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Add beginTransaction to HAL SPI (#9019)

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revilor 2018-01-03 12:12:25 +01:00 committed by Scott Lahteine
parent fc67c64b8f
commit 959a2d2527
6 changed files with 122 additions and 3 deletions
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76
Marlin/src/HAL/HAL_AVR/HAL_spi_AVR.cpp
View file

@ -1,4 +1,4 @@
/**
/*
* Marlin 3D Printer Firmware
* Copyright (C) 2016 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
*
@ -94,6 +94,8 @@ void spiBegin (void) {
SPCR = _BV(SPE) | _BV(MSTR) | (spiRate >> 1);
SPSR = spiRate & 1 || spiRate == 6 ? 0 : _BV(SPI2X);
}
//------------------------------------------------------------------------------
/** SPI receive a byte */
uint8_t spiRec(void) {
@ -132,6 +134,72 @@ void spiBegin (void) {
}
while (!TEST(SPSR, SPIF)) { /* Intentionally left empty */ }
}
/** begin spi transaction */
void spiBeginTransaction(uint32_t spiClock, uint8_t bitOrder, uint8_t dataMode) {
// Based on Arduino SPI library
// Clock settings are defined as follows. Note that this shows SPI2X
// inverted, so the bits form increasing numbers. Also note that
// fosc/64 appears twice
// SPR1 SPR0 ~SPI2X Freq
// 0 0 0 fosc/2
// 0 0 1 fosc/4
// 0 1 0 fosc/8
// 0 1 1 fosc/16
// 1 0 0 fosc/32
// 1 0 1 fosc/64
// 1 1 0 fosc/64
// 1 1 1 fosc/128
// We find the fastest clock that is less than or equal to the
// given clock rate. The clock divider that results in clock_setting
// is 2 ^^ (clock_div + 1). If nothing is slow enough, we'll use the
// slowest (128 == 2 ^^ 7, so clock_div = 6).
uint8_t clockDiv;
// When the clock is known at compiletime, use this if-then-else
// cascade, which the compiler knows how to completely optimize
// away. When clock is not known, use a loop instead, which generates
// shorter code.
if (__builtin_constant_p(spiClock)) {
if (spiClock >= F_CPU / 2) {
clockDiv = 0;
} else if (spiClock >= F_CPU / 4) {
clockDiv = 1;
} else if (spiClock >= F_CPU / 8) {
clockDiv = 2;
} else if (spiClock >= F_CPU / 16) {
clockDiv = 3;
} else if (spiClock >= F_CPU / 32) {
clockDiv = 4;
} else if (spiClock >= F_CPU / 64) {
clockDiv = 5;
} else {
clockDiv = 6;
}
} else {
uint32_t clockSetting = F_CPU / 2;
clockDiv = 0;
while (clockDiv < 6 && spiClock < clockSetting) {
clockSetting /= 2;
clockDiv++;
}
}
// Compensate for the duplicate fosc/64
if (clockDiv == 6)
clockDiv = 7;
// Invert the SPI2X bit
clockDiv ^= 0x1;
SPCR = _BV(SPE) | _BV(MSTR) | ((bitOrder == SPI_LSBFIRST) ? _BV(DORD) : 0) |
(dataMode << CPHA) | ((clockDiv >> 1) << SPR0);
SPSR = clockDiv | 0x01;
}
//------------------------------------------------------------------------------
#else // SOFTWARE_SPI
//------------------------------------------------------------------------------
@ -144,6 +212,12 @@ void spiBegin (void) {
UNUSED(spiRate);
}
/** Begin SPI transaction, set clock, bit order, data mode */
void spiBeginTransaction(uint32_t spiClock, uint8_t bitOrder, uint8_t dataMode) {
// nothing to do
UNUSED(spiBeginTransaction);
}
//------------------------------------------------------------------------------
/** Soft SPI receive byte */
uint8_t spiRec() {

13
Marlin/src/HAL/HAL_DUE/HAL_spi_Due.cpp
View file

@ -571,6 +571,12 @@
WRITE(SCK_PIN, LOW);
}
/** Begin SPI transaction, set clock, bit order, data mode */
void spiBeginTransaction(uint32_t spiClock, uint8_t bitOrder, uint8_t dataMode) {
// TODO: to be implemented
}
#pragma GCC reset_options
#else
@ -767,6 +773,13 @@
}
spiSend(buf[511]);
}
/** Begin SPI transaction, set clock, bit order, data mode */
void spiBeginTransaction(uint32_t spiClock, uint8_t bitOrder, uint8_t dataMode) {
// TODO: to be implemented
}
#endif // ENABLED(SOFTWARE_SPI)
#endif // ARDUINO_ARCH_SAM

7
Marlin/src/HAL/HAL_LPC1768/HAL_spi.cpp
View file

@ -299,6 +299,13 @@ PinCfg.Portnum = LPC1768_PIN_PORT(MISO_PIN);
// Write from buffer to SPI
void spiSendBlock(uint8_t token, const uint8_t* buf) {
}
/** Begin SPI transaction, set clock, bit order, data mode */
void spiBeginTransaction(uint32_t spiClock, uint8_t bitOrder, uint8_t dataMode) {
// TODO: to be implemented
}
#endif // ENABLED(LPC_SOFTWARE_SPI)
#endif // TARGET_LPC1768

7
Marlin/src/HAL/HAL_STM32F1/HAL_spi_Stm32f1.cpp
View file

@ -164,6 +164,13 @@ void spiSendBlock(uint8_t token, const uint8_t* buf) {
SPI.endTransaction();
}
/** Begin SPI transaction, set clock, bit order, data mode */
void spiBeginTransaction(uint32_t spiClock, uint8_t bitOrder, uint8_t dataMode) {
spiConfig = SPISettings(spiClock, bitOrder, dataMode);
SPI.beginTransaction(spiConfig);
}
#endif // SOFTWARE_SPI
#endif // __STM32F1__

8
Marlin/src/HAL/HAL_TEENSY35_36/HAL_spi_Teensy.cpp
View file

@ -101,4 +101,12 @@ void spiSendBlock(uint8_t token, const uint8_t* buf) {
}
/** Begin SPI transaction, set clock, bit order, data mode */
void spiBeginTransaction(uint32_t spiClock, uint8_t bitOrder, uint8_t dataMode) {
spiConfig = SPISettings(spiClock, bitOrder, dataMode);
SPI.beginTransaction(spiConfig);
}
#endif

10
Marlin/src/HAL/SPI.h
View file

@ -55,6 +55,14 @@
#define SPI_SPEED_5 5 // Set SCK rate to 1/32 of max rate
#define SPI_SPEED_6 6 // Set SCK rate to 1/64 of max rate
#define SPI_LSBFIRST 0
#define SPI_MSBFIRST 1
#define SPI_DATAMODE_0 0x00
#define SPI_DATAMODE_1 0x04
#define SPI_DATAMODE_2 0x08
#define SPI_DATAMODE_3 0x0C
// Standard SPI functions
/** Initialise SPI bus */
void spiBegin(void);
@ -68,5 +76,7 @@ uint8_t spiRec(void);
void spiRead(uint8_t* buf, uint16_t nbyte);
/** Write token and then write from 512 byte buffer to SPI (for SD card) */
void spiSendBlock(uint8_t token, const uint8_t* buf);
/** Begin SPI transaction, set clock, bit order, data mode */
void spiBeginTransaction(uint32_t spiClock, uint8_t bitOrder, uint8_t dataMode);
#endif // _SPI_H_