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driver(uart): Add API to get the position of cmd_char

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This commit is contained in:
kooho 2018-04-03 12:34:16 +08:00
parent 393f3da37c
commit 305c788c60
2 changed files with 35 additions and 0 deletions
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22
components/driver/include/driver/uart.h
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@ -674,8 +674,11 @@ esp_err_t uart_disable_pattern_det_intr(uart_port_t uart_num);
* @param pattern_chr character of the pattern
* @param chr_num number of the character, 8bit value.
* @param chr_tout timeout of the interval between each pattern characters, 24bit value, unit is APB (80Mhz) clock cycle.
* When the duration is less than this value, it will not take this data as at_cmd char
* @param post_idle idle time after the last pattern character, 24bit value, unit is APB (80Mhz) clock cycle.
* When the duration is less than this value, it will not take the previous data as the last at_cmd char
* @param pre_idle idle time before the first pattern character, 24bit value, unit is APB (80Mhz) clock cycle.
* When the duration is less than this value, it will not take this data as the first at_cmd char
*
* @return
* - ESP_OK Success
@ -702,6 +705,25 @@ esp_err_t uart_enable_pattern_det_intr(uart_port_t uart_num, char pattern_chr, u
*/
int uart_pattern_pop_pos(uart_port_t uart_num);
/**
* @brief Return the nearest detected pattern position in buffer.
* The positions of the detected pattern are saved in a queue,
* This function do nothing to the queue.
* @note If the RX buffer is full and flow control is not enabled,
* the detected pattern may not be found in the rx buffer due to overflow.
*
* The following APIs will modify the pattern position info:
* uart_flush_input, uart_read_bytes, uart_driver_delete, uart_pop_pattern_pos
* It is the application's responsibility to ensure atomic access to the pattern queue and the rx data buffer
* when using pattern detect feature.
*
* @param uart_num UART port number
* @return
* - (-1) No pattern found for current index or parameter error
* - others the pattern position in rx buffer.
*/
int uart_pattern_get_pos(uart_port_t uart_num);
/**
* @brief Allocate a new memory with the given length to save record the detected pattern position in rx buffer.
* @param uart_num UART port number

13
components/driver/uart.c
View file

@ -411,6 +411,19 @@ int uart_pattern_pop_pos(uart_port_t uart_num)
return pos;
}
int uart_pattern_get_pos(uart_port_t uart_num)
{
UART_CHECK((p_uart_obj[uart_num]), "uart driver error", (-1));
UART_ENTER_CRITICAL(&uart_spinlock[uart_num]);
uart_pat_rb_t* pat_pos = &p_uart_obj[uart_num]->rx_pattern_pos;
int pos = -1;
if (pat_pos != NULL && pat_pos->rd != pat_pos->wr) {
pos = pat_pos->data[pat_pos->rd];
}
UART_EXIT_CRITICAL(&uart_spinlock[uart_num]);
return pos;
}
esp_err_t uart_pattern_queue_reset(uart_port_t uart_num, int queue_length)
{
UART_CHECK((uart_num < UART_NUM_MAX), "uart_num error", ESP_FAIL);