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Spi pattern fix #502

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Merged
merged 2 commits into from
Jul 31, 2017
Merged

Spi pattern fix #502

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mcgillan Jul 11, 2017
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mcgillan Jul 11, 2017
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5 changes: 3 additions & 2 deletions libraries/SPI/src/SPI.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -242,11 +242,12 @@ void SPIClass::writePattern(uint8_t * data, uint8_t size, uint32_t repeat)

uint32_t byte = (size * repeat);
uint8_t r = (64 / size);
const uint8_t max_bytes_FIFO = r * size; // Max number of whole patterns (in bytes) that can fit into the hardware FIFO

while(byte) {
if(byte > 64) {
if(byte > max_bytes_FIFO) {
writePattern_(data, size, r);
byte -= 64;
byte -= max_bytes_FIFO;
} else {
writePattern_(data, size, (byte / size));
byte = 0;
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