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模块头文件 init.h
#ifndef _API_DEF_
#define _API_DEF_
// 定义 nrf24L01 的接口
// 定义 SPI 的各个引脚
sbit CE = P1^0; // Chip Enable pin signal (output)
sbit CSN = P1^1; // Slave Select pin, (output to CSN, nRF24L01)
sbit IRQ = P1^2; // Interrupt signal, from nRF24L01 (input)
sbit MISO = P1^3; // Master In, Slave Out pin (input)
sbit MOSI = P1^4; // Serial Clock pin, (output)
sbit SCK = P1^5; // Master Out, Slave In pin (output)
// SPI（nRF24l01）相关命令的宏定义
#define READ_REG 0x00 // 读寄存器命令
#define WRITE_REG 0x20 // 写寄存器命令
#define RD_RX_PLOAD 0x61 // 读取接收数据指令
#define WR_TX_PLOAD 0xA0 // 写待发数据指令
#define FLUSH_TX 0xE1 // 冲洗发送 FIFO 指令
#define FLUSH_RX 0xE2 // 冲洗接收 FIFO 指令
#define REUSE_TX_PL 0xE3 // 定义重复装载数据指令
#define NOP 0xFF // Define No Operation, might be used to read status register
// SPI(nRF24L01) registers(addresses)相关寄存器地址的宏定义
#define CONFIG 0x00 // 'Config' register address
#define EN_AA 0x01 // 'Enable Auto Acknowledgment' register address
#define EN_RXADDR 0x02 // 'Enabled RX addresses' register address
#define SETUP_AW 0x03 // 'Setup address width' register address
#define SETUP_RETR 0x04 // 'Setup Auto. Retrans' register address
#define RF_CH 0x05 // 'RF channel' register address
#define RF_SETUP 0x06 // 'RF setup' register address
#define STATUS 0x07 // 'Status' register address
#define OBSERVE_TX 0x08 // 'Observe TX' register address
#define CD 0x09 // 'Carrier Detect' register address
#define RX_ADDR_P0 0x0A // 'RX address pipe0' register address
#define RX_ADDR_P1 0x0B // 'RX address pipe1' register address
#define RX_ADDR_P2 0x0C // 'RX address pipe2' register address
#define RX_ADDR_P3 0x0D // 'RX address pipe3' register address
#define RX_ADDR_P4 0x0E // 'RX address pipe4' register address
#define RX_ADDR_P5 0x0F // 'RX address pipe5' register address
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