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Merge branch 'feature/rmt_end_transmission_callback' into 'master'

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rmt: Adds a simple handler that can be called when transmission ends.

See merge request !1726
This commit is contained in:
Angus Gratton 2018-01-10 04:59:26 +08:00
parent 3452845063 2227c44254
commit e9ca1dc9b0
2 changed files with 38 additions and 0 deletions
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25
components/driver/include/driver/rmt.h
View file

@ -119,6 +119,16 @@ typedef struct {
typedef intr_handle_t rmt_isr_handle_t;
typedef void (*rmt_tx_end_fn_t)(rmt_channel_t channel, void *arg);
/**
* @brief Structure encapsulating a RMT TX end callback
*/
typedef struct {
rmt_tx_end_fn_t function; /*!< Function which is called on RMT TX end */
void *arg; /*!< Optional argument passed to function */
} rmt_tx_end_callback_t;
/**
* @brief Set RMT clock divider, channel clock is divided from source clock.
*
@ -702,6 +712,21 @@ esp_err_t rmt_wait_tx_done(rmt_channel_t channel, TickType_t wait_time);
*/
esp_err_t rmt_get_ringbuf_handle(rmt_channel_t channel, RingbufHandle_t* buf_handle);
/**
* @brief Registers a callback that will be called when transmission ends.
*
* Called by rmt_driver_isr_default in interrupt context.
*
* @note Requires rmt_driver_install to install the default ISR handler.
*
* @param function Function to be called from the default interrupt handler or NULL.
* @param arg Argument which will be provided to the callback when it is called.
*
* @return the previous callback settings (members will be set to NULL if there was none)
*/
rmt_tx_end_callback_t rmt_register_tx_end_callback(rmt_tx_end_fn_t function, void *arg);
/*
* ----------------EXAMPLE OF RMT INTERRUPT ------------------
* @code{c}

13
components/driver/rmt.c
View file

@ -75,6 +75,9 @@ typedef struct {
rmt_obj_t* p_rmt_obj[RMT_CHANNEL_MAX] = {0};
// Event called when transmission is ended
static rmt_tx_end_callback_t rmt_tx_end_callback;
static void rmt_set_tx_wrap_en(rmt_channel_t channel, bool en)
{
portENTER_CRITICAL(&rmt_spinlock);
@ -548,6 +551,9 @@ static void IRAM_ATTR rmt_driver_isr_default(void* arg)
p_rmt->tx_len_rem = 0;
p_rmt->tx_offset = 0;
p_rmt->tx_sub_len = 0;
if(rmt_tx_end_callback.function != NULL) {
rmt_tx_end_callback.function(channel, rmt_tx_end_callback.arg);
}
break;
//RX_END
case 1:
@ -771,3 +777,10 @@ esp_err_t rmt_get_ringbuf_handle(rmt_channel_t channel, RingbufHandle_t* buf_han
return ESP_OK;
}
rmt_tx_end_callback_t rmt_register_tx_end_callback(rmt_tx_end_fn_t function, void *arg)
{
rmt_tx_end_callback_t previous = rmt_tx_end_callback;
rmt_tx_end_callback.function = function;
rmt_tx_end_callback.arg = arg;
return previous;
}