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feat(rmt): allow to set init level before any tx transmission

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Closes https://github.com/espressif/esp-idf/issues/16068
This commit is contained in:
Chen Jichang
2025-06-12 18:18:30 +08:00
committed by Chen Ji Chang
parent f31ab9c91a
commit e32a8c0978
2 changed files with 2 additions and 1 deletions
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1
components/driver/rmt/include/driver/rmt_tx.h
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@@ -44,6 +44,7 @@ typedef struct {
uint32_t with_dma: 1; /*!< If set, the driver will allocate an RMT channel with DMA capability */ uint32_t with_dma: 1; /*!< If set, the driver will allocate an RMT channel with DMA capability */
uint32_t io_loop_back: 1; /*!< The signal output from the GPIO will be fed to the input path as well */ uint32_t io_loop_back: 1; /*!< The signal output from the GPIO will be fed to the input path as well */
uint32_t io_od_mode: 1; /*!< Configure the GPIO as open-drain mode */ uint32_t io_od_mode: 1; /*!< Configure the GPIO as open-drain mode */
uint32_t init_level: 1; /*!< Set the initial level of the RMT channel signal */
} flags; /*!< TX channel config flags */ } flags; /*!< TX channel config flags */
} rmt_tx_channel_config_t; } rmt_tx_channel_config_t;

2
components/driver/rmt/rmt_tx.c
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@@ -296,7 +296,7 @@ esp_err_t rmt_new_tx_channel(const rmt_tx_channel_config_t *config, rmt_channel_
// disable carrier modulation by default, can reenable by `rmt_apply_carrier()` // disable carrier modulation by default, can reenable by `rmt_apply_carrier()`
rmt_ll_tx_enable_carrier_modulation(hal->regs, channel_id, false); rmt_ll_tx_enable_carrier_modulation(hal->regs, channel_id, false);
// idle level is determined by register value // idle level is determined by register value
rmt_ll_tx_fix_idle_level(hal->regs, channel_id, 0, true); rmt_ll_tx_fix_idle_level(hal->regs, channel_id, config->flags.init_level, true);
// always enable tx wrap, both DMA mode and ping-pong mode rely this feature // always enable tx wrap, both DMA mode and ping-pong mode rely this feature
rmt_ll_tx_enable_wrap(hal->regs, channel_id, true); rmt_ll_tx_enable_wrap(hal->regs, channel_id, true);