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Tasmota/lib/lib_i2c/Adafruit_BusIO/Adafruit_SPIDevice.cpp
Roberto Bonacina 9f752b9230 Adafruit_BusIO: bump library to version 1.11.0 
The previous included version (1.0.10) was failing to read more than
32 bytes of data from I2C devices (tested on AMG8833 which typically
reads 128 bytes -whose support is in progress-).
The problem was fixed in version 1.9.0.
Currently, this library is required and used just by the
Adafruit_VEML7700 library.
The VEML7700 sensor has been tested and proved to correctly work.

Signed-off-by: Roberto Bonacina <roby.bonacina@tutanota.com>
2022-02-09 11:00:28 +01:00

500 lines
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#include "Adafruit_SPIDevice.h"
#if !defined(SPI_INTERFACES_COUNT) || \
(defined(SPI_INTERFACES_COUNT) && (SPI_INTERFACES_COUNT > 0))
//#define DEBUG_SERIAL Serial
/*!
* @brief Create an SPI device with the given CS pin and settings
* @param cspin The arduino pin number to use for chip select
* @param freq The SPI clock frequency to use, defaults to 1MHz
* @param dataOrder The SPI data order to use for bits within each byte,
* defaults to SPI_BITORDER_MSBFIRST
* @param dataMode The SPI mode to use, defaults to SPI_MODE0
* @param theSPI The SPI bus to use, defaults to &theSPI
*/
Adafruit_SPIDevice::Adafruit_SPIDevice(int8_t cspin, uint32_t freq,
BusIOBitOrder dataOrder,
uint8_t dataMode, SPIClass *theSPI) {
_cs = cspin;
_sck = _mosi = _miso = -1;
_spi = theSPI;
_begun = false;
_spiSetting = new SPISettings(freq, dataOrder, dataMode);
_freq = freq;
_dataOrder = dataOrder;
_dataMode = dataMode;
}
/*!
* @brief Create an SPI device with the given CS pin and settings
* @param cspin The arduino pin number to use for chip select
* @param sckpin The arduino pin number to use for SCK
* @param misopin The arduino pin number to use for MISO, set to -1 if not
* used
* @param mosipin The arduino pin number to use for MOSI, set to -1 if not
* used
* @param freq The SPI clock frequency to use, defaults to 1MHz
* @param dataOrder The SPI data order to use for bits within each byte,
* defaults to SPI_BITORDER_MSBFIRST
* @param dataMode The SPI mode to use, defaults to SPI_MODE0
*/
Adafruit_SPIDevice::Adafruit_SPIDevice(int8_t cspin, int8_t sckpin,
int8_t misopin, int8_t mosipin,
uint32_t freq, BusIOBitOrder dataOrder,
uint8_t dataMode) {
_cs = cspin;
_sck = sckpin;
_miso = misopin;
_mosi = mosipin;
#ifdef BUSIO_USE_FAST_PINIO
csPort = (BusIO_PortReg *)portOutputRegister(digitalPinToPort(cspin));
csPinMask = digitalPinToBitMask(cspin);
if (mosipin != -1) {
mosiPort = (BusIO_PortReg *)portOutputRegister(digitalPinToPort(mosipin));
mosiPinMask = digitalPinToBitMask(mosipin);
}
if (misopin != -1) {
misoPort = (BusIO_PortReg *)portInputRegister(digitalPinToPort(misopin));
misoPinMask = digitalPinToBitMask(misopin);
}
clkPort = (BusIO_PortReg *)portOutputRegister(digitalPinToPort(sckpin));
clkPinMask = digitalPinToBitMask(sckpin);
#endif
_freq = freq;
_dataOrder = dataOrder;
_dataMode = dataMode;
_begun = false;
_spiSetting = new SPISettings(freq, dataOrder, dataMode);
_spi = NULL;
}
/*!
* @brief Release memory allocated in constructors
*/
Adafruit_SPIDevice::~Adafruit_SPIDevice() {
if (_spiSetting) {
delete _spiSetting;
_spiSetting = nullptr;
}
}
/*!
* @brief Initializes SPI bus and sets CS pin high
* @return Always returns true because there's no way to test success of SPI
* init
*/
bool Adafruit_SPIDevice::begin(void) {
if (_cs != -1) {
pinMode(_cs, OUTPUT);
digitalWrite(_cs, HIGH);
}
if (_spi) { // hardware SPI
_spi->begin();
} else {
pinMode(_sck, OUTPUT);
if ((_dataMode == SPI_MODE0) || (_dataMode == SPI_MODE1)) {
// idle low on mode 0 and 1
digitalWrite(_sck, LOW);
} else {
// idle high on mode 2 or 3
digitalWrite(_sck, HIGH);
}
if (_mosi != -1) {
pinMode(_mosi, OUTPUT);
digitalWrite(_mosi, HIGH);
}
if (_miso != -1) {
pinMode(_miso, INPUT);
}
}
_begun = true;
return true;
}
/*!
* @brief Transfer (send/receive) one byte over hard/soft SPI
* @param buffer The buffer to send and receive at the same time
* @param len The number of bytes to transfer
*/
void Adafruit_SPIDevice::transfer(uint8_t *buffer, size_t len) {
if (_spi) {
// hardware SPI is easy
#if defined(SPARK)
_spi->transfer(buffer, buffer, len, NULL);
#elif defined(STM32)
for (size_t i = 0; i < len; i++) {
_spi->transfer(buffer[i]);
}
#else
_spi->transfer(buffer, len);
#endif
return;
}
uint8_t startbit;
if (_dataOrder == SPI_BITORDER_LSBFIRST) {
startbit = 0x1;
} else {
startbit = 0x80;
}
bool towrite, lastmosi = !(buffer[0] & startbit);
uint8_t bitdelay_us = (1000000 / _freq) / 2;
// for softSPI we'll do it by hand
for (size_t i = 0; i < len; i++) {
// software SPI
uint8_t reply = 0;
uint8_t send = buffer[i];
/*
Serial.print("\tSending software SPI byte 0x");
Serial.print(send, HEX);
Serial.print(" -> 0x");
*/
// Serial.print(send, HEX);
for (uint8_t b = startbit; b != 0;
b = (_dataOrder == SPI_BITORDER_LSBFIRST) ? b << 1 : b >> 1) {
if (bitdelay_us) {
delayMicroseconds(bitdelay_us);
}
if (_dataMode == SPI_MODE0 || _dataMode == SPI_MODE2) {
towrite = send & b;
if ((_mosi != -1) && (lastmosi != towrite)) {
#ifdef BUSIO_USE_FAST_PINIO
if (towrite)
*mosiPort |= mosiPinMask;
else
*mosiPort &= ~mosiPinMask;
#else
digitalWrite(_mosi, towrite);
#endif
lastmosi = towrite;
}
#ifdef BUSIO_USE_FAST_PINIO
*clkPort |= clkPinMask; // Clock high
#else
digitalWrite(_sck, HIGH);
#endif
if (bitdelay_us) {
delayMicroseconds(bitdelay_us);
}
if (_miso != -1) {
#ifdef BUSIO_USE_FAST_PINIO
if (*misoPort & misoPinMask) {
#else
if (digitalRead(_miso)) {
#endif
reply |= b;
}
}
#ifdef BUSIO_USE_FAST_PINIO
*clkPort &= ~clkPinMask; // Clock low
#else
digitalWrite(_sck, LOW);
#endif
} else { // if (_dataMode == SPI_MODE1 || _dataMode == SPI_MODE3)
#ifdef BUSIO_USE_FAST_PINIO
*clkPort |= clkPinMask; // Clock high
#else
digitalWrite(_sck, HIGH);
#endif
if (bitdelay_us) {
delayMicroseconds(bitdelay_us);
}
if (_mosi != -1) {
#ifdef BUSIO_USE_FAST_PINIO
if (send & b)
*mosiPort |= mosiPinMask;
else
*mosiPort &= ~mosiPinMask;
#else
digitalWrite(_mosi, send & b);
#endif
}
#ifdef BUSIO_USE_FAST_PINIO
*clkPort &= ~clkPinMask; // Clock low
#else
digitalWrite(_sck, LOW);
#endif
if (_miso != -1) {
#ifdef BUSIO_USE_FAST_PINIO
if (*misoPort & misoPinMask) {
#else
if (digitalRead(_miso)) {
#endif
reply |= b;
}
}
}
if (_miso != -1) {
buffer[i] = reply;
}
}
}
return;
}
/*!
* @brief Transfer (send/receive) one byte over hard/soft SPI
* @param send The byte to send
* @return The byte received while transmitting
*/
uint8_t Adafruit_SPIDevice::transfer(uint8_t send) {
uint8_t data = send;
transfer(&data, 1);
return data;
}
/*!
* @brief Manually begin a transaction (calls beginTransaction if hardware
* SPI)
*/
void Adafruit_SPIDevice::beginTransaction(void) {
if (_spi) {
_spi->beginTransaction(*_spiSetting);
}
}
/*!
* @brief Manually end a transaction (calls endTransaction if hardware SPI)
*/
void Adafruit_SPIDevice::endTransaction(void) {
if (_spi) {
_spi->endTransaction();
}
}
/*!
* @brief Write a buffer or two to the SPI device.
* @param buffer Pointer to buffer of data to write
* @param len Number of bytes from buffer to write
* @param prefix_buffer Pointer to optional array of data to write before
* buffer.
* @param prefix_len Number of bytes from prefix buffer to write
* @return Always returns true because there's no way to test success of SPI
* writes
*/
bool Adafruit_SPIDevice::write(uint8_t *buffer, size_t len,
uint8_t *prefix_buffer, size_t prefix_len) {
if (_spi) {
_spi->beginTransaction(*_spiSetting);
}
setChipSelect(LOW);
// do the writing
#if defined(ARDUINO_ARCH_ESP32)
if (_spi) {
if (prefix_len > 0) {
_spi->transferBytes(prefix_buffer, nullptr, prefix_len);
}
if (len > 0) {
_spi->transferBytes(buffer, nullptr, len);
}
} else
#endif
{
for (size_t i = 0; i < prefix_len; i++) {
transfer(prefix_buffer[i]);
}
for (size_t i = 0; i < len; i++) {
transfer(buffer[i]);
}
}
setChipSelect(HIGH);
if (_spi) {
_spi->endTransaction();
}
#ifdef DEBUG_SERIAL
DEBUG_SERIAL.print(F("\tSPIDevice Wrote: "));
if ((prefix_len != 0) && (prefix_buffer != NULL)) {
for (uint16_t i = 0; i < prefix_len; i++) {
DEBUG_SERIAL.print(F("0x"));
DEBUG_SERIAL.print(prefix_buffer[i], HEX);
DEBUG_SERIAL.print(F(", "));
}
}
for (uint16_t i = 0; i < len; i++) {
DEBUG_SERIAL.print(F("0x"));
DEBUG_SERIAL.print(buffer[i], HEX);
DEBUG_SERIAL.print(F(", "));
if (i % 32 == 31) {
DEBUG_SERIAL.println();
}
}
DEBUG_SERIAL.println();
#endif
return true;
}
/*!
* @brief Read from SPI into a buffer from the SPI device.
* @param buffer Pointer to buffer of data to read into
* @param len Number of bytes from buffer to read.
* @param sendvalue The 8-bits of data to write when doing the data read,
* defaults to 0xFF
* @return Always returns true because there's no way to test success of SPI
* writes
*/
bool Adafruit_SPIDevice::read(uint8_t *buffer, size_t len, uint8_t sendvalue) {
memset(buffer, sendvalue, len); // clear out existing buffer
if (_spi) {
_spi->beginTransaction(*_spiSetting);
}
setChipSelect(LOW);
transfer(buffer, len);
setChipSelect(HIGH);
if (_spi) {
_spi->endTransaction();
}
#ifdef DEBUG_SERIAL
DEBUG_SERIAL.print(F("\tSPIDevice Read: "));
for (uint16_t i = 0; i < len; i++) {
DEBUG_SERIAL.print(F("0x"));
DEBUG_SERIAL.print(buffer[i], HEX);
DEBUG_SERIAL.print(F(", "));
if (len % 32 == 31) {
DEBUG_SERIAL.println();
}
}
DEBUG_SERIAL.println();
#endif
return true;
}
/*!
* @brief Write some data, then read some data from SPI into another buffer.
* The buffers can point to same/overlapping locations. This does not
* transmit-receive at the same time!
* @param write_buffer Pointer to buffer of data to write from
* @param write_len Number of bytes from buffer to write.
* @param read_buffer Pointer to buffer of data to read into.
* @param read_len Number of bytes from buffer to read.
* @param sendvalue The 8-bits of data to write when doing the data read,
* defaults to 0xFF
* @return Always returns true because there's no way to test success of SPI
* writes
*/
bool Adafruit_SPIDevice::write_then_read(uint8_t *write_buffer,
size_t write_len, uint8_t *read_buffer,
size_t read_len, uint8_t sendvalue) {
if (_spi) {
_spi->beginTransaction(*_spiSetting);
}
setChipSelect(LOW);
// do the writing
#if defined(ARDUINO_ARCH_ESP32)
if (_spi) {
if (write_len > 0) {
_spi->transferBytes(write_buffer, nullptr, write_len);
}
} else
#endif
{
for (size_t i = 0; i < write_len; i++) {
transfer(write_buffer[i]);
}
}
#ifdef DEBUG_SERIAL
DEBUG_SERIAL.print(F("\tSPIDevice Wrote: "));
for (uint16_t i = 0; i < write_len; i++) {
DEBUG_SERIAL.print(F("0x"));
DEBUG_SERIAL.print(write_buffer[i], HEX);
DEBUG_SERIAL.print(F(", "));
if (write_len % 32 == 31) {
DEBUG_SERIAL.println();
}
}
DEBUG_SERIAL.println();
#endif
// do the reading
for (size_t i = 0; i < read_len; i++) {
read_buffer[i] = transfer(sendvalue);
}
#ifdef DEBUG_SERIAL
DEBUG_SERIAL.print(F("\tSPIDevice Read: "));
for (uint16_t i = 0; i < read_len; i++) {
DEBUG_SERIAL.print(F("0x"));
DEBUG_SERIAL.print(read_buffer[i], HEX);
DEBUG_SERIAL.print(F(", "));
if (read_len % 32 == 31) {
DEBUG_SERIAL.println();
}
}
DEBUG_SERIAL.println();
#endif
setChipSelect(HIGH);
if (_spi) {
_spi->endTransaction();
}
return true;
}
/*!
* @brief Write some data and read some data at the same time from SPI
* into the same buffer. This is basicaly a wrapper for transfer() with
* CS-pin and transaction management.
* This /does/ transmit-receive at the same time!
* @param buffer Pointer to buffer of data to write/read to/from
* @param len Number of bytes from buffer to write/read.
* @return Always returns true because there's no way to test success of SPI
* writes
*/
bool Adafruit_SPIDevice::write_and_read(uint8_t *buffer, size_t len) {
if (_spi) {
_spi->beginTransaction(*_spiSetting);
}
setChipSelect(LOW);
transfer(buffer, len);
setChipSelect(HIGH);
if (_spi) {
_spi->endTransaction();
}
return true;
}
void Adafruit_SPIDevice::setChipSelect(int value) {
if (_cs == -1)
return;
digitalWrite(_cs, value);
}
#endif // SPI exists
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