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Fixed csn pin.

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Marvin Blum
2017-04-17 21:20:48 +02:00
parent 55a584bffb
commit af06ef166f
4 changed files with 68 additions and 54 deletions
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45
rf24/rf24.c
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@@ -68,29 +68,36 @@ void rf24_config(unsigned char channel, unsigned char payload_len){
}
void rf24_rx_addr(unsigned char* addr){
digital_write(_csn, LOW);
rf24_serial_write(W_REGISTER|RX_ADDR_P1); // data pipe
rf24_serial_transmit(addr, 5);
digital_write(_csn, HIGH);
}
void rf24_tx_addr(unsigned char* addr){
digital_write(_csn, LOW);
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);
digital_write(_csn, HIGH);
}
void rf24_rx(){
digital_write(_csn, LOW);
rf24_serial_write(FLUSH_RX);
digital_write(_csn, HIGH);
digital_write(_ce, LOW);
rf24_config_register(STATUS, (1<<RX_DR)|(1<<TX_DS)|(1<<MAX_RT));
rf24_config_register(CONFIG, CONFIG_CRC|(1<<PWR_UP)|(1<<PRIM_RX));
digital_write(_ce, HIGH);
}
void rf24_tx(){
rf24_serial_write(FLUSH_TX);
digital_write(_ce, LOW);
rf24_config_register(STATUS, (1<<RX_DR)|(1<<TX_DS)|(1<<MAX_RT));
rf24_config_register(CONFIG, CONFIG_CRC|(1<<PWR_UP)|(0<<PRIM_RX));
digital_write(_ce, LOW);
}
void rf24_power_down(){
@@ -100,8 +107,11 @@ void rf24_power_down(){
void rf24_send(unsigned char* data){
rf24_tx();
digital_write(_csn, LOW);
rf24_serial_write(FLUSH_TX);
rf24_serial_write(W_TX_PAYLOAD);
rf24_serial_transmit(data, _payload_len);
digital_write(_csn, HIGH);
digital_write(_ce, HIGH);
}
@@ -121,6 +131,7 @@ unsigned char rf24_data_ready(){
}
void rf24_get_data(unsigned char* data){
digital_write(_csn, LOW);
rf24_serial_write(R_RX_PAYLOAD);
unsigned char i = 0;
@@ -128,22 +139,31 @@ void rf24_get_data(unsigned char* data){
data[i] = rf24_serial_write(NOP);
}
rf24_config_register(STATUS, 1<<RX_DR);
rf24_serial_write(FLUSH_RX);
digital_write(_csn, HIGH);
rf24_config_register(STATUS, 1<<RX_DR);
}
unsigned char rf24_status(){
return rf24_serial_write(NOP); // returns STATUS register
digital_write(_csn, LOW);
unsigned char status = rf24_serial_write(NOP); // returns STATUS register
digital_write(_csn, HIGH);
return status;
}
void rf24_config_register(unsigned char reg, unsigned char value){
digital_write(_csn, LOW);
rf24_serial_write(W_REGISTER|(reg&REG_MASK));
rf24_serial_write(value);
digital_write(_csn, HIGH);
}
unsigned char rf24_read_register(unsigned char reg){
digital_write(_csn, LOW);
rf24_serial_write(R_REGISTER|(reg&REG_MASK));
return rf24_serial_write(NOP);
unsigned char data = rf24_serial_write(NOP);
digital_write(_csn, HIGH);
return data;
}
unsigned char rf24_fifo_empty(){
@@ -160,11 +180,13 @@ void rf24_serial_transmit(unsigned char* data, unsigned char len){
}
unsigned char rf24_serial_write(unsigned char data){
digital_write(_csn, LOW); // chip enable
digital_write(_sck, LOW); // clock
unsigned char i = 0, rx = 0;
_delay_ms(40); // FIXME remove
for(i = 0; i < 8; i++){
digital_write(_sck, LOW); // clock
_delay_ms(5); // FIXME remove
// write bit
if(data&(1<<(7-i))){
@@ -175,16 +197,17 @@ unsigned char rf24_serial_write(unsigned char data){
}
// read bit
digital_write(_sck, HIGH); // clock
rx <<= 1;
digital_write(_sck, HIGH);
rx = rx<<1;
if(digital_read(_mi)){
rx |= 0x01;
}
digital_write(_sck, LOW);
}
digital_write(_sck, LOW);
digital_write(_csn, HIGH); // chip disable
_delay_ms(5); // FIXME remove
digital_write(_mo, LOW);
return rx;