📄 89lv51.lst
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217 1 SPI_RW(*pBuf++);
218 1 CSN = 1; // Set CSN high again
219 1 return(status); // return nRF24L01 status byte
220 1 }
221 /**************************************************/
222
223 /**************************************************
224 Function: RX_Mode();
225
226 Description:
227 This function initializes one nRF24L01 device to
228 RX Mode, set RX address, writes RX payload width,
229 select RF channel, datarate & LNA HCURR.
230 After init, CE is toggled high, which means that
231 this device is now ready to receive a datapacket.
232 /**************************************************/
233 void RX_Mode(void)
234 {
235 1 CE=0;
236 1 SPI_Write_Buf(WRITE_REG + RX_ADDR_P0, TX_ADDRESS, TX_ADR_WIDTH); // Use the same address on the RX devi
-ce as the TX device
237 1
238 1 SPI_RW_Reg(WRITE_REG + EN_AA, 0x01); // Enable Auto.Ack:Pipe0
239 1 SPI_RW_Reg(WRITE_REG + EN_RXADDR, 0x01); // Enable Pipe0
C51 COMPILER V7.06 89LV51 03/21/2007 11:35:07 PAGE 5
240 1 SPI_RW_Reg(WRITE_REG + RF_CH, 40); // Select RF channel 40
241 1 SPI_RW_Reg(WRITE_REG + RX_PW_P0, TX_PLOAD_WIDTH); // Select same RX payload width as TX Payload width
242 1 SPI_RW_Reg(WRITE_REG + RF_SETUP, 0x07); // TX_PWR:0dBm, Datarate:2Mbps, LNA:HCURR
243 1 SPI_RW_Reg(WRITE_REG + CONFIG, 0x0f); // Set PWR_UP bit, enable CRC(2 bytes) & Prim:RX. RX_DR enabl
-ed..
244 1
245 1 CE = 1; // Set CE pin high to enable RX device
246 1
247 1 // This device is now ready to receive one packet of 16 bytes payload from a TX device sending to addre
-ss
248 1 // '3443101001', with auto acknowledgment, retransmit count of 10, RF channel 40 and datarate = 2Mbps.
249 1
250 1 }
251 /**************************************************/
252
253 /**************************************************
254 Function: TX_Mode();
255
256 Description:
257 This function initializes one nRF24L01 device to
258 TX mode, set TX address, set RX address for auto.ack,
259 fill TX payload, select RF channel, datarate & TX pwr.
260 PWR_UP is set, CRC(2 bytes) is enabled, & PRIM:TX.
261
262 ToDo: One high pulse(>10us) on CE will now send this
263 packet and expext an acknowledgment from the RX device.
264 /**************************************************/
265 void TX_Mode(void)
266 {
267 1 CE=0;
268 1
269 1 SPI_Write_Buf(WRITE_REG + TX_ADDR, TX_ADDRESS, TX_ADR_WIDTH); // Writes TX_Address to nRF24L01
270 1 SPI_Write_Buf(WRITE_REG + RX_ADDR_P0, TX_ADDRESS, TX_ADR_WIDTH); // RX_Addr0 same as TX_Adr for Auto.Ac
-k
271 1 SPI_Write_Buf(WR_TX_PLOAD, tx_buf, TX_PLOAD_WIDTH); // Writes data to TX payload
272 1
273 1 SPI_RW_Reg(WRITE_REG + EN_AA, 0x01); // Enable Auto.Ack:Pipe0
274 1 SPI_RW_Reg(WRITE_REG + EN_RXADDR, 0x01); // Enable Pipe0
275 1 SPI_RW_Reg(WRITE_REG + SETUP_RETR, 0x1a); // 500us + 86us, 10 retrans...
276 1 SPI_RW_Reg(WRITE_REG + RF_CH, 40); // Select RF channel 40
277 1 SPI_RW_Reg(WRITE_REG + RF_SETUP, 0x07); // TX_PWR:0dBm, Datarate:2Mbps, LNA:HCURR
278 1 SPI_RW_Reg(WRITE_REG + CONFIG, 0x0e); // Set PWR_UP bit, enable CRC(2 bytes) & Prim:TX. MAX_RT & TX
-_DS enabled..
279 1 CE=1;
280 1
281 1 }
282 /**************************************************/
283
284 /**************************************************
285 Function: check_ACK();
286
287 Description:
288 check if have "Data sent TX FIFO interrupt",if TX_DS=1,
289 all led light and after delay 100ms all led close
290 /**************************************************
291 void check_ACK()
292 {
293 uchar test;
294 test=SPI_Read(READ_REG+STATUS); // read register STATUS's
295 test=test&0x20; // check if have Data sent TX FIFO interrupt (TX_DS=1)
296 if(test==0x20) // TX_DS =1
297 {
C51 COMPILER V7.06 89LV51 03/21/2007 11:35:07 PAGE 6
298 P0=0x00; // turn on all led
299 delay100(); // delay 100ms
300 P0=0xff;
301 }
302 }
303 /**************************************************/
304
305 /**************************************************
306 Function: TxData();
307
308 Description:
309 write data x to SBUF
310 /**************************************************/
311 void TxData (uchar x)
312 {
313 1 SBUF=x; // write data x to SBUF
314 1 while(TI==0);
315 1 TI=0;
316 1 }
317 /**************************************************/
318
319 /**************************************************
320 Function: CheckButtons();
321
322 Description:
323 check buttons ,if have press,read the key values,
324 turn on led and transmit it; after transmition,
325 if received ACK, clear TX_DS interrupt and enter RX Mode;
326 turn off the led
327 /**************************************************/
328 void CheckButtons()
329 {
330 1 uchar Temp,xx,Tempi;
331 1
332 1 P0=0xff;
333 1 Temp=P0&KEY; //read key value from port P0
334 1 if (Temp!=KEY)
335 1 {
336 2 delay_ms(10);
337 2 Temp=P0&KEY; // read key value from port P0
338 2 if (Temp!=KEY)
339 2 {
340 3 xx=Temp;
341 3 Tempi=Temp>>1; // Left shift 4 bits
342 3 P0=Tempi; // Turn On the led
343 3 tx_buf[0]=Tempi; // Save to tx_buf[0]
344 3 TX_Mode(); // set TX Mode and transmitting
345 3 TxData(xx); // send data to uart
346 3 //check_ACK(); // if have acknowledgment from RX device,turn on all led
347 3 SPI_RW_Reg(WRITE_REG+STATUS,SPI_Read(READ_REG+STATUS)); // clear interrupt flag(TX_DS)
348 3 delay_ms(500);
349 3 P0=0xff; // Turn off the led
350 3 RX_Mode(); // set receive mode
351 3
352 3 while((P0&KEY)!=KEY);
353 3 }
354 2 }
355 1 }
356 /**************************************************/
357
358 /**************************************************
359 Function: main();
C51 COMPILER V7.06 89LV51 03/21/2007 11:35:07 PAGE 7
360
361 Description:
362 control all subprogrammes;
363 /**************************************************/
364 void main(void)
365 {
366 1 uchar xx;
367 1 init_io(); // Initialize IO port
368 1 Inituart(); // initialize 232 uart
369 1 //init_int0(); // enable int0 interrupt
370 1 RX_Mode(); // set RX mode
371 1 while(1)
372 1 {
373 2 CheckButtons(); // scan key value and transmit
374 2 sta=SPI_Read(STATUS); // read register STATUS's value
375 2 if(RX_DR) // if receive data ready (RX_DR) interrupt
376 2 {
377 3 SPI_Read_Buf(RD_RX_PLOAD,rx_buf,TX_PLOAD_WIDTH);// read receive payload from RX_FIFO buffer
378 3 flag=1;
379 3 }
380 2 if(MAX_RT)
381 2 {
382 3 SPI_RW_Reg(FLUSH_TX,0);
383 3 }
384 2 SPI_RW_Reg(WRITE_REG+STATUS,sta);// clear RX_DR or TX_DS or MAX_RT interrupt flag
385 2 if(flag) // finish received
386 2 {
387 3 flag=0; // set flag=0
388 3 P0=rx_buf[0]; // turn on led
389 3 delay_ms(500);
390 3 P0=0xff; // turn off led
391 3 xx=rx_buf[0]>>1;// right shift 4 bits
392 3 TxData(xx); // send data to uart
393 3 }
394 2 }
395 1 }
396 /**************************************************/
397
398 /**************************************************
399 Function: ISR_int0() interrupt 0;
400
401 Description:
402 if RX_DR=1 or TX_DS or MAX_RT=1,enter this subprogram;
403 if RX_DR=1,read the payload from RX_FIFO and set flag;
404 /**************************************************/
405 void ISR_int0(void) interrupt 0
406 {
407 1 sta=SPI_Read(STATUS); // read register STATUS's value
408 1 if(RX_DR) // if receive data ready (RX_DR) interrupt
409 1 {
410 2 SPI_Read_Buf(RD_RX_PLOAD,rx_buf,TX_PLOAD_WIDTH);// read receive payload from RX_FIFO buffer
411 2 flag=1;
412 2 }
413 1 if(MAX_RT)
414 1 {
415 2 SPI_RW_Reg(FLUSH_TX,0);
416 2 }
417 1 SPI_RW_Reg(WRITE_REG+STATUS,sta);// clear RX_DR or TX_DS or MAX_RT interrupt flag
418 1 }
419 /**************************************************/
420
C51 COMPILER V7.06 89LV51 03/21/2007 11:35:07 PAGE 8
MODULE INFORMATION: STATIC OVERLAYABLE
CODE SIZE = 606 ----
CONSTANT SIZE = ---- ----
XDATA SIZE = ---- ----
PDATA SIZE = ---- ----
DATA SIZE = 47 11
IDATA SIZE = ---- ----
BIT SIZE = ---- ----
END OF MODULE INFORMATION.
C51 COMPILATION COMPLETE. 0 WARNING(S), 0 ERROR(S)
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