STM32f103rbt6的IIc1 的问题
各位路过的大侠好！本人第一次使用硬件IIC， 在使用的时候参考了很多例程，都无法实现。debug的时候程序总是停留在第一个检测位，有的时候会走到下一个位。
采用内部108Mhz，4分频27MHZ到 pclk1 .
本人已经闭门造车2天了，希望大侠帮我找找问题。程序如下：
#include "sys.h"
#include "usart.h"
#include "delay.h"
//#include "led.h"
//#include "beep.h"
//#include "key.h"
//#include "timer.h"
//#include "adc.h"
#include "output.h"
//#include "output.h"
//#include "ir.h"
//#include "hym8563.h"
//#include "stmflash.h"
//#include "TFT018.h"
//extern U8 bmp[];
//#include "stm32f10x_i2c.h"
#define DEVICE_IP 1
#define iic_address 0x0a
#define iic_address2 0x0b
/* I2C Events */
/* EV1 */
#defineI2C_EVENT_SLAVE_TRANSMITTER_ADDRESS_MATCHED ((u32)0x00060082) /* TRA, BUSY, TXE and ADDR flags */
#defineI2C_EVENT_SLAVE_RECEIVER_ADDRESS_MATCHED ((u32)0x00020002) /* BUSY and ADDR flags */
#defineI2C_EVENT_SLAVE_TRANSMITTER_SECONDADDRESS_MATCHED ((u32)0x00860080)/* DUALF, TRA, BUSY and TXE flags */
#defineI2C_EVENT_SLAVE_RECEIVER_SECONDADDRESS_MATCHED ((u32)0x00820000)/* DUALF and BUSY flags */
#defineI2C_EVENT_SLAVE_GENERALCALLADDRESS_MATCHED ((u32)0x00120000)/* GENCALL and BUSY flags */
/* EV2 */
#defineI2C_EVENT_SLAVE_BYTE_RECEIVED ((u32)0x00020040)/* BUSY and RXNE flags */
#defineEV2 I2C_EVENT_SLAVE_BYTE_RECEIVED
/* EV3 */
#defineI2C_EVENT_SLAVE_BYTE_TRANSMITTED ((u32)0x00060084)/* TRA, BUSY, TXE and BTF flags */
#defineEV3 I2C_EVENT_SLAVE_BYTE_TRANSMITTED
/* EV4 */
#defineI2C_EVENT_SLAVE_STOP_DETECTED ((u32)0x00000010)/* STOPF flag */
#defineEV4 I2C_EVENT_SLAVE_STOP_DETECTED
/* EV5 */
#defineI2C_EVENT_MASTER_MODE_SELECT ((u32)0x00030001)/* BUSY, MSL and SB flag */
#defineEV5 I2C_EVENT_MASTER_MODE_SELECT
/* EV6 */
#defineI2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED ((u32)0x00070082)/* BUSY, MSL, ADDR, TXE and TRA flags */
#defineI2C_EVENT_MASTER_RECEIVER_MODE_SELECTED ((u32)0x00030002)/* BUSY, MSL and ADDR flags */
/* EV7 */
#defineI2C_EVENT_MASTER_BYTE_RECEIVED ((u32)0x00030040)/* BUSY, MSL and RXNE flags */
#defineEV7 I2C_EVENT_MASTER_BYTE_RECEIVED
/* EV8 */
#defineI2C_EVENT_MASTER_BYTE_TRANSMITTED ((u32)0x00070084)/* TRA, BUSY, MSL, TXE and BTF flags */
#defineEV8_1 I2C_EVENT_MASTER_BYTE_TRANSMITTED
/* --EV8 */
#define I2C_EVENT_MASTER_BYTE_TRANSMITTING ((u32)0x00070080) /* TRA, BUSY, MSL, TXE flags */
/* EV9 */
#defineI2C_EVENT_MASTER_MODE_ADDRESS10 ((u32)0x00030008)/* BUSY, MSL and ADD10 flags */
#defineEV9 I2C_EVENT_MASTER_MODE_ADDRESS10
/* EV3_2 */
#defineI2C_EVENT_SLAVE_ACK_FAILURE ((u32)0x00000400)/* AF flag */
#defineEV3_2 I2C_EVENT_SLAVE_ACK_FAILURE
ErrorStatus I2C_CheckEvent(I2C_TypeDef* I2Cx, u32 I2C_EVENT)
{
u32 lastevent = 0;
u32 flag1 = 0, flag2 = 0;
ErrorStatus status = ERROR;
/* Check the parameters */
assert_param(IS_I2C_ALL_PERIPH(I2Cx));
assert_param(IS_I2C_EVENT(I2C_EVENT));
/* Read the I2Cx status register */
flag1 = I2Cx->SR1;
flag2 = I2Cx->SR2;
flag2 = flag2 << 16;
/* Get the last event value from I2C status register */
lastevent = (flag1 | flag2) & 0x0000ffff;
/* Check whether the last event is equal to I2C_EVENT */
if (lastevent == I2C_EVENT )
{
/* SUCCESS: last event is equal to I2C_EVENT */
status = SUCCESS;
}
else
{
/* ERROR: last event is different from I2C_EVENT */
status = ERROR;
}
/* Return status */
return status;
}
void I2C_GenerateSTART(I2C_TypeDef* I2Cx, FunctionalState NewState)
{
if (NewState != DISABLE)
{
/* Generate a START condition */
I2Cx->CR1 |= 1<<8;
}
else
{
/* Disable the START condition generation */
I2Cx->CR1 &= ~(1<<8);
}
}
void I2C_GenerateSTOP(I2C_TypeDef* I2Cx, FunctionalState NewState)
{
if (NewState != DISABLE)
{
/* Generate a STOP condition */
I2Cx->CR1 |= 1<<9;
}
else
{
/* Disable the STOP condition generation */
I2Cx->CR1 &= ~(1<<9);
}
}
void I2C_SendData(I2C_TypeDef* I2Cx, u8 Data)
{
/* Check the parameters */
assert_param(IS_I2C_ALL_PERIPH(I2Cx));
/* Write in the DR register the data to be sent */
I2Cx->DR = Data;
}
u8 I2C_ReceiveData(I2C_TypeDef* I2Cx)
{
/* Check the parameters */
assert_param(IS_I2C_ALL_PERIPH(I2Cx));
/* Return the data in the DR register */
return (u8)I2Cx->DR;
}
//==========================================
int main(void)
{
u8 i;
u8 x;
u16 t;
u16 u16_flag,u16_flag1;
u8 dir=1;
Stm32_Clock_Init(9); //ϵͳʱÖÓÉèÖÃ9*12MÄÚ²¿HSI
delay_init(108); //ÑÓʱ³õʼ»¯36--108
/*LED_Init(); //³õʼ»¯ÓëLEDÁ¬½ÓµÄÓ²¼þ½Ó¿Ú
//BEEP_Init(); //³õʼ»¯·äÃùÆ÷¶Ë¿Ú
KEY_Init(); //³õʼ»¯ÊäÈë¶Ë¿Ú
Output_Init(); //³õʼ»¯Êä³ö¿ØÖƶ˿Ú
HYM8563_init();
uart_init(108,115200);
uart3_init(27,115200);
TIM2_Int_Init(5400,0);
printf("U16_UP\r\n");
USART3->DR = 0x55;
RF_init();
Adc_Init();
*/
//uart2_init(27,9600);
//printf("U16_UP\r\n");
//³õʼ»¯i2C1;
RCC->APB2ENR|=1<<3; //ʹÄÜPORTBʱÖÓ
RCC->APB1ENR|=1<<21;
RCC->APB1RSTR|=1<<21; //ADC1¸´Î»
RCC->APB1RSTR&=~(1<<21);//¸´Î»½áÊø
AFIO->MAPR &= ~(1<<1);//I2C1ûÓÐÖØÓ³Éä
//AFIO->MAPR |= ((u32)0x00000000);//0x03<<24;½ûÖ¹JTAG¹¦Äܽţ¬ÉèÖÃPB3PB4ΪIO¿Ú
GPIOB->CRL&=0X00FFFFFF;
GPIOB->CRL|=0XFF000000; //
PBout(6)=1;
PBout(7)=1;
//=======================================
I2C1->CR1=0;
/* Enable the selected I2C peripheral */
I2C1->CR1 |= 1<<0;
I2C1->CR1 |= 1<<3;//´Ó
//=======================================
I2C1->CR2=0;
I2C1->CR2 |= 27<<0;
//=======================================
I2C1->OAR1=0x4000;
I2C1->OAR1 &=~(1<<15);//7bit address
I2C1->OAR1 |= (iic_address&0xfe);
I2C1->OAR2=0x0000;
I2C1->OAR2 |=(iic_address2&0xfe);
I2C1->OAR2 |= 1<<0;//ÆßλµØÖ·Ë«µØַģʽ£»
//=======cCCR================================
/* DisEnable the selected I2C peripheral */
I2C1->CR1 &= ~(1<<0);
I2C1->CCR =0;
I2C1->CCR &=~(1<<15);// f/s ¿ìËÙģʽ±ê׼ģʽ
I2C1->CCR &=~(1<<14);// DUTY ¿ìËÙģʽϵÄÕ¼¿Õ±È L/H=2
//ÉèÖÃÖ÷ģʽÊǵķ¢ËÍʼÖÕËÙ¶È200khz
I2C1->CCR |= (27000/100) ;
//=======================================
I2C1->TRISE=(27+1);//ÉÏÉýÑØ
//=======================================
//I2C1->SR1=0;
//=======================================
//I2C1->SR2=0;
//=======================================
//I2C1->DR=0;
//=======================================
/* Enable the selected I2C peripheral */
I2C1->CR1 |= 1<<0;//ʹÄÜ
//while((I2C1->SR2&(1<<1)));
while(1)
{
//=============================================================================
I2C1->CR1 |= 1<<8;//I2C_GenerateSTART(I2C1, 1);//¿ªÊ¼ÐźÅ
delay_us(100);
//EV5ʼþ
while(!I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_MODE_SELECT));
//========address================================
I2C1->DR=0xa2;
//==============================
//EV6 EV8_1£¨¸ÃʼþÅжÏͬʱÅжÏÁËEV8_1ʼþ£©
while(!I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));
//==============================================
I2C1->DR=0x55;
//EV8ʼþ I2C_EVENT_MASTER_BYTE_TRANSMITTED
while(!I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_BYTE_TRANSMITTING)) ;
//=========================================
I2C1->DR=0x02;
while(!I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_BYTE_TRANSMITTED));
//I2C1->CR1 |= 1<<9;//I2C_GenerateSTOP(I2C_TypeDef* I2Cx, FunctionalState NewState)
I2C_GenerateSTOP(I2C1,ENABLE); /*EV8_2ʼþÖеijÌÐòдֹͣ*/
// printf(" I2C1->CR1:%x\r\n" ,I2C1->CR1);
delay_us(20000);
}
}
本人邮件 jyqcug@163.com
有解决了的大侠可以转发我学习一下， 另外其他和我一样的新手要是有疑问的也可以问我， 本人尽力回答。:):):):) 没听说过STM32F1系列芯片的IIC有问题吗？大家都不用硬件IIC，而用模拟IIC whtt 发表于 2016-5-21 10:35
没听说过STM32F1系列芯片的IIC有问题吗？大家都不用硬件IIC，而用模拟IIC
幻想一下，比较期待能弄出来嘛！
听说F1硬件有问题，你用F0试一下？ STM32F103可以跑这么高频率？ 看到了不精确的延时函数，再就是用了goto 延时给用中断好些。本来就不好找问题
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