STM8S103 2.4GHZ 通讯程序

#include "lt8900.h" //参数定义 unsigned char regH = 0, regL = 0; //用于读取spi数据寄存器 unsigned char RBUF[BUFLEN]; //用于存储接受数据包 unsigned char TBUF[BUFLEN]; //用于存储发送数据包 unsigned char tlen = 0; //同步码长度 unsigned char channel=0x20; //设置频道 unsigned char dlen = 0; //延时函数（用示波器测试调整） void delay_10us(void) { unsigned char us = 10; for(; us>0; us--); } void delay_nms(unsigned int ms) { unsigned char i; unsigned int j; for(j=ms; j>0; j--) for(i=100; i>0; i--); } //spi读写一个字节 unsigned char spiReadWrite(unsigned byte) { unsigned char i; for(i=0;i<8;i++) { SPI_MOSI = ((byte & 0x80)>>7); SPI_CLK = 1; //delay_10us(); byte <<= 1; byte |= SPI_MISO; SPI_CLK = 0; //delay_10us(); } return(byte); } //LT读寄存器 void LT_ReadReg(unsigned char reg) { SPI_SS = 0; spiReadWrite(READ | reg); regH = spiReadWrite(0x00); regL = spiReadWrite(0x00); SPI_SS = 1; } //LT写寄存器 void LT_WriteReg(unsigned char reg, unsigned char byteH, unsigned char byteL) { SPI_SS = 0; spiReadWrite(WRITE & reg); spiReadWrite(byteH); spiReadWrite(byteL); SPI_SS = 1; } //SPI IO初始化 void spi_io_Init(void) { //SPI_RST,SPI_SS,SPI_CLK,SPI_MOSI设置为推挽输出模式 //SPI_MISO,SPI_PKT设置为上拉输入模式 //MISO上拉输入 PC_DDR_DDR7 = 0; PC_CR1_C17 = 1; PC_CR2_C27 = 0; PC_ODR_ODR7 = 1; //MOSI推完输出 PC_DDR_DDR6 = 1; PC_CR1_C16 = 1; PC_CR2_C26 = 0; PC_ODR_ODR6 = 0; //CLK推完输出 PC_DDR_DDR5 = 1; PC_CR1_C15 = 1; PC_CR2_C25 = 0; PC_ODR_ODR5 = 0; //SS推完输出 PC_DDR_DDR4 = 1; PC_CR1_C14 = 1; PC_CR2_C24 = 0; PC_ODR_ODR4 = 0; //RST推完输出 PC_DDR_DDR3 = 1; PC_CR1_C13 = 1; PC_CR2_C23 = 0; PC_ODR_ODR3 = 0; //PKT上拉输入 PC_DDR_DDR2 = 0; PC_CR1_C12 = 1; PC_CR2_C22 = 0; PC_ODR_ODR2 = 1; } void LT8900_Init(void) { SPI_RST = 0; delay_nms(1); SPI_RST = 1; //Enable 8900 delay_nms(5);//delay 5ms to let LT8900 stable SPI_CLK = 0; //set SPI clock to low LT_WriteReg(0, 0x6F, 0xE0); LT_WriteReg(1, 0x56, 0x81); LT_WriteReg(2, 0x66, 0x17); LT_WriteReg(4, 0x9C, 0xC9); LT_WriteReg(5, 0x66, 0x37); LT_WriteReg(7, 0x00, 0x00); LT_WriteReg(8, 0x6C, 0x90); LT_WriteReg(9, 0x1f, 0xc0); LT_WriteReg(10, 0x7F, 0xFD); LT_WriteReg(11, 0x00, 0x08); LT_WriteReg(12, 0x00, 0x00); LT_WriteReg(13, 0x48, 0xBD); LT_WriteReg(22, 0x00, 0xff); LT_WriteReg(23, 0x80, 0x05); LT_WriteReg(24, 0x00, 0x67); LT_WriteReg(25, 0x16, 0x59); LT_WriteReg(26, 0x19, 0xE0); LT_WriteReg(27, 0x12, 0x00); LT_WriteReg(28, 0x18, 0x00); LT_WriteReg(32, 0x50, 0x04); LT_WriteReg(33, 0x3f, 0xC7); LT_WriteReg(34, 0x20, 0x00); LT_WriteReg(35, 0x03, 0x20); LT_WriteReg(36, 0x03, 0x80); LT_WriteReg(37, 0x03, 0x80); LT_WriteReg(38, 0x5A, 0x5A); LT_WriteReg(39, 0x03, 0x80); LT_WriteReg(40, 0x44, 0x01); LT_WriteReg(41, 0xe4, 0x00); //PKT设置为低有效 LT_WriteReg(42, 0xFD, 0xB0); LT_WriteReg(43, 0x00, 0x0F); LT_WriteReg(50, 0x00, 0x00); delay_nms(10); //delay 10ms to let LT8900 for operation } void SPI_SendFrame (void) //是否是发送地址的意思？ { unsigned char i; SPI_SS = 0; for (i=0; i<tlen; i++) RBUF[i] = spiReadWrite(TBUF[i]); //spi是全双工的，写的时候也需要读出来 SPI_SS = 1; } void LT_SetSyncWord (void) //设置同步码 { TBUF[0] = 0x24; //reg36 to reg39 TBUF[1] = SYNCWORD_0; TBUF[2] = SYNCWORD_1; TBUF[3] = SYNCWORD_2; TBUF[4] = SYNCWORD_3; TBUF[5] = SYNCWORD_4; TBUF[6] = SYNCWORD_5; TBUF[7] = SYNCWORD_6; TBUF[8] = SYNCWORD_7; tlen = 9; SPI_SendFrame(); } void LT_StartTX(void) //将LT设置为发送模式 { LT_ReadReg(0x07); LT_WriteReg(0x07, 0x01, channel); //D8置位，TX模式 tlen = 0; } void LT_StartRX(void) //将LT设置为接受模式 { LT_ReadReg(0x07); LT_WriteReg(0x07, 0x00, channel+0x80); //D7置位，RX模式 } void LT_StopRTX(void) //停止收发 { LT_ReadReg(0x07); LT_WriteReg(0x07, 0x00, 0x00); } void LT_CleanWFIFO(void) { LT_ReadReg(0x34); LT_WriteReg(0x34, 0x80, 0x00); } void LT_SendPacket(void) { unsigned char i = 0; LT_CleanWFIFO(); //Reset writing FIFO point to 0; if (dlen < 1) return; LT_WriteReg(50, dlen, TBUF[i]); dlen--; i++; while (dlen > 0) { LT_WriteReg(50, TBUF[i], TBUF[i+1]); dlen -= 2; i += 2; } LT_StartTX(); while (SPI_PKT == 0); } void LT_SendByte_test(void) { LT_CleanWFIFO(); LT_WriteReg(50, 11, 0); LT_WriteReg(50, 0x1e, 0x1e); LT_WriteReg(50, 0x1e, 0x1e); LT_WriteReg(50, 0x1e, 0x1e); LT_WriteReg(50, 0x1e, 0x1e); LT_WriteReg(50, 0x1e, 0x1e); //LT_StartTX LT_WriteReg(7, 0x01, 0x20); while (SPI_PKT); delay_nms(10); }