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Add parameter for SPI clock frequency to begin_SPI() functions #99

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Add parameter for SPI clock frequency to begin_SPI() functions #99

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10 changes: 6 additions & 4 deletions src/Adafruit_MCP23XXX.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -41,13 +41,14 @@ bool Adafruit_MCP23XXX::begin_I2C(uint8_t i2c_addr, TwoWire *wire) {
@param cs_pin Pin to use for SPI chip select
@param theSPI Pointer to SPI instance
@param _hw_addr Hardware address (pins A2, A1, A0)
@param freq SPI clock frequency to use in Hz. Defaults to 1MHz
@return true if initialization successful, otherwise false.
*/
/**************************************************************************/
bool Adafruit_MCP23XXX::begin_SPI(uint8_t cs_pin, SPIClass *theSPI,
uint8_t _hw_addr) {
uint8_t _hw_addr, uint32_t freq) {
this->hw_addr = _hw_addr;
spi_dev = new Adafruit_SPIDevice(cs_pin, 1000000, SPI_BITORDER_MSBFIRST,
spi_dev = new Adafruit_SPIDevice(cs_pin, freq, SPI_BITORDER_MSBFIRST,
SPI_MODE0, theSPI);
return spi_dev->begin();
}
Expand All @@ -60,14 +61,15 @@ bool Adafruit_MCP23XXX::begin_SPI(uint8_t cs_pin, SPIClass *theSPI,
@param miso_pin Pin to use for SPI MISO
@param mosi_pin Pin to use for SPI MOSI
@param _hw_addr Hardware address (pins A2, A1, A0)
@param freq SPI clock frequency to use in Hz. Defaults to 1MHz
@return true if initialization successful, otherwise false.
*/
/**************************************************************************/
bool Adafruit_MCP23XXX::begin_SPI(int8_t cs_pin, int8_t sck_pin,
int8_t miso_pin, int8_t mosi_pin,
uint8_t _hw_addr) {
uint8_t _hw_addr, uint32_t freq) {
this->hw_addr = _hw_addr;
spi_dev = new Adafruit_SPIDevice(cs_pin, sck_pin, miso_pin, mosi_pin);
spi_dev = new Adafruit_SPIDevice(cs_pin, sck_pin, miso_pin, mosi_pin, freq);
return spi_dev->begin();
}

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5 changes: 3 additions & 2 deletions src/Adafruit_MCP23XXX.h
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Original file line number Diff line number Diff line change
Expand Up @@ -42,9 +42,10 @@ class Adafruit_MCP23XXX {
// init
bool begin_I2C(uint8_t i2c_addr = MCP23XXX_ADDR, TwoWire *wire = &Wire);
bool begin_SPI(uint8_t cs_pin, SPIClass *theSPI = &SPI,
uint8_t _hw_addr = 0x00);
uint8_t _hw_addr = 0x00, uint32_t freq = 1000000);
bool begin_SPI(int8_t cs_pin, int8_t sck_pin, int8_t miso_pin,
int8_t mosi_pin, uint8_t _hw_addr = 0x00);
int8_t mosi_pin, uint8_t _hw_addr = 0x00,
uint32_t freq = 1000000);

// main Arduino API methods
void pinMode(uint8_t pin, uint8_t mode);
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