Bryan Edelman
nrfl2041 NOT WORKING
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main.cpp
00001 //Bryan Edelman 00002 //edelmanb@colorado.edu 00003 //2/24/2010 00004 #include "mbed.h" 00005 #include "nRF24L01.h" 00006 //spi comms with nrf24l01+ chip. ms bit first, LSbyte first! 00007 //or with below to get correct code 00008 //-------------------------------------------------------------------------------------- 00009 00010 //---------------------------Settable Configurations--------------------------------------- 00011 #define PAYLOAD_LENGTH 1 // Byte data packet length 00012 #define CHANNEL 0x10 //Channel to transmit on 00013 #define regCONFIG ( (1 << MASK_TX_DS) | (1<<EN_CRC) | (1<<CRCO) | (1<<MASK_MAX_RT) ) //defualt config 00014 #define regRF_SETUP ( (0<<RF_DR_HIGH)|(3<<RF_PWR)) 00015 #define ADDRESS_LENGTH 0x01 00016 00017 //------------------------------------------------------------------------------------------ 00018 volatile int temp_byte1=0,temp_byte2=0,temp_byte3=0,temp_byte4=0,temp_byte5=0,temp_byte=0; //for reading spi results 00019 SPI spi(p5, p6, p7); // mosi, miso, sclk 00020 //RX Module 00021 DigitalOut rx_cs(p29); 00022 DigitalOut rx_ce(p30); 00023 DigitalIn rx_irq(p28); 00024 //TX Module 00025 DigitalOut tx_cs(p23); 00026 DigitalOut tx_ce(p24); 00027 DigitalIn tx_irq(p22); 00028 00029 DigitalOut led1(LED1); //debug led 00030 Serial pc(USBTX, USBRX); // tx, rx 00031 00032 bool PTX0 = 0; 00033 bool PTX1 = 1; 00034 00035 //*****************************Function Definitions********************** 00036 void setup_rx(); 00037 void setup_tx(); 00038 void setup(); 00039 uint8_t getStatusRX(); 00040 uint8_t getStatusTX(); 00041 bool dataReady(); //working 00042 void configRegTX(uint8_t reg, uint8_t value); //working 00043 void configRegRX(uint8_t reg, uint8_t value); //working 00044 uint8_t readRegTX(uint8_t reg); //working 00045 uint8_t readRegRX(uint8_t reg); //working 00046 void sendData(uint8_t data_byte); 00047 void transmitSync(uint8_t * dataout,uint8_t len); //not implemented yet 00048 uint8_t getData(); 00049 //************************************************************************ 00050 00051 //****************************Funciton Implementations******************** 00052 void setup() { 00053 //setup pins, SPI format and speed.... 00054 rx_ce =0; // rx chip enable low 00055 rx_cs =1; // rx cs line high please 00056 tx_ce = 0;// tx chip enable low 00057 tx_cs =1; // tx cs line high please 00058 spi.format(8,0); // 8 bits per write, mode 0 00059 spi.frequency(1000000); //1 megahurtz note: doesnt work lower 00060 led1=0; 00061 wait(.1); //startup time 00062 /* pc.printf(" RX Registers \nConfig = %x \n",readRegRX(CONFIG)); 00063 pc.printf("enaa = %x \n",readRegRX(EN_AA)); 00064 */pc.printf("enrxadr = %x \n",readRegRX(EN_RXADDR)); 00065 /*pc.printf("aw= %x \n",readRegRX(SETUP_AW)); 00066 pc.printf("retr = %x \n",readRegRX(SETUP_RETR)); 00067 pc.printf("rf ch = %x \n",readRegRX(RF_CH)); 00068 pc.printf("rf setup = %x \n",readRegRX(RF_SETUP)); 00069 pc.printf("rx pw 0 = %x \n",readRegRX(RX_PW_P0)); 00070 pc.printf("rx pw 1 = %x \n\n",readRegRX(RX_PW_P1)); 00071 00072 pc.printf(" TX Registers \nConfig = %x \n",readRegTX(CONFIG)); 00073 pc.printf("enaa = %x \n",readRegTX(EN_AA)); 00074 pc.printf("aw= %x \n",readRegTX(SETUP_AW)); 00075 pc.printf("retr = %x \n",readRegTX(SETUP_RETR)); 00076 pc.printf("rf ch = %x \n",readRegTX(RF_CH)); 00077 pc.printf("rf setup = %x \n",readRegTX(RF_SETUP)); 00078 pc.printf("tx addy = %x \n",readRegTX(TX_ADDR));*/ 00079 00080 } 00081 void setup_rx() { 00082 uint8_t regConfig =0, regRfChan=0, regRfSetup=0, status=0; 00083 00084 configRegRX(CONFIG,regCONFIG|(1<<PWR_UP)|(1<<PRIM_RX)); ///setup to receive, irq on recieve, CRC 2 byte, power up 00085 configRegRX(RF_CH, CHANNEL); //set channel # 00086 configRegRX(RF_SETUP,regRF_SETUP); //no continuos carrier, 250Kbps, 0dBm 00087 00088 rx_cs =0; 00089 spi.write(WRITE|RX_ADDR_P0); 00090 spi.write(0x51); 00091 spi.write(0x51); 00092 spi.write(0x51); 00093 spi.write(0x51); 00094 spi.write(0x51); 00095 rx_cs =1; 00096 00097 regConfig =readRegRX(CONFIG); 00098 regRfChan =readRegRX(RF_CH); 00099 regRfSetup =readRegRX(RF_SETUP); 00100 00101 rx_cs =0; 00102 spi.write(READ|RX_ADDR_P0); 00103 temp_byte1=spi.write(NOP); 00104 temp_byte2=spi.write(NOP); 00105 temp_byte3=spi.write(NOP); 00106 temp_byte4=spi.write(NOP); 00107 temp_byte5=spi.write(NOP); 00108 rx_cs =1; 00109 00110 rx_cs =0; 00111 spi.write(FLUSH_RX); 00112 rx_cs =1; 00113 00114 status=getStatusRX(); 00115 configRegRX(STATUS, status|(1 << TX_DS) | (1 << MAX_RT)); 00116 status=getStatusRX(); 00117 00118 pc.printf("RX Config Register = %x \n RX Channel # = %x \n RX RF Setup Reg = %x \n RX Status Reg = %x \n ", regConfig, regRfChan, regRfSetup, status); 00119 pc.printf("RX address = %x%x%x%x%x \n", temp_byte5,temp_byte4,temp_byte3,temp_byte2,temp_byte1); 00120 rx_ce=1; //set to recieve mode 00121 return; 00122 } 00123 00124 void setup_tx() { 00125 uint8_t regConfig =0, regRfChan=0, regRfSetup=0, status=0; 00126 00127 configRegTX(CONFIG,regCONFIG|(1<<PWR_UP)|(0<<PRIM_RX)); 00128 configRegTX(RF_CH,CHANNEL); 00129 configRegTX(RF_SETUP,regRF_SETUP); 00130 00131 regConfig =readRegTX(CONFIG); 00132 regRfChan =readRegTX(RF_CH); 00133 regRfSetup =readRegTX(RF_SETUP); 00134 00135 tx_cs =0; 00136 spi.write(WRITE|TX_ADDR); 00137 spi.write(0x51); 00138 spi.write(0x51); 00139 spi.write(0x51); 00140 spi.write(0x51); 00141 spi.write(0x51); 00142 tx_cs =1; 00143 00144 tx_cs =0; 00145 spi.write(READ|TX_ADDR); 00146 temp_byte1=spi.write(NOP); 00147 temp_byte2=spi.write(NOP); 00148 temp_byte3=spi.write(NOP); 00149 temp_byte4=spi.write(NOP); 00150 temp_byte5=spi.write(NOP); 00151 tx_cs =1; 00152 00153 status=getStatusTX(); 00154 configRegTX(STATUS, status|(1 << TX_DS) | (1 << MAX_RT)); 00155 00156 tx_cs =0; 00157 spi.write(FLUSH_TX); 00158 tx_cs =1; 00159 00160 status=getStatusTX(); 00161 00162 pc.printf("TX Config Register = %x \n TX Channel # = %x \n TX RF Setup Reg = %x \n TX Status Reg = %x \n ", regConfig, regRfChan, regRfSetup, status); 00163 pc.printf("TX address = %x%x%x%x%x \n", temp_byte5,temp_byte4,temp_byte3,temp_byte2,temp_byte1); 00164 00165 tx_ce=0; 00166 return; 00167 } 00168 00169 uint8_t getStatusTX() { 00170 uint8_t status=0; 00171 tx_cs = 0; 00172 spi.write(READ|STATUS); 00173 status =spi.write(NOP); 00174 tx_cs =1; 00175 return status; 00176 } 00177 uint8_t getStatusRX() { 00178 uint8_t status=0; 00179 rx_cs = 0; 00180 spi.write(READ|STATUS); 00181 status =spi.write(NOP); 00182 rx_cs =1; 00183 return status; 00184 } 00185 bool dataReady() { 00186 uint8_t status = getStatusRX(); 00187 return (status & (1 << RX_DR)); 00188 } 00189 void configRegTX(uint8_t reg, uint8_t value) { 00190 tx_cs=0; 00191 spi.write(WRITE|reg); 00192 spi.write(WRITE|value); 00193 tx_cs=1; 00194 } 00195 void configRegRX(uint8_t reg, uint8_t value) { 00196 rx_cs=0; 00197 spi.write(WRITE|reg); 00198 spi.write(WRITE|value); 00199 rx_cs=1; 00200 } 00201 void sendData(uint8_t data) { 00202 uint8_t status; 00203 status = getStatusTX(); 00204 PTX1=1; 00205 while (PTX1) { 00206 status = getStatusTX(); 00207 00208 if ((status & ((1 << TX_DS) | (1 << MAX_RT)))) { 00209 PTX1 = 0; 00210 break; 00211 } 00212 tx_ce=0; 00213 00214 PTX1 = 1; 00215 configRegTX(CONFIG, regCONFIG | ( (1<<PWR_UP) | (0<<PRIM_RX) ) ); // Set to transmitter mode , Power up 00216 00217 tx_cs = 0; // Pull down chip select 00218 spi.write( FLUSH_TX ); // Write cmd to flush tx fifo 00219 tx_cs = 1; // Pull up chip select 00220 00221 //pc.printf("TX status before = %x \n", getStatusTX()); 00222 //pc.printf("data to be sent = %x \n", data); 00223 tx_cs = 0; // Pull down chip select 00224 spi.write(W_TX_PAYLOAD); // Write cmd to write payload 00225 spi.write(data); // Write payload 00226 tx_cs = 1; // Pull up chip select 00227 // pc.printf("TX FIFO status = %x \n", readRegTX(FIFO_STATUS));// 00228 tx_ce=1; // Start transmission 00229 wait(.005); //50uS delay 00230 tx_ce=0; 00231 // wait(1);// 00232 // pc.printf("TX FIFO status = %x \n", readRegTX(FIFO_STATUS));// 00233 // pc.printf("TX status after = %x \n", getStatusTX()); 00234 configRegTX(STATUS,getStatusTX()|(1 << TX_DS) | (1 << MAX_RT)); //clear sent bit 00235 return; 00236 } 00237 } 00238 void transmitSync(uint8_t * dataout,uint8_t len) { //later.... 00239 uint8_t i; //test me! 00240 pc.printf("length = %i \n", len); 00241 for (i = 0;i < len;i++) { 00242 spi.write(dataout[i]); 00243 00244 } 00245 pc.printf("i = %i \n",i); 00246 return; 00247 } 00248 uint8_t getData() 00249 // Reads payload bytes into data array 00250 { 00251 uint8_t data_byte=0; 00252 rx_cs = 0; // Pull down chip select 00253 spi.write(R_RX_PAYLOAD); // Send cmd to read rx payload 00254 data_byte=spi.write(NOP); // Read payload 00255 rx_cs = 1; // Pull up chip select 00256 configRegTX(STATUS,(1<<RX_DR)); // Reset status register 00257 return data_byte; 00258 } 00259 uint8_t readRegTX(uint8_t reg) 00260 { 00261 uint8_t reg_value=0; 00262 tx_cs = 0; 00263 spi.write(READ|reg); 00264 reg_value=spi.write(NOP); 00265 tx_cs = 1; 00266 return reg_value; 00267 } 00268 uint8_t readRegRX(uint8_t reg) 00269 { 00270 uint8_t reg_value=0; 00271 rx_cs = 0; 00272 spi.write(READ|reg); 00273 reg_value = spi.write(NOP); 00274 rx_cs = 1; 00275 return reg_value; 00276 } 00277 //************************************************************************ 00278 int main() { 00279 uint8_t data_to_send =0x55; 00280 setup(); 00281 setup_rx(); 00282 setup_tx(); 00283 wait(.1); 00284 pc.printf("Setup Complete \n"); 00285 00286 configRegRX(RX_PW_P0,PAYLOAD_LENGTH); 00287 configRegRX(RX_PW_P1,PAYLOAD_LENGTH); 00288 //address widths 00289 configRegTX(SETUP_AW,0x03); 00290 configRegRX(SETUP_AW,0x03); 00291 00292 configRegTX(SETUP_RETR,0<<ARC); 00293 configRegRX(ENAA_P0,0x00); //Disable all AA 00294 configRegRX(EN_RXADDR, 0x3F); //ENable only pipe 0 00295 00296 00297 //send some data 00298 //pc.printf("data sent \n\n"); 00299 configRegTX(RF_CH,0x00); 00300 uint8_t i =0; 00301 while (!dataReady()) { 00302 pc.printf("FIFO status = %x \n i = %i \n", readRegRX(FIFO_STATUS), i); 00303 wait(.01); 00304 sendData(data_to_send); 00305 ++i; 00306 configRegTX(RF_CH,i); 00307 } 00308 led1=1; 00309 pc.printf("This is data recieved: %x \n", getData()); 00310 }
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