I2C通讯规则I2C总线包括两根信号线:SDA(串行数据线)和SCL(串行时钟线)。这两根信号线共用一个总线,因此在总线上可以连接多个设备。在I2C总线上,每个设备都有,21ic电子技术开发论坛
while(I2C_CTL0(I2C0)&0x0200); /* enable acknowledge */ i2c_ack_config(I2C0, I2C_ACK_ENABLE); i2c_ackpos_config(I2C0, I2C_ACKPOS_CURRENT); } ④写寄存器操作: void I2C0_Byte_Write(uint8_t* P_buffer, uint8_t write_address) { uint8_t i; /* wait until I2C bus is idle */ ...
i2c_ack_config(I2Cx, I2C_ACK_DISABLE); /* enable I2Cx */ i2c_enable(I2Cx); } 时钟及 GPIO 引脚配置 时钟及GPIO引脚配置如代码清单I2C时钟及GPIO引脚配置所示,在例程中PB6、PB7引脚需要配置为复用开漏模式。 void GPIO_Configuration_I2C(uint32_t I2Cx) ...
the read bytes counter */ number_Bytes--; } } while(I2C_CTL0(I2Cx)&0x0200) { if((I2C_Timeout--) == 0) { Resume_IIC(I2C_LONG_TIMEOUT,I2Cx); return I2C_FAIL; } }/* enable acknowledge */ i2c_ack_config(I2Cx,I2C_ACK_ENABLE); i2c_ackpos_config(I2Cx,I2C_ACKPOS_CURRENT);...
i2c_ack_config(I2Cx, I2C_ACK_DISABLE); /* enable I2Cx */ i2c_enable(I2Cx); } 时钟及 GPIO 引脚配置 时钟及GPIO引脚配置如代码清单I2C时钟及GPIO引脚配置所示,在例程中PB6、PB7引脚需要配置为复用开漏模式。 void GPIO_Configuration_I2C(uint32_t I2Cx) ...
acknowledge */i2c_ack_config(I2Cx,I2C_ACK_ENABLE);i2c_ackpos_config(I2Cx,I2C_ACKPOS_CURRENT)...
{ i2c_ackpos_config(I2Cx,I2C_ACKPOS_NEXT); } i2c_start_on_bus(I2Cx); I2C_Timeout = I2C_SHORT_TIMEOUT; while(!i2c_flag_get(I2Cx, I2C_FLAG_SBSEND)) { if((I2C_Timeout--) == 0) { Resume_IIC(I2C_LONG_TIMEOUT,I2Cx); return I2C_FAIL; } } i2c_master_addressing(I2Cx, ...
Note: The EV6_3 software sequence must complete before the current byte end of transfer. To ensure this, the interrupts should be masked between ADDR clearing and STOP/START programming. Case of two bytes to be received: – Set POS and ACK – Wait for the ADDR flag to be set – Clear...
《嵌入式 – GD32开发实战指南》第21章 I2C,I2C总线是PHLIPS公司推出的一种双线式半双工串行总线,是具备多主机系统所需的总线裁决
acknowledge */i2c_ack_config(I2C0,I2C_ACK_ENABLE);i2c_ackpos_config(I2C0,I2C_ACKPOS_CURRENT);read_false:if(i2c_false_flag==true){*pbuf=0x00;/* send a stop condition to I2C bus */i2c_stop_on_bus(I2C0);/* wait un