//源檔案
void UartGpioConfig()
{
RCC->AHB1ENR |= (1<<3); //使能GPIOD
RCC->APB1ENR |= (1<<18); //使能USART3
RCC->APB2ENR |=
//PD8 TXD
GPIOD->MODER |= (2<<16); //復用模式
GPIOD->OSPEEDR |= (2<<16); //High speed
GPIOD->AFR[1] |= (7<<0); //AF7
GPIOD->PUPDR |= (1<<8*2);
//PD9 RXD
GPIOD->MODER |= (2<<18); //復用模式
GPIOD->OSPEEDR |= (2<<18); //High speed
GPIOD->AFR[0] |= (7<<4); //AF7
GPIOD->PUPDR |= (1<<9*2);
}
void UartCoreConfig(uint32_t bound)
{
USART3->BRR |= (54*1000000+bound/2)/bound;
USART3->CR1 = 0;
USART3->CR1 |= 0<<28; //設定 M1=0
USART3->CR1 |= 0<<12; //設定 M0=0&M1=0,選擇 8 位字長
USART3->CR1 |= 0<<15; //設定 OVER8=0,16 倍過采樣
USART3->CR1 |= 1<<3; //串口發送使能
USART3->CR1 |= 1<<0; //串口使能
}
void UartPhyConfig()
{
UartGpioConfig();
UartCoreConfig(UartBaud);
}
void UartPhySendByte(uint8_t byte)
{
USART3->TDR = byte;
while((USART3->ISR &(1<<6)) == 0);
}
void UartPhySendString(uint8_t *str)
{
while(*str)
{
UartPhySendByte(*str);
str++;
}
}
//頭檔案
/*****************************Uart*************************************/
#define UartBaud 115200
void UartPhyConfig(void);
void UartPhySendByte(uint8_t byte);
void UartPhySendString(uint8_t *str);
/**********************************************************************/
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標籤：其他