【Ubuntu VSCODE+GCC】CW32L031实现printf工程

#include "user_uart.h"



static void SerialInit(uint32_t BaudRate);



static void SerialSend(uint8_t Data);



static uint8_t const pow2_table[] = {0, 1, 2, 3, 4, 5, 6, 7};



void LogInit(void)



{



SerialInit(LOG_SERIAL_BPS);



}



static void SerialInit(uint32_t BaudRate)



{



uint32_t PCLK_Freq;



GPIO_InitTypeDef GPIO_InitStructure = {0};



USART_InitTypeDef USART_InitStructure = {0};



PCLK_Freq = SystemCoreClock >> pow2_table[CW_SYSCTRL->CR0_f.HCLKPRS];



PCLK_Freq >>= pow2_table[CW_SYSCTRL->CR0_f.PCLKPRS];



// 调试串口使用UART1



// PA8->TX



// PA9<-RX



// 时钟使能



__RCC_GPIOA_CLK_ENABLE();



__RCC_UART1_CLK_ENABLE();



// 先设置UART TX RX 复用，后设置GPIO的属性，避免口线上出现毛刺



PA08_AFx_UART1TXD();



PA09_AFx_UART1RXD();



GPIO_InitStructure.Pins = GPIO_PIN_8;



GPIO_InitStructure.Mode = GPIO_MODE_OUTPUT_PP;



GPIO_Init(CW_GPIOA, &GPIO_InitStructure);



GPIO_InitStructure.Pins = GPIO_PIN_9;



GPIO_InitStructure.Mode = GPIO_MODE_INPUT;



GPIO_Init(CW_GPIOA, &GPIO_InitStructure);



USART_InitStructure.USART_BaudRate = BaudRate;



USART_InitStructure.USART_Over = USART_Over_16;



USART_InitStructure.USART_Source = USART_Source_PCLK;



USART_InitStructure.USART_UclkFreq = PCLK_Freq;



USART_InitStructure.USART_StartBit = USART_StartBit_FE;



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(CW_UART1, &USART_InitStructure);



}



static void SerialSend(uint8_t Data)



{



USART_SendData_8bit(CW_UART1, Data);



while (USART_GetFlagStatus(CW_UART1, USART_FLAG_TXE) == RESET);



}



int _write (int fd, char *pBuffer, int size)



{



for (int i = 0; i < size; i++)



{



SerialSend((uint8_t)pBuffer[i]);



}



return size;



}