8000 arduino API's SPI::transfer(void*, size) (optimized) by d-a-v · Pull Request #4925 · esp8266/Arduino · GitHub
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arduino API's SPI::transfer(void*, size) (optimized) #4925

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Merged
merged 6 commits into from
Jul 27, 2018
Merged

arduino API's SPI::transfer(void*, size) (optimized) #4925

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c85aa15
SPI::transfer(void*, size) (optimized)
d-a-v Jul 12, 2018
f190e04
spi: transfer(): fix checking size
d-a-v Jul 13, 2018
456c898
spi: transferBytes_: 32bits miso transfer
d-a-v Jul 13, 2018
67009fb
spi: transferBytes_: fix declaration
d-a-v Jul 13, 2018
e692175
spi: transferBytes: add comments, reduce diff
d-a-v Jul 13, 2018
1102f86
Merge branch 'master' into spitransfer
devyte Jul 27, 2018
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spi: transferBytes_: fix declaration
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@d-a-v
d-a-v committed Jul 13, 2018
commit 67009fb08ed41c7352c79305a372f69b6bc6714b
4 changes: 2 additions & 2 deletions libraries/SPI/SPI.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -537,9 +537,9 @@ void SPIClass::transferBytes_(const uint8_t * out, uint8_t * in, uint8_t size) {

setDataBits(size * 8);
uint8_t dataSize = ((size + 3) / 4);
volatile uint32_t * fifoPtr = &SPI1W0;

if(out) {
volatile uint32_t * fifoPtr = &SPI1W0;
uint32_t * dataPtr = (uint32_t*) out;
while(dataSize--) {
*fifoPtr = *dataPtr;
Expand All @@ -558,8 +558,8 @@ void SPIClass::transferBytes_(const uint8_t * out, uint8_t * in, uint8_t size) {
while(SPI1CMD & SPIBUSY) {}

if(in) {
volatile uint32_t * fifoPtr = &SPI1W0;
uint32_t * dataPtr = (uint32_t*) in;
fifoPtr = &SPI1W0;
dataSize = ((size + 3) / 4);
while(dataSize--) {
*dataPtr = *fifoPtr;
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