bissen21/Marlin_Firmware
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Very minor SPI speedup

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This commit is contained in:
Scott Lahteine
2019-02-20 04:00:49 -06:00
parent 422dd6666e
commit 758c6c9464
3 changed files with 47 additions and 60 deletions
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34
Marlin/src/HAL/HAL_DUE/HAL_spi_Due.cpp
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@ -656,8 +656,8 @@
// Read from SPI into buffer
void spiRead(uint8_t* buf, uint16_t nbyte) {
if (nbyte-- == 0) return;
if (!nbyte) return;
--nbyte;
for (int i = 0; i < nbyte; i++) {
//WHILE_TX(0);
SPI0->SPI_TDR = 0x000000FF | SPI_PCS(SPI_CHAN);
@ -669,7 +669,7 @@
}
// Write single byte to SPI
void spiSend(byte b) {
void spiSend(const byte b) {
// write byte with address and end transmission flag
SPI0->SPI_TDR = (uint32_t)b | SPI_PCS(SPI_CHAN) | SPI_TDR_LASTXFER;
WHILE_TX(0);
@ -678,16 +678,17 @@
//DELAY_US(1U);
}
void spiSend(const uint8_t* buf, size_t n) {
if (n == 0) return;
for (size_t i = 0; i < n - 1; i++) {
void spiSend(const uint8_t* buf, size_t nbyte) {
if (!nbyte) return;
--nbyte;
for (size_t i = 0; i < nbyte; i++) {
SPI0->SPI_TDR = (uint32_t)buf[i] | SPI_PCS(SPI_CHAN);
WHILE_TX(0);
WHILE_RX(0);
SPI0->SPI_RDR;
//DELAY_US(1U);
}
spiSend(buf[n - 1]);
spiSend(buf[nbyte]);
}
void spiSend(uint32_t chan, byte b) {
@ -698,15 +699,16 @@
FLUSH_RX();
}
void spiSend(uint32_t chan, const uint8_t* buf, size_t n) {
if (n == 0) return;
for (int i = 0; i < (int)n - 1; i++) {
void spiSend(uint32_t chan, const uint8_t* buf, size_t nbyte) {
if (!nbyte) return;
--nbyte;
for (size_t i = 0; i < nbyte; i++) {
WHILE_TX(0);
SPI0->SPI_TDR = (uint32_t)buf[i] | SPI_PCS(chan);
WHILE_RX(0);
FLUSH_RX();
}
spiSend(chan, buf[n - 1]);
spiSend(chan, buf[nbyte]);
}
// Write from buffer to SPI
@ -775,17 +777,15 @@
uint8_t spiRec() { return (uint8_t)spiTransfer(0xFF); }
void spiRead(uint8_t* buf, uint16_t nbyte) {
if (nbyte)
for (int i = 0; i < nbyte; i++)
buf[i] = spiTransfer(0xFF);
for (int i = 0; i < nbyte; i++)
buf[i] = spiTransfer(0xFF);
}
void spiSend(uint8_t data) { spiTransfer(data); }
void spiSend(const uint8_t* buf, size_t nbyte) {
if (nbyte)
for (uint16_t i = 0; i < nbyte; i++)
spiTransfer(buf[i]);
for (uint16_t i = 0; i < nbyte; i++)
spiTransfer(buf[i]);
}
void spiSendBlock(uint8_t token, const uint8_t* buf) {