11#include "hardware/structs/spi.h"
12#include "hardware/regs/dreq.h"
15#ifndef PARAM_ASSERTIONS_ENABLED_SPI
16#define PARAM_ASSERTIONS_ENABLED_SPI 0
55#define spi0 ((spi_inst_t *)spi0_hw)
63#define spi1 ((spi_inst_t *)spi1_hw)
65#if !defined(PICO_DEFAULT_SPI_INSTANCE) && defined(PICO_DEFAULT_SPI)
66#define PICO_DEFAULT_SPI_INSTANCE (__CONCAT(spi,PICO_DEFAULT_SPI))
69#ifdef PICO_DEFAULT_SPI_INSTANCE
70#define spi_default PICO_DEFAULT_SPI_INSTANCE
152 invalid_params_if(SPI, spi !=
spi0 && spi !=
spi1);
153 return spi ==
spi1 ? 1 : 0;
178 invalid_params_if(SPI, data_bits < 4 || data_bits > 16);
180 invalid_params_if(SPI, order != SPI_MSB_FIRST);
181 invalid_params_if(SPI, cpol != SPI_CPOL_0 && cpol != SPI_CPOL_1);
182 invalid_params_if(SPI, cpha != SPI_CPHA_0 && cpha != SPI_CPHA_1);
185 uint32_t enable_mask = spi_get_hw(spi)->cr1 & SPI_SSPCR1_SSE_BITS;
189 ((uint)(data_bits - 1)) << SPI_SSPCR0_DSS_LSB |
190 ((uint)cpol) << SPI_SSPCR0_SPO_LSB |
191 ((uint)cpha) << SPI_SSPCR0_SPH_LSB,
192 SPI_SSPCR0_DSS_BITS |
193 SPI_SSPCR0_SPO_BITS |
194 SPI_SSPCR0_SPH_BITS);
211 uint32_t enable_mask = spi_get_hw(spi)->cr1 & SPI_SSPCR1_SSE_BITS;
215 hw_set_bits(&spi_get_hw(spi)->cr1, SPI_SSPCR1_MS_BITS);
233 return (spi_get_const_hw(spi)->sr & SPI_SSPSR_TNF_BITS);
243 return (spi_get_const_hw(spi)->sr & SPI_SSPSR_RNE_BITS);
253 return (spi_get_const_hw(spi)->sr & SPI_SSPSR_BSY_BITS);
362 static_assert(DREQ_SPI0_RX == DREQ_SPI0_TX + 1,
"");
363 static_assert(DREQ_SPI1_RX == DREQ_SPI1_TX + 1,
"");
364 static_assert(DREQ_SPI1_TX == DREQ_SPI0_TX + 2,
"");
static __force_inline void hw_set_bits(io_rw_32 *addr, uint32_t mask)
Atomically set the specified bits to 1 in a HW register.
Definition address_mapped.h:121
static __force_inline void hw_write_masked(io_rw_32 *addr, uint32_t values, uint32_t write_mask)
Set new values for a sub-set of the bits in a HW register.
Definition address_mapped.h:157
static __force_inline void hw_clear_bits(io_rw_32 *addr, uint32_t mask)
Atomically clear the specified bits to 0 in a HW register.
Definition address_mapped.h:131
static bool spi_is_writable(const spi_inst_t *spi)
Check whether a write can be done on SPI device.
Definition spi.h:232
static void spi_set_slave(spi_inst_t *spi, bool slave)
Set SPI master/slave.
Definition spi.h:209
static void spi_set_format(spi_inst_t *spi, uint data_bits, spi_cpol_t cpol, spi_cpha_t cpha, __unused spi_order_t order)
Configure SPI.
Definition spi.h:177
uint spi_init(spi_inst_t *spi, uint baudrate)
Initialise SPI instancesPuts the SPI into a known state, and enable it. Must be called before other f...
Definition spi.c:21
static bool spi_is_readable(const spi_inst_t *spi)
Check whether a read can be done on SPI device.
Definition spi.h:242
uint spi_set_baudrate(spi_inst_t *spi, uint baudrate)
Set SPI baudrate.
Definition spi.c:42
#define spi1
Definition spi.h:63
int spi_read_blocking(spi_inst_t *spi, uint8_t repeated_tx_data, uint8_t *dst, size_t len)
Read from an SPI device.
Definition spi.c:136
spi_cpol_t
Enumeration of SPI CPOL (clock polarity) values.
Definition spi.h:84
int spi_write_blocking(spi_inst_t *spi, const uint8_t *src, size_t len)
Write to an SPI device, blocking.
Definition spi.c:107
static bool spi_is_busy(const spi_inst_t *spi)
Check whether SPI is busy.
Definition spi.h:252
static uint spi_get_dreq(spi_inst_t *spi, bool is_tx)
Return the DREQ to use for pacing transfers to/from a particular SPI instance.
Definition spi.h:361
int spi_read16_blocking(spi_inst_t *spi, uint16_t repeated_tx_data, uint16_t *dst, size_t len)
Read from an SPI device.
Definition spi.c:203
static uint spi_get_index(const spi_inst_t *spi)
Convert SPI instance to hardware instance number.
Definition spi.h:151
spi_cpha_t
Enumeration of SPI CPHA (clock phase) values.
Definition spi.h:76
#define spi0
Definition spi.h:55
uint spi_get_baudrate(const spi_inst_t *spi)
Get SPI baudrate.
Definition spi.c:76
spi_order_t
Enumeration of SPI bit-order values.
Definition spi.h:92
int spi_write_read_blocking(spi_inst_t *spi, const uint8_t *src, uint8_t *dst, size_t len)
Write/Read to/from an SPI device.
Definition spi.c:84
int spi_write16_blocking(spi_inst_t *spi, const uint16_t *src, size_t len)
Write to an SPI device.
Definition spi.c:178
int spi_write16_read16_blocking(spi_inst_t *spi, const uint16_t *src, uint16_t *dst, size_t len)
Write/Read half words to/from an SPI device.
Definition spi.c:156
void spi_deinit(spi_inst_t *spi)
Deinitialise SPI instancesPuts the SPI into a disabled state. Init will need to be called to reenable...
Definition spi.c:36
struct spi_inst spi_inst_t
Definition spi.h:47