问答

今天测一块板子，看丝印写的是IIC通信，但电压实测有6v，看了丝印被厂家磨标了，依稀看出来了一些，但反查失败，不晓得是片子太老了，还是看错了。请教一些各位大佬。 [color=#333333][backcolor=rgb(255, 255, 255)][font="]丝印貌似是0213、V106Y68[/font][/backcolor][/color][color=#333333][backcolor=rgb(255, 255, 255)][font="]8P，芯片挺高的。[/font][/backcolor][/color]

iic中断接收例程中，这个操作是干什么用的 观察寄存器实际还在使能状态，这个个代码看起来没有任何作用，但是不加还不行，为什么 [img]data:image/png;base64,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[/img]

/* send the internal register address to */i2c_data_transmit(I2C0, read_address); /* wait until BTC bit is set */ while(!i2c_flag_get(I2C0, I2C_FLAG_BTC); [b][color=#800080]一直卡在上面[/color][/b] [b][color=#800080]请问什么原因？[/color][/b]

使用GD32F350R系列的开发板，调试iic协议，使用iic0的时候两个开发板可以通信(都使用iic0接口，一个主，一个从)，但是换成iic1就不可以了，不论iic1做主机还是从机都不行。iic1做主机时发现在i2c_master_addressing之后，抓出来的波形只有一个start信号，并没有从机地址的信号发出来[font=Consolas, Courier New, monospace]以下是主机程序：[/font] [backcolor=rgb(255, 255, 255)][font=Consolas, "][color=#808080]#include[/color][color=#0000ff] [/color][color=#a31515][/color] [color=#808080]#include[/color][color=#0000ff] [/color][color=#a31515]"gd32f3x0.h"[/color] [color=#808080]#include[/color][color=#0000ff] [/color][color=#a31515]"gd32f350r_eval.h"[/color] [color=#808080]#define[/color][color=#0000ff] [/color][color=#bd63c5]I2C1_OWN_ADDRESS7[/color][color=#0000ff] [/color][color=#09885a]0x[/color]72 [color=#808080]#define[/color][color=#0000ff] [/color][color=#bd63c5]I2C1_SLAVE_ADDRESS7[/color][color=#0000ff] [/color][color=#09885a]0x[/color]45 [color=#0000ff]uint8_t[/color] i2c_transmitter[16]; [color=#0000ff]void[/color] rcu_config([color=#0000ff]void[/color]); [color=#0000ff]void[/color] gpio_config([color=#0000ff]void[/color]); [color=#0000ff]void[/color] i2c_config([color=#0000ff]void[/color]); [color=#008000]/*![/color] [color=#008000] [/color][color=#0000ff]\brief[/color][color=#008000] main function[/color] [color=#008000] [/color][color=#0000ff]\param[/color][color=#008000][[/color][color=#0000ff]in[/color][color=#008000]] [/color][color=#808080]none[/color] [color=#008000] [/color][color=#0000ff]\param[/color][color=#008000][[/color][color=#0000ff]out[/color][color=#008000]] [/color][color=#808080]none[/color] [color=#008000] [/color][color=#0000ff]\retval[/color][color=#008000] none[/color] [color=#008000]*/[/color] [color=#0000ff]int[/color] main([color=#0000ff]void[/color]) { [color=#0000ff]int[/color] i; gd_eval_com_init([color=#bd63c5]EVAL_COM[/color]); [color=#008000] /* RCU configure */[/color] rcu_config(); [color=#008000] /* GPIO configure */[/color] gpio_config(); [color=#008000] /* I2C configure */[/color] i2c_config(); [color=#0000ff]for[/color](i = 0; i < 16; i++) { i2c_transmitter[i] = i + [color=#09885a]0x[/color]80; } [color=#008000] /* wait until I2C bus is idle */[/color] [color=#0000ff]while[/color](i2c_flag_get(I2C1, I2C_FLAG_I2CBSY)); [color=#008000] /* send a start condition to I2C bus */[/color] i2c_start_on_bus(I2C1); [color=#008000] /* wait until SBSEND bit is set */[/color] [color=#0000ff]while[/color](!i2c_flag_get(I2C1, I2C_FLAG_SBSEND)); [color=#008000] /* send slave address to I2C bus */[/color] i2c_master_addressing(I2C1, [color=#09885a]0x[/color]45, I2C_TRANSMITTER); [color=#008000] /* wait until ADDSEND bit is set */[/color] [color=#0000ff]while[/color](!i2c_flag_get(I2C1, I2C_FLAG_ADDSEND)); [color=#008000] /* clear ADDSEND bit */[/color] i2c_flag_clear(I2C1, I2C_FLAG_ADDSEND); [color=#008000] /* wait until the transmit data buffer is empty */[/color] [color=#0000ff]while[/color](!i2c_flag_get(I2C1, I2C_FLAG_TBE)); printf([color=#a31515]"start to transfer\r\n"[/color]); [color=#0000ff]for[/color](i = 0; i < 16; i++) { [color=#008000] /* data transmission */[/color] i2c_data_transmit(I2C1, i2c_transmitter[i]); [color=#008000] /* wait until the TBE bit is set */[/color] [color=#0000ff]while[/color](!i2c_flag_get(I2C1, I2C_FLAG_TBE)); } [color=#008000] /* send a stop condition to I2C bus */[/color] i2c_stop_on_bus(I2C1); [color=#008000] /* wait until stop condition generate */[/color] [color=#0000ff]while[/color](I2C_CTL0(I2C1) & [color=#09885a]0x[/color]0200); [color=#008000] /* infinite loop */[/color] [color=#0000ff]while[/color](1) { } } [color=#008000]/*![/color] [color=#008000] [/color][color=#0000ff]\brief[/color][color=#008000] enable the peripheral clock[/color] [color=#008000] [/color][color=#0000ff]\param[/color][color=#008000][[/color][color=#0000ff]in[/color][color=#008000]] [/color][color=#808080]none[/color] [color=#008000] [/color][color=#0000ff]\param[/color][color=#008000][[/color][color=#0000ff]out[/color][color=#008000]] [/color][color=#808080]none[/color] [color=#008000] [/color][color=#0000ff]\retval[/color][color=#008000] none[/color] [color=#008000]*/[/color] [color=#0000ff]void[/color] rcu_config([color=#0000ff]void[/color]) { [color=#008000] /* enable GPIOB clock */[/color] rcu_periph_clock_enable(RCU_GPIOB); [color=#008000] /* enable I2C1 clock */[/color] rcu_periph_clock_enable(RCU_I2C1); } [color=#008000]/*![/color] [color=#008000] [/color][color=#0000ff]\brief[/color][color=#008000] configure the GPIO ports[/color] [color=#008000] [/color][color=#0000ff]\param[/color][color=#008000][[/color][color=#0000ff]in[/color][color=#008000]] [/color][color=#808080]none[/color] [color=#008000] [/color][color=#0000ff]\param[/color][color=#008000][[/color][color=#0000ff]out[/color][color=#008000]] [/color][color=#808080]none[/color] [color=#008000] [/color][color=#0000ff]\retval[/color][color=#008000] none[/color] [color=#008000]*/[/color] [color=#0000ff]void[/color] gpio_config([color=#0000ff]void[/color]) { [color=#008000] /* connect PB6 to I2C1_SCL */[/color] gpio_af_set(GPIOB, GPIO_AF_1, GPIO_PIN_10); [color=#008000] /* connect PB7 to I2C1_SDA */[/color] gpio_af_set(GPIOB, GPIO_AF_1, GPIO_PIN_11); [color=#008000] /* configure GPIO pins of I2C1 */[/color] gpio_mode_set(GPIOB, GPIO_MODE_AF, GPIO_PUPD_PULLUP, GPIO_PIN_10); gpio_output_options_set(GPIOB, GPIO_OTYPE_OD, GPIO_OSPEED_50MHZ, GPIO_PIN_10); gpio_mode_set(GPIOB, GPIO_MODE_AF, GPIO_PUPD_PULLUP, GPIO_PIN_11); gpio_output_options_set(GPIOB, GPIO_OTYPE_OD, GPIO_OSPEED_50MHZ, GPIO_PIN_11); } [color=#008000]/*![/color] [color=#008000] [/color][color=#0000ff]\brief[/color][color=#008000] configure the I2C1 and I2C1 interfaces[/color] [color=#008000] [/color][color=#0000ff]\param[/color][color=#008000][[/color][color=#0000ff]in[/color][color=#008000]] [/color][color=#808080]none[/color] [color=#008000] [/color][color=#0000ff]\param[/color][color=#008000][[/color][color=#0000ff]out[/color][color=#008000]] [/color][color=#808080]none[/color] [color=#008000] [/color][color=#0000ff]\retval[/color][color=#008000] none[/color] [color=#008000]*/[/color] [color=#0000ff]void[/color] i2c_config([color=#0000ff]void[/color]) { [color=#008000] /* I2C clock configure */[/color] i2c_clock_config(I2C1, 100000, I2C_DTCY_2); [color=#008000] /* I2C address configure */[/color] i2c_mode_addr_config(I2C1, I2C_I2CMODE_ENABLE, I2C_ADDFORMAT_7BITS, [color=#bd63c5]I2C1_SLAVE_ADDRESS7[/color]); [color=#008000] /* enable I2C1 */[/color] i2c_enable(I2C1); [color=#008000] /* enable acknowledge */[/color] i2c_ack_config(I2C1, I2C_ACK_ENABLE); } [color=#008000]/* retarget the C library printf function to the USART */[/color] [color=#0000ff]int[/color] fputc([color=#0000ff]int[/color] [color=#808080]ch[/color], FILE *[color=#808080]f[/color]) { usart_data_transmit([color=#bd63c5]EVAL_COM[/color], ([color=#0000ff]uint8_t[/color]) ch); [color=#0000ff]while[/color]([color=#2f4f4f]RESET[/color] == usart_flag_get([color=#bd63c5]EVAL_COM[/color], USART_FLAG_TBE)); [color=#0000ff]return[/color] [color=#808080]ch[/color]; } 以下是从机程序： [color=#808080]#include[/color][color=#0000ff] [/color][color=#a31515][/color] [color=#808080]#include[/color][color=#0000ff] [/color][color=#a31515]"gd32f3x0.h"[/color] [color=#808080]#include[/color][color=#0000ff] [/color][color=#a31515]"gd32f350r_eval.h"[/color] [color=#808080]#define[/color][color=#0000ff] [/color][color=#bd63c5]I2C0_OWN_ADDRESS7[/color][color=#0000ff] [/color][color=#09885a]0x[/color]45 [color=#0000ff]uint8_t[/color] i2c_receiver[16]; [color=#0000ff]void[/color] rcu_config([color=#0000ff]void[/color]); [color=#0000ff]void[/color] gpio_config([color=#0000ff]void[/color]); [color=#0000ff]void[/color] i2c_config([color=#0000ff]void[/color]); [color=#008000]/*![/color] [color=#008000] [/color][color=#0000ff]\brief[/color][color=#008000] main function[/color] [color=#008000] [/color][color=#0000ff]\param[/color][color=#008000][[/color][color=#0000ff]in[/color][color=#008000]] [/color][color=#808080]none[/color] [color=#008000] [/color][color=#0000ff]\param[/color][color=#008000][[/color][color=#0000ff]out[/color][color=#008000]] [/color][color=#808080]none[/color] [color=#008000] [/color][color=#0000ff]\retval[/color][color=#008000] none[/color] [color=#008000]*/[/color] [color=#0000ff]int[/color] main([color=#0000ff]void[/color]) { [color=#0000ff]int[/color] i; gd_eval_com_init([color=#bd63c5]EVAL_COM[/color]); [color=#008000] /* RCU configure */[/color] rcu_config(); [color=#008000] /* GPIO configure */[/color] gpio_config(); [color=#008000] /* I2C configure */[/color] i2c_config(); i = 0; printf([color=#a31515]"start to wait\r\n"[/color]); [color=#008000] /* wait until ADDSEND bit is set */[/color] [color=#0000ff]while[/color](!i2c_flag_get(I2C0, I2C_FLAG_ADDSEND)); [color=#008000] /* clear ADDSEND bit */[/color] printf([color=#a31515]"address match\r\n"[/color]); i2c_flag_clear(I2C0, I2C_FLAG_ADDSEND); printf([color=#a31515]"receive:\r\n"[/color]); [color=#0000ff]for[/color](i = 0; i < 16; i++) { [color=#008000] /* wait until the RBNE bit is set */[/color] [color=#0000ff]while[/color](!i2c_flag_get(I2C0, I2C_FLAG_RBNE)); [color=#008000] /* read a data byte from I2C_DATA */[/color] i2c_receiver[i] = i2c_data_receive(I2C0); printf([color=#a31515]"%x "[/color], i2c_receiver[i]); } [color=#008000] /* wait until the STPDET bit is set */[/color] [color=#0000ff]while[/color](!i2c_flag_get(I2C0, I2C_FLAG_STPDET)); [color=#008000] /* clear the STPDET bit */[/color] i2c_enable(I2C0); printf([color=#a31515]"\n"[/color]); [color=#0000ff]while[/color](1) { } } [color=#008000]/*![/color] [color=#008000] [/color][color=#0000ff]\brief[/color][color=#008000] enable the peripheral clock[/color] [color=#008000] [/color][color=#0000ff]\param[/color][color=#008000][[/color][color=#0000ff]in[/color][color=#008000]] [/color][color=#808080]none[/color] [color=#008000] [/color][color=#0000ff]\param[/color][color=#008000][[/color][color=#0000ff]out[/color][color=#008000]] [/color][color=#808080]none[/color] [color=#008000] [/color][color=#0000ff]\retval[/color][color=#008000] none[/color] [color=#008000]*/[/color] [color=#0000ff]void[/color] rcu_config([color=#0000ff]void[/color]) { [color=#008000] /* enable GPIOB clock */[/color] rcu_periph_clock_enable(RCU_GPIOB); [color=#008000] /* enable I2C0 clock */[/color] rcu_periph_clock_enable(RCU_I2C0); } [color=#008000]/*![/color] [color=#008000] [/color][color=#0000ff]\brief[/color][color=#008000] configure the GPIO ports[/color] [color=#008000] [/color][color=#0000ff]\param[/color][color=#008000][[/color][color=#0000ff]in[/color][color=#008000]] [/color][color=#808080]none[/color] [color=#008000] [/color][color=#0000ff]\param[/color][color=#008000][[/color][color=#0000ff]out[/color][color=#008000]] [/color][color=#808080]none[/color] [color=#008000] [/color][color=#0000ff]\retval[/color][color=#008000] none[/color] [color=#008000]*/[/color] [color=#0000ff]void[/color] gpio_config([color=#0000ff]void[/color]) { [color=#008000] /* connect PB6 to I2C0_SCL */[/color] gpio_af_set(GPIOB, GPIO_AF_1, GPIO_PIN_6); [color=#008000] /* connect PB7 to I2C0_SDA */[/color] gpio_af_set(GPIOB, GPIO_AF_1, GPIO_PIN_7); [color=#008000] /* configure GPIO pins of I2C0 */[/color] gpio_mode_set(GPIOB, GPIO_MODE_AF, GPIO_PUPD_PULLUP, GPIO_PIN_6); gpio_output_options_set(GPIOB, GPIO_OTYPE_OD, GPIO_OSPEED_50MHZ, GPIO_PIN_6); gpio_mode_set(GPIOB, GPIO_MODE_AF, GPIO_PUPD_PULLUP, GPIO_PIN_7); gpio_output_options_set(GPIOB, GPIO_OTYPE_OD, GPIO_OSPEED_50MHZ, GPIO_PIN_7); } [color=#008000]/*![/color] [color=#008000] [/color][color=#0000ff]\brief[/color][color=#008000] configure the I2C0 interface[/color] [color=#008000] [/color][color=#0000ff]\param[/color][color=#008000][[/color][color=#0000ff]in[/color][color=#008000]] [/color][color=#808080]none[/color] [color=#008000] [/color][color=#0000ff]\param[/color][color=#008000][[/color][color=#0000ff]out[/color][color=#008000]] [/color][color=#808080]none[/color] [color=#008000] [/color][color=#0000ff]\retval[/color][color=#008000] none[/color] [color=#008000]*/[/color] [color=#0000ff]void[/color] i2c_config([color=#0000ff]void[/color]) { [color=#008000] /* I2C clock configure */[/color] i2c_clock_config(I2C0, 100000, I2C_DTCY_2); [color=#008000] /* I2C address configure */[/color] i2c_mode_addr_config(I2C0, I2C_I2CMODE_ENABLE, I2C_ADDFORMAT_7BITS, [color=#bd63c5]I2C0_OWN_ADDRESS7[/color]); [color=#008000] /* enable I2C0 */[/color] i2c_enable(I2C0); [color=#008000] /* enable acknowledge */[/color] i2c_ack_config(I2C0, I2C_ACK_ENABLE); } [color=#008000]/* retarget the C library printf function to the USART */[/color] [color=#0000ff]int[/color] fputc([color=#0000ff]int[/color] [color=#808080]ch[/color], FILE *[color=#808080]f[/color]) { usart_data_transmit([color=#bd63c5]EVAL_COM[/color], ([color=#0000ff]uint8_t[/color]) ch); [color=#0000ff]while[/color]([color=#2f4f4f]RESET[/color] == usart_flag_get([color=#bd63c5]EVAL_COM[/color], USART_FLAG_TBE)); [color=#0000ff]return[/color] [color=#808080]ch[/color]; } [/font][/backcolor] [font=Consolas, Courier New, monospace][backcolor=rgb(255, 255, 255)]按照我的理解，主机不论是否有从机存在，应该必定会有从机地址发出来的信号，有ACK回应那么说明从机识别成功。[/backcolor][/font] [font=Consolas, Courier New, monospace][backcolor=rgb(255, 255, 255)]我的iic1的SCL和SDA都外加了上拉电阻到3.3V。[/backcolor][/font] [font=Consolas, Courier New, monospace][backcolor=rgb(255, 255, 255)]iic1是否有什么需要特殊处理的地方？是否是管脚不对？我从例程里查看它使用iic1的时候也是使用的PB10和PB11[/backcolor][/font]

[backcolor=rgb(255, 255, 255)][font=Consolas, "][size=13px][color=#0000ff]使用GD的硬件IIC通讯，代码用STM32的，能读但不能写，表现为写8个字节(一页)数据后时钟没办法恢复到高电平状态，咨询一下大家有没有比较通用的方法：[/color] [color=#0000ff] [/color] [color=#0000ff]定位到应该是以上代码中不能使GD的IIC正常STOP，STM32和HK32都正常：[/color] [color=#0000ff]void[/color] [color=#795e26]I2C_EE_WaitEepromStandbyState2[/color]([color=#0000ff]void[/color]) { [color=#795e26]I2C_GenerateSTOP[/color]([color=#0000ff]EEPROM_I2Cx[/color], [color=#0070c1]ENABLE[/color]); [color=#af00db]return[/color]; [color=#267f99]vu16[/color] [color=#001080]SR1_Tmp[/color] = [color=#098658]0[/color]; [color=#af00db]do[/color] { [color=#008000]/* 发送起始信号 */[/color] [color=#795e26]I2C_GenerateSTART[/color]([color=#0000ff]EEPROM_I2Cx[/color], [color=#0070c1]ENABLE[/color]); [color=#008000]/* 读 I2C1 SR1 寄存器 */[/color] [color=#001080]SR1_Tmp[/color] = [color=#795e26]I2C_ReadRegister[/color]([color=#0000ff]EEPROM_I2Cx[/color], I2C_Register_SR1); [color=#008000]/* 发送 EEPROM 地址 + 写方向 */[/color] [color=#795e26]I2C_Send7bitAddress[/color]([color=#0000ff]EEPROM_I2Cx[/color], [color=#001080]EEPROM_ADDRESS[/color], I2C_Direction_Transmitter); } [color=#008000]// SR1 位 1 ADDR：1 表示地址发送成功，0 表示地址发送没有结束[/color] [color=#008000]// 等待地址发送成功[/color] [color=#af00db]while[/color] (!([color=#795e26]I2C_ReadRegister[/color]([color=#0000ff]EEPROM_I2Cx[/color], I2C_Register_SR1) & [color=#098658]0x0002[/color])); [color=#008000]/* 清除 AF 位 */[/color] [color=#795e26]I2C_ClearFlag[/color]([color=#0000ff]EEPROM_I2Cx[/color], I2C_FLAG_AF); [color=#008000]/* 发送停止信号 */[/color] [color=#795e26]I2C_GenerateSTOP[/color]([color=#0000ff]EEPROM_I2Cx[/color], [color=#0070c1]ENABLE[/color]); } [/size][/font][/backcolor]

各位好，第一次调试芯圣芯片，893650芯片，代码模块库例程里IIC重映射到P0.0、P0.1，SCL_MAP=0XC0,SDA_MAP=0XC1，这个C是怎么来的，哪里有说明文档，为何不是00，01？INT0例程里，INT0映射到P1.0，INT0_MAP=0X08，这个为何不是0x10?按芯片手册里串口映射配置寄存器的写法，不是应该高位是PORT口，低位是Pin口吗？这个赋值规则都不一样，搞不来，有芯圣原厂技术的吗？求支招，谢谢。

求例程！！！

#define IIC_SDA P16 #define IIC_SCL P15 #define READ_SDA P1CON &= 0xbf #define SDA_OUT() P1CON |= 0x40,P1PH |=0x40 #define SDA_IN() P1CON &= 0xbf,P1PH |=0x40 #define ADDR_PLF2105D 0x50 void delay_us( uint us) { uint x; for(x=us;x>0;x--); } void delay_ms(u16 nms) { u32 i; for(i=0;i250) { IIC_Stop(); return 1; } } IIC_SCL=0;//时钟输出0 return 0; } //产生ACK应答 void IIC_Ack(void) { IIC_SCL=0; SDA_OUT(); IIC_SDA=0; delay_us(6); IIC_SCL=1; delay_us(6); IIC_SCL=0; } //不产生ACK应答 void IIC_NAck(void) { IIC_SCL=0; SDA_OUT(); IIC_SDA=1; delay_us(6); IIC_SCL=1; delay_us(6); IIC_SCL=0; } //IIC发送一个字节 //返回从机有无应答 //1，有应答 //0，无应答 void IIC_Send_Byte(uchar txd) { uchar t; SDA_OUT(); IIC_SCL=0;//拉低时钟开始数据传输 for(t=0;t<8;t++) { IIC_SDA=(txd&0x80)>>7; txd<<=1; delay_us(6); //对TEA5767这三个延时都是必须的 IIC_SCL=1; delay_us(6); IIC_SCL=0; delay_us(6); } } //读1个字节，ack=1时，发送ACK，ack=0，发送nACK uchar IIC_Read_Byte(uchar ack) { unsigned char i,receive=0; SDA_IN();//SDA设置为输入 for(i=0;i<8;i++ ) { IIC_SCL=0; delay_us(32); IIC_SCL=1; receive<<=1; if(READ_SDA)receive++; delay_us(16); } if (!ack) IIC_NAck();//发送nACK else IIC_Ack(); //发送ACK return receive; } //IIC连续写 //addr:器件地址 //reg:寄存器地址 //len:写入长度 //buf:数据区 //返回值:0,正常 // 其他,错误代码 uchar IIC_Write_Len(uchar addr,uchar len,uchar *buf) { uchar i; IIC_Start(); IIC_Send_Byte((addr<<1)|0);//发送器件地址+写命令 if(IIC_Wait_Ack()) //等待应答 { IIC_Stop(); return 1; } for(i=0;i

[i=s] 本帖最后由 415755665 于 2021-1-22 00:15 编辑 [/i] 1、32位 价格在2块到3块，QFN32 8K + 32K ,FLASH，M0内核，起码3组可以独立工作的串口，参考HR8P506的MCU2、触摸IC: 价格要求在0.8-1.2左右 16引脚以及以上，4K FLASH以上，带从IIC 3、普通MCU：价格要求在0.5-1块左右，8K FLASH，带从IIC，带一组串口

GD32F103的IIC模块在进行eeprom读取的时候，当读取的字节数为2时，需要将I2C_CTL0的POAP置为1；POAP的定义如下： 0：ACKEN位决定对当前正在接收的字节发送ACK; 1: ACKEN位决定是否对下一个字节发送ACK. 我的理解时：当读取的字节数为2时，该位置1，表示接收第一个字节后，发送ACK;接收第二个字节后，不发送ACK。这样就能保证时序的正确性。 不知道各位大佬是如何理解的，请赐教。谢谢！ 代码如下： void eeprom_buffer_read(uint8_t* p_buffer, uint8_t read_address, uint16_t number_of_byte) { /* wait until I2C bus is idle */ while(i2c_flag_get(I2C0, I2C_FLAG_I2CBSY)); if(2 == number_of_byte) { i2c_ackpos_config(I2C0,I2C_ACKPOS_NEXT); //如果接收的的字节数等于2，则将将I2C_CTL0的POAP置为1。 } /* send a start condition to I2C bus */ i2c_start_on_bus(I2C0); /* wait until SBSEND bit is set */ while(!i2c_flag_get(I2C0, I2C_FLAG_SBSEND)); /* send slave address to I2C bus */ i2c_master_addressing(I2C0, eeprom_address, I2C_TRANSMITTER); /* wait until ADDSEND bit is set */ while(!i2c_flag_get(I2C0, I2C_FLAG_ADDSEND)); /* clear the ADDSEND bit */ i2c_flag_clear(I2C0,I2C_FLAG_ADDSEND); /* wait until the transmit data buffer is empty */ while(SET != i2c_flag_get( I2C0 , I2C_FLAG_TBE)); /* enable I2C0*/ i2c_enable(I2C0); /* send the EEPROM's internal address to write to */ i2c_data_transmit(I2C0, read_address); /* wait until BTC bit is set */ while(!i2c_flag_get(I2C0, I2C_FLAG_BTC)); /* send a start condition to I2C bus */ i2c_start_on_bus(I2C0); /* wait until SBSEND bit is set */ while(!i2c_flag_get(I2C0, I2C_FLAG_SBSEND)); /* send slave address to I2C bus */ i2c_master_addressing(I2C0, eeprom_address, I2C_RECEIVER); if(number_of_byte < 3){ /* disable acknowledge */ i2c_ack_config(I2C0,I2C_ACK_DISABLE); } /* wait until ADDSEND bit is set */ while(!i2c_flag_get(I2C0, I2C_FLAG_ADDSEND)); /* clear the ADDSEND bit */ i2c_flag_clear(I2C0,I2C_FLAG_ADDSEND); if(1 == number_of_byte){ /* send a stop condition to I2C bus */ i2c_stop_on_bus(I2C0); } /* while there is data to be read */ while(number_of_byte){ if(3 == number_of_byte){ /* wait until BTC bit is set */ while(!i2c_flag_get(I2C0, I2C_FLAG_BTC)); /* disable acknowledge */ i2c_ack_config(I2C0,I2C_ACK_DISABLE); } if(2 == number_of_byte){ /* wait until BTC bit is set */ while(!i2c_flag_get(I2C0, I2C_FLAG_BTC)); /* send a stop condition to I2C bus */ i2c_stop_on_bus(I2C0); } /* wait until the RBNE bit is set and clear it */ if(i2c_flag_get(I2C0, I2C_FLAG_RBNE)){ /* read a byte from the EEPROM */ *p_buffer = i2c_data_receive(I2C0); /* point to the next location where the byte read will be saved */ p_buffer++; /* decrement the read bytes counter */ number_of_byte--; } } /* wait until the stop condition is finished */ while(I2C_CTL0(I2C0)&0x0200); /* enable acknowledge */ i2c_ack_config(I2C0,I2C_ACK_ENABLE); i2c_ackpos_config(I2C0,I2C_ACKPOS_CURRENT); }

主MCU发送多个字节从MCU可以通过中断的方式接收到，主机接收从MCU数据时前面会多一个字节，如2B 中间数据正确，最后几个字节也是错的，求帮忙分析一下，感谢

我是一个新手，我IIC程序都编译成功了，DSView捕获波形的时候SDA没有波形，应该是没有往里面写入寄存器地址和数据，如果往地址0x02写入0xaa,不知道怎么往里写入.[img][/img]

最近在用IIC方式读取磁力计数据，因为在单片机的一个IIC上需要连接两个MPU9250模块，所以其中一个磁力计直接使用单片机IIC读取，可以正常读取数据，并且更新；另外有一个磁力计使用主控IIC去读取磁力计，读取的数据都为零，并且更新速度特别慢，甚至是五六秒才更新一次，设置了延时，每一次读取数据读取一位，并判断了ST1和ST2标志位，没有判断标志位时，还能读取数据，但是有好几次数据读出来一样，感觉更新比较慢，网上说磁力计的更新速度最大为100hz，并没有在寄存器手册中找到说明；遇到的问题有点多，请大佬帮助解答一下，感激不尽{:handshake:}