Commit Graph

548 Commits

Author SHA1 Message Date
Marius Vikhammer
6334b5e56f docs: update api-reference chapters for C3
Checked and updated the following chapters:
 * api-reference/network
 * api-reference/protocols
 * api-reference/provisioning
 * api-reference/storage
 * api-reference/peripherals/ds
 * api-reference/peripherals/hmac
 * api-reference/peripherals/secure_element
2021-03-01 14:58:08 +08:00
David Čermák
00432fa2c3 Merge branch 'feature/update_mqtt_test_url' into 'master'
Feature/update mqtt test url

See merge request espressif/esp-idf!12473
2021-02-26 16:09:38 +00:00
Renz Bagaporo
0f03f450ff esp_hw_support: create esp_cpu
Create a esp_cpu header that contains CPU-related functions and
utilities.
2021-02-26 13:34:29 +08:00
Michael (XIAO Xufeng)
eb29d8dbda Merge branch 'feature/support_invert_rmt_signal_in_gpio_matrix' into 'master'
rmt: support inverting signal in gpio matrix

Closes IDF-2762

See merge request espressif/esp-idf!12420
2021-02-25 11:14:19 +00:00
Michael (XIAO Xufeng)
268289eade Merge branch 'docs/spi_flash_auto_suspend' into 'master'
spi_flash: update docs after adding CONFIG_SPI_FLASH_AUTO_SUSPEND

See merge request espressif/esp-idf!12290
2021-02-25 09:16:10 +00:00
morris
efa92cb204 rmt: support invert RMT signal by GPIO matrix 2021-02-25 12:42:23 +08:00
Angus Gratton
a0eb455ec3 Merge branch 'refactor/misc_move_from_esp_common' into 'master'
Movements from esp_common

Closes IDF-1947

See merge request espressif/esp-idf!9692
2021-02-24 23:16:52 +00:00
Angus Gratton
84b33b9dba Merge branch 'feature/update_efuse_doc' into 'master'
doc/efuse: Adds efuse doc for ESP32-C3

Closes IDF-2328

See merge request espressif/esp-idf!12365
2021-02-24 22:30:18 +00:00
Michael (XIAO Xufeng)
476fdcba68 spi_flash: update docs after adding CONFIG_SPI_FLASH_AUTO_SUSPEND 2021-02-24 20:20:18 +08:00
Renz Bagaporo
813044c6db docs, ci: update docs and ci with movements from esp_common 2021-02-24 12:16:37 +08:00
Michael (XIAO Xufeng)
db1c635db4 Merge branch 'feature/esp32c3_rtc_temp_calibration' into 'master'
temperature_sensor: calibration for esp32c3

Closes IDF-2502

See merge request espressif/esp-idf!12158
2021-02-24 03:27:49 +00:00
Michael (XIAO Xufeng)
26be097431 Merge branch 'feature/touch_sense_api_reference' into 'master'
touch_element: add touch element lib api-reference doc

Closes IDF-2666

See merge request espressif/esp-idf!11827
2021-02-24 03:00:10 +00:00
yuanjm
6019c22092 doc: Update mqtt open source test server address 2021-02-23 15:30:06 +08:00
Angus Gratton
fb1488abba Merge branch 'feature/esp_timer_isr_dispatch_method_restore' into 'master'
esp timer: Add ISR dispatch method

Closes IDF-1172 and IDF-1173

See merge request espressif/esp-idf!11572
2021-02-23 06:21:14 +00:00
Cao Sen Miao
85855ad8a6 temp_sensor: add calibration for esp32c3 2021-02-23 10:48:17 +08:00
KonstantinKondrashov
5a5f5ad031 doc/efuse: Adds efuse doc for ESP32-C3 2021-02-22 15:51:45 +08:00
Kang Zuoling
78a1cd3643 touch_element: add touch element api-reference doc 2021-02-22 12:16:49 +08:00
Krzysztof Budzynski
6fc1a7e5e9 Merge branch 'doc/twai_time_quatum' into 'master'
TWAI: Fix doc grammar of time quantum

Closes IDFGH-4748

See merge request espressif/esp-idf!12406
2021-02-19 02:10:44 +00:00
Krzysztof Budzynski
9274abf5c9 Merge branch 'doc/nvs_get_used_entry_count__clarify' into 'master'
[doc]: NVS documentation updates

Closes IDF-1563, DOC-165, and IDF-859

See merge request espressif/esp-idf!12056
2021-02-18 10:36:16 +00:00
Christoph Rackwitz
c2e940e04c
singular form of quanta is quantum
it's like bacteria/bacterium, phenomena/phenomenon
2021-02-16 18:02:30 +01:00
Angus Gratton
8c195a7a17 Merge branch 'feature/ulp_c3_not_exists_update_doc' into 'master'
doc/ulp(esp32c3): Excludes ulp and some RTC features from ESP32C3 doc

Closes IDF-2318 and IDF-2331

See merge request espressif/esp-idf!12347
2021-02-15 23:09:54 +00:00
David Cermak
4051922885 esp_netif: Update documentation on deinitialization of wifi default netif
Closes https://github.com/espressif/esp-idf/issues/6504
2021-02-10 13:28:36 +00:00
KonstantinKondrashov
aa581aba0f doc/ulp(esp32c3): Excludes ulp and some RTC features from ESP32C3 doc 2021-02-10 18:15:04 +08:00
KonstantinKondrashov
63d4911cdb esp_timer: Add ESP_TIMER_ISR dispatch method
Using own spinlock for each list (TASK and ISR disp method)
Reduced the dependency of ISR on the TASK dispatch method
2021-02-08 19:10:11 +08:00
Jakob Hasse
916f02164e [doc]: NVS documentation updates
* Move nvs flash README to common doc directory
* correct markup of functions and types in text
  from old README
* Better comment of nvs_get_used_entry_count()
* Mention C++ example in API reference
* Used target instead of hard code ESP32
* Note that strings can only span one page
* Reflect that item types have been moved
* Some clarification about nvs_commit()
* Improved reference to the ESP Partition API
* fixed little mistake in documenting-code.rst
* Change of nvs_open_from_part() to
  nvs_open_from_partition() reflected in docs
* Corrected documentation of
  NVSHandle::get_string(), NVSHandle::get_blob()
  and NVSHandle::get_item_size().

* Closes DOC-165
* Closes IDF-1563
* Closes IDF-859
* Closes https://github.com/espressif/esp-idf/issues/6123
2021-02-08 09:31:23 +08:00
Jiang Jiang Jian
27100cc50e Merge branch 'docs/wifi_doc_update' into 'master'
update wifi docs

See merge request espressif/esp-idf!12232
2021-02-04 16:37:31 +08:00
dongyou
fe76c53fec update wifi docs 2021-02-02 11:42:00 +08:00
Marius Vikhammer
548fd02d10 docs: initial update of programming guide for C3
Updates "front page" content, get-started, and api-guides with C3 content

Enable building and publishing of C3 docs in CI
2021-02-01 15:40:02 +08:00
Michael (XIAO Xufeng)
9ff04b2e79 Merge branch 'feature/musical_buzzer' into 'master'
RMT example: musical buzzer

See merge request espressif/esp-idf!10346
2021-01-28 01:04:24 +08:00
Krzysztof Budzynski
9a5bd86d54 Merge branch 'docs/update_docs_based_on_the_second_batch_of_customer_feedbacks' into 'master'
docs: update documents based on doc-855, doc-885, doc-889, doc-897

See merge request espressif/esp-idf!12124
2021-01-26 16:21:26 +08:00
Krzysztof Budzynski
5ca85248e3 Merge branch 'docs/update_docs_based_on_several_customer_feedbacks' into 'master'
docs: update documents based on doc-881, doc-856, doc-902, and doc-943

See merge request espressif/esp-idf!12118
2021-01-26 16:18:13 +08:00
Krzysztof Budzynski
6df0b98b8e Merge branch 'doc/api-guides-add-hypertargets' into 'master'
Add hypertargets to all TRM references

Closes DOC-713

See merge request espressif/esp-idf!11952
2021-01-26 16:15:29 +08:00
Krzysztof Budzynski
c9a4604fe2 Merge branch 'feature/update_esp32c3_rmt_doc' into 'master'
Update RMT/Sigma-Delta doc for ESP32-C3

Closes IDF-2341 and IDF-2345

See merge request espressif/esp-idf!12091
2021-01-26 14:29:33 +08:00
kirill.chalov
f634c59289 Add hypertargets to all TRM references 2021-01-26 05:51:52 +00:00
Wang Fang
4c31cf9804 docs: Update FreeRTOS version, add tips to set up instructions for Windows 2021-01-26 03:46:25 +00:00
Wang Fang
7df1cad1d6 docs: This MR does the following updates:
1. Provided more information regarding I2S_COMM_FORMAT_STAND_PCM_SHORT and I2S_COMM_FORMAT_STAND_PCM_LONG
2. Added --output flag for partition table read instructions
3. Reordered the header files for esp-ble-mesh
4. Reordered the setup instructions for Ubuntu and CentOS
2021-01-25 11:10:08 +00:00
Marius Vikhammer
3fd37d0b59 adc: change the way data is formattted in adc_dma_demo
The way the adc_dma_demo data was formatted caused it go get parsed as markdown syntax.

Changed it be more "human" readable as well as put all ADC examples in a common folder
2021-01-25 04:51:40 +00:00
morris
5fe6c9f8ab doc: update sigma-delta doc for esp32c3 2021-01-25 11:10:19 +08:00
morris
f1c7a3e06d doc: update rmt doc for esp32c3 2021-01-25 11:08:53 +08:00
Marius Vikhammer
7a8a026b1d docs: fix uart number naming error 2021-01-20 15:48:34 +08:00
zwj
7c1c669799 component/bt: add BLE v5.0 feature for bluedroid host 2021-01-15 17:55:12 +08:00
morris
1969313b6f rmt: add musical buzzer example 2021-01-14 21:32:49 +08:00
Michael (XIAO Xufeng)
3729a33c90 Merge branch 'docs/dac_dma_esp32s2' into 'master'
docs: updates the dac part on ESP32S2.

See merge request espressif/esp-idf!11821
2021-01-13 16:03:57 +08:00
Michael (XIAO Xufeng)
da2be51868 docs: updates the dac part on ESP32S2.
Closes https://github.com/espressif/esp-idf/issues/6333
2021-01-13 14:00:03 +08:00
David Čermák
76f6dd6214 lwip: Moved default SNTP API to esp_sntp.h
and make sntp.h in port folders of lwip component obsoleted
2021-01-13 10:28:34 +08:00
Aditya Patwardhan
ca964dfbcc esp-tls: Changed default behaviour for esp-tls client ( for security
purpose)
        By default esp-tls client will now return error if no server verify option
        is provided, earlier it used to skip the verification by
        default.
        Added config option to skip server verification by default (for testing
        purpose)
        Updated required docs
2021-01-05 07:33:32 +00:00
Wang Fang
cf505d0ead docs: update the documents based on customer feedbacks 2020-12-31 05:40:43 +00:00
Ivan Grokhotkov
7f3b16a99d freertos: always enable static allocation
to use it for newlib locks
2020-12-29 16:18:04 +01:00
Marius Vikhammer
da947d736f Docs: Add C3 support to build_docs 2020-12-28 12:25:03 +08:00
Cao Sen Miao
9a3f8edd95 i2c: update documents for introduction for clock allocator 2020-12-17 15:07:40 +08:00
KonstantinKondrashov
aa96c9a4d8 esp_timer: Add an option to skip unhandled events for periodic timers
- Added an option to skip unhandled events for periodic timers. Useful for light sleep.
- Added doc about this case
- Added Test a latency between a call of callback and real event (14-16us). and UT to check skip_unhandled_events.
- Fixed for esp_timer_dump() if name of timer is NULL
- Refactored timer_process_alarm()
- Added the delete function after using in UTs
2020-12-09 17:19:19 +08:00
Angus Gratton
6ce34a227e Merge branch 'feature/fatfs_fast_seek' into 'master'
feature/fatfs: enable the usage of fast-seek algorithm

See merge request espressif/esp-idf!9916
2020-11-17 07:17:31 +08:00
Krzysztof Budzynski
a1aed140a9 Merge branch 'doc/bluetooth_format_fix' into 'master'
docs: fix broken bullet list in BT chapter

See merge request espressif/esp-idf!11044
2020-11-09 12:16:53 +08:00
Felipe Neves
ac6ce5ddbd docs: added some fast-seek documentation to the fatfs.rst 2020-11-06 13:18:16 -03:00
morris
1be923acb4 rmt: rename always_on to aware_dfs 2020-11-05 19:00:55 +08:00
Marius Vikhammer
509d10b835 docs: fix broken bullet list in BT chapter 2020-10-29 16:05:06 +08:00
Renz Bagaporo
79887fdc6c soc: descriptive part occupy whole component 2020-10-28 07:21:29 +08:00
Michael (XIAO Xufeng)
bcb5c3506d Merge branch 'feature/dedicated_gpio' into 'master'
Dedicated GPIO driver on ESP32-S2 and ESP32-S3

Closes IDF-1672

See merge request espressif/esp-idf!8716
2020-10-26 15:33:33 +08:00
Angus Gratton
8a70b1cdc9 ci freertos: Add test configs for some of the optional FreeRTOS 10 configurations
Also unit tests for the legacy hook functions.
2020-10-21 14:04:01 +11:00
morris
91cf7cc58d doc: dedicated gpio api reference 2020-10-20 21:06:10 +08:00
morris
153e819e8a pcnt: add rotary encoder example 2020-10-19 11:56:18 +08:00
Krzysztof Budzynski
114e4c220f Merge branch 'doc/power_management_esp32s2' into 'master'
docs: describe power management logic for ESP32-S2, fix translation

See merge request espressif/esp-idf!10525
2020-10-16 05:38:28 +08:00
Angus Gratton
f45e8bab35 Merge branch 'feature/jtag_reenable' into 'master'
Feature/jtag reenable

Closes IDF-802

See merge request espressif/esp-idf!10524
2020-10-15 14:46:49 +08:00
Ivan Grokhotkov
840efc2f54 docs: describe power management logic for ESP32-S2, fix translation 2020-10-14 09:05:10 +02:00
Felipe Neves
f3783ba258 app_trace/sysview: fixed freertos tracing calling plus sync apptrace component with the master branch version
docs: remove reference to backported features in freertos 10 api-reference.
2020-10-13 23:52:03 +00:00
Felipe Neves
a3c90bf59a freertos: merged freertos 10 kernel files into IDF
freertos/port: update the port files and split into xtensa and riscv ports

freertos: separated cpu files from rest of the kernel sources

freertos/port_xtensa: separated private include files into a folder

freertos/tasks: added task create pinned to core function do not break current IDF API

freertos/tasks: mimiced task create pinned function into tasks.c to do not break the IDF API.

freertos: freertos component now compiling

freertos: freertos component now building

freertos: moved critical sections outside from FR kernel section to portable section

portmacro_xtensa: add void indentifier on functions that take no arguments

freertos: fix critical sections implementation to match with their function prototype

freertos: add cmake changes of freertos into make

freertos: remove portDONT_DISCARD attribute from switch context function, it was breaking the docs building.

freertos: fix conflicitng types of vApplicationSleep function

license: update the license of freertos

freertos: Doxygen comments refactored to render them correctly on docs

freertos: added new functions of freertos into the documentation

freertos: added message buffers and stream buffers to documentation

sysview: update freertos system view to the compatible with version 10

freertos: fixed event group  documentation rendering

freertos:  update static task structure to match the actual tcb size

freertos: removed backported test functions

freertos/smp: brought SMP code to  FreeRTOS 10 port

freertos/portmacro: added missing crosscore interrupt for yielding tasks

freertos: replaced soft-critical sections with hard-critical sections used by SMP

freertos: placed muxes inside of kernel objects

freertos: replaced original FR critical sections with SMP enabled spinlocks critical sections

freertos: moved xtensa port files to a separated folder

freertos: added multiple instance of global variables required to SMP

freertos: added SMP modifications on specific tasks module functions

freertos: added TLS deletion function to task module

freertos/tls: initialize TLS deletion callback to avoid crashing when calling task delete

freertos: modified vTaskDelete to do not erase current task that runs on other core

freertos: reverted taskhandle and timerhandle as void* type

freertos: fixed de-referencing void pointer to get run time counter

freertos: fix system view trace enter macro arguments

freertos: Replaced soft critical sections with spinlocks on event_groups

freertos: fixed tick function to avoid calling tick hooks twice

freertos: Nofity give checking per CPU if schedule is suspended

freertos: added mpu release on TCB deletion

freertos: Added SMP changes when deleting a TCB on idle task

freertos/license: update freertos license in COPYRIGHT.rst

freertos: unicore configurations can use task create pinned to core, it will be always pinned to core 0

freertos/portmacro: added cpu_hal_get_core_id() function instead of inline assembly

freertos/xtensa:  update xtensa specific files used in master branch

newlib/locks: revert the preemption checking in lock acquisition and release

ref_clock: fix initial state of ref_clock interrupt handler

freertos: added missing critical sections and yielding checkings

freertos: remove magic numbers in vTaskDelete

freertos: added missing critical section in prvIsQueueEmpty
2020-10-13 23:52:03 +00:00
Sachin Billore
ca194295f7 Doc: Added S2 HMAC downstream JTAG support
Closes IDF-802
2020-10-12 14:17:43 +05:30
Darian Leung
4c57f50fe4 TWAI: ISR runs when cache is disabled
This commit adds the feature where the TWAI ISR will continue to
run even if the cache is disabled. Whilst cache is disabled, any
received messages will go into the RX queue, and any pending TX
messages in the TX queue will be transmitted. This feature should
be enabled using the CONFIG_TWAI_ISR_IN_IRAM option.
2020-10-10 14:19:32 +08:00
Krzysztof Budzynski
e0261f18ce Merge branch 'feature/add_esp_rom_printf_to_api_reference' into 'master'
docs: Add esp_rom_printf to API Reference

Closes DOC-454

See merge request espressif/esp-idf!10251
2020-10-09 04:06:10 +08:00
Felipe Neves
2e826b7a8f intr_alloc: split interrupt allocator into common-code and platform-code
esp_system: removed repeated interrupt allocator code and moved common code to esp_system

xtens: moved xtensa specific code from freertos to the xtensa component

hal/interrupt_controller: added interrupt controller hal and ll files

docs: update the doxyfile with new location of esp_itr_alloc.h file

xtensa: fixed dangerous relocation problem after moving xtensa interrupt files out of freertos

docs: removed Xtensa reference from intr_allocator api-reference

xtensa: pushed the interrupt function that manages non iram interrupts to the xtensa layer

esp_system/test: fixed platform dependent setting for intr_allocator tests

hal: rename the functions used to manage non iram interrupt mask.
2020-09-30 07:44:12 +08:00
Krzysztof Budzynski
b07a60c0b8 Merge branch 'docs/update_rtc_clock_source_description_in_api_references' into 'master'
docs: update the description for RTC Clock Sources for esp32 and esp32s2

Closes DOC-530

See merge request espressif/esp-idf!10577
2020-09-24 15:31:53 +08:00
Wang Fang
a50966cf7a docs: update the description for RTC Clock Sources for esp32 and esp32s2 2020-09-23 17:13:19 +08:00
Aditya Patwardhan
24b88a7d9b esp32s2/esp_ds: Digital Signature software support
* Added documentation on how to use the DS peripheral in application
2020-09-22 18:31:31 +05:30
morris
a3cc43485f async memcpy: support async memcopy on esp32s2/s3
Added async memory copy API:
on esp32-s2, the implementation is based on CP_DMA
on esp32-s3, the implementation is based on GDMA
2020-09-16 21:30:54 +08:00
Krzysztof Budzynski
d9202304cd Merge branch 'docs/update_freertos_additions_EN' into 'master'
docs: add more information on how to return an item to the ring buffer

See merge request espressif/esp-idf!10125
2020-09-11 14:32:40 +08:00
He Hui Zi
874876cbf9 docs: add more information on how to return an item to the ring buffer 2020-09-11 14:32:39 +08:00
Krzysztof
db0c6d7921 docs: Add esp_rom_printf to API Reference 2020-09-10 22:55:43 +08:00
Wu Bo Wen
658b56a690 doc/adc: modifications in the adc documentation and adc headers 2020-09-02 11:30:48 +00:00
Krzysztof Budzynski
94cc8fc4b3 Merge branch 'doc/tinyusb' into 'master'
TinyUSB documentation

See merge request espressif/esp-idf!8862
2020-08-31 20:57:29 +08:00
Krzysztof Budzynski
1e1eeac132 Merge branch 'docs/efuse' into 'master'
Docs: correct a chapter number

Closes IDFGH-3700

See merge request espressif/esp-idf!10135
2020-08-31 15:50:20 +08:00
Michael (XIAO Xufeng)
2b323e7180 Merge branch 'bugfix/fix_dac_driver_ut' into 'master'
Driver(dac): fix DAC-DMA driver and unit test

Closes IDF-1407

See merge request espressif/esp-idf!8814
2020-08-31 00:05:34 +08:00
Michael (XIAO Xufeng)
65fff4dbf3 Merge branch 'docs/remove_docs_of_non_existent_limitation' into 'master'
docs: remove no longer existent limitation of spi slave

Closes IDF-1916

See merge request espressif/esp-idf!10111
2020-08-29 23:12:45 +08:00
yiying
0e6803c7b2 docs: remove chapter numbers and make them common to both targets 2020-08-28 14:04:06 +00:00
r0mpage
5d71968bab Fix typo
Merges https://github.com/espressif/esp-idf/pull/5628
2020-08-28 14:04:06 +00:00
Andrei Gramakov
c863b4c777 docs: tinyusb documentation 2020-08-27 13:49:33 +02:00
Dai Zi Yan
7bc6662184 Add Chinese translation to I2C.rst 2020-08-26 22:08:50 +08:00
Armando
725a8e6de0 docs: remove no longer existent limitation of spi slave 2020-08-26 09:00:34 +00:00
fuzhibo
0914dfbb6a dfiver(dac): add dac dma driver and unit test 2020-08-26 06:23:24 +00:00
Michael (XIAO Xufeng)
8a9dc46b14 Merge branch 'bugfix/spi_master_add_dummy_check' into 'master'
spi_master: add dummy check when both mosi and miso are set

Closes IDF-1872 and IDF-266

See merge request espressif/esp-idf!9406
2020-08-23 12:47:18 +08:00
David Čermák
e2f72f449c Merge branch 'feature/ethernet_flow_control' into 'master'
ethernet: support flow control

Closes IDF-1207, WIFI-2510, WIFI-2290, WIFI-2291, WIFI-2507, WIFI-2508, WIFI-2612, and IDFGH-3465

See merge request espressif/esp-idf!9643
2020-08-21 14:33:30 +08:00
Armando
fc6010c959 spi_master: add dummy check when both mosi and miso are set
Closes https://github.com/espressif/esp-idf/issues/2715
2020-08-18 10:30:30 +08:00
Armando
9d1c5df7ab spi_master: add docs for dummy check when both mosi and miso are set 2020-08-18 10:30:30 +08:00
morris
4e38aab1b0 ethernet: support flow control for esp32 emac 2020-08-10 18:54:25 +08:00
Wang Fang
ee135b8e28 Add a note to specify that two calls to RingbufferReceive are required in wrap mode 2020-08-10 18:25:51 +08:00
morris
b30bd7a2ef esp32s2: add CP_DMA driver 2020-08-04 15:28:32 +08:00
Yi Ying
755aee4178 add a note about ESP-IDF FreeRTOS version 2020-07-27 14:40:47 +08:00
Krzysztof Budzynski
a60dccb8c2 Merge branch 'doc/update_ws_api_ref' into 'master'
doc/websocket: updates the API reference for ESP WebSocket Client

See merge request espressif/esp-idf!6494
2020-07-23 17:51:54 +08:00
Ivan Grokhotkov
ba874ccb04 Merge branch 'feature/freemodbus_add_tcp_master_slave' into 'master'
freemodbus:  add tcp master and slave support

Closes IDFGH-1147 and IDF-452

See merge request espressif/esp-idf!7506
2020-07-22 00:34:06 +08:00
Alex Lisitsyn
d0b9829eef examples: freemodbus add tcp support for common master/slave iface
Add TCP port files to provide Modbus TCP interface for communication
Add freemodbus add tcp support for common master/slave iface and tcp example based on socket API
The communication between master and slave checked for each example serial_master, serial_slave (use ModbusPoll TCP)
update tcp example according netif changes, fix ci issues
update TCP slave implementation
update example_test.py to to set IP through stdin
update API documentation
event bit instead of semahore to lock communication resource
update default options and master/slave port files

Closes https://github.com/espressif/esp-idf/issues/858
Closes IDF-452
2020-07-22 00:34:04 +08:00
Ivan Grokhotkov
c7e54fd277 Merge branch 'bugfix/doc_rs485_fix_incorrect_sch_label' into 'master'
doc: uart rs485 fix incorrect sch circuit label

Closes DOC-302

See merge request espressif/esp-idf!9649
2020-07-21 22:07:47 +08:00