10Mhz chắc chỉ là xung clock làm việc cho cpu
... sao không thử đi ! 
.
, cái máy 2 ngày nay bị bọn vi rút tứ tung ... Hay là vắc xin phản tác dụng rồi ! !
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/* Includes ------------------------------------------------------------------*/
#include "stm8s.h"
#include "stdio.h"
#include "stm8s_uart1.h"
#include "stm8s_clk.h"
#include "stm8s_gpio.h"
int putchar (int c); // functions Putchar --> UART
int getchar (void); // functions Getchar --> UART
char echo;
void main(void)
{
/*High speed internal clock prescaler: 1*/
CLK_DeInit();
CLK_HSIPrescalerConfig(CLK_PRESCALER_HSIDIV1); //f_Master = HSI/1 = 16MHz
CLK_SYSCLKConfig(CLK_PRESCALER_CPUDIV1); //f_CPU = f_Master/1 = 16MHz
while(CLK_GetFlagStatus(CLK_FLAG_HSIRDY)!=SET); //wait until HSI ready
GPIO_DeInit(GPIOA);
GPIO_Init(GPIOA, GPIO_PIN_3, GPIO_MODE_OUT_PP_HIGH_FAST);
UART1_DeInit();
/* UART1 configuration ------------------------------------------------------*/
/* UART1 configured as follow:
- BaudRate = 9600 baud
- Word Length = 8 Bits
- One Stop Bit
- No parity
- Receive and transmit enabled
- UART1 Clock disabled
*/
UART1_Init((uint32_t)9600, UART1_WORDLENGTH_8D, UART1_STOPBITS_1, UART1_PARITY_NO,
UART1_SYNCMODE_CLOCK_DISABLE, UART1_MODE_TXRX_ENABLE);
while (1)
{
echo = getchar();
printf("%c", echo);
GPIO_WriteReverse(GPIOA, GPIO_PIN_3); //Toggle LED
}
}
/////////////////////// Functions /////////////////////////////////
int putchar (int c)
{
// Write a character to the UART1
UART1_SendData8(c);
// Loop until the end of transmission
while (UART1_GetFlagStatus(UART1_FLAG_TXE) == RESET);
return (c);
}
///////////////////
int getchar (void)
{
int c = 0;
// Loop until the Read data register flag is SET
while (UART1_GetFlagStatus(UART1_FLAG_RXNE) == RESET);
c = UART1_ReceiveData8();
return (c);
}
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