mirror of
https://github.com/portapack-mayhem/mayhem-firmware.git
synced 2024-12-15 20:50:28 +00:00
286 lines
8.5 KiB
C
Executable File
286 lines
8.5 KiB
C
Executable File
/*
|
|
ChibiOS/RT - Copyright (C) 2006-2013 Giovanni Di Sirio
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
/**
|
|
* @file LPC8xx/spi_lld.h
|
|
* @brief LPC8xx low level SPI driver header.
|
|
*
|
|
* @addtogroup SPI
|
|
* @{
|
|
*/
|
|
|
|
#ifndef _SPI_LLD_H_
|
|
#define _SPI_LLD_H_
|
|
|
|
#if HAL_USE_SPI || defined(__DOXYGEN__)
|
|
|
|
/*===========================================================================*/
|
|
/* Driver constants. */
|
|
/*===========================================================================*/
|
|
|
|
#define SPI_CFG_ENABLE (1<<0)
|
|
#define SPI_CFG_MASTER (1<<2)
|
|
#define SPI_CFG_LSBF (1<<3)
|
|
#define SPI_CFG_CHPA (1<<4)
|
|
#define SPI_CFG_CPOL (1<<5)
|
|
#define SPI_CFG_LOOP (1<<7)
|
|
#define SPI_CFG_SPOL (1<<8)
|
|
|
|
#define SPI_DLY_PRE(n) (((n)&0x0f)<< 0)
|
|
#define SPI_DLY_POST(n) (((n)&0x0f)<< 4)
|
|
#define SPI_DLY_FRAME(n) (((n)&0x0f)<< 8)
|
|
#define SPI_DLY_TFER(n) (((n)&0x0f)<<12)
|
|
|
|
#define SPI_STAT_RXRDY (1<<0)
|
|
#define SPI_STAT_TXRDY (1<<1)
|
|
#define SPI_STAT_RXOV (1<<2)
|
|
#define SPI_STAT_TXUR (1<<3)
|
|
#define SPI_STAT_SSA (1<<4)
|
|
#define SPI_STAT_SSD (1<<5)
|
|
#define SPI_STAT_STALL (1<<6)
|
|
#define SPI_STAT_EOT (1<<7)
|
|
#define SPI_STAT_IDLE (1<<8)
|
|
|
|
#define SPI_TXCTRL_TXSSELN (1<<16)
|
|
#define SPI_TXCTRL_EOT (1<<20)
|
|
#define SPI_TXCTRL_EOF (1<<21)
|
|
#define SPI_TXCTRL_RXIGNORE (1<<22)
|
|
#define SPI_TXCTRL_FLEN(n) (((n)-1)<<24)
|
|
#define SPI_TXCTRL_FLEN_MASK (0x0f<<24)
|
|
|
|
|
|
|
|
/*===========================================================================*/
|
|
/* Driver pre-compile time settings. */
|
|
/*===========================================================================*/
|
|
|
|
/**
|
|
* @brief SPI1 driver enable switch.
|
|
* @details If set to @p TRUE the support for device SPI0 is included.
|
|
* @note The default is @p TRUE.
|
|
*/
|
|
#if !defined(LPC8xx_SPI_USE_SPI0) || defined(__DOXYGEN__)
|
|
#define LPC8xx_SPI_USE_SPI0 TRUE
|
|
#endif
|
|
|
|
/**
|
|
* @brief SPI2 driver enable switch.
|
|
* @details If set to @p TRUE the support for device SPI1 is included.
|
|
* @note The default is @p TRUE.
|
|
*/
|
|
#if !defined(LPC8xx_SPI_USE_SPI1) || defined(__DOXYGEN__)
|
|
#define LPC8xx_SPI_USE_SPI1 FALSE
|
|
#endif
|
|
|
|
/**
|
|
* @brief SPI0 PCLK divider.
|
|
*/
|
|
#if !defined(LPC8xx_SPI_SPI0CLKDIV) || defined(__DOXYGEN__)
|
|
#define LPC8xx_SPI_SPI0CLKDIV 1
|
|
#endif
|
|
|
|
/**
|
|
* @brief SPI1 PCLK divider.
|
|
*/
|
|
#if !defined(LPC8xx_SPI_SPI1CLKDIV) || defined(__DOXYGEN__)
|
|
#define LPC8xx_SPI_SPI1CLKDIV 1
|
|
#endif
|
|
|
|
/**
|
|
* @brief SPI0 interrupt priority level setting.
|
|
*/
|
|
#if !defined(LPC8xx_SPI_SPI0_IRQ_PRIORITY) || defined(__DOXYGEN__)
|
|
#define LPC8xx_SPI_SPI0_IRQ_PRIORITY 1
|
|
#endif
|
|
|
|
/**
|
|
* @brief SPI1 interrupt priority level setting.
|
|
*/
|
|
#if !defined(LPC8xx_SPI_SPI1_IRQ_PRIORITY) || defined(__DOXYGEN__)
|
|
#define LPC8xx_SPI_SPI1_IRQ_PRIORITY 1
|
|
#endif
|
|
|
|
/**
|
|
* @brief Overflow error hook.
|
|
* @details The default action is to stop the system.
|
|
*/
|
|
#if !defined(LPC8xx_SPI_ERROR_HOOK) || defined(__DOXYGEN__)
|
|
#define LPC8xx_SPI_ERROR_HOOK(spip) chSysHalt()
|
|
#endif
|
|
|
|
/*===========================================================================*/
|
|
/* Derived constants and error checks. */
|
|
/*===========================================================================*/
|
|
|
|
#if (LPC8xx_SPI_SPI0CLKDIV < 1) || (LPC8xx_SPI_SPI0CLKDIV > 255)
|
|
#error "invalid LPC8xx_SPI_SSP0CLKDIV setting"
|
|
#endif
|
|
|
|
#if (LPC8xx_SPI_SPI1CLKDIV < 1) || (LPC8xx_SPI_SPI1CLKDIV > 255)
|
|
#error "invalid LPC8xx_SPI_SSP1CLKDIV setting"
|
|
#endif
|
|
|
|
#if !LPC8xx_SPI_USE_SPI0 && !LPC8xx_SPI_USE_SPI1
|
|
#error "SPI driver activated but no SPI peripheral assigned"
|
|
#endif
|
|
|
|
/**
|
|
* @brief SPI0 clock.
|
|
*/
|
|
#define LPC8xx_SPI_SPI0_PCLK \
|
|
(LPC8xx_SYSCLK / LPC8xx_SPI_SPI0CLKDIV)
|
|
|
|
/**
|
|
* @brief SPI1 clock.
|
|
*/
|
|
#define LPC8xx_SPI_SPI1_PCLK \
|
|
(LPC8xx_SYSCLK / LPC8xx_SPI_SPI1CLKDIV)
|
|
|
|
/*===========================================================================*/
|
|
/* Driver data structures and types. */
|
|
/*===========================================================================*/
|
|
|
|
/**
|
|
* @brief Type of a structure representing an SPI driver.
|
|
*/
|
|
typedef struct SPIDriver SPIDriver;
|
|
|
|
/**
|
|
* @brief SPI notification callback type.
|
|
*
|
|
* @param[in] spip pointer to the @p SPIDriver object triggering the
|
|
* callback
|
|
*/
|
|
typedef void (*spicallback_t)(SPIDriver *spip);
|
|
|
|
/**
|
|
* @brief Driver configuration structure.
|
|
*/
|
|
typedef struct {
|
|
/**
|
|
* @brief Operation complete callback or @p NULL.
|
|
*/
|
|
spicallback_t end_cb;
|
|
/* End of the mandatory fields.*/
|
|
|
|
/**
|
|
* @brief SPI CFG initialization data.
|
|
*/
|
|
uint16_t cfg;
|
|
/**
|
|
* @brief SPI DLY initialization data.
|
|
*/
|
|
uint16_t dly;
|
|
/**
|
|
* @brief SPI TXCTRL initialization data.
|
|
*/
|
|
uint32_t txctrl;
|
|
} SPIConfig;
|
|
|
|
/**
|
|
* @brief Structure representing a SPI driver.
|
|
*/
|
|
struct SPIDriver {
|
|
/**
|
|
* @brief Driver state.
|
|
*/
|
|
spistate_t state;
|
|
/**
|
|
* @brief Current configuration data.
|
|
*/
|
|
const SPIConfig *config;
|
|
#if SPI_USE_WAIT || defined(__DOXYGEN__)
|
|
/**
|
|
* @brief Waiting thread.
|
|
*/
|
|
Thread *thread;
|
|
#endif /* SPI_USE_WAIT */
|
|
#if SPI_USE_MUTUAL_EXCLUSION || defined(__DOXYGEN__)
|
|
#if CH_USE_MUTEXES || defined(__DOXYGEN__)
|
|
/**
|
|
* @brief Mutex protecting the bus.
|
|
*/
|
|
Mutex mutex;
|
|
#elif CH_USE_SEMAPHORES
|
|
Semaphore semaphore;
|
|
#endif
|
|
#endif /* SPI_USE_MUTUAL_EXCLUSION */
|
|
#if defined(SPI_DRIVER_EXT_FIELDS)
|
|
SPI_DRIVER_EXT_FIELDS
|
|
#endif
|
|
/* End of the mandatory fields.*/
|
|
/**
|
|
* @brief Pointer to the SPI registers block.
|
|
*/
|
|
LPC_SPI_TypeDef *spi;
|
|
/**
|
|
* @brief Number of words yet to be received.
|
|
*/
|
|
uint32_t rxcnt;
|
|
/**
|
|
* @brief Receive pointer or @p NULL.
|
|
*/
|
|
void *rxptr;
|
|
/**
|
|
* @brief Number of words yet to be transmitted.
|
|
*/
|
|
uint32_t txcnt;
|
|
/**
|
|
* @brief Transmit pointer or @p NULL.
|
|
*/
|
|
const void *txptr;
|
|
};
|
|
|
|
/*===========================================================================*/
|
|
/* Driver macros. */
|
|
/*===========================================================================*/
|
|
|
|
/*===========================================================================*/
|
|
/* External declarations. */
|
|
/*===========================================================================*/
|
|
|
|
#if LPC8xx_SPI_USE_SPI0 && !defined(__DOXYGEN__)
|
|
extern SPIDriver SPID1;
|
|
#endif
|
|
|
|
#if LPC8xx_SPI_USE_SPI1 && !defined(__DOXYGEN__)
|
|
extern SPIDriver SPID2;
|
|
#endif
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
void spi_lld_init(void);
|
|
void spi_lld_start(SPIDriver *spip);
|
|
void spi_lld_stop(SPIDriver *spip);
|
|
void spi_lld_select(SPIDriver *spip);
|
|
void spi_lld_unselect(SPIDriver *spip);
|
|
void spi_lld_ignore(SPIDriver *spip, size_t n);
|
|
void spi_lld_exchange(SPIDriver *spip, size_t n,
|
|
const void *txbuf, void *rxbuf);
|
|
void spi_lld_send(SPIDriver *spip, size_t n, const void *txbuf);
|
|
void spi_lld_receive(SPIDriver *spip, size_t n, void *rxbuf);
|
|
uint16_t spi_lld_polled_exchange(SPIDriver *spip, uint16_t frame);
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* HAL_USE_SPI */
|
|
|
|
#endif /* _SPI_LLD_H_ */
|
|
|
|
/** @} */
|