altos: Document what HAS_BOOT_RADIO does in the m25 driver

HAS_BOOT_RADIO causes the m25 driver to abort any ongoing receive in
case that is holding the SPI bus.

Signed-off-by: Keith Packard <keithp@keithp.com>

diff --git a/src/drivers/ao_m25.c b/src/drivers/ao_m25.c
index 9603c1debbbd0584b4519ff59dbc034dbeec31ad..518765b2cd86903211b68af3e1fb8ac9e6bccdba 100644 (file)
--- a/src/drivers/ao_m25.c
+++ b/src/drivers/ao_m25.c
@@ -100,6 +100,7 @@ static __xdata uint8_t ao_m25_mutex;
 static __xdata uint8_t ao_m25_instruction[4];
 
 #if HAS_BOOT_RADIO
 static __xdata uint8_t ao_m25_instruction[4];
 
 #if HAS_BOOT_RADIO

+/* Kick any radio listeners off so the flash can be written */

 extern uint8_t ao_radio_in_recv;
 
 static void ao_boot_radio(void) {
 extern uint8_t ao_radio_in_recv;
 
 static void ao_boot_radio(void) {