我用的原子的407的串口例子,引脚也没有连接错,接收函数是可以的,但是printf函数就是用不了,USART_SendData(USART1,0x34);函数发一个字节之后一直就显示错误,我都郁闷死了,什么也没改啊,请求指教一下
[mw_shl_code=applescript,true]int main(void)
{
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);//éèÖÃÏμí3ÖD¶ÏóÅÏ輶·Ö×é2
delay_init(168); //Ñóê±3õê¼»ˉ
uart_init(115200); //′®¿ú3õê¼»ˉ2¨ìØÂêÎa115200
LED_Init(); //3õê¼»ˉóëLEDᬽóμÄó2¼t½ó¿ú
while(1)
{
//printf("nYYY
");
USART_SendData(USART1,0x34);
//delay_ms(100);
}
}[/mw_shl_code]
[mw_shl_code=applescript,true]#include "sys.h"
#include "usart.h"
//////////////////////////////////////////////////////////////////////////////////
//èç1ûê1óÃucos,Ôò°üà¨ÏÂÃæμÄí·Îļt¼′¿é.
#if SYSTEM_SUPPORT_OS
#include "includes.h" //ucos ê1óÃ
#endif
//////////////////////////////////////////////////////////////////////////////////
//±¾3ìDòÖ»1©Ñ§Ï°ê1óã¬Î′¾-×÷ÕßDí¿é£¬2»μÃóÃóúÆäËüèÎoÎóÃí¾
//ALIENTEK STM32F4ì½Ë÷Õß¿a·¢°å
//′®¿ú13õê¼»ˉ
//ÕyμãÔ-×ó@ALIENTEK
//¼¼êõÂÛì3:
www.openedv.com
//DT¸ÄèÕÆú:2014/6/10
//°æ±¾£oV1.5
//°æè¨ËùóD£¬μá°æ±Ø¾¿¡£
//Copyright(C) 1ãÖYêDDÇòíμç×ó¿Æ¼¼óDÏT1«Ë¾ 2009-2019
//All rights reserved
//********************************************************************************
//V1.3DT¸ÄËμÃ÷
//Ö§3Öêêó|2»í¬ÆμÂêÏÂμÄ′®¿ú2¨ìØÂêéèÖÃ.
//¼óèëá˶ÔprintfμÄÖ§3Ö
//Ôö¼óáË′®¿ú½óêÕÃüáî1|Äü.
//DTÕyáËprintfμúò»¸ö×Ö·û¶aê§μÄbug
//V1.4DT¸ÄËμÃ÷
//1,DT¸Ä′®¿ú3õê¼»ˉIOμÄbug
//2,DT¸ÄáËUSART_RX_STA,ê1μÃ′®¿ú×î′ó½óêÕ×Ö½úêyÎa2μÄ14′η½
//3,Ôö¼óáËUSART_REC_LEN,óÃóú¶¨òå′®¿ú×î′óÔêDí½óêÕμÄ×Ö½úêy(2»′óóú2μÄ14′η½)
//4,DT¸ÄáËEN_USART1_RXμÄê1Äü·½ê½
//V1.5DT¸ÄËμÃ÷
//1,Ôö¼óá˶ÔUCOSIIμÄÖ§3Ö
//////////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////
//¼óèëòÔÏÂ′úÂë,Ö§3Öprintfoˉêy,¶ø2»DèòaÑ¡Ôñuse MicroLIB
#if 1
#pragma import(__use_no_semihosting)
//±ê×¼¿aDèòaμÄÖ§3Öoˉêy
struct __FILE
{
int handle;
};
FILE __stdout;
//¶¨òå_sys_exit()òÔ±üÃaê1óðëÖ÷»úÄ£ê½
void _sys_exit(int x)
{
x = x;
}
//Öض¨òåfputcoˉêy
int fputc(int ch, FILE *f)
{
while((USART1->SR&0X40)==0);//Ñ-»··¢Ëí,Ö±μ½·¢Ëííê±Ï
USART1->DR = (u8) ch;
return ch;
}
#endif
#if EN_USART1_RX //èç1ûê1Äüá˽óêÕ
//′®¿ú1ÖD¶Ï·tÎñ3ìDò
//×¢òa,¶áè¡USARTx->SRÄü±üÃaÄaÃûÆäÃîμÄ′íÎó
u8 USART_RX_BUF[USART_REC_LEN]; //½óêÕ»o3å,×î′óUSART_REC_LEN¸ö×Ö½ú.
//½óêÕ×′ì¬
//bit15£¬ ½óêÕíê3é±êÖ¾
//bit14£¬ ½óêÕμ½0x0d
//bit13~0£¬ ½óêÕμ½μÄóDD§×Ö½úêyÄ¿
u16 USART_RX_STA=0; //½óêÕ×′쬱ê¼Ç
//3õê¼»ˉIO ′®¿ú1
//bound:2¨ìØÂê
void uart_init(u32 bound){
//GPIO¶Ë¿úéèÖÃ
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA,ENABLE); //ê1ÄüGPIOAê±Öó
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1,ENABLE);//ê1ÄüUSART1ê±Öó
//′®¿ú1¶Ôó|òy½Å¸′óÃó3éä
GPIO_PinAFConfig(GPIOA,GPIO_PinSource9,GPIO_AF_USART1); //GPIOA9¸′óÃÎaUSART1
GPIO_PinAFConfig(GPIOA,GPIO_PinSource10,GPIO_AF_USART1); //GPIOA10¸′óÃÎaUSART1
//USART1¶Ë¿úÅäÖÃ
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9 | GPIO_Pin_10; //GPIOA9óëGPIOA10
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;//¸′óÃ1|Äü
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //Ëù¶è50MHz
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; //íÆíì¸′óÃêä3ö
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_DOWN; //éÏà-
GPIO_Init(GPIOA,&GPIO_InitStructure); //3õê¼»ˉPA9£¬
A10
//USART1 3õê¼»ˉéèÖÃ
USART_InitStructure.USART_BaudRate = bound;//2¨ìØÂêéèÖÃ
USART_InitStructure.USART_WordLength = USART_WordLength_8b;//×Ö3¤Îa8λêy¾Y¸ñê½
USART_InitStructure.USART_StopBits = USART_StopBits_1;//ò»¸öí£Ö1λ
USART_InitStructure.USART_Parity = USART_Parity_No;//ÎTÆæżD£Ñéλ
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//ÎTó2¼têy¾Yá÷¿ØÖÆ
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; //êÕ·¢Ä£ê½
USART_Init(USART1, &USART_InitStructure); //3õê¼»ˉ′®¿ú1
USART_Cmd(USART1, ENABLE); //ê1Äü′®¿ú1
//USART_ClearFlag(USART1, USART_FLAG_TC);
#if EN_USART1_RX
USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);//¿aÆôÏà1ØÖD¶Ï
//Usart1 NVIC ÅäÖÃ
NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;//′®¿ú1ÖD¶Ïí¨μà
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=3;//ÇàÕ¼óÅÏ輶3
NVIC_InitStructure.NVIC_IRQChannelSubPriority =3; //×óóÅÏ輶3
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQí¨μàê1Äü
NVIC_Init(&NVIC_InitStructure); //¸ù¾YÖ¸¶¨μÄ2Îêy3õê¼»ˉVIC¼Ä′æÆ÷¡¢
#endif
}
void USART1_IRQHandler(void) //′®¿ú1ÖD¶Ï·tÎñ3ìDò
{
if(USART_ReceiveData(USART1)=='S')
{
GPIO_SetBits(GPIOD,GPIO_Pin_12 | GPIO_Pin_13| GPIO_Pin_14| GPIO_Pin_15);
}
if(USART_ReceiveData(USART1)=='Q')
{
GPIO_ResetBits(GPIOD,GPIO_Pin_12 | GPIO_Pin_13| GPIO_Pin_14| GPIO_Pin_15);
}
// u8 Res;
//#if SYSTEM_SUPPORT_OS //èç1ûSYSTEM_SUPPORT_OSÎaÕ棬ÔòDèòaÖ§3ÖOS.
// OSIntEnter();
//#endif
// if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET) //½óêÕÖD¶Ï(½óêÕμ½μÄêy¾Y±ØDëêÇ0x0d 0x0a½áÎ2)
// {
// Res =USART_ReceiveData(USART1);//(USART1->DR); //¶á衽óêÕμ½μÄêy¾Y
//
// if((USART_RX_STA&0x8000)==0)//½óêÕÎ′íê3é
// {
// if(USART_RX_STA&0x4000)//½óêÕμ½áË0x0d
// {
// if(Res!=0x0a)USART_RX_STA=0;//½óêÕ′íÎó,ÖØD¿aê¼
// else USART_RX_STA|=0x8000; //½óêÕíê3éáË
// }
// else //»1ûêÕμ½0X0D
// {
// if(Res==0x0d)USART_RX_STA|=0x4000;
// else
// {
// USART_RX_BUF[USART_RX_STA&0X3FFF]=Res ;
// USART_RX_STA++;
// if(USART_RX_STA>(USART_REC_LEN-1))USART_RX_STA=0;//½óêÕêy¾Y′íÎó,ÖØD¿aê¼½óêÕ
// }
// }
// }
// }
}
#endif
[/mw_shl_code]
谢谢了,我知道问题出现在哪里了。刚买回来的板子,串口1倍占用了
是 1 啊
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