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gdma: avoid manually start/stop when channel is controled by ETM

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This commit is contained in:
morris
2023-04-03 15:55:00 +08:00
parent 1429913042
commit 6c19e7b8a7
5 changed files with 18 additions and 10 deletions
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components/esp_hw_support/include/esp_private/gdma.h
+3
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@@ -265,6 +265,7 @@ esp_err_t gdma_register_rx_event_callbacks(gdma_channel_handle_t dma_chan, gdma_
* @return
* - ESP_OK: Start DMA engine successfully
* - ESP_ERR_INVALID_ARG: Start DMA engine failed because of invalid argument
* - ESP_ERR_INVALID_STATE: Start DMA engine failed because of invalid state, e.g. the channel is controlled by ETM, so can't start it manually
* - ESP_FAIL: Start DMA engine failed because of other error
*/
esp_err_t gdma_start(gdma_channel_handle_t dma_chan, intptr_t desc_base_addr);
@@ -279,6 +280,7 @@ esp_err_t gdma_start(gdma_channel_handle_t dma_chan, intptr_t desc_base_addr);
* @return
* - ESP_OK: Stop DMA engine successfully
* - ESP_ERR_INVALID_ARG: Stop DMA engine failed because of invalid argument
* - ESP_ERR_INVALID_STATE: Stop DMA engine failed because of invalid state, e.g. the channel is controlled by ETM, so can't stop it manually
* - ESP_FAIL: Stop DMA engine failed because of other error
*/
esp_err_t gdma_stop(gdma_channel_handle_t dma_chan);
@@ -347,6 +349,7 @@ typedef struct {
* @brief Get the ETM task for GDMA channel
*
* @note The created ETM task object can be deleted later by calling `esp_etm_del_task`
* @note If the GDMA task (e.g. start/stop) is controlled by ETM, then you can't use `gdma_start`/`gdma_stop` to control it.
*
* @param[in] dma_chan GDMA channel handle, allocated by `gdma_new_channel`
* @param[in] config GDMA ETM task configuration