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Commit 7535efaf authored by Sam Calisch's avatar Sam Calisch
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clean up

parent 38cabab5
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radio/nrf24L01/nrf-ftdi-ring.c
+ 28
− 92
View file @ 7535efaf
......@@ -68,13 +68,21 @@ uint8_t read_register(uint8_t reg){
_delay_us(1); //give time after ss high
return temp;
}
void write_register(uint8_t reg, uint8_t val){
PORTC.OUTCLR = SS_BM; //SS low
_delay_us(1);
SPIC.DATA = W_REGISTER | reg; while(!(SPIC.STATUS & SPI_IF_bm)) {};
SPIC.DATA = val ; while(!(SPIC.STATUS & SPI_IF_bm)) {};
PORTC.OUTSET = SS_BM; //SS high
_delay_us(1);
}
USART_data_t USART_data;
uint8_t token = 0; //token to pass
uint8_t tempval = 0;
const int pll_delay_us = 130;
void check_registers(uint8_t id){
//debug only
......@@ -147,21 +155,14 @@ void rx_from_standby(){
//enter standby so we can write to configuration register.
PORTC.OUTCLR = CE_BM;
_delay_us(10); //should be 10?
//enter RX mode: set PRIM_RX = 1
tempval = read_register(CONFIG);
PORTC.OUTCLR = SS_BM; //SS low
SPIC.DATA = W_REGISTER | CONFIG; while(!(SPIC.STATUS & SPI_IF_bm)) {};
SPIC.DATA = tempval | PRIM_RX; while(!(SPIC.STATUS & SPI_IF_bm)) {};
PORTC.OUTSET = SS_BM; //SS high
_delay_us(1); //give time to start up
write_register(CONFIG, tempval | PRIM_RX)
//set CE for at least 10 us
PORTC.OUTSET = CE_BM;
_delay_us(10); //should be 10?
//wait for pll to settle
_delay_us(130);
_delay_us(pll_delay_us);
}
void setup(){
......@@ -192,7 +193,7 @@ void setup(){
PORTC.DIRSET = CE_BM; //set up CE pin on PC0
//set up spic.ctrl
SPIC.CTRL = SPI_PRESCALER_DIV4_gc | /* SPI prescaler. */
(0 ? SPI_CLK2X_bm : 0) | /* SPI Clock double. */
(1 ? SPI_CLK2X_bm : 0) | /* SPI Clock double. */
SPI_ENABLE_bm | /* Enable SPI module. */
SPI_MASTER_bm | /* SPI master. */
SPI_MODE_0_gc; //bits driven at falling edge, sampled at rising edge
......@@ -202,49 +203,20 @@ void setup(){
_delay_ms(5); //warm up
//turn off auto-retransmit
PORTC.OUTCLR = SS_BM; //SS low
SPIC.DATA = W_REGISTER | SETUP_RETR; while(!(SPIC.STATUS & SPI_IF_bm)) {};
SPIC.DATA = 0 ; while(!(SPIC.STATUS & SPI_IF_bm)) {};
PORTC.OUTSET = SS_BM; //SS high
_delay_ms(1);
write_register(SETUP_RETR,0);
//turn off disable auto-acknowledge
PORTC.OUTCLR = SS_BM; //SS low
SPIC.DATA = W_REGISTER | EN_AA; while(!(SPIC.STATUS & SPI_IF_bm)) {};
SPIC.DATA = 0 ; while(!(SPIC.STATUS & SPI_IF_bm)) {};
PORTC.OUTSET = SS_BM; //SS high
_delay_ms(1);
write_register(EN_AA,0);
//set the PWR_UP bit in the CONFIG register to 1 to enter standby mode
PORTC.OUTCLR = SS_BM; //SS low
SPIC.DATA = W_REGISTER | CONFIG; while(!(SPIC.STATUS & SPI_IF_bm)) {};
SPIC.DATA = PWR_UP; while(!(SPIC.STATUS & SPI_IF_bm)) {};
PORTC.OUTSET = SS_BM; //SS high
_delay_ms(1); //give time to start up
write_register(CONFIG,PWR_UP);
_delay_ms(3);
//set up data pipe 0
PORTC.OUTCLR = SS_BM; //SS low
SPIC.DATA = W_REGISTER | EN_RXADDR; while(!(SPIC.STATUS & SPI_IF_bm)) {};
SPIC.DATA = 1; while(!(SPIC.STATUS & SPI_IF_bm)) {};
PORTC.OUTSET = SS_BM; //SS high
_delay_ms(1); //give time to start up
write_register(EN_RXADDR,1);
//set data pipe 0 payload length to 1
PORTC.OUTCLR = SS_BM; //SS low
SPIC.DATA = W_REGISTER | RX_PW_P0; while(!(SPIC.STATUS & SPI_IF_bm)) {};
SPIC.DATA = 1; while(!(SPIC.STATUS & SPI_IF_bm)) {};
PORTC.OUTSET = SS_BM; //SS high
_delay_ms(1); //give time to start up
write_register(RX_PW_P0,1);
//set data rate to 2 Mbps with high power
PORTC.OUTCLR = SS_BM; //SS low
SPIC.DATA = W_REGISTER | RF_SETUP; while(!(SPIC.STATUS & SPI_IF_bm)) {};
SPIC.DATA = (0<<5) | (1<<3) | (1<<2) | (1<<1); while(!(SPIC.STATUS & SPI_IF_bm)) {};
PORTC.OUTSET = SS_BM; //SS high
_delay_ms(1); //give time to start up
//I think there may be a typo in the data sheet here.
write_register(RF_SETUP,(0<<5) | (1<<3) | (1<<2) | (1<<1));
//flush tx
PORTC.OUTCLR = SS_BM; //SS low
SPIC.DATA = FLUSH_TX; while(!(SPIC.STATUS & SPI_IF_bm)) {};
......@@ -252,36 +224,21 @@ void setup(){
_delay_ms(1); //give time to start up
//flush rx
PORTC.OUTCLR = SS_BM; //SS low
SPIC.DATA = FLUSH_TX; while(!(SPIC.STATUS & SPI_IF_bm)) {};
SPIC.DATA = FLUSH_RX; while(!(SPIC.STATUS & SPI_IF_bm)) {};
PORTC.OUTSET = SS_BM; //SS high
_delay_ms(1); //give time to start up
// and mask MAX_RT interrupts on IRQ
tempval = read_register(CONFIG);
PORTC.OUTCLR = SS_BM; //SS low
SPIC.DATA = W_REGISTER | CONFIG; while(!(SPIC.STATUS & SPI_IF_bm)) {};
SPIC.DATA = tempval | MAX_RT; while(!(SPIC.STATUS & SPI_IF_bm)) {};
PORTC.OUTSET = SS_BM; //SS high
_delay_ms(1); //give time to start up
write_register(CONFIG,tempval | MAX_RT)
//clear all interrupts
tempval = read_register(STATUS);
PORTC.OUTCLR = SS_BM; //SS low
SPIC.DATA = W_REGISTER | STATUS; while(!(SPIC.STATUS & SPI_IF_bm)) {};
SPIC.DATA = tempval | MAX_RT | RX_DR | TX_DS; while(!(SPIC.STATUS & SPI_IF_bm)) {};
PORTC.OUTSET = SS_BM; //SS high
_delay_ms(1); //give time to start up
//
write_register(STATUS,tempval | MAX_RT | RX_DR | TX_DS)
_delay_ms(1);
sei();
rx_from_standby();
}
// NOTE: we can't do SPIC.DATA &= or |= thing because SPIC.DATA will hold STATUS!!!
void send_token(){
//transition from RX to standby1 (CE=0)
PORTC.OUTCLR = CE_BM;
......@@ -296,31 +253,16 @@ void send_token(){
_delay_us(1);
tempval = read_register(CONFIG);
PORTC.OUTCLR = SS_BM; //SS low
_delay_us(1);
SPIC.DATA = W_REGISTER | CONFIG; while(!(SPIC.STATUS & SPI_IF_bm)) {};
SPIC.DATA = tempval & (~PRIM_RX); while(!(SPIC.STATUS & SPI_IF_bm)) {}; //make sure PRIM_RX is low
PORTC.OUTSET = SS_BM; //SS high
_delay_us(1);
write_register(CONFIG, tempval & (~PRIM_RX))
//pulse CE for at least 10 us
PORTC.OUTSET = CE_BM; _delay_us(10); PORTC.OUTCLR = CE_BM;
//wait for pll to settle
_delay_us(130);
_delay_us(pll_delay_us);
//wait until transmit complete
while( PORTC.IN & IRQ_BM ){}
//clear IRQ -- need to be in standby.
tempval = read_register(STATUS);
PORTC.OUTCLR = SS_BM; //SS low
_delay_us(1);
SPIC.DATA = W_REGISTER | STATUS; while(!(SPIC.STATUS & SPI_IF_bm)) {};
SPIC.DATA = tempval | TX_DS; while(!(SPIC.STATUS & SPI_IF_bm)) {};
PORTC.OUTSET = SS_BM; //SS high
_delay_us(1);
write_register(STATUS, tempval | TX_DS)
rx_from_standby(); //return to RX mode
}
......@@ -340,12 +282,7 @@ void read_token(){
//clear IRQ
tempval = read_register(STATUS);
PORTC.OUTCLR = SS_BM; //SS low
_delay_us(1);
SPIC.DATA = W_REGISTER | STATUS; while(!(SPIC.STATUS & SPI_IF_bm)) {};
SPIC.DATA = tempval | RX_DR; while(!(SPIC.STATUS & SPI_IF_bm)) {};
PORTC.OUTSET = SS_BM; //SS high
_delay_us(1);
write_register(STATUS, tempval | RX_DR)
//check_registers(66);
}
......@@ -369,6 +306,5 @@ int main(void) {
}
}
ISR(USARTD0_RXC_vect){USART_RXComplete(&USART_data);}
ISR(USARTD0_DRE_vect){USART_DataRegEmpty(&USART_data);}
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