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Commit Graph

15 Commits

Author SHA1 Message Date
Markus Sattler
2eea25873d fix SPI speed calculation @160Mhz Clock 2015-05-15 13:42:30 +02:00
Markus Sattler
e0c1b47937 add some notes to the SPI functions (aligned to 32Bit) 
- Fatal exception (9)
 2015-05-13 19:03:21 +02:00
Markus Sattler
27f45a205a SD: 
- optimize SPI usage 148% write speed (24kB/s -> 37kB/s) and 127% read speed (121kB/s -> 155kB/s) at 8MHz
 - add clock frequency as parameter for begin(csPin, frequency)
 - SD @80MHz write: 84kB/s read: 231kB/s

SPI add functions:
 - void write32(uint32_t data);
 - void write32(uint32_t data, bool msb);
 - void transferBytes(uint8_t * out, uint8_t * in, uint32_t size);

Adafruit_ILI9341:
 - code clean
 2015-05-10 17:34:16 +02:00
Markus Sattler
070f2b3a14 many speed optimizations in Adafruit_ILI9341 lib (3x times faster) 
add new SPI function:

  void write(uint8_t data);
  void write16(uint16_t data);
  void write16(uint16_t data, bool msb);
  void writeBytes(uint8_t * data, uint32_t size);
  void writePattern(uint8_t * data, uint8_t size, uint32_t repeat);

Adafruit_ILI9341:
| Benchmark                 | Old (ms) | New (ms) | Speedup     |
| ------------------------- | -------- | -------- | ----------- |
| Screen fill 				| 1248369  | 278707   |  +347,91%   |
| Text 						| 86102    | 53785    |  +60,09%    |
| Lines 					| 825400   | 536374   |  +53,89%    |
| Horiz/Vert Lines 			| 101875   | 24653    |  +313,24%   |
| Rectangles (outline) 		| 65720    | 17295    |  +279,99%   |
| Rectangles (filled) 		| 2592250  | 579157   |  +347,59%   |
| Circles (filled) 			| 411475   | 179454   |  +129,29%   |
| Circles (outline) 		| 360002   | 233584   |  +54,12%    |
| Triangles (outline)		| 261772   | 170118   |  +53,88%    |
| Triangles (filled) 		| 866951   | 246237   |  +252,08%   |
| Rounded rects (outline) 	| 154131   | 81570    |  +88,96%    |
| Rounded rects (filled) 	| 2828112  | 660983   |  +327,86%   |
|                           |          |          |             |
| Total                     | 9802159  | 3061917  |  +220,13%   |
 2015-05-09 16:19:32 +02:00
Markus Sattler
dcc899a1b5 some speed optimizations 2015-05-08 15:33:48 +02:00
Markus Sattler
7c33efc3d8 fix SPI run on system clock 2015-05-08 15:30:27 +02:00
Markus Sattler
d7a88c3ea3 use a function to calculate best match clock register for SPI 
TEST:

Frequency: 1000000  -> [0x009C1001] EQU: 0	 Pre: 39     N: 1	 H: 0	 L: 1	 - Back Calculated Frequency: 1000000
Frequency: 4000000  -> [0x00001001] EQU: 0	 Pre: 0	     N: 1	 H: 0	 L: 1	 - Back Calculated Frequency: 40000000
Frequency: 2000000  -> [0x00041001] EQU: 0	 Pre: 1	     N: 1	 H: 0	 L: 1	 - Back Calculated Frequency: 20000000
Frequency: 1600000  -> [0x00004002] EQU: 0	 Pre: 0	     N: 4	 H: 0	 L: 2	 - Back Calculated Frequency: 16000000
Frequency: 1610000  -> [0x00004002] EQU: 0	 Pre: 0	     N: 4	 H: 0	 L: 2	 - Back Calculated Frequency: 16000000
Frequency: 1000000  -> [0x000C1001] EQU: 0	 Pre: 3	     N: 1	 H: 0	 L: 1	 - Back Calculated Frequency: 10000000
Frequency: 8000000  -> [0x00101001] EQU: 0	 Pre: 4	     N: 1	 H: 0	 L: 1	 - Back Calculated Frequency: 8000000
Frequency: 5000000  -> [0x001C1001] EQU: 0	 Pre: 7	     N: 1	 H: 0	 L: 1	 - Back Calculated Frequency: 5000000
Frequency: 4000000  -> [0x00241001] EQU: 0	 Pre: 9	     N: 1	 H: 0	 L: 1	 - Back Calculated Frequency: 4000000
Frequency: 2000000  -> [0x004C1001] EQU: 0	 Pre: 19	 N: 1	 H: 0	 L: 1	 - Back Calculated Frequency: 2000000
Frequency: 1000000  -> [0x009C1001] EQU: 0	 Pre: 39	 N: 1	 H: 0	 L: 1	 - Back Calculated Frequency: 1000000
Frequency: 500000   -> [0x013C1001] EQU: 0	 Pre: 79	 N: 1	 H: 0	 L: 1	 - Back Calculated Frequency: 500000
Frequency: 250000   -> [0x027C1001] EQU: 0	 Pre: 159	 N: 1	 H: 0	 L: 1	 - Back Calculated Frequency: 250000
Frequency: 125000   -> [0x04FC1001] EQU: 0	 Pre: 319	 N: 1	 H: 0	 L: 1	 - Back Calculated Frequency: 125000
Frequency: 6666666  -> [0x00141001] EQU: 0	 Pre: 5	 	 N: 1	 H: 0	 L: 1	 - Back Calculated Frequency: 6666666
Frequency: 6000000  -> [0x00181001] EQU: 0	 Pre: 6	 	 N: 1	 H: 0	 L: 1	 - Back Calculated Frequency: 5714285
Frequency: 3000000  -> [0x00202001] EQU: 0	 Pre: 8	 	 N: 2	 H: 0	 L: 1	 - Back Calculated Frequency: 2962962
Frequency: 100	    -> [0x7FFFF020] EQU: 0	 Pre: 8191	 N: 63	 H: 0	 L: 32	 - Back Calculated Frequency: 152
Frequency: 125000   -> [0x04FC1001] EQU: 0	 Pre: 319	 N: 1	 H: 0	 L: 1	 - Back Calculated Frequency: 125000
Frequency: 16457    -> [0x25F81001] EQU: 0	 Pre: 2430	 N: 1	 H: 0	 L: 1	 - Back Calculated Frequency: 16454
 2015-05-08 00:48:08 +02:00
Markus Sattler
7f4a10062b update README 
add some docu and todo
 2015-05-07 20:48:59 +02:00
Markus Sattler
ee5def9c8c add CPHA support for SPI 
- tested with logic analyzer
 2015-05-07 19:48:55 +02:00
Markus Sattler
163858dc44 fix use SPI.beginTransaction crash 2015-05-07 19:25:25 +02:00
Markus Sattler
6599a9f52a add SPIClass::transfer16 (needed by some display libs) 2015-05-04 18:11:46 +02:00
ficeto
fbec557ddb Importing my changes 2015-04-30 20:48:50 +03:00
Ivan Grokhotkov
dfbc499627 Fix slashes in SPI library 2015-04-03 08:18:23 +03:00
Andrey Filimonov
4626a9df80 Initial ESP8266 HW SPI implementation 
ILI9341 lib as a client for SPI lib
 2015-04-01 07:10:31 +03:00
Ivan Grokhotkov
ee762f3150 Add WIP SPI library 2015-01-21 04:19:04 +03:00