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shave off some time when sending multiple bytes through SPI

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This commit is contained in:
me-no-dev 2016-11-14 13:08:30 +02:00
parent ff9d1fb05c
commit 47babd2098
1 changed files with 4 additions and 6 deletions
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10
cores/esp32/esp32-hal-spi.c
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@ -642,9 +642,9 @@ void __spiTransferBytes(spi_t * spi, uint8_t * data, uint8_t * out, uint32_t byt
uint8_t * bytesBuf = (uint8_t *) wordsBuf; uint8_t * bytesBuf = (uint8_t *) wordsBuf;
if(data) { if(data) {
for(i=0; i<bytes; i++) { memcpy(bytesBuf, data, bytes);//copy data to buffer
bytesBuf[i] = data[i];//copy data to buffer } else {
} memset(bytesBuf, 0xFF, bytes);
} }
while(spi->dev->cmd.usr); while(spi->dev->cmd.usr);
@ -662,9 +662,7 @@ void __spiTransferBytes(spi_t * spi, uint8_t * data, uint8_t * out, uint32_t byt
for(i=0; i<words; i++) { for(i=0; i<words; i++) {
wordsBuf[i] = spi->dev->data_buf[i];//copy spi fifo to buffer wordsBuf[i] = spi->dev->data_buf[i];//copy spi fifo to buffer
} }
for(i=0; i<bytes; i++) { memcpy(out, bytesBuf, bytes);//copy buffer to output
out[i] = bytesBuf[i];//copy buffer to output
}
} }
} }