altos: Document what HAS_BOOT_RADIO does in the m25 driver

[fw/altos] / src / drivers / ao_m25.c

diff --git a/src/drivers/ao_m25.c b/src/drivers/ao_m25.c
index c807cd686cb053c06921395d81448f82ec18a8cc..518765b2cd86903211b68af3e1fb8ac9e6bccdba 100644 (file)
--- a/src/drivers/ao_m25.c
+++ b/src/drivers/ao_m25.c
@@ -99,7 +99,19 @@ static __xdata uint8_t ao_m25_mutex;
 
 static __xdata uint8_t ao_m25_instruction[4];
 
-#define M25_SELECT(cs)         ao_spi_get_mask(AO_M25_SPI_CS_PORT,cs,AO_M25_SPI_BUS)
+#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) {
+       if (ao_radio_in_recv)
+               ao_radio_recv_abort();
+}
+#else
+#define ao_boot_radio()
+#endif
+
+#define M25_SELECT(cs)         do { ao_boot_radio(); ao_spi_get_mask(AO_M25_SPI_CS_PORT,cs,AO_M25_SPI_BUS, AO_SPI_SPEED_FAST); } while (0)
 #define M25_DESELECT(cs)       ao_spi_put_mask(AO_M25_SPI_CS_PORT,cs,AO_M25_SPI_BUS)
 
 #define M25_BLOCK_SHIFT                        16