STM32開發SI4432
單片機源程序如下（發送）:
- #include "led.h"
- #include "delay.h"
- #include "sys.h"
- #include "usart.h"
- #include "spi.h"
- // 0321 注意1：SPI 空閑時為低電平，第二跳邊沿生效 //注意2：SDN直接接DGND算了
- // 注意3：SI4432和STM32要用同一個VCC3.3否則的話收到全為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 中斷狀態
- void SI4432_Init(void) ;
- u8 SI4432_ReadReg(u8 addr) ;
- void SI4432_WriteReg(u8 addr, u8 value) ;
- u8 i;
- u8 SI4432_RxBUFF[100];
- u8 SI4432_RxCount,SI4432_RxLenth;
- u8 ItStatus1,ItStatus2,res;
- int main(void)
- {
- delay_init(); //延時函數初始化
- NVIC_Configuration(); //設置NVIC中斷分組2:2位搶占優先級，2位響應優先級
- uart_init(9600); //串口初始化為9600
- LED_Init(); //LED端口初始化
- SPI1_Init();
- GPIO_SET();
- 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);
- //讀取中斷狀態 清除中斷 釋放 SI4432_NIRQ
- ItStatus1 = SI4432_ReadReg(0x03);
- ItStatus2 = SI4432_ReadReg(0x04);
- //軟件復位
- SI4432_WriteReg(0x07, 0x80); //向0X07地址 寫入0X80 軟件復位
- while ( SI4432_NIRQ == 1);
- //讀取中斷狀態 清除中斷 釋放 SI4432_NIRQ
- ItStatus1 = SI4432_ReadReg(0x03);
- ItStatus2 = SI4432_ReadReg(0x04);
- /////////////////////////開始設置
- // 頻率設置 434
- SI4432_WriteReg(0x75, 0x53);
- SI4432_WriteReg(0x76, 0x64); //
- SI4432_WriteReg(0x77, 0x00);
- // 1.2K bps 發射速率
- 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); //頻率偏差(1.2kbps)
- // 下面的設置根據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
- //前導碼 同步字
- SI4432_WriteReg(0x34, 0X0A); // 發射5字節的Preamble
- SI4432_WriteReg(0x35, 0x2A); // 需要檢測 Preamble
- SI4432_WriteReg(0x33, 0x02);// 同步字3,2 是同步字
- SI4432_WriteReg(0x36, 0x2d); // 同步字為 0x2dd4
- SI4432_WriteReg(0x37, 0xd4);
- SI4432_WriteReg(0x30, 0x8D); // 使能PH+ FIFO模式，高位在前面，使能CRC校驗 CCITTT
- SI4432_WriteReg(0x32, 0x00 );// 禁止幀頭
- SI4432_WriteReg(0x71, 0x63); // 發射不需要 CLK，FiFo ， FSK模式
- //GPIO
- SI4432_WriteReg(0x0b, 0x12); //
- SI4432_WriteReg(0x0c, 0x15); //
- //其他設置
- SI4432_WriteReg(0x09, 0xD7); // 負載電容
- SI4432_WriteReg(0x69, 0x60); //AGC過載
- //發射功率
- SI4432_WriteReg(0x6d, 0x1e);
- //手動打開接收
- SI4432_WriteReg(0x07, 0x05);
- //打開 接收中斷
- SI4432_WriteReg(0x05, 0x03);
- SI4432_WriteReg(0x06, 0x00);
- //清中斷
- ItStatus1 = SI4432_ReadReg(0x03); //read the Interrupt Status1 register
- ItStatus2 = SI4432_ReadReg(0x04); //read the Interrupt Status2 register
- //接收設置
- SI4432_WriteReg(0x08, 0x02);
- SI4432_WriteReg(0x08, 0x00);
- SI4432_WriteReg(0x07, 0x05); //手動打開接收
- /////////////////////////////////
- while(1)
- {
- if( SI4432_NIRQ == 0 ) //如果發生中斷
- {
- delay_ms(50);
- ItStatus1 = SI4432_ReadReg(0x03); //read the Interrupt Status1 register
- ItStatus2 = SI4432_ReadReg(0x04); //read the Interrupt Status2 register
-
- if ( (ItStatus1 & 0x02) == 0x02 )
- {
- SI4432_RxLenth = SI4432_ReadReg(0x4B);
- for (SI4432_RxCount=0;SI4432_RxCount < SI4432_RxLenth;SI4432_RxCount++)
- {
- SI4432_RxBUFF[SI4432_RxCount] = SI4432_ReadReg(0x7F);
- }
- SI4432_RxCount=0;
- SI4432_WriteReg(0x08, 0x02);
- SI4432_WriteReg(0x08, 0x00);
- SI4432_WriteReg(0x07, 0x05); //手動打開接?
- }
- }
- res = SI4432_ReadReg(0x02); delay_ms(50);
- delay_ms(20); printf("res =%02x \n",(unsigned short)res );
- }
- }
- // 讀取寄存器
- u8 SI4432_ReadReg(u8 addr) //讀取寄存器的值
- {
- uint8_t temp=0;
-
- SI4432_NSEL=0;
- SPI1_ReadWriteByte(addr); //發送讀取寄存器地址
- temp=SPI1_ReadWriteByte(0Xff);
- SI4432_NSEL=1;
-
- return temp;
- ……………………
- …………限于本文篇幅 余下代碼請從51黑下載附件…………
所有資料51hei提供下載:
si4432.rar
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2017-7-4 22:59 上傳
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