Some hardware designers like to include filtering capacitors into reset
lines in order to protect against ESD or other pulses.
This increases the raise time of the reset signal. To still reach the
required 16 µs reset pulse width, we thus have to increase the reset pulse
width via board config.
Previously the function attempted to block here and manually service
the ISR.
This lead to unexpected results, in particular messages queuing up in
the threads message queue.
The result was that the radio would not end up in the correct state.
E.g. sending SLEEP to both interfaces while a transmission was ongoing
would lead to the interfaces waking up again.
With this patch the operation will just return -ERRNO so the caller can
try again.
To reproduce, try the attached patch for the `gnrc_networking` example:
On master you will find that the radio still consumes ~2.4mA after 'shutdown'.
(It is in fact in the state TRXOFF as it woke up again)
With this change the radio should consume less than 1µA (DEEP SLEEP).
diff --git a/examples/gnrc_networking/main.c b/examples/gnrc_networking/main.c
index 6301f4291d..93b96eb939 100644
--- a/examples/gnrc_networking/main.c
+++ b/examples/gnrc_networking/main.c
@@ -23,12 +23,47 @@
#include "shell.h"
#include "msg.h"
+#include "periph/pm.h"
+
+#include "net/netopt.h"
+#include "net/gnrc/netif.h"
+
#define MAIN_QUEUE_SIZE (8)
static msg_t _main_msg_queue[MAIN_QUEUE_SIZE];
extern int udp_cmd(int argc, char **argv);
+extern void send(char *addr_str, char *port_str, char *data, unsigned int num,
+ unsigned int delay);
+
+static int send_and_shutdown(int argc, char **argv)
+{
+ (void) argc;
+ (void) argv;
+
+ /* the address must not exist */
+ char addr[] = "fe80::2068:3123:59f5:d238%7";
+ char port[] = "1234";
+ char data[] = "Hello World!";
+
+ send(addr, port, data, 1, 0);
+
+ /* disable radio */
+ gnrc_netif_t* netif = NULL;
+ netopt_state_t state = NETOPT_STATE_SLEEP;
+ while ((netif = gnrc_netif_iter(netif))) {
+ /* retry while busy */
+ while (gnrc_netapi_set(netif->pid, NETOPT_STATE, 0, &state,
+ sizeof(netopt_state_t)) == -EBUSY);
+ }
+
+ pm_set(0);
+
+ return 0;
+}
+
static const shell_command_t shell_commands[] = {
+ { "shutdown", "turn off the radio & shut down", send_and_shutdown },
{ "udp", "send data over UDP and listen on UDP ports", udp_cmd },
{ NULL, NULL, NULL }
};
diff --git a/examples/gnrc_networking/udp.c b/examples/gnrc_networking/udp.c
index e8a559846e..cb80855b76 100644
--- a/examples/gnrc_networking/udp.c
+++ b/examples/gnrc_networking/udp.c
@@ -36,7 +36,7 @@ static gnrc_netreg_entry_t server = GNRC_NETREG_ENTRY_INIT_PID(GNRC_NETREG_DEMUX
KERNEL_PID_UNDEF);
-static void send(char *addr_str, char *port_str, char *data, unsigned int num,
+void send(char *addr_str, char *port_str, char *data, unsigned int num,
unsigned int delay)
{
gnrc_netif_t *netif = NULL;
When the radio is in DEEP SLEEP, reading the state register will return 0.
This makes the reset routine abort early even though the device is connected
and still waking up.
Instead, just add a timeout to the polling of the WAKEUP IRQ bit.
In practise it has shown that the loop will be taken two times on 'normal'
reset and four times when the radio was in DEEP SLEEP.
Polling 255 times sure does not hurt.
To reproduce the issue, put both interfaces into SLEEP mode,
then reboot the module:
ifconfig 7 set state sleep
ifconfig 8 set state sleep
reboot
Previously the default config was for connecting the REB215-XPRO
module to EXT3 on same54-xpro.
Since now more SPI buses are configured on same54-xpro and the default
config also serves as a compile test for boards with only one SPI bus,
connect the module to the (new) first SPI bus by default.
This adds a driver for the SPI based AT86RF215 transceiver.
The chip supports the IEEE Std 802.15.4-2015 and IEEE Std 802.15.4g-2012 standard.
This driver supports two versions of the chip:
- AT86RF215: dual sub-GHz & 2.4 GHz radio & baseband
- AT86RF215M: sub-GHz radio & baseband only
Both radios support the following PHY modes:
- MR-FSK
- MR-OFDM
- MR-O-QPKS
- O-QPSK (legacy)
The driver currently only implements support for legacy O-QPSK.
To use both interfaces, add
GNRC_NETIF_NUMOF := 2
to your Makefile.
The transceiver is able to send frames of up to 2047 bytes according to
IEEE 802.15.4g-2012 when operating in non-legacy mode.
Known issues:
- [ ] dBm setting values are bogus
- [ ] Channel spacing for sub-GHz MR-O-QPSK might be wrong
- [ ] TX/RX stress test will lock up the driver on openmote-b
