altos: Mark STM ao_spi_send as taking const pointer

We don't write to this, so let it be const for type checking

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

diff --git a/src/stm/ao_arch_funcs.h b/src/stm/ao_arch_funcs.h
index 7ad3b4b8d97cffd47bac2cf83484d9942cafb892..42f1a2e5d75c5aeb4680dbf12c7c9b0f039e9ebb 100644 (file)
--- a/src/stm/ao_arch_funcs.h
+++ b/src/stm/ao_arch_funcs.h
@@ -74,7 +74,7 @@ void
 ao_spi_put(uint8_t spi_index);
 
 void
-ao_spi_send(void *block, uint16_t len, uint8_t spi_index);
+ao_spi_send(const void *block, uint16_t len, uint8_t spi_index);
 
 void
 ao_spi_send_fixed(uint8_t value, uint16_t len, uint8_t spi_index);

diff --git a/src/stm/ao_spi_stm.c b/src/stm/ao_spi_stm.c
index 885af54466a8f41567604f336fce8da0bcf03477..7eaa392418438ea56c9c7c4ae774ef6a52b0bed1 100644 (file)
--- a/src/stm/ao_spi_stm.c
+++ b/src/stm/ao_spi_stm.c
@@ -42,7 +42,7 @@ static const struct ao_spi_stm_info ao_spi_stm_info[STM_NUM_SPI] = {
 static uint8_t spi_dev_null;
 
 void
-ao_spi_send(void *block, uint16_t len, uint8_t spi_index)
+ao_spi_send(const void *block, uint16_t len, uint8_t spi_index)
 {
        struct stm_spi *stm_spi = ao_spi_stm_info[AO_SPI_INDEX(spi_index)].stm_spi;
        uint8_t mosi_dma_index = ao_spi_stm_info[AO_SPI_INDEX(spi_index)].mosi_dma_index;
@@ -51,7 +51,7 @@ ao_spi_send(void *block, uint16_t len, uint8_t spi_index)
        /* Set up the transmit DMA to deliver data */
        ao_dma_set_transfer(mosi_dma_index,
                            &stm_spi->dr,
-                           block,
+                           (void *) block,
                            len,
                            (0 << STM_DMA_CCR_MEM2MEM) |
                            (STM_DMA_CCR_PL_MEDIUM << STM_DMA_CCR_PL) |