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spi_slave: add a private API to reset transaction queue

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This commit is contained in:
Armando
2022-07-21 21:23:31 +08:00
committed by wanlei
parent e7879abbcc
commit 3dc36f622c
4 changed files with 71 additions and 14 deletions
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27
components/driver/spi_slave.c
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@@ -283,6 +283,33 @@ esp_err_t spi_slave_free(spi_host_device_t host)
return ESP_OK;
}
/**
* @note
* This API is used to reset SPI Slave transaction queue. After calling this function:
* - The SPI Slave transaction queue will be reset.
*
* Therefore, this API shouldn't be called when the corresponding SPI Master is doing an SPI transaction.
*
* @note
* We don't actually need to enter a critical section here.
* SPI Slave ISR will only get triggered when its corresponding SPI Master's transaction is done.
* As we don't expect this function to be called when its corresponding SPI Master is doing an SPI transaction,
* so concurrent call to these registers won't happen
*
*/
esp_err_t SPI_SLAVE_ATTR spi_slave_queue_reset(spi_host_device_t host)
{
SPI_CHECK(is_valid_host(host), "invalid host", ESP_ERR_INVALID_ARG);
SPI_CHECK(spihost[host], "host not slave", ESP_ERR_INVALID_ARG);
esp_intr_disable(spihost[host]->intr);
spi_ll_set_int_stat(spihost[host]->hal.hw);
spihost[host]->cur_trans = NULL;
xQueueReset(spihost[host]->trans_queue);
return ESP_OK;
}
esp_err_t SPI_SLAVE_ATTR spi_slave_queue_trans(spi_host_device_t host, const spi_slave_transaction_t *trans_desc, TickType_t ticks_to_wait)
{