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Improve rf23x cca procesing

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Fix delay_loop timing bug by using long long calculation.
128rfa1 and rf230 both working with contikimac RDC
This commit is contained in:
David Kopf 2011-11-14 11:49:58 -05:00
parent 062b85123e
commit 31ba84eb75
3 changed files with 30 additions and 19 deletions
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2
cpu/avr/radio/rf230bb/halbb.c
View file

@ -952,7 +952,7 @@ HAL_RF230_ISR()
/* Save RSSI for this packet if not in extended mode, scaling to 1dB resolution */
#if !RF230_CONF_AUTOACK
#if 0 // 3-clock shift and add is faster on machines with no hardware multiply
// While the compiler should use similar code for multiply by 3 there may be a bug with -Os in avr-gcc that calls the general subroutine
// With -Os avr-gcc saves a byte by using the general routine for multiply by 3
rf230_last_rssi = hal_subregister_read(SR_RSSI);
rf230_last_rssi = (rf230_last_rssi <<1) + rf230_last_rssi;
#else // Faster with 1-clock multiply. Raven and Jackdaw have 2-clock multiply so same speed while saving 2 bytes of program memory

37
cpu/avr/radio/rf230bb/rf230bb.c
View file

@ -47,7 +47,7 @@
//#define delay_us( us ) ( _delay_us( ( us ) ) )
//_delay_loop_2(uint16_t count) is 4 CPU cycles per iteration, up to 32 milliseconds at 8MHz
#include <util/delay_basic.h>
#define delay_us( us ) ( _delay_loop_2(1+(us*F_CPU)/4000000UL) )
#define delay_us( us ) ( _delay_loop_2(1+((unsigned long long)us*F_CPU)/4000000UL) )
#include <avr/pgmspace.h>
#elif defined(__MSP430__)
@ -104,6 +104,10 @@ static bool is_promiscuous;
* RF230_INSERTACK will generate one based on the hardware result.
* This is triggered when the read routine is called with a buffer
* length of three (the ack length).
* In extended nmode it can be enabled by default to support either
* method. In nonextended mode it would pass an extra ACK to RDCs
* that use the TX_OK result to signal a successful ACK.
* Adds 100 bytes of program flash and two bytes of RAM.
*/
#if RF320_CONF_INSERTACK && RF230_CONF_AUTORETRIES
#define RF230_INSERTACK 1
@ -527,15 +531,17 @@ on(void)
hal_set_slptr_low();
while (rf230_interruptwait) {}
#else
/* SPI based radios. The wake time depends on board capacitance, use 2x the nominal value for safety */
uint8_t sreg = SREG;
cli();
/* SPI based radios. The wake time depends on board capacitance.
* Make sure the delay is long enough, as using SPI too soon will reset the MCU!
* Use 2x the nominal value for safety. 1.5x is not long enough for Raven!
*/
// uint8_t sreg = SREG;cli();
hal_set_slptr_low();
delay_us(TIME_SLEEP_TO_TRX_OFF * 2);
SREG=sreg;
delay_us(2*TIME_SLEEP_TO_TRX_OFF);
// delay_us(TIME_SLEEP_TO_TRX_OFF+TIME_SLEEP_TO_TRX_OFF/2);
// SREG=sreg;
#endif
}
rf230_waitidle();
#if RF230_CONF_AUTOACK
// radio_set_trx_state(is_promiscuous?RX_ON:RX_AACK_ON);
@ -543,6 +549,7 @@ on(void)
#else
radio_set_trx_state(RX_ON);
#endif
rf230_waitidle();
}
static void
off(void)
@ -874,8 +881,8 @@ rf230_transmit(unsigned short payload_len)
#else
hal_set_slptr_low();
DEBUGFLOW('j');
delay_us(TIME_SLEEP_TO_TRX_OFF);
delay_us(TIME_SLEEP_TO_TRX_OFF); //extra delay depends on board capacitance
delay_us(2*TIME_SLEEP_TO_TRX_OFF); //extra delay depends on board capacitance
// delay_us(TIME_SLEEP_TO_TRX_OFF+TIME_SLEEP_TO_TRX_OFF/2);
#endif
} else {
@ -1613,7 +1620,6 @@ rf230_cca(void)
{
uint8_t cca=0;
uint8_t radio_was_off = 0;
uint8_t volatile saved_sreg = SREG;
/* If the radio is locked by an underlying thread (because we are
being invoked through an interrupt), we preted that the coast is
@ -1639,8 +1645,7 @@ rf230_cca(void)
radio_was_off = 1;
rf230_on();
}
/* Don't allow interrupts! */
// cli();
ENERGEST_ON(ENERGEST_TYPE_LED_YELLOW);
/* CCA Mode Mode 1=Energy above threshold 2=Carrier sense only 3=Both 0=Either (RF231 only) */
/* Use the current mode. Note triggering a manual CCA is not recommended in extended mode */
@ -1684,13 +1689,19 @@ rf230_cca(void)
#else /* RF230, RF231 */
/* Don't allow interrupts! */
/* Start the CCA, wait till done, return result */
/* Note reading the TRX_STATUS register clears both CCA_STATUS and CCA_DONE bits */
{ uint8_t volatile saved_sreg = SREG;
cli();
rf230_waitidle();
hal_subregister_write(SR_CCA_REQUEST,1);
delay_us(TIME_CCA);
while ((cca & 0x80) == 0 ) {
cca=hal_register_read(RG_TRX_STATUS);
}
SREG=saved_sreg;
}
#endif
ENERGEST_OFF(ENERGEST_TYPE_LED_YELLOW);
if(radio_was_off) {
@ -1699,12 +1710,10 @@ rf230_cca(void)
// if (cca & 0x40) {/*DEBUGFLOW('3')*/;} else {rf230_pending=1;DEBUGFLOW('4');}
if (cca & 0x40) {
// DEBUGFLOW('5');
SREG=saved_sreg;
return 1;
} else {
// DEBUGFLOW('6');
busyexit:
SREG=saved_sreg;
return 0;
}
}

10
cpu/avr/radio/rf230bb/rf230bb.h
View file

@ -66,13 +66,15 @@
#define RF230_REVA ( 1 )
#define RF230_REVB ( 2 )
#define SUPPORTED_MANUFACTURER_ID ( 31 )
/* RF230 does not support RX_START interrupts in extended mode, but it seems harmless to always enable it. */
/* In non-extended mode this allows RX_START to sample the RF rssi at the end of the preamble */
//#define RF230_SUPPORTED_INTERRUPT_MASK ( 0x0C ) //disable RX_START
#if defined(__AVR_ATmega128RFA1__)
#define RF230_SUPPORTED_INTERRUPT_MASK ( 0xFF )
#else
#define RF230_SUPPORTED_INTERRUPT_MASK ( 0x0F )
/* RF230 does not support RX_START interrupts in extended mode, but it seems harmless to always enable it. */
/* In non-extended mode this allows RX_START to sample the RF rssi at the end of the preamble */
//#define RF230_SUPPORTED_INTERRUPT_MASK ( 0x08 ) //enable trx end only
//#define RF230_SUPPORTED_INTERRUPT_MASK ( 0x0F ) //disable bat low, trx underrun
#define RF230_SUPPORTED_INTERRUPT_MASK ( 0x0C ) //disable bat low, trx underrun, pll lock/unlock
#endif
#define RF230_MIN_CHANNEL ( 11 )