📄 89lv51.lst
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209 Description:
210 This function initializes one nRF24L01 device to
211 RX Mode, set RX address, writes RX payload width,
212 select RF channel, datarate & LNA HCURR.
213 After init, CE is toggled high, which means that
214 this device is now ready to receive a datapacket.
215 /**************************************************/
216 void RX_Mode(void)
217 {
218 1 CE=0;
219 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
220 1
221 1 SPI_RW_Reg(WRITE_REG + EN_AA, 0x01); // Enable Auto.Ack:Pipe0
222 1 SPI_RW_Reg(WRITE_REG + EN_RXADDR, 0x01); // Enable Pipe0
223 1 SPI_RW_Reg(WRITE_REG + RF_CH, 40); // Select RF channel 40
224 1 SPI_RW_Reg(WRITE_REG + RX_PW_P0, TX_PLOAD_WIDTH); // Select same RX payload width as TX Payload width
225 1 SPI_RW_Reg(WRITE_REG + RF_SETUP, 0x07); // TX_PWR:0dBm, Datarate:2Mbps, LNA:HCURR
226 1 SPI_RW_Reg(WRITE_REG + CONFIG, 0x0f); // Set PWR_UP bit, enable CRC(2 bytes) & Prim:RX. RX_DR enabl
-ed..
227 1
228 1 CE = 1; // Set CE pin high to enable RX device
229 1
230 1 // This device is now ready to receive one packet of 16 bytes payload from a TX device sending to addre
-ss
231 1 // '3443101001', with auto acknowledgment, retransmit count of 10, RF channel 40 and datarate = 2Mbps.
232 1
233 1 }
234 /**************************************************/
235
236 /**************************************************
237 Function: TX_Mode();
C51 COMPILER V8.05a 89LV51 06/18/2008 21:31:17 PAGE 5
238
239 Description:
240 This function initializes one nRF24L01 device to
241 TX mode, set TX address, set RX address for auto.ack,
242 fill TX payload, select RF channel, datarate & TX pwr.
243 PWR_UP is set, CRC(2 bytes) is enabled, & PRIM:TX.
244
245 ToDo: One high pulse(>10us) on CE will now send this
246 packet and expext an acknowledgment from the RX device.
247 /**************************************************/
248 void TX_Mode(void)
249 {
250 1 CE=0;
251 1
252 1 SPI_Write_Buf(WRITE_REG + TX_ADDR, TX_ADDRESS, TX_ADR_WIDTH); // Writes TX_Address to nRF24L01
253 1 SPI_Write_Buf(WRITE_REG + RX_ADDR_P0, TX_ADDRESS, TX_ADR_WIDTH); // RX_Addr0 same as TX_Adr for Auto.Ac
-k
254 1 SPI_Write_Buf(WR_TX_PLOAD, tx_buf, TX_PLOAD_WIDTH); // Writes data to TX payload
255 1
256 1 SPI_RW_Reg(WRITE_REG + EN_AA, 0x01); // Enable Auto.Ack:Pipe0
257 1 SPI_RW_Reg(WRITE_REG + EN_RXADDR, 0x01); // Enable Pipe0
258 1 SPI_RW_Reg(WRITE_REG + SETUP_RETR, 0x1a); // 500us + 86us, 10 retrans...
259 1 SPI_RW_Reg(WRITE_REG + RF_CH, 40); // Select RF channel 40
260 1 SPI_RW_Reg(WRITE_REG + RF_SETUP, 0x07); // TX_PWR:0dBm, Datarate:2Mbps, LNA:HCURR
261 1 SPI_RW_Reg(WRITE_REG + CONFIG, 0x0e); // Set PWR_UP bit, enable CRC(2 bytes) & Prim:TX. MAX_RT & TX
-_DS enabled..
262 1 CE=1;
263 1
264 1 }
265 /**************************************************/
266
267 /**************************************************
268 Function: check_ACK();
269
270 Description:
271 check if have "Data sent TX FIFO interrupt",if TX_DS=1,
272 all led light and after delay 100ms all led close
273 /**************************************************/
274 void check_ACK()
275 {
276 1 uchar test;
277 1 test=SPI_Read(READ_REG+STATUS); // read register STATUS's
278 1 test=test&0x20; // check if have Data sent TX FIFO interrupt (TX_DS=1)
279 1 if(test==0x20) // TX_DS =1
280 1 {
281 2 delay_ms(200);
282 2 P0=0x00; // turn on all led
283 2 delay_ms(200); // delay 200ms
284 2 P0=0xff;
285 2 }
286 1 }
287 /**************************************************/
288
289 /**************************************************
290 Function: TxData();
291
292 Description:
293 write data x to SBUF
294 /**************************************************/
295 void TxData (uchar x)
296 {
297 1 SBUF=x; // write data x to SBUF
C51 COMPILER V8.05a 89LV51 06/18/2008 21:31:17 PAGE 6
298 1 while(TI==0);
299 1 TI=0;
300 1 }
301 /**************************************************/
302
303 /**************************************************
304 Function: CheckButtons();
305
306 Description:
307 check buttons ,if have press,read the key values,
308 turn on led and transmit it; after transmition,
309 if received ACK, clear TX_DS interrupt and enter RX Mode;
310 turn off the led
311 /**************************************************/
312 void CheckButtons()
313 {
314 1 uchar Temp,Tempi;
315 1
316 1 P0=0xff;
317 1 Temp=P0&KEY; //read key value from port P0
318 1 if (Temp!=KEY)
319 1 {
320 2 delay_ms(10);
321 2 Temp=P0&KEY; // read key value from port P0
322 2 if (Temp!=KEY)
323 2 {
324 3 Tempi=Temp>>1; // Left shift 4 bits
325 3 P0=Tempi; // Turn On the led
326 3 tx_buf[0]=Temp; // Save to tx_buf[0]
327 3 TX_Mode(); // set TX Mode and transmitting
328 3 TxData(Tempi); // send data to uart
329 3 check_ACK(); // if have acknowledgment from RX device,turn on all led
330 3 SPI_RW_Reg(WRITE_REG+STATUS,SPI_Read(READ_REG+STATUS)); // clear interrupt flag(TX_DS)
331 3 delay_ms(200);
332 3 P0=0xff; // Turn off the led
333 3 RX_Mode(); // set receive mode
334 3
335 3 while((P0&KEY)!=KEY);
336 3 }
337 2 }
338 1 }
339 /**************************************************/
340
341 /**************************************************
342 Function: main();
343
344 Description:
345 control all subprogrammes;
346 /**************************************************/
347 void main(void)
348 {
349 1 uchar xx;
350 1 init_io(); // Initialize IO port
351 1 Inituart(); // initialize 232 uart
352 1 //init_int0(); // enable int0 interrupt
353 1 RX_Mode(); // set RX mode
354 1 while(1)
355 1 {
356 2 CheckButtons(); // scan key value and transmit
357 2
358 2 sta=SPI_Read(STATUS); // read register STATUS's value
359 2 if(RX_DR) // if receive data ready (RX_DR) interrupt
C51 COMPILER V8.05a 89LV51 06/18/2008 21:31:17 PAGE 7
360 2 {
361 3 SPI_Read_Buf(RD_RX_PLOAD,rx_buf,TX_PLOAD_WIDTH);// read receive payload from RX_FIFO buffer
362 3 flag=1;
363 3 }
364 2 if(MAX_RT)
365 2 {
366 3 SPI_RW_Reg(FLUSH_TX,0);
367 3 }
368 2 SPI_RW_Reg(WRITE_REG+STATUS,sta);// clear RX_DR or TX_DS or MAX_RT interrupt flag
369 2
370 2
371 2 if(flag) // finish received
372 2 {
373 3 flag=0; // set flag=0
374 3 P0=rx_buf[0]>>1; // turn on led
375 3 delay_ms(200);
376 3 P0=0xff; // turn off led
377 3 xx=rx_buf[0]>>1;
378 3 TxData(xx); // send data to uart
379 3 }
380 2 }
381 1 }
382 /**************************************************/
383
384 /**************************************************
385 Function: ISR_int0() interrupt 0;
386
387 Description:
388 if RX_DR=1 or TX_DS or MAX_RT=1,enter this subprogram;
389 if RX_DR=1,read the payload from RX_FIFO and set flag;
390 /**************************************************/
391 void ISR_int0(void) interrupt 0
392 {
393 1 sta=SPI_Read(STATUS); // read register STATUS's value
394 1 if(RX_DR) // if receive data ready (RX_DR) interrupt
395 1 {
396 2 SPI_Read_Buf(RD_RX_PLOAD,rx_buf,TX_PLOAD_WIDTH);// read receive payload from RX_FIFO buffer
397 2 flag=1;
398 2 }
399 1 if(MAX_RT)
400 1 {
401 2 SPI_RW_Reg(FLUSH_TX,0);
402 2 }
403 1 SPI_RW_Reg(WRITE_REG+STATUS,sta);// clear RX_DR or TX_DS or MAX_RT interrupt flag
404 1 }
405 /**************************************************/
406
MODULE INFORMATION: STATIC OVERLAYABLE
CODE SIZE = 632 ----
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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