40c159fcf5
Remove a number of extui instructions
...
Using a uint8_t for the loop counter resulted
in a number of 8-bit extract (extui) instructions.
Using a uint32_t prevents this.
2017-06-06 23:23:09 -05:00
00815f2db4
Manually manage FIFO volatility
...
Replace volatile with properly placed __sync_synchronize
SPI1W0 is volatile, but when writing multiple words
to the FIFO (which is really just a piece of SRAM),
we don't need to worry about write ordering. We only
need worry about write ordering such that all FIFO
words are written completely before HSPI is told to
use FIFO by setting SPI1CMD |= SPIBUSY;
2017-06-06 23:23:09 -05:00
c07c8dc88e
Small cleanup to SPI write16 and write32 for big-endian
...
Merge a common line.
2017-06-06 23:23:09 -05:00
af0f5ed956
Issue #1062 : Implement support for HSPI overlap mode.
2017-05-08 03:04:11 -05:00
18297458be
allows global object instances be switch off with defines ( #2344 )
2016-08-01 11:21:50 +08:00
8ffe1aa2e2
Speed up writePattern() a bit more
2016-04-18 01:26:03 +03:00
a64a694f6d
Speed up SPI.writePattern()
2016-04-16 20:02:06 +03:00
bda212552c
Fix SPI.transfer16() using wrong endianness
2016-04-04 22:10:36 -07:00
66b68d4ada
add CPOL setting
2016-03-16 17:28:24 +08:00
6ab3c76e03
register and clock changes
2015-06-02 00:11:20 +03:00
2eea25873d
fix SPI speed calculation @160Mhz Clock
2015-05-15 13:42:30 +02:00
e0c1b47937
add some notes to the SPI functions (aligned to 32Bit)
...
- Fatal exception (9)
2015-05-13 19:03:21 +02:00
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
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
dcc899a1b5
some speed optimizations
2015-05-08 15:33:48 +02:00
7c33efc3d8
fix SPI run on system clock
2015-05-08 15:30:27 +02:00
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
7f4a10062b
update README
...
add some docu and todo
2015-05-07 20:48:59 +02:00
ee5def9c8c
add CPHA support for SPI
...
- tested with logic analyzer
2015-05-07 19:48:55 +02:00
163858dc44
fix use SPI.beginTransaction crash
2015-05-07 19:25:25 +02:00
6599a9f52a
add SPIClass::transfer16 (needed by some display libs)
2015-05-04 18:11:46 +02:00
fbec557ddb
Importing my changes
2015-04-30 20:48:50 +03:00
dfbc499627
Fix slashes in SPI library
2015-04-03 08:18:23 +03:00
4626a9df80
Initial ESP8266 HW SPI implementation
...
ILI9341 lib as a client for SPI lib
2015-04-01 07:10:31 +03:00
ee762f3150
Add WIP SPI library
2015-01-21 04:19:04 +03:00
