nRF24LE1.zip

//------------------------------------------------------------------------------------- #include "reg24le1.h" #include "stdint.h" #include "stdbool.h" #include "zho_i2c.h" #include "zho_delay.h" #include "zho_io.h" #include <intrins.h> //------------------------------------------------------------------------------------- //定义I2C地址 //------------------------------------------------------------------------------------- #define SlaveAddress (0x30 << 1) //------------------------------------------------------------------------------------- //定义IO口 //------------------------------------------------------------------------------------- #define SCL P16 #define SDA P15 #define SCL_OUTPUT() zho_output_P16() #define SDA_OUTPUT() zho_output_P15() #define SDA_INPUT() zho_input_P15() //------------------------------------------------------------------------------------- //连续读出时的数据缓冲区 //------------------------------------------------------------------------------------- uint8_t zho_i2c_buf[6]; //------------------------------------------------------------------------------------- //延时 //------------------------------------------------------------------------------------- void zho_i2c_wait() { _nop_(); _nop_(); _nop_(); _nop_(); _nop_(); _nop_(); _nop_(); _nop_(); _nop_(); _nop_(); _nop_(); _nop_(); _nop_(); _nop_(); _nop_(); _nop_(); _nop_(); _nop_(); _nop_(); _nop_(); } //------------------------------------------------------------------------------------- //I2C Start //------------------------------------------------------------------------------------- void zho_i2c_start() { SCL_OUTPUT(); //SCL的IO设置为输出 SDA_OUTPUT(); //SDA的IO设置为输出 zho_i2c_wait(); //延时，避免和上一次的stop间隔太近 SDA = 1; //拉高数据线 SCL = 1; //拉高时钟线 zho_i2c_wait(); //延时 SDA = 0; //产生下降沿 zho_i2c_wait(); //延时 SCL = 0; //拉低时钟线 } //------------------------------------------------------------------------------------- //I2C Stop //------------------------------------------------------------------------------------- void zho_i2c_stop() { SDA_OUTPUT(); //SDA的IO设置为输出 SDA = 0; //拉低数据线 SCL = 1; //拉高时钟线 zho_i2c_wait(); //延时 SDA = 1; //产生上升沿 zho_i2c_wait(); //延时 } //------------------------------------------------------------------------------------- //I2C ACK //------------------------------------------------------------------------------------- void zho_i2c_send_ack(bit ack) { SDA_OUTPUT(); //SDA的IO设置为输出 SDA = ack; //写应答信号 SCL = 1; //拉高时钟线 zho_i2c_wait(); //延时 SCL = 0; //拉低时钟线 zho_i2c_wait(); //延时 } //------------------------------------------------------------------------------------- //I2C RecvACK //------------------------------------------------------------------------------------- uint8_t zho_i2c_recv_ack(void) { SDA_INPUT(); //SDA的IO设置为输入 SCL = 1; //拉高时钟线 zho_i2c_wait(); //延时 CY = SDA; //读应答信号 SCL = 0; //拉低时钟线 zho_i2c_wait(); //延时 return CY; //返回 } //------------------------------------------------------------------------------------- //I2C Send Byte //------------------------------------------------------------------------------------- void zho_i2c_send_byte(uint8_t dat) { uint8_t i; SDA_OUTPUT(); //SDA的IO设置为输出 for(i = 0; i < 8; i++) //8位计数器 { dat <<= 1; //移出数据的最高位 SDA = CY; //送数据口 SCL = 1; //拉高时钟线 zho_i2c_wait(); //延时 SCL = 0; //拉低时钟线 zho_i2c_wait(); //延时 } zho_i2c_recv_ack(); //读取回应 } //------------------------------------------------------------------------------------- //I2C Recv Byte //------------------------------------------------------------------------------------- uint8_t zho_i2c_recv_byte() { uint8_t i; uint8_t dat = 0; SDA_INPUT(); //SDA的IO设置为输入 SDA = 1; //使能内部上拉,准备读取数据, for(i = 0; i < 8; i++) //8位计数器 { dat <<= 1; SCL = 1; //拉高时钟线 zho_i2c_wait(); //延时 dat |= SDA; //读数据 SCL = 0; //拉低时钟线 zho_i2c_wait(); //延时 } return dat; //返回 } //------------------------------------------------------------------------------------- //写寄存器 //------------------------------------------------------------------------------------- void zho_i2c_write_reg(uint8_t REG_Address, uint8_t REG_data) { zho_i2c_start(); //起始信号 zho_i2c_send_byte(SlaveAddress); //发送设备地址+写信号 zho_i2c_send_byte(REG_Address); //内部寄存器地址，请参考中文pdf zho_i2c_send_byte(REG_data); //内部寄存器数据，请参考中文pdf zho_i2c_stop(); //发送停止信号 } //------------------------------------------------------------------------------------- //读寄存器 //------------------------------------------------------------------------------------- uint8_t zho_i2c_read_reg(uint8_t REG_Address) { uint8_t REG_data; zho_i2c_start(); //起始信号 zho_i2c_send_byte(SlaveAddress); //发送设备地址+写信号 zho_i2c_send_byte(REG_Address); //发送存储单元地址 zho_i2c_start(); //起始信号 zho_i2c_send_byte(SlaveAddress + 1); //发送设备地址+读信号 REG_data = zho_i2c_recv_byte(); //读出寄存器数据 zho_i2c_send_ack(1); //发送回应 zho_i2c_stop(); //停止信号 return REG_data; //返回 } //------------------------------------------------------------------------------------- //连续读出6个寄存器，数据存放在zho_i2c_buf[] //------------------------------------------------------------------------------------- void zho_i2c_read_6_reg(uint8_t REG_Address) { uint8_t i; zho_i2c_start(); //起始信号 zho_i2c_send_byte(SlaveAddress); //发送设备地址+写信号 zho_i2c_send_byte(REG_Address); //发送起始存储单元地址 zho_i2c_start(); //起始信号 zho_i2c_send_byte(SlaveAddress + 1); //发送设备地址+读信号 for(i = 0; i < 6; i++) //连续读取6个地址数据 { zho_i2c_buf[i] = zho_i2c_recv_byte(); //存储数据 if (i == 5) {zho_i2c_send_ack(1);} //最后一个数据需要回NOACK else {zho_i2c_send_ack(0);} //回应ACK } zho_i2c_stop(); //停止信号 } //-------------------------------------------------------------------------------------