You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
93 lines
2.0 KiB
C
93 lines
2.0 KiB
C
#include "SWM221.h"
|
|
|
|
|
|
void SerialInit(void);
|
|
void SystemInit_72MHz(void);
|
|
|
|
int main(void)
|
|
{
|
|
SystemInit();
|
|
|
|
SerialInit();
|
|
|
|
printf("SystemCoreClock = %d\r\n", SystemCoreClock);
|
|
|
|
while(1==1)
|
|
{
|
|
SystemInit_72MHz();
|
|
|
|
UART_SetBaudrate(UART0, 57600); // 切换系统主频后需要重新配置波特率
|
|
|
|
for(int i = 0; i < 4; i++)
|
|
{
|
|
printf("SystemCoreClock = %d\r\n", SystemCoreClock);
|
|
|
|
for(int j = 0; j < SystemCoreClock / 8; j++) __NOP();
|
|
}
|
|
|
|
SystemInit();
|
|
|
|
UART_SetBaudrate(UART0, 57600);
|
|
|
|
for(int i = 0; i < 4; i++)
|
|
{
|
|
printf("SystemCoreClock = %d\r\n", SystemCoreClock);
|
|
|
|
for(int j = 0; j < SystemCoreClock / 8; j++) __NOP();
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
void SystemInit_72MHz(void)
|
|
{
|
|
Flash_Param_at_xMHz(72);
|
|
|
|
switchToHRC();
|
|
|
|
switchOnPLL(SYS_CLK_8MHz, 2, 18);
|
|
|
|
switchToDIV(SYS_CLK_PLL, SYS_CLK_DIV_1);
|
|
|
|
Flash_Param_at_xMHz(CyclesPerUs);
|
|
}
|
|
|
|
|
|
void SerialInit(void)
|
|
{
|
|
UART_InitStructure UART_initStruct;
|
|
|
|
PORT_Init(PORTA, PIN0, PORTA_PIN0_UART0_RX, 1); //GPIOA.0配置为UART0 RXD
|
|
PORT_Init(PORTA, PIN1, PORTA_PIN1_UART0_TX, 0); //GPIOA.1配置为UART0 TXD
|
|
|
|
UART_initStruct.Baudrate = 57600;
|
|
UART_initStruct.DataBits = UART_DATA_8BIT;
|
|
UART_initStruct.Parity = UART_PARITY_NONE;
|
|
UART_initStruct.StopBits = UART_STOP_1BIT;
|
|
UART_initStruct.RXThreshold = 3;
|
|
UART_initStruct.RXThresholdIEn = 0;
|
|
UART_initStruct.TXThreshold = 3;
|
|
UART_initStruct.TXThresholdIEn = 0;
|
|
UART_initStruct.TimeoutTime = 10;
|
|
UART_initStruct.TimeoutIEn = 0;
|
|
UART_Init(UART0, &UART_initStruct);
|
|
UART_Open(UART0);
|
|
}
|
|
|
|
/******************************************************************************************************************************************
|
|
* 函数名称: fputc()
|
|
* 功能说明: printf()使用此函数完成实际的串口打印动作
|
|
* 输 入: int ch 要打印的字符
|
|
* FILE *f 文件句柄
|
|
* 输 出: 无
|
|
* 注意事项: 无
|
|
******************************************************************************************************************************************/
|
|
int fputc(int ch, FILE *f)
|
|
{
|
|
UART_WriteByte(UART0, ch);
|
|
|
|
while(UART_IsTXBusy(UART0));
|
|
|
|
return ch;
|
|
}
|