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-rw-r--r--src/stm/ao_arch_funcs.h2
-rw-r--r--src/stm/ao_spi_stm.c2
2 files changed, 2 insertions, 2 deletions
diff --git a/src/stm/ao_arch_funcs.h b/src/stm/ao_arch_funcs.h
index 9cfe29e6..18ca20da 100644
--- a/src/stm/ao_arch_funcs.h
+++ b/src/stm/ao_arch_funcs.h
@@ -137,7 +137,7 @@ void
ao_spi_recv(void *block, uint16_t len, uint8_t spi_index);
void
-ao_spi_duplex(void *out, void *in, uint16_t len, uint8_t spi_index);
+ao_spi_duplex(const void *out, void *in, uint16_t len, uint8_t spi_index);
extern uint16_t ao_spi_speed[STM_NUM_SPI];
diff --git a/src/stm/ao_spi_stm.c b/src/stm/ao_spi_stm.c
index 6b1d33d0..91e19adf 100644
--- a/src/stm/ao_spi_stm.c
+++ b/src/stm/ao_spi_stm.c
@@ -306,7 +306,7 @@ ao_spi_recv(void *block, uint16_t len, uint8_t spi_index)
}
void
-ao_spi_duplex(void *out, void *in, uint16_t len, uint8_t spi_index)
+ao_spi_duplex(const void *out, void *in, uint16_t len, uint8_t spi_index)
{
uint8_t id = AO_SPI_INDEX(spi_index);
struct stm_spi *stm_spi = ao_spi_stm_info[id].stm_spi;