分享调试SI4432的一些经验和程序 -

#include "led.h"
#include "delay.h"
#include "sys.h"
#include "usart.h"
#include "spi.h"
// 0321 注意1：SPI 空闲时为低电平，第二跳边沿生效 //注意2：SDN直接接DGND算了
// 注意3：SI4432和STM32要用同一个VCC3.3否则的话收到全为0
#define SI4432_NSEL PAout(4) //SI4432_NSEL 使能
#define SI4432_SDN PCout(4) //SI4432_SDN 使能
#define SI4432_NIRQ PCin(5) //SI4432_NIRQ 中断状态
void SI4432_Init(void) ;
u8 SI4432_ReadReg(u8 addr) ;
void SI4432_WriteReg(u8 addr, u8 value) ;
unsigned char i;
u8 ItStatus1,ItStatus2,res;
int main(void)
{
delay_init(); //延时函数初始化
NVIC_Configuration(); //设置NVIC中断分组2:2位抢占优先级，2位响应优先级
uart_init(9600); //串口初始化为9600
LED_Init(); //LED端口初始化
SPI1_Init();
GPIOSet();
SI4432_NSEL=0;
delay_ms(600);
res = SI4432_ReadReg(0x00);
delay_ms(20); printf("res =%02x \n",(unsigned short)res );
res = SI4432_ReadReg(0x01);
delay_ms(20); printf("res =%02x \n",(unsigned short)res );
res = SI4432_ReadReg(0x02);
delay_ms(20); printf("res =%02x \n",(unsigned short)res );
delay_ms(1000);
//读取中断状态清除中断释放 SI4432_NIRQ
ItStatus1 = SI4432_ReadReg(0x03);
ItStatus2 = SI4432_ReadReg(0x04);
//软件复位
SI4432_WriteReg(0x07, 0x80); //向0X07地址写入0X80 软件复位
while ( SI4432_NIRQ == 1);
//读取中断状态清除中断释放 SI4432_NIRQ
ItStatus1 = SI4432_ReadReg(0x03);
ItStatus2 = SI4432_ReadReg(0x04);
/////////////////////////开始设置
// 频率设置 434
SI4432_WriteReg(0x75, 0x53);
SI4432_WriteReg(0x76, 0x64); //
SI4432_WriteReg(0x77, 0x00);
// 1.2K bps 发射速率
SI4432_WriteReg(0x2a, 0x14);
SI4432_WriteReg(0x6e, 0x09);
SI4432_WriteReg(0x6f, 0xd5);
SI4432_WriteReg(0x70, 0x2c);//
//SpiWriteRegister(0x72, 0x48); //(9.6kbps)
SI4432_WriteReg(0x72, 0x38); //频率偏差(1.2kbps)
// 下面的设置根据Silabs 的Excel (9.6 kbps, deviation: 45 kHz, channel filter BW: 102.2 kHz
SI4432_WriteReg(0x1C, 0x1b); //write 0x1E to the IF Filter Bandwidth register
SI4432_WriteReg(0x20, 0x83); //write 0xD0 to the Clock Recovery Oversampling Ratio register
SI4432_WriteReg(0x21, 0xc0); //write 0x00 to the Clock Recovery Offset 2 register
SI4432_WriteReg(0x22, 0x13); //write 0x9D to the Clock Recovery Offset 1 register
SI4432_WriteReg(0x23, 0xa9); //write 0x49 to the Clock Recovery Offset 0 register
SI4432_WriteReg(0x24, 0x00); //write 0x00 to the Clock Recovery Timing Loop Gain 1 register
SI4432_WriteReg(0x25, 0x03); //write 0x24 to the Clock Recovery Timing Loop Gain 0 register
SI4432_WriteReg(0x1D, 0x40); //write 0x40 to the AFC Loop Gearshift Override register
SI4432_WriteReg(0x1E, 0x0A); //write 0x0A to the AFC Timing Control register
SI4432_WriteReg(0x2A, 0x14); //write 0x20 to the AFC Limiter register
//前导码同步字
SI4432_WriteReg(0x34, 0X0A); // 发射5字节的Preamble
SI4432_WriteReg(0x35, 0x2A); // 需要检测 Preamble
SI4432_WriteReg(0x33, 0x02);// 同步字3,2 是同步字
SI4432_WriteReg(0x36, 0x2d); // 同步字为 0x2dd4
SI4432_WriteReg(0x37, 0xd4);
SI4432_WriteReg(0x30, 0x8D); // 使能PH+ FIFO模式，高位在前面，使能CRC校验 CCITTT
SI4432_WriteReg(0x32, 0x00 );// 禁止帧头
SI4432_WriteReg(0x71, 0x63); // 发射不需要 CLK，FiFo ， FSK模式
//GPIO
SI4432_WriteReg(0x0b, 0x12); //
SI4432_WriteReg(0x0c, 0x15); //
//其他设置
SI4432_WriteReg(0x09, 0xD7); // 负载电容
SI4432_WriteReg(0x69, 0x60); //AGC过载
//发射功率
SI4432_WriteReg(0x6d, 0x1e);
//手动打开接收
SI4432_WriteReg(0x07, 0x05);
//打开接收中断
SI4432_WriteReg(0x05, 0x03);
SI4432_WriteReg(0x06, 0x00);
//清中断
ItStatus1 = SI4432_ReadReg(0x03); //read the Interrupt Status1 register
ItStatus2 = SI4432_ReadReg(0x04); //read the Interrupt Status2 register
SI4432_WriteReg(0x07, 0x05);//打开接收
SI4432_WriteReg(0x0d, 0xf4);//GPIO2接收数据
while(1)
{
GPIO_SetBits(GPIOB , GPIO_Pin_10);//信号灯
res = SI4432_ReadReg(0x02); delay_ms(20);printf("res =%02x \n",(unsigned short)res );
SI4432_WriteReg(0x07, 0x01); // rf 模块进入Ready 模式
delay_ms(20); // 延时 5ms, 让系统稳定
SI4432_WriteReg(0x3e, 0x08); // 总共发射8个字节的数据
SI4432_WriteReg(0x7F, 0x42);
SI4432_WriteReg(0x7F, 0x42);
SI4432_WriteReg(0x7F, 0x42);
SI4432_WriteReg(0x7F, 0x42);
SI4432_WriteReg(0x7F, 0x42);
SI4432_WriteReg(0x7F, 0x42);
SI4432_WriteReg(0x7F, 0x42);
SI4432_WriteReg(0x7F, 0x42);
SI4432_WriteReg(0x05, 0x04); // 整包数据发射完后，产生中断
SI4432_WriteReg(0x06, 0x00);
ItStatus1 = SI4432_ReadReg(0x03);//清除中断
ItStatus2 = SI4432_ReadReg(0x04);
SI4432_WriteReg(0x07, 0x09);//打开发射
while ( SI4432_NIRQ == 1);
GPIO_ResetBits(GPIOB , GPIO_Pin_10);
//read interrupt status registers to release the interrupt flags
ItStatus1 = SI4432_ReadReg(0x03); printf("ItStatus1 =%02x \n",(unsigned short)ItStatus1 );
ItStatus2 = SI4432_ReadReg(0x04); printf("ItStatus2 =%02x \n",(unsigned short)ItStatus2 );
delay_ms(1000);
}
}
// 读取寄存器
u8 SI4432_ReadReg(u8 addr) //读取寄存器的值
{
uint8_t temp=0;
SI4432_NSEL=0;
SPI1_ReadWriteByte(addr); //发送读取寄存器地址
temp=SPI1_ReadWriteByte(0Xff);
SI4432_NSEL=1;
return temp;
}
//写寄存器
void SI4432_WriteReg(u8 addr, u8 value) //写寄存器
{
SI4432_NSEL=0;
SPI1_ReadWriteByte(addr|0x80);
SPI1_ReadWriteByte(value);
SI4432_NSEL=1;
}

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