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fix(rmt): alloc channel memory from internal

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This commit is contained in:
Chen Jichang
2025-08-15 16:28:48 +08:00
parent 9da95463af
commit f172bb9877
2 changed files with 8 additions and 8 deletions
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components/driver/rmt/rmt_rx.c
+5 -5
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@@ -1,5 +1,5 @@
/*
* SPDX-FileCopyrightText: 2022-2023 Espressif Systems (Shanghai) CO LTD
* SPDX-FileCopyrightText: 2022-2025 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
@@ -195,14 +195,14 @@ esp_err_t rmt_new_rx_channel(const rmt_rx_channel_config_t *config, rmt_channel_
ESP_GOTO_ON_FALSE(config->flags.with_dma == 0, ESP_ERR_NOT_SUPPORTED, err, TAG, "DMA not supported");
#endif // SOC_RMT_SUPPORT_DMA
// malloc channel memory
uint32_t mem_caps = RMT_MEM_ALLOC_CAPS;
// allocate channel memory from internal memory because it contains atomic variable
uint32_t mem_caps = MALLOC_CAP_INTERNAL | MALLOC_CAP_8BIT;
rx_channel = heap_caps_calloc(1, sizeof(rmt_rx_channel_t), mem_caps);
ESP_GOTO_ON_FALSE(rx_channel, ESP_ERR_NO_MEM, err, TAG, "no mem for rx channel");
// create DMA descriptor
size_t num_dma_nodes = 0;
if (config->flags.with_dma) {
mem_caps |= MALLOC_CAP_INTERNAL | MALLOC_CAP_DMA;
mem_caps |= MALLOC_CAP_DMA;
num_dma_nodes = config->mem_block_symbols * sizeof(rmt_symbol_word_t) / RMT_DMA_DESC_BUF_MAX_SIZE + 1;
// DMA descriptors must be placed in internal SRAM
rx_channel->dma_nodes = heap_caps_aligned_calloc(RMT_DMA_DESC_ALIGN, num_dma_nodes, sizeof(rmt_dma_descriptor_t), mem_caps);
@@ -579,7 +579,7 @@ static bool IRAM_ATTR rmt_isr_handle_rx_done(rmt_rx_channel_t *rx_chan)
portENTER_CRITICAL_ISR(&channel->spinlock);
rmt_ll_rx_set_mem_owner(hal->regs, channel_id, RMT_LL_MEM_OWNER_SW);
// copy the symbols to user space
// Start from C6, the actual pulse count is the number of input pulses N - 1.
// Resulting in the last threshold interrupts may not be triggered correctly when the number of received symbols is a multiple of the memory block size.
// As shown in the figure below, So we special handle the offset
components/driver/rmt/rmt_tx.c
+3 -3
View File
@@ -233,14 +233,14 @@ esp_err_t rmt_new_tx_channel(const rmt_tx_channel_config_t *config, rmt_channel_
ESP_GOTO_ON_FALSE(config->flags.with_dma == 0, ESP_ERR_NOT_SUPPORTED, err, TAG, "DMA not supported");
#endif
// malloc channel memory
uint32_t mem_caps = RMT_MEM_ALLOC_CAPS;
// allocate channel memory from internal memory because it contains atomic variable
uint32_t mem_caps = MALLOC_CAP_INTERNAL | MALLOC_CAP_8BIT;
tx_channel = heap_caps_calloc(1, sizeof(rmt_tx_channel_t) + sizeof(rmt_tx_trans_desc_t) * config->trans_queue_depth, mem_caps);
ESP_GOTO_ON_FALSE(tx_channel, ESP_ERR_NO_MEM, err, TAG, "no mem for tx channel");
// create DMA descriptors
if (config->flags.with_dma) {
// DMA descriptors must be placed in internal SRAM
mem_caps |= MALLOC_CAP_INTERNAL | MALLOC_CAP_DMA;
mem_caps |= MALLOC_CAP_DMA;
tx_channel->dma_nodes = heap_caps_aligned_calloc(RMT_DMA_DESC_ALIGN, RMT_DMA_NODES_PING_PONG, sizeof(rmt_dma_descriptor_t), mem_caps);
ESP_GOTO_ON_FALSE(tx_channel->dma_nodes, ESP_ERR_NO_MEM, err, TAG, "no mem for tx DMA nodes");
// we will use the non-cached address to manipulate the DMA descriptor, for simplicity