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fix(rmt): channel resolution divider rounding issue

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Closes https://github.com/espressif/esp-idf/issues/15092
This commit is contained in:
morris 2024-12-26 11:35:09 +08:00
parent 0fae01c7b0
commit d566bd431b
2 changed files with 4 additions and 4 deletions
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4
components/esp_driver_rmt/src/rmt_rx.c
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@ -278,8 +278,8 @@ esp_err_t rmt_new_rx_channel(const rmt_rx_channel_config_t *config, rmt_channel_
// select the clock source
ESP_GOTO_ON_ERROR(rmt_select_periph_clock(&rx_channel->base, config->clk_src), err, TAG, "set group clock failed");
// set channel clock resolution
uint32_t real_div = group->resolution_hz / config->resolution_hz;
// set channel clock resolution, find the divider to get the closest resolution
uint32_t real_div = (group->resolution_hz + config->resolution_hz / 2) / config->resolution_hz;
rmt_ll_rx_set_channel_clock_div(hal->regs, channel_id, real_div);
// resolution loss due to division, calculate the real resolution
rx_channel->base.resolution_hz = group->resolution_hz / real_div;

4
components/esp_driver_rmt/src/rmt_tx.c
View File

@ -333,8 +333,8 @@ esp_err_t rmt_new_tx_channel(const rmt_tx_channel_config_t *config, rmt_channel_
#endif
// select the clock source
ESP_GOTO_ON_ERROR(rmt_select_periph_clock(&tx_channel->base, config->clk_src), err, TAG, "set group clock failed");
// set channel clock resolution
uint32_t real_div = group->resolution_hz / config->resolution_hz;
// set channel clock resolution, find the divider to get the closest resolution
uint32_t real_div = (group->resolution_hz + config->resolution_hz / 2) / config->resolution_hz;
rmt_ll_tx_set_channel_clock_div(hal->regs, channel_id, real_div);
// resolution lost due to division, calculate the real resolution
tx_channel->base.resolution_hz = group->resolution_hz / real_div;