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dma_channel_transfer_[from/to]_buffer_now: added const volatile to read_addr and volatile to write_addr (#449)

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geurtv 2021-05-27 19:12:39 +02:00 committed by GitHub
parent e0872a32cc
commit 1996a21e3a
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1 changed files with 3 additions and 2 deletions
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src/rp2_common/hardware_dma/include/hardware/dma.h
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@ -409,7 +409,8 @@ static inline void dma_channel_configure(uint channel, const dma_channel_config
* \param read_addr Sets the initial read address * \param read_addr Sets the initial read address
* \param transfer_count Number of transfers to make. Not bytes, but the number of transfers of channel_config_set_transfer_data_size() to be sent. * \param transfer_count Number of transfers to make. Not bytes, but the number of transfers of channel_config_set_transfer_data_size() to be sent.
*/ */
inline static void __attribute__((always_inline)) dma_channel_transfer_from_buffer_now(uint channel, void *read_addr, inline static void __attribute__((always_inline)) dma_channel_transfer_from_buffer_now(uint channel,
const volatile void *read_addr,
uint32_t transfer_count) { uint32_t transfer_count) {
// check_dma_channel_param(channel); // check_dma_channel_param(channel);
dma_channel_hw_t *hw = dma_channel_hw_addr(channel); dma_channel_hw_t *hw = dma_channel_hw_addr(channel);
@ -424,7 +425,7 @@ inline static void __attribute__((always_inline)) dma_channel_transfer_from_buff
* \param write_addr Sets the initial write address * \param write_addr Sets the initial write address
* \param transfer_count Number of transfers to make. Not bytes, but the number of transfers of channel_config_set_transfer_data_size() to be sent. * \param transfer_count Number of transfers to make. Not bytes, but the number of transfers of channel_config_set_transfer_data_size() to be sent.
*/ */
inline static void dma_channel_transfer_to_buffer_now(uint channel, void *write_addr, uint32_t transfer_count) { inline static void dma_channel_transfer_to_buffer_now(uint channel, volatile void *write_addr, uint32_t transfer_count) {
dma_channel_hw_t *hw = dma_channel_hw_addr(channel); dma_channel_hw_t *hw = dma_channel_hw_addr(channel);
hw->write_addr = (uintptr_t) write_addr; hw->write_addr = (uintptr_t) write_addr;
hw->al1_transfer_count_trig = transfer_count; hw->al1_transfer_count_trig = transfer_count;