SPI

Typedefs
typedef enum picoSPIPort	picoSPIPort

Enumerations
enum	picoSPIPort { SPI0, SPI1 }

Functions
void	picoSPIInit (picoSPIPort p, uint32_t clock_rate)
int32_t	picoSPITransfer (picoSPIPort p, picoPin_e ssel, uint8_t *txbuf, uint8_t *rxbuf, int32_t len)

Detailed Description

Serial Peripheral Interface communication API

Available signals and pins:

picoCIAA	Signal
P6_11	SPI0_MOSI
P6_12	SPI0_SCK
P6_14	SPI0_MISO
P6_15	SPI1_MOSI
P6_16	SPI1_SCK
P6_18	SPI1_MISO

Warning

SD interface uses SPI0, do not use SD API and SPI API with SPI0 at the same time!

Typedef Documentation

typedef enum picoSPIPort picoSPIPort

available SPI ports

Enumeration Type Documentation

enum picoSPIPort

available SPI ports

Enumerator
SPI0	SPI0 interface
SPI1	SPI1 interface

Function Documentation

void picoSPIInit	(	picoSPIPort	p,
		uint32_t	clock_rate
	)

initialize SPI port

Parameters

p	port number, SPI0 or SPI1
clock_rate	SPI clock rate

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int32_t picoSPITransfer	(	picoSPIPort	p,
		picoPin_e	ssel,
		uint8_t *	txbuf,
		uint8_t *	rxbuf,
		int32_t	len
	)

transmit and receive data through SPI port (full-duplex)

Parameters

p	port number, SPI0 or SPI1
ssel	digital output to use as slave select, user must previously configure it with picoConfigDigitalOutput and initial value 1 (logic high). If ssel is set as PICOPIN_COUNT, user must take control of SSEL signal.
txbuf	transmit buffer
rxbuf	receive buffer
len	transfer length in bytes

Returns

transfer status, -1 on error

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