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Optimize SPI transfers to take one lock and do not return until completed

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This commit is contained in:
me-no-dev 2017-02-01 02:13:56 +02:00
parent 672631ddf0
commit de017a8a1b
3 changed files with 41 additions and 29 deletions
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53
cores/esp32/esp32-hal-spi.c
View File

@ -454,17 +454,17 @@ void spiWrite(spi_t * spi, uint32_t *data, uint8_t len)
len = 16;
}
SPI_MUTEX_LOCK();
while(spi->dev->cmd.usr);
spi->dev->mosi_dlen.usr_mosi_dbitlen = (len * 32) - 1;
spi->dev->miso_dlen.usr_miso_dbitlen = (len * 32) - 1;
spi->dev->miso_dlen.usr_miso_dbitlen = 0;
for(i=0; i<len; i++) {
spi->dev->data_buf[i] = data[i];
}
spi->dev->cmd.usr = 1;
while(spi->dev->cmd.usr);
SPI_MUTEX_UNLOCK();
}
void spiRead(spi_t * spi, uint32_t *data, uint8_t len)
void spiTransfer(spi_t * spi, uint32_t *data, uint8_t len)
{
if(!spi) {
return;
@ -474,6 +474,12 @@ void spiRead(spi_t * spi, uint32_t *data, uint8_t len)
len = 16;
}
SPI_MUTEX_LOCK();
spi->dev->mosi_dlen.usr_mosi_dbitlen = (len * 32) - 1;
spi->dev->miso_dlen.usr_miso_dbitlen = (len * 32) - 1;
for(i=0; i<len; i++) {
spi->dev->data_buf[i] = data[i];
}
spi->dev->cmd.usr = 1;
while(spi->dev->cmd.usr);
for(i=0; i<len; i++) {
data[i] = spi->dev->data_buf[i];
@ -487,21 +493,24 @@ void spiWriteByte(spi_t * spi, uint8_t data)
return;
}
SPI_MUTEX_LOCK();
while(spi->dev->cmd.usr);
spi->dev->mosi_dlen.usr_mosi_dbitlen = 7;
spi->dev->miso_dlen.usr_miso_dbitlen = 7;
spi->dev->miso_dlen.usr_miso_dbitlen = 0;
spi->dev->data_buf[0] = data;
spi->dev->cmd.usr = 1;
while(spi->dev->cmd.usr);
SPI_MUTEX_UNLOCK();
}
uint8_t spiReadByte(spi_t * spi)
uint8_t spiTransferByte(spi_t * spi, uint8_t data)
{
if(!spi) {
return 0;
}
uint8_t data;
SPI_MUTEX_LOCK();
spi->dev->mosi_dlen.usr_mosi_dbitlen = 7;
spi->dev->miso_dlen.usr_miso_dbitlen = 7;
spi->dev->data_buf[0] = data;
spi->dev->cmd.usr = 1;
while(spi->dev->cmd.usr);
data = spi->dev->data_buf[0] & 0xFF;
SPI_MUTEX_UNLOCK();
@ -551,21 +560,24 @@ void spiWriteWord(spi_t * spi, uint16_t data)
return;
}
SPI_MUTEX_LOCK();
while(spi->dev->cmd.usr);
spi->dev->mosi_dlen.usr_mosi_dbitlen = 15;
spi->dev->miso_dlen.usr_miso_dbitlen = 15;
spi->dev->miso_dlen.usr_miso_dbitlen = 0;
spi->dev->data_buf[0] = __spiTranslate16(data, !spi->dev->ctrl.wr_bit_order);
spi->dev->cmd.usr = 1;
while(spi->dev->cmd.usr);
SPI_MUTEX_UNLOCK();
}
uint16_t spiReadWord(spi_t * spi)
uint16_t spiTransferWord(spi_t * spi, uint16_t data)
{
if(!spi) {
return 0;
}
uint16_t data;
SPI_MUTEX_LOCK();
spi->dev->mosi_dlen.usr_mosi_dbitlen = 15;
spi->dev->miso_dlen.usr_miso_dbitlen = 15;
spi->dev->data_buf[0] = __spiTranslate16(data, !spi->dev->ctrl.wr_bit_order);
spi->dev->cmd.usr = 1;
while(spi->dev->cmd.usr);
data = __spiTranslate16(spi->dev->data_buf[0] & 0xFFFF, !spi->dev->ctrl.rd_bit_order);
SPI_MUTEX_UNLOCK();
@ -578,21 +590,24 @@ void spiWriteLong(spi_t * spi, uint32_t data)
return;
}
SPI_MUTEX_LOCK();
while(spi->dev->cmd.usr);
spi->dev->mosi_dlen.usr_mosi_dbitlen = 31;
spi->dev->miso_dlen.usr_miso_dbitlen = 31;
spi->dev->miso_dlen.usr_miso_dbitlen = 0;
spi->dev->data_buf[0] = __spiTranslate32(data, !spi->dev->ctrl.wr_bit_order);
spi->dev->cmd.usr = 1;
while(spi->dev->cmd.usr);
SPI_MUTEX_UNLOCK();
}
uint32_t spiReadLong(spi_t * spi)
uint32_t spiTransferLong(spi_t * spi, uint32_t data)
{
if(!spi) {
return 0;
}
uint32_t data;
SPI_MUTEX_LOCK();
spi->dev->mosi_dlen.usr_mosi_dbitlen = 31;
spi->dev->miso_dlen.usr_miso_dbitlen = 31;
spi->dev->data_buf[0] = __spiTranslate32(data, !spi->dev->ctrl.wr_bit_order);
spi->dev->cmd.usr = 1;
while(spi->dev->cmd.usr);
data = __spiTranslate32(spi->dev->data_buf[0], !spi->dev->ctrl.rd_bit_order);
SPI_MUTEX_UNLOCK();
@ -612,7 +627,6 @@ void spiTransferBits(spi_t * spi, uint32_t data, uint32_t * out, uint8_t bits)
uint32_t mask = (((uint64_t)1 << bits) - 1) & 0xFFFFFFFF;
SPI_MUTEX_LOCK();
while(spi->dev->cmd.usr);
spi->dev->mosi_dlen.usr_mosi_dbitlen = (bits - 1);
spi->dev->miso_dlen.usr_miso_dbitlen = (bits - 1);
if(bytes == 1) {
@ -626,8 +640,9 @@ void spiTransferBits(spi_t * spi, uint32_t data, uint32_t * out, uint8_t bits)
}
spi->dev->cmd.usr = 1;
while(spi->dev->cmd.usr);
if(out) {
while(spi->dev->cmd.usr);
if(bytes == 1) {
*out = spi->dev->data_buf[0] & mask;
} else if(bytes == 2) {
@ -663,7 +678,6 @@ void __spiTransferBytes(spi_t * spi, uint8_t * data, uint8_t * out, uint32_t byt
memset(bytesBuf, 0xFF, bytes);
}
while(spi->dev->cmd.usr);
spi->dev->mosi_dlen.usr_mosi_dbitlen = ((bytes * 8) - 1);
spi->dev->miso_dlen.usr_miso_dbitlen = ((bytes * 8) - 1);
@ -673,8 +687,9 @@ void __spiTransferBytes(spi_t * spi, uint8_t * data, uint8_t * out, uint32_t byt
spi->dev->cmd.usr = 1;
while(spi->dev->cmd.usr);
if(out) {
while(spi->dev->cmd.usr);
for(i=0; i<words; i++) {
wordsBuf[i] = spi->dev->data_buf[i];//copy spi fifo to buffer
}

8
cores/esp32/esp32-hal-spi.h
View File

@ -98,10 +98,10 @@ void spiWriteByte(spi_t * spi, uint8_t data);
void spiWriteWord(spi_t * spi, uint16_t data);
void spiWriteLong(spi_t * spi, uint32_t data);
void spiRead(spi_t * spi, uint32_t *out, uint8_t len);
uint8_t spiReadByte(spi_t * spi);
uint16_t spiReadWord(spi_t * spi);
uint32_t spiReadLong(spi_t * spi);
void spiTransfer(spi_t * spi, uint32_t *out, uint8_t len);
uint8_t spiTransferByte(spi_t * spi, uint8_t data);
uint16_t spiTransferWord(spi_t * spi, uint16_t data);
uint32_t spiTransferLong(spi_t * spi, uint32_t data);
void spiTransferBits(spi_t * spi, uint32_t data, uint32_t * out, uint8_t bits);
void spiTransferBytes(spi_t * spi, uint8_t * data, uint8_t * out, uint32_t size);

9
libraries/SPI/src/SPI.cpp
View File

@ -128,8 +128,7 @@ void SPIClass::write(uint8_t data)
uint8_t SPIClass::transfer(uint8_t data)
{
spiWriteByte(_spi, data);
return spiReadByte(_spi);
return spiTransferByte(_spi, data);
}
void SPIClass::write16(uint16_t data)
@ -139,8 +138,7 @@ void SPIClass::write16(uint16_t data)
uint16_t SPIClass::transfer16(uint16_t data)
{
spiWriteWord(_spi, data);
return spiReadWord(_spi);
return spiTransferWord(_spi, data);
}
void SPIClass::write32(uint32_t data)
@ -150,8 +148,7 @@ void SPIClass::write32(uint32_t data)
uint32_t SPIClass::transfer32(uint32_t data)
{
spiWriteLong(_spi, data);
return spiReadLong(_spi);
return spiTransferLong(_spi, data);
}
void SPIClass::transferBits(uint32_t data, uint32_t * out, uint8_t bits)