stm8l051f3p6串口
想通过串口tx打印调试信息，但是始终调不通，没用中断，没用rx。示波器观察PA2时钟高电平。代码如下：
void SysClkInit(void)
{
CLK_CKDIVR_bit.CKM = 3;
CLK_ICKCR_bit.HSION = 1;
CLK_SWR = 1;
CLK_PCKENR1_bit.PCKEN15 = 1; //USART1
CLK_PCKENR1_bit.PCKEN10 = 1; //TIM2
CLK_PCKENR2_bit.PCKEN27 = 1; //Boot ROM
CLK_PCKENR2_bit.PCKEN20 = 1; //ADC1
}
void SysUSART1Init(void)
{
SYSCFG_RMPCR1_bit.USART1TR_REMAP = 1; //USART1_TX on PA2 and USART1_RX on PA3
PA_DDR_DDR2 = 1; //output
PA_ODR_ODR2 = 1; //data
PA_CR1_C12 = 1; //push pull
PA_CR2_C22 = 1; //10M
USART1_CR1_bit.M = 0; //1 start bit, 8 data bits, n stop bit
USART1_CR3_bit.STOP0 = 0;
USART1_CR3_bit.STOP1 = 0; //1 stop bit
USART1_CR1_bit.PCEN = 0; //parity disable
USART1_BRR2 = 0x00; //9600
USART1_BRR1 = 0x0D;
USART1_CR2_bit.TEN = 1; //transmitter enable
USART1_CR1_bit.USARTD = 0;//usart enable
}
void UsartTxAByte(unsigned char ucData)
{
USART1_DR = ucData;
while (0 == USART1_SR_bit.TXE);
}
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