Example for controlling a chain of WS2812 LEDs using ESP32 RMT periph…

[vbenso]

Summary

Recently a driver to transmit pulse trains using ESP32 RMT peripheral was merged to nuttX in PR apache/nuttx#6992

To demonstrate the usage of the mentioned driver, an application that drives a chain of WS2812 LEDS was written.

Impact

Testing

This application was tested in an ESP32 devkitc board driving up to 768 WS2812 RGB LEDs.

[acassis]

@vbenso please fix the coding style issues:

Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:2:1: error: Relative file path does not match actual file
Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:51:3: error: Invalid section for this file type
Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:56:1: error: Missing blank line after comment
Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:64:1: error: Blank line contains whitespace
Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:64:1: error: Too many blank lines
Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:67:1: error: Missing blank line after comment
Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:70:14: error: Operator/assignment must be preceded with whitespace
Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:74:18: error: Operator/assignment must be preceded with whitespace
Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:76:1: error: Too many blank lines
Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:77:1: error: Too many blank lines
Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:82:55: error: Operator/assignment must be preceded with whitespace
Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:86:2: error: Missing whitespace after keyword
Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:86:18: error: Operator/assignment must be preceded with whitespace
Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:86:18: error: Operator/assignment must be followed with whitespace
Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:86:20: error: Missing whitespace after semicolon
Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:89:10: error: Operator/assignment must be preceded with whitespace
Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:89:12: error: Operator/assignment must be followed with whitespace
Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:91:6: error: Missing whitespace after keyword
Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:93:21: error: Operator/assignment must be preceded with whitespace
Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:93:22: error: Operator/assignment must be followed with whitespace
Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:93:36: error: Operator/assignment must be preceded with whitespace
Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:93:36: error: Operator/assignment must be followed with whitespace
Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:97:21: error: Operator/assignment must be preceded with whitespace
Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:97:22: error: Operator/assignment must be followed with whitespace
Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:97:36: error: Operator/assignment must be preceded with whitespace
Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:97:36: error: Operator/assignment must be followed with whitespace
Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:98:7: error: Right brace must be followed by a blank line
Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:107:40: error: Operator/assignment must be preceded with whitespace
Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:185:2: error: Missing whitespace after keyword
Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:186:2: error: Bad left brace alignment
Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:187:85: error: Long line found
Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:188:4: error: Bad alignment
Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:189:2: error: Bad right brace alignment
Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:193:1: error: Blank line contains whitespace
Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:194:1: error: Missing blank line after comment
Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:195:2: error: Missing whitespace after keyword
Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:196:2: error: Bad left brace alignment
Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:198:4: error: Bad alignment
Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:200:6: error: Missing whitespace after keyword
Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:200:22: error: Operator/assignment must be preceded with whitespace
Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:200:22: error: Operator/assignment must be followed with whitespace
Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:201:6: error: Bad left brace alignment
Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:202:8: error: Missing whitespace after keyword
Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:202:8: error: Bad alignment
Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:205:30: error: Operator/assignment must be preceded with whitespace
Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:209:1: error: Blank line contains whitespace
Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:210:8: error: Missing whitespace after keyword
Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:210:8: error: Bad alignment
Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:213:30: error: Upper case hex constant found
Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:215:1: error: Blank line contains whitespace
Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:216:1: error: Blank line precedes right brace at line
Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:217:1: error: Blank line contains whitespace
Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:218:1: error: Blank line precedes right brace at line
Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:218:6: error: Bad right brace alignment
Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:218:7: error: Right brace must be followed by a blank line
Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:219:6: error: Missing whitespace after keyword
Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:219:14: error: Operator/assignment must be preceded with whitespace
Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:219:15: error: Operator/assignment must be followed with whitespace
Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:222:88: error: Long line found
Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:223:6: error: Missing whitespace after keyword
Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:224:6: error: Bad left brace alignment
Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:226:8: error: Bad alignment
Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:227:6: error: Bad right brace alignment
Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:229:56: error: Operator/assignment must be preceded with whitespace
Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:230:1: error: Blank line contains whitespace
Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:231:6: error: Missing whitespace after keyword
Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:231:12: error: Operator/assignment must be preceded with whitespace
Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:231:12: error: Operator/assignment must be followed with whitespace
Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:236:1: error: Blank line contains whitespace
Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:237:80: error: Long line found
Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:238:1: error: Blank line contains whitespace/
Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:239:21: error: Dangling whitespace at the end of line
Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:240:5: error: Right brace must be followed by a blank line
Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:242:2: error: Bad right brace alignment
Error: /home/runner/work/nuttx-apps/nuttx-apps/apps/examples/ws2812esp32rmt/ws2812esp32rmt_main.c:245:18: error: Missing whitespace after semicolon

you can run from apps/ calling the checkpatch.sh inside nuttx/tools/

../nuttx/tools/checkpatch.sh -f examples/ws2812esp32rmt/ws2812esp32rmt_main.c

[vbenso]

Ok, I'll be away from my PC up to Tuesday... But I'll fix the coding style. Perhaps until then, if other fixes come up, let me know.

[vbenso]

@acassis
Style fixed.
I'm still in search for a way to check for the styling rules while editing the code using vscode.
Imagine Crtl+Shift+I and boom, code fixed. That would be awesome.