最近用了一款 BS8112A-3 16NSOP 12键电容触摸按键芯片IC，调了半天没调通 ，最后发现把设备地址看错了，手册给的是7bit地址，子设备地址应该是0xA0不应该是0x50!
#include "stm32f0xx.h"
void I2C_INT_Init()
{GPIO_InitTypeDef GPIO_InitStructure;EXTI_InitTypeDef EXTI_InitStructure;NVIC_InitTypeDef NVIC_InitStructure;RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA,ENABLE);//ÅäÖÃʱÖÓRCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG,ENABLE);//ÅäÖÃʱÖÓGPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;GPIO_Init(GPIOA, &GPIO_InitStructure);EXTI_InitStructure.EXTI_Line=EXTI_Line5;EXTI_InitStructure.EXTI_Mode=EXTI_Mode_Interrupt;EXTI_InitStructure.EXTI_Trigger=EXTI_Trigger_Falling;EXTI_InitStructure.EXTI_LineCmd=ENABLE;SYSCFG_EXTILineConfig(EXTI_PortSourceGPIOA, EXTI_PinSource5);EXTI_Init(&EXTI_InitStructure);NVIC_InitStructure.NVIC_IRQChannel=EXTI4_15_IRQn;NVIC_InitStructure.NVIC_IRQChannelPriority=2;NVIC_InitStructure.NVIC_IRQChannelCmd=ENABLE;NVIC_Init(&NVIC_InitStructure);
}
void I2C_SDACL_Init(void) //I2CÒý½ÅÅäÖÃ
{GPIO_InitTypeDef GPIO_InitStructure;RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA,ENABLE);//ÅäÖÃʱÖÓGPIO_InitStructure.GPIO_Pin = GPIO_Pin_10|GPIO_Pin_9;GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;GPIO_InitStructure.GPIO_OType = GPIO_OType_OD;GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;GPIO_Init(GPIOA, &GPIO_InitStructure);GPIO_PinAFConfig(GPIOA,GPIO_PinSource10, GPIO_AF_4);GPIO_PinAFConfig(GPIOA, GPIO_PinSource9, GPIO_AF_4);}void ZLG_24C_Init(void)//I2C³õʼ»¯º¯Êý
{ I2C_InitTypeDef I2C_InitStructure;I2C_INT_Init();I2C_SDACL_Init();RCC_I2CCLKConfig(RCC_I2C1CLK_SYSCLK);RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C1,ENABLE);//ÅäÖÃʱÖÓRCC_APB1Periph_I2C1I2C_InitStructure.I2C_Mode=I2C_Mode_I2C;I2C_InitStructure.I2C_Ack=I2C_Ack_Enable;//I2C_InitStructure.I2C_Ack=I2C_Ack_Disable;I2C_InitStructure.I2C_AcknowledgedAddress=I2C_AcknowledgedAddress_7bit;I2C_InitStructure.I2C_DigitalFilter = 0x00;I2C_InitStructure.I2C_OwnAddress1=0x00;//I2C_InitStructure.I2C_Timing=0x30E32E44;I2C_InitStructure.I2C_Timing=0x20D22E37;I2C_InitStructure.I2C_AnalogFilter=I2C_AnalogFilter_Enable;I2C_Init(I2C1,&I2C_InitStructure);I2C_Cmd(I2C1,ENABLE);// ZLG_24C_Read(0xA0,0x08);
}
uint8_t ZLG_24C_Read(uint8_t addr1, uint8_t addr2)//¶ÁI2Cº¯Êý
{uint8_t data;uint16_t i;i=0;while(I2C_GetFlagStatus(I2C1, I2C_FLAG_BUSY) != RESET){i++;if(i>600) return 0;}I2C_TransferHandling(I2C1, addr1, 1, I2C_SoftEnd_Mode,I2C_Generate_Start_Write);i=0;while(I2C_GetFlagStatus(I2C1, I2C_FLAG_TXIS) == RESET){i++;if(i>600) return 0;}I2C_Senddata(I2C1, addr2);i=0;while(I2C_GetFlagStatus(I2C1, I2C_FLAG_TC) == RESET){i++;if(i>600) return 0;}I2C_TransferHandling(I2C1, addr1, 1, I2C_AutoEnd_Mode, I2C_Generate_Start_Read);i=0;while(I2C_GetFlagStatus(I2C1, I2C_FLAG_RXNE) == RESET){i++;if(i>600) return 0;}data=I2C_Receivedata(I2C1);i=0;while(I2C_GetFlagStatus(I2C1, I2C_FLAG_STOPF) == RESET){i++;if(i>600) return 0;}i=0;while(I2C_GetFlagStatus(I2C1, I2C_FLAG_RXNE) != RESET){i++;if(i>600) return 0;}return(data);
}void ZLG_24C_Write(uint8_t addr1,uint8_t addr2,uint8_t data)//дI2Cº¯Êý
{uint16_t i;while(I2C_GetFlagStatus(I2C1, I2C_FLAG_BUSY) != RESET);I2C_TransferHandling(I2C1, addr1, 2, I2C_AutoEnd_Mode,I2C_Generate_Start_Write);i=0;while(I2C_GetFlagStatus(I2C1, I2C_FLAG_TXIS) == RESET){i++;if(i>600) return;}I2C_Senddata(I2C1, addr2);i=0;while(I2C_GetFlagStatus(I2C1, I2C_FLAG_TXIS) == RESET){i++;if(i>600) return;}I2C_Senddata(I2C1, data);while(I2C_GetFlagStatus(I2C1,I2C_FLAG_STOPF) == RESET);}
void EXTI4_15_IRQHandler(void)
{if(EXTI_GetITStatus(EXTI_Line5)!=RESET){ settableflag(Flag_getkey,0);//riar=1;} EXTI_ClearITPendingBit(EXTI_Line5);//Çå³ýÖжϱê־λ
}
