Chip config.

ard/pins.c

@@ -8,8 +8,8 @@ const unsigned char INPUT = 0x00;
 const unsigned char OUTPUT = 0x01;
 
 // analog pins (digital range from 0 to 13)
-const unsigned char A0 = 0x0e;
+const unsigned char A0 = 0x0E;
-const unsigned char A1 = 0x0f;
+const unsigned char A1 = 0x0F;
 const unsigned char A2 = 0x10;
 const unsigned char A3 = 0x11;
 const unsigned char A4 = 0x12;

main.c

@@ -6,6 +6,9 @@
 #include "rf24/rf24.h"
 #include "rf24/nRF24L01.h"
 
+unsigned char rx_addr[5] = {0xE7, 0xE7, 0xE7, 0xE7, 0xE7};
+unsigned char tx_addr[5] = {0xD7, 0xD7, 0xD7, 0xD7, 0xD7};
+
 void prepare();
 void loop();
 
@@ -21,12 +24,17 @@ void prepare(){
 	pins_init();
 	serial_init(9600);
 
-	_delay_ms(50);
+	_delay_ms(200);
 	rf24_init(7, 6, 5, 4, 3, 2);
 	_delay_ms(200);
+	rf24_config(0x02, 0xFF);
+	_delay_ms(200);
+	rf24_rx_addr(rx_addr);
+	_delay_ms(200);
+	rf24_tx_addr(tx_addr);
+	_delay_ms(200);
 }
 
 void loop(){
-	rf24_read_register(STATUS);
+	_delay_ms(20);
-	_delay_ms(5);
 }

rf24/nRF24L01.h

@@ -1,25 +1,125 @@
 #ifndef NRF24L01_H_
 #define NRF24L01_H_
 
-#define CONFIG      0x00
+#define CONFIG          0x00
-#define MASK_RX_DR  6
+#define MASK_RX_DR      6
-#define MASK_TX_DS  5
+#define MASK_TX_DS      5
-#define MASK_MAX_RT 4
+#define MASK_MAX_RT     4
-#define EN_CRC      3
+#define EN_CRC          3
-#define CRCO        2
+#define CRCO            2
-#define PWR_UP      1
+#define PWR_UP          1
-#define PRIM_RX     0
+#define PRIM_RX         0
 
-#define STATUS      0x07
+#define EN_AA           0x01
-#define RX_DR       6
+#define ENAA_P5         5
-#define TX_DS       5
+#define ENAA_P4         4
-#define MAX_RT      4
+#define ENAA_P3         3
-#define RX_P_NO     3 // 3 bits
+#define ENAA_P2         2
-#define TX_FULL     0
+#define ENAA_P1         1
+#define ENAA_P0         0
 
-#define R_REGISTER  0x00
+#define EN_RXADDR       0x02
-#define W_REGISTER  0x20
+#define ERX_P5          5
-#define REG_MASK    0x1f
+#define ERX_P4          4
+#define ERX_P3          3
+#define ERX_P2          2
+#define ERX_P1          1
+#define ERX_P0          0
+
+#define SETUP_AW        0x03
+#define AW              0 // 2 bits
+
+#define SETUP_RETR      0x04
+#define ARD             4 // 4 bits
+#define ARC             0 // 4 bits
+
+#define RF_CH_REG       0x05
+#define RF_CH           0 // 7 bits
+#define RF_CH_MASK      0x7F
+
+#define RF_SETUP        0x06
+#define CONT_WAVE       7
+#define RF_DR_LOW       5
+#define PLL_LOCK        4
+#define RF_DR_HIGH      3
+#define RF_PWR          0 // 2 bits
+
+#define STATUS          0x07
+#define RX_DR           6
+#define TX_DS           5
+#define MAX_RT          4
+#define RX_P_NO         1 // 3 bits
+#define STATUS_TX_FULL  0
+
+#define OBSERVE_TX      0x08
+#define PLOS_CNT        4 // 4 bits
+#define ARC_CNT         0 // 4 bits
+
+#define RPD_REG         0x09
+#define RPD             0
+
+#define RX_ADDR_P0      0x0A // 5 bytes
+#define RX_ADDR_P1      0x0B // 5 bytes
+#define RX_ADDR_P2      0x0C // 1 byte
+#define RX_ADDR_P3      0x0D // 1 byte
+#define RX_ADDR_P4      0x0E // 1 byte
+#define RX_ADDR_P5      0x0F // 1 byte
+
+#define TX_ADDR         0x10 // 5 bytes
+
+#define RX_PW_P0_REG    0x11
+#define RX_PW_P0        0 // 6 bits
+#define RX_PW_P1_REG    0x12
+#define RX_PW_P1        0 // 6 bits
+#define RX_PW_P2_REG    0x13
+#define RX_PW_P2        0 // 6 bits
+#define RX_PW_P3_REG    0x14
+#define RX_PW_P3        0 // 6 bits
+#define RX_PW_P4_REG    0x15
+#define RX_PW_P4        0 // 6 bits
+#define RX_PW_P5_REG    0x16
+#define RX_PW_P5        0 // 6 bits
+#define RX_PW_MASK      0x3F
+
+#define FIFO_STATUS     0x17
+#define TX_REUSE        6
+#define TX_FULL         5
+#define TX_EMPTY        4
+#define RX_FULL         1
+#define RX_EMPTY        0
+
+#define DYNPD           0x1C
+#define DPL_P5          5
+#define DPL_P4          4
+#define DPL_P3          3
+#define DPL_P2          2
+#define DPL_P1          1
+#define DPL_P0          0
+
+#define FEATURE         0x1D
+#define EN_DPL          2
+#define EN_ACK_PAY      1
+#define EN_DYN_ACK      0
+
+#define R_REGISTER      0x00
+#define W_REGISTER      0x20
+#define REG_MASK        0x1F
+#define R_RX_PAYLOAD    0x61
+#define W_TX_PAYLOAD    0xA0
+#define FLUSH_TX        0xE1
+#define FLUSH_RX        0xE2
+#define REUSE_TX_PL     0xE3
+#define R_RX_PL_WID     0x60
+#define W_ACK_PAYLOAD   0xA8
+#define W_ACK_PAYLOAD_MASK 0x07
+#define PIPE_0          0x00
+#define PIPE_1          0x01
+#define PIPE_2          0x02
+#define PIPE_3          0x03
+#define PIPE_4          0x04
+#define PIPE_5          0x05
+#define W_TX_PAYLOAD_NOACK 0xB0
+#define NOP             0xFF
 
 // TODO
 

rf24/rf24.c

@@ -11,12 +11,14 @@ const unsigned char RF24_STANDBY_2 = 3;
 const unsigned char RF24_TX = 4;
 const unsigned char RF24_RX = 5;
 
-unsigned char _ce, _csn, _sck, _mo, _mi, _irq;
+unsigned char _ce, _csn, _sck, _mo, _mi, _irq, _payload_len;
 
+void rf24_serial_transmit(unsigned char*, unsigned char);
 unsigned char rf24_serial_write(unsigned char);
 
 void rf24_init(unsigned char ce, unsigned char csn, unsigned char sck, unsigned char mo, unsigned char mi, unsigned char irq){
 	pin_mode(ce, OUTPUT);
+	digital_write(ce, LOW); // disable
 	pin_mode(csn, OUTPUT);
 	digital_write(csn, HIGH); // disable
 	pin_mode(sck, OUTPUT);
@@ -31,25 +33,74 @@ void rf24_init(unsigned char ce, unsigned char csn, unsigned char sck, unsigned
 	_mi = mi;
 	_irq = irq;
 
-	rf24_mode(RF24_POWER_DOWN);
+	//rf24_mode(RF24_POWER_DOWN);
 }
 
-void rf24_mode(unsigned char mode){
+// channel in 1Mhz steps
+void rf24_config(unsigned char channel, unsigned char payload_len){
+	_payload_len = payload_len;
+
+	rf24_config_register(RF_CH, channel&RF_CH_MASK); // 2.4Ghz + channel*1Mhz
+
+	rf24_config_register(RX_PW_P0, 0x00); // auto ACK
+	rf24_config_register(RX_PW_P1, payload_len&RX_PW_MASK); // data
+	rf24_config_register(RX_PW_P2, 0x00); // unused...
+	rf24_config_register(RX_PW_P3, 0x00);
+	rf24_config_register(RX_PW_P4, 0x00);
+	rf24_config_register(RX_PW_P5, 0x00);
+
+	// low transmission rate, 0dBm
+	rf24_config_register(RF_SETUP, (1<<RF_DR_LOW)|(0x03<<RF_PWR));
+
+	// CRC
+	rf24_config_register(CONFIG, (1<<EN_CRC)|(1<<CRCO));
+
+	// auto ACK for pipe 0 and 1
+	//rf24_config_register(EN_AA, 0x03);
+
+	// rx address
+	//rf24_config_register(EN_RXADDR, (1<<ERX_P0)|(1<<ERX_P1));
+
+	// auto retransmit, 1000us, 15 retransmits
+	rf24_config_register(SETUP_RETR, (0x03<<ARD)|(0x0F<<ARC));
+}
+
+void rf24_rx_addr(unsigned char* addr){
+	rf24_serial_write(W_REGISTER|RX_ADDR_P1); // data pipe
+	rf24_serial_transmit(addr, 5);
+}
+
+void rf24_tx_addr(unsigned char* addr){
+	rf24_serial_write(W_REGISTER|RX_ADDR_P0); // auto ACK pipe address must match...
+	rf24_serial_transmit(addr, 5);
+	rf24_serial_write(W_REGISTER|TX_ADDR); // tx address
+	rf24_serial_transmit(addr, 5);
+}
+
+/*void rf24_mode(unsigned char mode){
 	switch(mode){
 		case 1: // RF24_POWER_DOWN
+			digital_write(_ce, LOW);
 			rf24_config_register(CONFIG, 0x00);
 			break;
 		case 2: // RF24_STANDBY_1
-			//rf24_config_register(CONFIG, 1<<PWR_UP);
+			digital_write(_ce, LOW);
+			rf24_config_register(CONFIG, 1<<PWR_UP);
 			break;
 		case 3: // RF24_STANDBY_2
+			digital_write(_ce, HIGH);
+			rf24_config_register(CONFIG, 1<<PWR_UP);
 			break;
 		case 4: // RF24_TX
+			digital_write(_ce, HIGH);
+			rf24_config_register(CONFIG, 1<<PWR_UP);
 			break;
 		case 5: // RF24_RX
+			digital_write(_ce, HIGH);
+			rf24_config_register(CONFIG, (1<<PWR_UP)|(1<<PRIM_RX));
 			break;
 	}
-}
+}*/
 
 void rf24_config_register(unsigned char reg, unsigned char value){
 	rf24_serial_write(W_REGISTER|(reg&REG_MASK));
@@ -60,12 +111,22 @@ unsigned char rf24_read_register(unsigned char reg){
 	return rf24_serial_write(R_REGISTER|(reg&REG_MASK));
 }
 
+void rf24_serial_transmit(unsigned char* data, unsigned char len){
+	unsigned char i = 0;
+
+	for(i = 0; i < len; i++){
+		rf24_serial_write(data[(len-1-i)]);
+	}
+}
+
 unsigned char rf24_serial_write(unsigned char data){
 	digital_write(_sck, LOW);
 	digital_write(_csn, LOW); // chip enable
 	unsigned char i = 0, rx = 0;
 
 	for(i = 0; i < 8; i++){
+		_delay_ms(5);
+
 		// write bit
 		if(data&(1<<(7-i))){
 			digital_write(_mo, HIGH);
@@ -86,6 +147,7 @@ unsigned char rf24_serial_write(unsigned char data){
 	}
 
 	digital_write(_csn, HIGH); // chip disable
+	digital_write(_mo, LOW);
 
 	return rx;
 }

rf24/rf24.h

@@ -8,7 +8,10 @@ extern const unsigned char RF24_TX;
 extern const unsigned char RF24_RX;
 
 void rf24_init(unsigned char, unsigned char, unsigned char, unsigned char, unsigned char, unsigned char);
-void rf24_mode(unsigned char);
+void rf24_config(unsigned char, unsigned char);
+void rf24_rx_addr(unsigned char*);
+void rf24_tx_addr(unsigned char*);
+//void rf24_mode(unsigned char);
 
 void rf24_config_register(unsigned char, unsigned char);
 unsigned char rf24_read_register(unsigned char);