feat(rmt): support rmt on esp32-h4

2025-08-08 04:02:27 +00:00 · 2025-07-21 19:22:31 +08:00
parent d29e7b3bb6
commit d6a9a0f5d5
28 changed files with 1258 additions and 157 deletions
--- a/components/soc/esp32h4/rmt_periph.c
+++ b/components/soc/esp32h4/rmt_periph.c
@@ -0,0 +1,67 @@
+/*
+ * SPDX-FileCopyrightText: 2025 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include "soc/rmt_periph.h"
+#include "soc/rmt_reg.h"
+#include "soc/gpio_sig_map.h"
+
+const rmt_signal_conn_t rmt_periph_signals = {
+    .groups = {
+        [0] = {
+            .irq = ETS_RMT_INTR_SOURCE,
+            .channels = {
+                [0] = {
+                    .tx_sig = RMT_SIG_OUT0_IDX,
+                    .rx_sig = -1
+                },
+                [1] = {
+                    .tx_sig = RMT_SIG_OUT1_IDX,
+                    .rx_sig = -1
+                },
+                [2] = {
+                    .tx_sig = -1,
+                    .rx_sig = RMT_SIG_IN0_IDX
+                },
+                [3] = {
+                    .tx_sig = -1,
+                    .rx_sig = RMT_SIG_IN1_IDX
+                },
+            }
+        }
+    }
+};
+
+/**
+ * RMT Registers to be saved during sleep retention
+ * - Channel configuration registers, e.g.: RMT_CH0CONF0_REG, RMT_CH3CONF0_REG, RMT_CH3CONF1_REG, RMT_CH0_TX_LIM_REG, RMT_CH3_RX_LIM_REG
+ * - TX synchronization registers, e.g.: RMT_TX_SIM_REG
+ * - Interrupt enable registers, e.g.: RMT_INT_ENA_REG
+ * - Carrier duty registers, e.g.: RMT_CH0CARRIER_DUTY_REG, RMT_CH3_RX_CARRIER_RM_REG
+ * - Global configuration registers, e.g.: RMT_SYS_CONF_REG
+*/
+#define RMT_RETENTION_REGS_CNT 17
+#define RMT_RETENTION_REGS_BASE (DR_REG_RMT_BASE + 0x10)
+static const uint32_t rmt_regs_map[4] = {0xffd03f, 0x0, 0x0, 0x0};
+static const regdma_entries_config_t rmt_regdma_entries[] = {
+    // backup stage: save configuration registers
+    // restore stage: restore the configuration registers
+    [0] = {
+        .config = REGDMA_LINK_ADDR_MAP_INIT(REGDMA_RMT_LINK(0x00),
+                                            RMT_RETENTION_REGS_BASE, RMT_RETENTION_REGS_BASE,
+                                            RMT_RETENTION_REGS_CNT, 0, 0,
+                                            rmt_regs_map[0], rmt_regs_map[1],
+                                            rmt_regs_map[2], rmt_regs_map[3]),
+        .owner = ENTRY(0) | ENTRY(2),
+    },
+};
+
+const rmt_reg_retention_info_t rmt_reg_retention_info[SOC_RMT_GROUPS] = {
+    [0] = {
+        .module = SLEEP_RETENTION_MODULE_RMT0,
+        .regdma_entry_array = rmt_regdma_entries,
+        .array_size = ARRAY_SIZE(rmt_regdma_entries)
+    },
+};