
GPIO_PinAFConfig(GPIOC, GPIO_PinSource6, GPIO_AF_USART6);//
GPIO_PinAFConfig(GPIOC, GPIO_PinSource7, GPIO_AF_USART6);//
/*配置GPIOC*/
/*配置GPIOC_Pin7为TX输入*/
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_InitStructure.GPIO_Pin=GPIO_Pin_7;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOC,&GPIO_InitStructure);
/*配置GPIOC_Pin6为RX输出*/
GPIO_InitStructure.GPIO_Pin=GPIO_Pin_6;
GPIO_InitStructure.GPIO_Mode=GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOC,&GPIO_InitStructure);
/*配置USART6*/
USART_StructInit(&USART_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(USART6, &USART_InitStructure);
USART_ClockStructInit(&USART_ClockInitStruct);
USART_ClockInit(USART6, &USART_ClockInitStruct);
// USART_ITConfig(USART6, USART_IT_RXNE, ENABLE); //使能 USART6中断
USART_Cmd(USART6, ENABLE); //使能 USART6
USART_ClearFlag(USART6, USART_FLAG_TC); /* 清发送完成标志，Transmission Complete flag */
}
void USART2_Init( void ) {
USART_ClockInitTypeDef USART_ClockInitStruct;
USART_InitTypeDef USART_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB1PeriphClockCmd( RCC_APB1Periph_USART2, ENABLE );
RCC_AHB1PeriphClockCmd( RCC_AHB1Periph_GPIOA, ENABLE );
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3; // Rx Pin
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_Init(GPIOA, &GPIO_InitStructure);
// Make sure you use 'GPIO_PinSource2' and NOT 'GPIO_Pin_2'. Using the
// latter will not work!
GPIO_PinAFConfig( GPIOA, GPIO_PinSource2, GPIO_AF_USART2 );
GPIO_PinAFConfig( GPIOA, GPIO_PinSource3, GPIO_AF_USART2 );
// Make sure syncro clock is turned off.
USART_ClockStructInit( &USART_ClockInitStruct );
USART_ClockInit( USART2, &USART_ClockInitStruct );
USART_StructInit( &USART_InitStructure );
// Initialize USART
USART_InitStructure.USART_BaudRate = 256000*8;
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_Tx;
USART_Init( USART2, &USART_InitStructure );
//USART2->BRR = 364;
USART_Cmd( USART2, ENABLE );
}
/*******************************************************************************
* Function Name : UART3_Configuration
* Description : UART3 配置（用于485通信，可根据需要修改波特率）
* Input : None
* Output : None
* Return : None
*******************************************************************************/
void USART3_Configuration(void)
{
USART_InitTypeDef USART_InitStructure;
USART_ClockInitTypeDef USART_ClockInitStructure;
USART_InitStructure.USART_BaudRate = 9600;
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;
/* Configure the USART3 */
USART_Init(USART3, &USART_InitStructure);
USART_ClockInitStructure.USART_Clock = USART_Clock_Disable;
USART_ClockInitStructure.USART_CPOL = USART_CPOL_Low;
USART_ClockInitStructure.USART_CPHA = USART_CPHA_2Edge;
USART_ClockInitStructure.USART_LastBit = USART_LastBit_Disable;
USART_ClockStructInit(&USART_ClockInitStructure);
}
int uart_init(USART_TypeDef* USARTx, uint32_t baud, uint32_t flags) {
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
if (USARTx == USART1) {
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);
GPIO_StructInit(&GPIO_InitStructure);
if (flags & USART_Mode_Tx) {
// UART1_Tx
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
}
if (flags & USART_Mode_Rx) {
// UART1_Rx
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
}
}
USART_InitTypeDef USART_InitStructure;
USART_ClockInitTypeDef USART_ClockInitStructure;
USART_StructInit(&USART_InitStructure);
USART_ClockStructInit(&USART_ClockInitStructure);
USART_ClockInit(USARTx, &USART_ClockInitStructure);
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_BaudRate = baud;
USART_InitStructure.USART_Mode = flags;
USART_Init(USARTx, &USART_InitStructure);
USART_Cmd(USARTx, ENABLE);
}
void Usart4Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
USART_ClockInitTypeDef USART_ClockInitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_UART4, ENABLE);
//Set USART4 Tx (PC10) as AF push-pull
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOC, &GPIO_InitStructure);
//Set USART4 Rx (PC11) as input pull down
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPD;
GPIO_Init(GPIOC, &GPIO_InitStructure);
USART_ClockStructInit(&USART_ClockInitStructure);
USART_ClockInit(UART4, &USART_ClockInitStructure);
//USART_InitStructure.USART_BaudRate = 9600;
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_Mode = USART_Mode_Rx | USART_Mode_Tx;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_Init(UART4, &USART_InitStructure);
//Enable UART4 Receive interrupt
USART_ITConfig(UART4, USART_IT_RXNE, ENABLE);
//Enable USART4
USART_Cmd(UART4, ENABLE);
InitUart4Buffer();
InitUart4BufferIRQ();
}
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);
*/
}
void UsartInit ()
{
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
USART_ClockInitTypeDef USART_ClockInitStructure;
// Enable APB2 bus clock
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC | RCC_APB2Periph_AFIO, ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, ENABLE);
DelayUSART(2);
//Set USART1 Tx (PB.10) as AF push-pull --> PC10
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOC, &GPIO_InitStructure);
//Set USART1 Rx (PB.11) as input floating --> PC11
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOC, &GPIO_InitStructure);
USART_ClockStructInit(&USART_ClockInitStructure);
USART_ClockInit(USART3, &USART_ClockInitStructure);
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_Mode = USART_Mode_Rx | USART_Mode_Tx;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
//Write USART3 parameters
USART_Init(USART3, &USART_InitStructure);
//Enable USART3
USART_Cmd(USART3, ENABLE);
//configure NVIC
NVIC_InitTypeDef NVIC_InitStructure;
//select NVIC channel to configure
NVIC_InitStructure.NVIC_IRQChannel = USART3_IRQn;
//set priority to lowest
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x0F;
//set subpriority to lowest
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x0F;
//enable IRQ channel
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
//update NVIC registers
NVIC_Init(&NVIC_InitStructure);
//disable Transmit Data Register empty interrupt
// USART_ITConfig(USART3, USART_IT_TXE, DISABLE); // proveri!
//enable Receive Data register not empty interrupt
USART_ITConfig(USART3, USART_IT_RXNE, ENABLE);
USART_ITConfig(USART3, USART_IT_TC, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; // konfiguracija za alternativnu funkciju - Push Pull
GPIO_Init( GPIOC, &GPIO_InitStructure );
GPIO_ResetBits(GPIOC,GPIO_Pin_12);
GPIO_PinRemapConfig(GPIO_PartialRemap_USART3, ENABLE);
}
void initUart() {
RCC_APB2PeriphClockCmd(
RCC_APB2Periph_USART1 | RCC_APB2Periph_GPIOA | RCC_APB2Periph_AFIO,
ENABLE);
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_StructInit(&GPIO_InitStructure);
// Transmit pin.
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9,
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(GPIOA, &GPIO_InitStructure);
// Receive pin.
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOA, &GPIO_InitStructure);
// Default clock structure works for us.
USART_ClockInitTypeDef USART_ClockInitStructure;
USART_ClockStructInit(&USART_ClockInitStructure);
USART_ClockInit(USART1, &USART_ClockInitStructure);
// Default USART structure works for us.
USART_InitTypeDef USART_InitStructure;
USART_StructInit(&USART_InitStructure);
USART_Init(USART1, &USART_InitStructure);
USART_Cmd(USART1, ENABLE);
// // Disable data pushes from GPS.
// usartTx("$PUBX,40,GGA,0,0,0,0*5A\r\n");
// usartTx("$PUBX,40,GGA,0,0,0,0*5A\r\n"); // Repeat first; timing work around.
// usartTx("$PUBX,40,GLL,0,0,0,0*5C\r\n");
// usartTx("$PUBX,40,GSA,0,0,0,0*4E\r\n");
// usartTx("$PUBX,40,GSV,0,0,0,0*59\r\n");
// usartTx("$PUBX,40,RMC,0,0,0,0*47\r\n");
// usartTx("$PUBX,40,VTG,0,0,0,0*5E\r\n");
// // Keep just the recommended minimum flowing, slowly.
// usartTx("$PUBX,40,GGA,0,15,0,0*6E\r\n");
// usartTx("$PUBX,40,GGA,0,15,0,0*6E\r\n"); // Repeat first; timing work around.
// usartTx("$PUBX,40,GLL,0,15,0,0*68\r\n");
// usartTx("$PUBX,40,GSA,0,15,0,0*7A\r\n");
// usartTx("$PUBX,40,GSV,0,15,0,0*6D\r\n");
// usartTx("$PUBX,40,RMC,0,15,0,0*73\r\n");
// usartTx("$PUBX,40,VTG,0,15,0,0*6A\r\n");
// The first character is sometimes (always?) dropped, so send a few
// buffer characters that can be safely discarded.
gpsTxChar('\r'); gpsTxChar('\n');
gpsTxChar('\r'); gpsTxChar('\n');
// Disable all data pushes from GPS.
gpsSetPushFreq("DTM", 0);
gpsSetPushFreq("GBS", 0);
gpsSetPushFreq("GGA", 0);
gpsSetPushFreq("GLL", 0);
gpsSetPushFreq("GPQ", 0);
gpsSetPushFreq("GRS", 0);
gpsSetPushFreq("GSA", 0);
gpsSetPushFreq("GST", 0);
gpsSetPushFreq("GSV", 0);
gpsSetPushFreq("RMC", 0);
gpsSetPushFreq("THS", 0);
gpsSetPushFreq("VTG", 0);
// Except the one which tells us what time it is.
gpsSetPushFreq("ZDA", 2);
// Now that it won't be noisy, enable the RX interrupt.
NVIC_InitTypeDef NVIC_InitStructure = {
.NVIC_IRQChannel = USART1_IRQn,
.NVIC_IRQChannelPreemptionPriority = 1,
.NVIC_IRQChannelSubPriority = 1,
.NVIC_IRQChannelCmd = ENABLE,
};
NVIC_Init(&NVIC_InitStructure);
USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
}
// \\ // \\ // \\ // \\ // \\ // \\ // \\ // \\ // \\ // \\ // \\ // \\ // \\ //
void RTC_IRQHandler(void) {
if (RTC_GetFlagStatus(RTC_FLAG_SEC) != RESET) {
RTC_ClearFlag(RTC_FLAG_SEC);
gSecondFlag = 1;
gSeconds = RTC_GetCounter();
}
}
void SysTick_Handler(void) {
gBlinkTick++;
if (gBlinkTick > 125) {
gBlinkTick = 0;
gBlinkStatus = !gBlinkStatus;
}
uint8_t btnPressed = 0;
uint16_t btns = GPIO_ReadInputData(BTN_PORT) & BTN_ALL_PINS;
if ((btns & BTN_MAPLE_PIN) == BTN_MAPLE_PIN) btnPressed = BTN_MAPLE;
else if ((btns & BTN_DIM_PIN) == 0) btnPressed = BTN_DIM;
else if ((btns & BTN_DN_PIN) == 0) btnPressed = BTN_DOWN;
else if ((btns & BTN_UP_PIN) == 0) btnPressed = BTN_UP;
else if ((btns & BTN_SET_PIN) == 0) btnPressed = BTN_SET;
if (btnPressed && gButtonPending == btnPressed) {
if (gButtonDebounce > 10) {
// Button already activated, still held, do nothing.
} else if (gButtonDebounce == 10) {
// Transition! Set pressed button.
gButtonPressed = btnPressed;
gButtonDebounce++;
} else {
gButtonDebounce++;
}
} else {
gButtonDebounce = 0;
gButtonPending = btnPressed;
}
if (gDpTick > 0) {
gDpTick--;
if (gDpTick == 0) {
GPIO_WriteBit(DP_PORT, DP_PIN, RESET);
}
}
}
/**
* @brief Main program
* @param None
* @retval None
*/
int main(void)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
BufferInit(&TxRingBuf);
BufferInit(&RxRingBuf);
/*!< At this stage the microcontroller clock setting is already configured,
this is done through SystemInit() function which is called from startup
file (startup_stm32f401xx.s) before to branch to application main.
To reconfigure the default setting of SystemInit() function, refer to
system_stm32f4xx.c file
*/
/* TIM Configuration */
//TIM_Config();
/* -----------------------------------------------------------------------
TIM3 Configuration: generate 4 PWM signals with 4 different duty cycles.
In this example TIM3 input clock (TIM3CLK) is set to 2 * APB1 clock (PCLK1),
since APB1 prescaler is different from 1.
TIM3CLK = 2 * PCLK1
PCLK1 = HCLK / 4
=> TIM3CLK = HCLK / 2 = SystemCoreClock /2
To get TIM3 counter clock at 14 MHz, the prescaler is computed as follows:
Prescaler = (TIM3CLK / TIM3 counter clock) - 1
Prescaler = ((SystemCoreClock /2) /14 MHz) - 1
To get TIM3 output clock at 21 KHz, the period (ARR)) is computed as follows:
ARR = (TIM3 counter clock / TIM3 output clock) - 1
= 665
TIM3 Channel1 duty cycle = (TIM3_CCR1/ TIM3_ARR)* 100 = 50%
TIM3 Channel2 duty cycle = (TIM3_CCR2/ TIM3_ARR)* 100 = 37.5%
TIM3 Channel3 duty cycle = (TIM3_CCR3/ TIM3_ARR)* 100 = 25%
TIM3 Channel4 duty cycle = (TIM3_CCR4/ TIM3_ARR)* 100 = 12.5%
Note:
SystemCoreClock variable holds HCLK frequency and is defined in system_stm32f4xx.c file.
Each time the core clock (HCLK) changes, user had to call SystemCoreClockUpdate()
function to update SystemCoreClock variable value. Otherwise, any configuration
based on this variable will be incorrect.
----------------------------------------------------------------------- */
//===========================================================
//UART config
//===========================================================
USART_InitTypeDef UartHandle;
GPIO_InitTypeDef GPIO_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
USART_ClockInitTypeDef USART_ClockInitStruct;
RCC_ClocksTypeDef RCC_Clocks;
RCC_GetClocksFreq(&RCC_Clocks);
SysTick_Config(RCC_Clocks.HCLK_Frequency / 100);
USART_StructInit(&UartHandle);
USART_ClockStructInit(&USART_ClockInitStruct);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOD, ENABLE);
GPIO_PinAFConfig(GPIOD, GPIO_PinSource5, GPIO_AF_USART2);
GPIO_PinAFConfig(GPIOD, GPIO_PinSource6, GPIO_AF_USART2);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5 | GPIO_Pin_6;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ;
GPIO_Init(GPIOD, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_14;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ;
GPIO_Init(GPIOD, &GPIO_InitStructure);
USART_Init(USART2,&UartHandle);
USART_ClockInit(USART2,&USART_ClockInitStruct);
USART_ITConfig(USART2,USART_IT_RXNE,ENABLE);
USART_ITConfig(USART2, USART_IT_TC,ENABLE);
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x01;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x01;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
USART_Cmd(USART2, ENABLE);
Delay(40);
Sevenseg_Setup();
Delay(40);
USART_SendData(USART2,0xaaaa);
//GPIO_SetBits(GPIOB,GPIO_Pin_0 | GPIO_Pin_1);
GPIO_SetBits(GPIOD,GPIO_Pin_0);
//======================================================
//----------------------------------------------------
//========================================================
// /* Compute the prescaler value */
// PrescalerValue = (uint16_t) (SystemCoreClock / 1000000) - 1;
//
// /* Time base configuration */
// TIM_TimeBaseStructure.TIM_Period = 5000;
// TIM_TimeBaseStructure.TIM_Prescaler = PrescalerValue;
// TIM_TimeBaseStructure.TIM_ClockDivision = 0;
// TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
//
// TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);
//
// /* PWM1 Mode configuration: Channel1 */
// TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
// TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
// TIM_OCInitStructure.TIM_Pulse = CCR1_Val;
// TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
//
// TIM_OC1Init(TIM3, &TIM_OCInitStructure);
//
// TIM_OC1PreloadConfig(TIM3, TIM_OCPreload_Enable);
//
//
// /* PWM1 Mode configuration: Channel2 */
// TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
// TIM_OCInitStructure.TIM_Pulse = CCR2_Val;
//
// TIM_OC2Init(TIM3, &TIM_OCInitStructure);
//
// TIM_OC2PreloadConfig(TIM3, TIM_OCPreload_Enable);
//
// /* PWM1 Mode configuration: Channel3 */
// TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
// TIM_OCInitStructure.TIM_Pulse = CCR3_Val;
//
// TIM_OC3Init(TIM3, &TIM_OCInitStructure);
//
// TIM_OC3PreloadConfig(TIM3, TIM_OCPreload_Enable);
//
// /* PWM1 Mode configuration: Channel4 */
// TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
// TIM_OCInitStructure.TIM_Pulse = CCR4_Val;
//
// TIM_OC4Init(TIM3, &TIM_OCInitStructure);
//
// TIM_OC4PreloadConfig(TIM3, TIM_OCPreload_Enable);
//
// TIM_ARRPreloadConfig(TIM3, ENABLE);
//
// /* TIM3 enable counter */
// TIM_Cmd(TIM3, ENABLE);
int bts = 0;
Sevenseg_Send(0x33);
while (1)
{
if(RxRingBuf.length > 10) {
int i;
int ntosend = RxRingBuf.length;
for(i = 0; i < ntosend;i++)
{
bts = BufferRead(&RxRingBuf);
//if(bts == -1) break;
USART2_SendByte(bts);
}
/*
while(TxRingBuf.length > 0)
{
if((TxRingBuf.length > 0) && (USART_GetFlagStatus(USART2, USART_FLAG_TXE) == SET)) {
BufferSend(&TxRingBuf);
}
}
*/
}
/*
GPIO_ResetBits(GPIOB,GPIO_Pin_0 | GPIO_Pin_1);
GPIO_ResetBits(GPIOA,GPIO_Pin_0);
//GPIO_ToggleBits(GPIOB, GPIO_Pin_0);
GPIO_SetBits(GPIOB,GPIO_Pin_0 | GPIO_Pin_1);
GPIO_SetBits(GPIOA,GPIO_Pin_0);
*/
//USART_SendData(USART2,0x0051);
//USART_SendData(USART2,0x003b);
}
}
/*
*********************************************************************************************************
* 函 数 名: USART6_Init
* 功能说明: 初始化CPU的USART6串口硬件设备。预留
* 形 参：无
* 返 回 值: 无
*********************************************************************************************************
*/
void USART6_Init(_UART_BAUD BaudRate)
{
USART_InitTypeDef USART_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
USART_ClockInitTypeDef USART_ClockInitStruct;
RCC_AHB1PeriphClockCmd(USART6_TX_PORT_CLK | USART6_RX_PORT_CLK , ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART6, ENABLE);
/* 配置发送管脚*/
GPIO_PinAFConfig(USART6_TX_PORT, USART6_TX_SOURCE, GPIO_AF_USART6);
/*配置接收管脚*/
GPIO_PinAFConfig(USART6_RX_PORT, USART6_RX_SOURCE, GPIO_AF_USART6);
/* Configure USART Tx as alternate function */
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Speed = GPIO_SPEED;
GPIO_InitStructure.GPIO_Pin = USART6_TX_PIN;
GPIO_Init(USART6_TX_PORT, &GPIO_InitStructure);
/* Configure USART Rx as alternate function */
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Pin = USART6_RX_PIN;
GPIO_Init(USART6_RX_PORT, &GPIO_InitStructure);
/* USARTx configured as follow:
- BaudRate = 115200 baud
- Word Length = 8 Bits
- One Stop Bit
- No parity
- Hardware flow control disabled (RTS and CTS signals)
- Receive and transmit enabled
*/
USART_InitStructure.USART_BaudRate = BaudRate;
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(USART6, &USART_InitStructure);
USART_ClockStructInit(&USART_ClockInitStruct); //之前没有填入缺省值，是不行的
USART_ClockInit(USART6, &USART_ClockInitStruct);
NVIC_InitStructure.NVIC_IRQChannel =USART6_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;
NVIC_InitStructure.NVIC_IRQChannelCmd= ENABLE;
NVIC_Init(&NVIC_InitStructure);
#if UART6_DMA_RX_ENABLE
/*空闲中断*/
USART_ITConfig(USART6, USART_IT_IDLE , ENABLE);
#else
USART_ITConfig(USART6, USART_IT_RXNE | USART_IT_IDLE , ENABLE);
#endif
/* Enable USART */
USART_Cmd(USART6, ENABLE);
/*
CPU的小缺陷：串口配置好，如果直接Send，则第1个字节发送不出去
如下语句解决第1个字节无法正确发送出去的问题：
清发送完成标志，Transmission Complete flag
*/
USART_ClearFlag(USART6, USART_FLAG_TC);
memset((u8*)&UART6_Str,0x00,sizeof(UART6_Str));
#if UART6_DMA_RX_ENABLE
USART6_RX_DMA();
#endif
#if UART6_DMA_TX_ENABLE
USART6_TX_DMA();
UART6_Str.Send_Finish = 1;
#endif
}