573 lines
19 KiB
C
573 lines
19 KiB
C
/*
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* @brief LPC11u6x SSP Registers and control functions
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*
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* @note
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* Copyright(C) NXP Semiconductors, 2013
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* All rights reserved.
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*
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* @par
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* Software that is described herein is for illustrative purposes only
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* which provides customers with programming information regarding the
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* LPC products. This software is supplied "AS IS" without any warranties of
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* any kind, and NXP Semiconductors and its licensor disclaim any and
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* all warranties, express or implied, including all implied warranties of
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* merchantability, fitness for a particular purpose and non-infringement of
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* intellectual property rights. NXP Semiconductors assumes no responsibility
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* or liability for the use of the software, conveys no license or rights under any
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* patent, copyright, mask work right, or any other intellectual property rights in
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* or to any products. NXP Semiconductors reserves the right to make changes
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* in the software without notification. NXP Semiconductors also makes no
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* representation or warranty that such application will be suitable for the
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* specified use without further testing or modification.
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*
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* @par
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* Permission to use, copy, modify, and distribute this software and its
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* documentation is hereby granted, under NXP Semiconductors' and its
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* licensor's relevant copyrights in the software, without fee, provided that it
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* is used in conjunction with NXP Semiconductors microcontrollers. This
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* copyright, permission, and disclaimer notice must appear in all copies of
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* this code.
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*/
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#ifndef __SSP_11U6X_H_
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#define __SSP_11U6X_H_
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#ifdef __cplusplus
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extern "C" {
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#endif
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/** @defgroup SSP_11U6X CHIP: LPC11u6x SSP register block and driver
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* @ingroup CHIP_11U6X_Drivers
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* @{
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*/
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/**
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* @brief SSP register block structure
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*/
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typedef struct { /*!< SSPn Structure */
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__IO uint32_t CR0; /*!< Control Register 0. Selects the serial clock rate, bus type, and data size. */
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__IO uint32_t CR1; /*!< Control Register 1. Selects master/slave and other modes. */
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__IO uint32_t DR; /*!< Data Register. Writes fill the transmit FIFO, and reads empty the receive FIFO. */
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__I uint32_t SR; /*!< Status Register */
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__IO uint32_t CPSR; /*!< Clock Prescale Register */
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__IO uint32_t IMSC; /*!< Interrupt Mask Set and Clear Register */
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__I uint32_t RIS; /*!< Raw Interrupt Status Register */
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__I uint32_t MIS; /*!< Masked Interrupt Status Register */
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__O uint32_t ICR; /*!< SSPICR Interrupt Clear Register */
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__O uint32_t DMACR; /*!< DMA control Register */
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} LPC_SSP_T;
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/**
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* Macro defines for CR0 register
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*/
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/** SSP data size select, must be 4 bits to 16 bits */
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#define SSP_CR0_DSS(n) ((uint32_t) ((n) & 0xF))
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/** SSP control 0 Motorola SPI mode */
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#define SSP_CR0_FRF_SPI ((uint32_t) (0 << 4))
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/** SSP control 0 TI synchronous serial mode */
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#define SSP_CR0_FRF_TI ((uint32_t) (1 << 4))
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/** SSP control 0 National Micro-wire mode */
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#define SSP_CR0_FRF_MICROWIRE ((uint32_t) (2 << 4))
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/** SPI clock polarity bit (used in SPI mode only), (1) = maintains the
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bus clock high between frames, (0) = low */
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#define SSP_CR0_CPOL_LO ((uint32_t) (0))
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#define SSP_CR0_CPOL_HI ((uint32_t) (1 << 6))
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/** SPI clock out phase bit (used in SPI mode only), (1) = captures data
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on the second clock transition of the frame, (0) = first */
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#define SSP_CR0_CPHA_FIRST ((uint32_t) (0))
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#define SSP_CR0_CPHA_SECOND ((uint32_t) (1 << 7))
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/** SSP serial clock rate value load macro, divider rate is
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PERIPH_CLK / (cpsr * (SCR + 1)) */
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#define SSP_CR0_SCR(n) ((uint32_t) ((n & 0xFF) << 8))
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/** SSP CR0 bit mask */
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#define SSP_CR0_BITMASK ((uint32_t) (0xFFFF))
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/** SSP CR0 bit mask */
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#define SSP_CR0_BITMASK ((uint32_t) (0xFFFF))
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/** SSP serial clock rate value load macro, divider rate is
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PERIPH_CLK / (cpsr * (SCR + 1)) */
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#define SSP_CR0_SCR(n) ((uint32_t) ((n & 0xFF) << 8))
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/**
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* Macro defines for CR1 register
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*/
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/** SSP control 1 loopback mode enable bit */
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#define SSP_CR1_LBM_EN ((uint32_t) (1 << 0))
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/** SSP control 1 enable bit */
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#define SSP_CR1_SSP_EN ((uint32_t) (1 << 1))
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/** SSP control 1 slave enable */
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#define SSP_CR1_SLAVE_EN ((uint32_t) (1 << 2))
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#define SSP_CR1_MASTER_EN ((uint32_t) (0))
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/** SSP control 1 slave out disable bit, disables transmit line in slave
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mode */
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#define SSP_CR1_SO_DISABLE ((uint32_t) (1 << 3))
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/** SSP CR1 bit mask */
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#define SSP_CR1_BITMASK ((uint32_t) (0x0F))
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/** SSP CPSR bit mask */
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#define SSP_CPSR_BITMASK ((uint32_t) (0xFF))
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/**
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* Macro defines for DR register
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*/
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/** SSP data bit mask */
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#define SSP_DR_BITMASK(n) ((n) & 0xFFFF)
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/**
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* Macro defines for SR register
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*/
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/** SSP SR bit mask */
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#define SSP_SR_BITMASK ((uint32_t) (0x1F))
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/** ICR bit mask */
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#define SSP_ICR_BITMASK ((uint32_t) (0x03))
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/**
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* @brief SSP Type of Status
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*/
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typedef enum _SSP_STATUS {
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SSP_STAT_TFE = ((uint32_t)(1 << 0)),/**< TX FIFO Empty */
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SSP_STAT_TNF = ((uint32_t)(1 << 1)),/**< TX FIFO not full */
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SSP_STAT_RNE = ((uint32_t)(1 << 2)),/**< RX FIFO not empty */
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SSP_STAT_RFF = ((uint32_t)(1 << 3)),/**< RX FIFO full */
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SSP_STAT_BSY = ((uint32_t)(1 << 4)),/**< SSP Busy */
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} SSP_STATUS_T;
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/**
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* @brief SSP Type of Interrupt Mask
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*/
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typedef enum _SSP_INTMASK {
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SSP_RORIM = ((uint32_t)(1 << 0)), /**< Overun */
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SSP_RTIM = ((uint32_t)(1 << 1)),/**< TimeOut */
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SSP_RXIM = ((uint32_t)(1 << 2)),/**< Rx FIFO is at least half full */
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SSP_TXIM = ((uint32_t)(1 << 3)),/**< Tx FIFO is at least half empty */
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SSP_INT_MASK_BITMASK = ((uint32_t)(0xF)),
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} SSP_INTMASK_T;
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/**
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* @brief SSP Type of Mask Interrupt Status
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*/
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typedef enum _SSP_MASKINTSTATUS {
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SSP_RORMIS = ((uint32_t)(1 << 0)), /**< Overun */
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SSP_RTMIS = ((uint32_t)(1 << 1)), /**< TimeOut */
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SSP_RXMIS = ((uint32_t)(1 << 2)), /**< Rx FIFO is at least half full */
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SSP_TXMIS = ((uint32_t)(1 << 3)), /**< Tx FIFO is at least half empty */
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SSP_MASK_INT_STAT_BITMASK = ((uint32_t)(0xF)),
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} SSP_MASKINTSTATUS_T;
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/**
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* @brief SSP Type of Raw Interrupt Status
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*/
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typedef enum _SSP_RAWINTSTATUS {
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SSP_RORRIS = ((uint32_t)(1 << 0)), /**< Overun */
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SSP_RTRIS = ((uint32_t)(1 << 1)), /**< TimeOut */
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SSP_RXRIS = ((uint32_t)(1 << 2)), /**< Rx FIFO is at least half full */
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SSP_TXRIS = ((uint32_t)(1 << 3)), /**< Tx FIFO is at least half empty */
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SSP_RAW_INT_STAT_BITMASK = ((uint32_t)(0xF)),
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} SSP_RAWINTSTATUS_T;
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typedef enum _SSP_INTCLEAR {
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SSP_RORIC = 0x0,
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SSP_RTIC = 0x1,
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SSP_INT_CLEAR_BITMASK = 0x3,
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} SSP_INTCLEAR_T;
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/*
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* @brief SSP clock format
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*/
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typedef enum CHIP_SSP_CLOCK_FORMAT {
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SSP_CLOCK_CPHA0_CPOL0 = (0 << 6), /**< CPHA = 0, CPOL = 0 */
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SSP_CLOCK_CPHA0_CPOL1 = (1u << 6), /**< CPHA = 0, CPOL = 1 */
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SSP_CLOCK_CPHA1_CPOL0 = (2u << 6), /**< CPHA = 1, CPOL = 0 */
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SSP_CLOCK_CPHA1_CPOL1 = (3u << 6), /**< CPHA = 1, CPOL = 1 */
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SSP_CLOCK_MODE0 = SSP_CLOCK_CPHA0_CPOL0,/**< alias */
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SSP_CLOCK_MODE1 = SSP_CLOCK_CPHA1_CPOL0,/**< alias */
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SSP_CLOCK_MODE2 = SSP_CLOCK_CPHA0_CPOL1,/**< alias */
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SSP_CLOCK_MODE3 = SSP_CLOCK_CPHA1_CPOL1,/**< alias */
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} CHIP_SSP_CLOCK_MODE_T;
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/*
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* @brief SSP frame format
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*/
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typedef enum CHIP_SSP_FRAME_FORMAT {
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SSP_FRAMEFORMAT_SPI = (0 << 4), /**< Frame format: SPI */
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CHIP_SSP_FRAME_FORMAT_TI = (1u << 4), /**< Frame format: TI SSI */
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SSP_FRAMEFORMAT_MICROWIRE = (2u << 4), /**< Frame format: Microwire */
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} CHIP_SSP_FRAME_FORMAT_T;
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/*
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* @brief Number of bits per frame
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*/
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typedef enum CHIP_SSP_BITS {
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SSP_BITS_4 = (3u << 0), /*!< 4 bits/frame */
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SSP_BITS_5 = (4u << 0), /*!< 5 bits/frame */
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SSP_BITS_6 = (5u << 0), /*!< 6 bits/frame */
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SSP_BITS_7 = (6u << 0), /*!< 7 bits/frame */
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SSP_BITS_8 = (7u << 0), /*!< 8 bits/frame */
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SSP_BITS_9 = (8u << 0), /*!< 9 bits/frame */
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SSP_BITS_10 = (9u << 0), /*!< 10 bits/frame */
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SSP_BITS_11 = (10u << 0), /*!< 11 bits/frame */
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SSP_BITS_12 = (11u << 0), /*!< 12 bits/frame */
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SSP_BITS_13 = (12u << 0), /*!< 13 bits/frame */
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SSP_BITS_14 = (13u << 0), /*!< 14 bits/frame */
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SSP_BITS_15 = (14u << 0), /*!< 15 bits/frame */
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SSP_BITS_16 = (15u << 0), /*!< 16 bits/frame */
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} CHIP_SSP_BITS_T;
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/*
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* @brief SSP config format
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*/
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typedef struct SSP_ConfigFormat {
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CHIP_SSP_BITS_T bits; /*!< Format config: bits/frame */
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CHIP_SSP_CLOCK_MODE_T clockMode; /*!< Format config: clock phase/polarity */
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CHIP_SSP_FRAME_FORMAT_T frameFormat; /*!< Format config: SPI/TI/Microwire */
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} SSP_ConfigFormat;
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/**
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* @brief Enable SSP operation
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* @param pSSP : The base of SSP peripheral on the chip
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* @return Nothing
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*/
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STATIC INLINE void Chip_SSP_Enable(LPC_SSP_T *pSSP)
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{
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pSSP->CR1 |= SSP_CR1_SSP_EN;
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}
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/**
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* @brief Disable SSP operation
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* @param pSSP : The base of SSP peripheral on the chip
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* @return Nothing
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*/
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STATIC INLINE void Chip_SSP_Disable(LPC_SSP_T *pSSP)
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{
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pSSP->CR1 &= (~SSP_CR1_SSP_EN) & SSP_CR1_BITMASK;
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}
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/**
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* @brief Enable loopback mode
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* @param pSSP : The base of SSP peripheral on the chip
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* @return Nothing
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* @note Serial input is taken from the serial output (MOSI or MISO) rather
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* than the serial input pin
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*/
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STATIC INLINE void Chip_SSP_EnableLoopBack(LPC_SSP_T *pSSP)
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{
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pSSP->CR1 |= SSP_CR1_LBM_EN;
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}
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/**
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* @brief Disable loopback mode
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* @param pSSP : The base of SSP peripheral on the chip
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* @return Nothing
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* @note Serial input is taken from the serial output (MOSI or MISO) rather
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* than the serial input pin
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*/
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STATIC INLINE void Chip_SSP_DisableLoopBack(LPC_SSP_T *pSSP)
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{
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pSSP->CR1 &= (~SSP_CR1_LBM_EN) & SSP_CR1_BITMASK;
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}
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/**
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* @brief Get the current status of SSP controller
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* @param pSSP : The base of SSP peripheral on the chip
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* @param Stat : Type of status, should be :
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* - SSP_STAT_TFE
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* - SSP_STAT_TNF
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* - SSP_STAT_RNE
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* - SSP_STAT_RFF
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* - SSP_STAT_BSY
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* @return SSP controller status, SET or RESET
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*/
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STATIC INLINE FlagStatus Chip_SSP_GetStatus(LPC_SSP_T *pSSP, SSP_STATUS_T Stat)
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{
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return (pSSP->SR & Stat) ? SET : RESET;
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}
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/**
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* @brief Get the masked interrupt status
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* @param pSSP : The base of SSP peripheral on the chip
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* @return SSP Masked Interrupt Status Register value
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* @note The return value contains a 1 for each interrupt condition that is asserted and enabled (masked)
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*/
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STATIC INLINE uint32_t Chip_SSP_GetIntStatus(LPC_SSP_T *pSSP)
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{
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return pSSP->MIS;
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}
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/**
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* @brief Get the raw interrupt status
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* @param pSSP : The base of SSP peripheral on the chip
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* @param RawInt : Interrupt condition to be get status, shoud be :
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* - SSP_RORRIS
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* - SSP_RTRIS
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* - SSP_RXRIS
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* - SSP_TXRIS
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* @return Raw interrupt status corresponding to interrupt condition , SET or RESET
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* @note Get the status of each interrupt condition ,regardless of whether or not the interrupt is enabled
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*/
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STATIC INLINE IntStatus Chip_SSP_GetRawIntStatus(LPC_SSP_T *pSSP, SSP_RAWINTSTATUS_T RawInt)
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{
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return (pSSP->RIS & RawInt) ? SET : RESET;
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}
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/**
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* @brief Get the number of bits transferred in each frame
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* @param pSSP : The base of SSP peripheral on the chip
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* @return the number of bits transferred in each frame minus one
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* @note The return value is 0x03 -> 0xF corresponding to 4bit -> 16bit transfer
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*/
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STATIC INLINE uint8_t Chip_SSP_GetDataSize(LPC_SSP_T *pSSP)
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{
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return SSP_CR0_DSS(pSSP->CR0);
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}
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/**
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* @brief Clear the corresponding interrupt condition(s) in the SSP controller
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* @param pSSP : The base of SSP peripheral on the chip
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* @param IntClear: Type of cleared interrupt, should be :
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* - SSP_RORIC
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* - SSP_RTIC
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* @return Nothing
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* @note Software can clear one or more interrupt condition(s) in the SSP controller
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*/
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STATIC INLINE void Chip_SSP_ClearIntPending(LPC_SSP_T *pSSP, SSP_INTCLEAR_T IntClear)
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{
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pSSP->ICR = IntClear;
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}
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/**
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* @brief Enable interrupt for the SSP
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* @param pSSP : The base of SSP peripheral on the chip
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* @return Nothing
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*/
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STATIC INLINE void Chip_SSP_Int_Enable(LPC_SSP_T *pSSP)
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{
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pSSP->IMSC |= SSP_TXIM;
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}
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/**
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* @brief Disable interrupt for the SSP
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* @param pSSP : The base of SSP peripheral on the chip
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* @return Nothing
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*/
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STATIC INLINE void Chip_SSP_Int_Disable(LPC_SSP_T *pSSP)
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{
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pSSP->IMSC &= (~SSP_TXIM);
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}
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/**
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* @brief Get received SSP data
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* @param pSSP : The base of SSP peripheral on the chip
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* @return SSP 16-bit data received
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*/
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STATIC INLINE uint16_t Chip_SSP_ReceiveFrame(LPC_SSP_T *pSSP)
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{
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return (uint16_t) (SSP_DR_BITMASK(pSSP->DR));
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}
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/**
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* @brief Send SSP 16-bit data
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* @param pSSP : The base of SSP peripheral on the chip
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* @param tx_data : SSP 16-bit data to be transmited
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* @return Nothing
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*/
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STATIC INLINE void Chip_SSP_SendFrame(LPC_SSP_T *pSSP, uint16_t tx_data)
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{
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pSSP->DR = SSP_DR_BITMASK(tx_data);
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}
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/**
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* @brief Set up output clocks per bit for SSP bus
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* @param pSSP : The base of SSP peripheral on the chip
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* @param clk_rate fs: The number of prescaler-output clocks per bit on the bus, minus one
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* @param prescale : The factor by which the Prescaler divides the SSP peripheral clock PCLK
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* @return Nothing
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* @note The bit frequency is PCLK / (prescale x[clk_rate+1])
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*/
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void Chip_SSP_SetClockRate(LPC_SSP_T *pSSP, uint32_t clk_rate, uint32_t prescale);
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/**
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* @brief Set up the SSP frame format
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* @param pSSP : The base of SSP peripheral on the chip
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* @param bits : The number of bits transferred in each frame, should be SSP_BITS_4 to SSP_BITS_16
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* @param frameFormat : Frame format, should be :
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* - SSP_FRAMEFORMAT_SPI
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* - SSP_FRAME_FORMAT_TI
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* - SSP_FRAMEFORMAT_MICROWIRE
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* @param clockMode : Select Clock polarity and Clock phase, should be :
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* - SSP_CLOCK_CPHA0_CPOL0
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* - SSP_CLOCK_CPHA0_CPOL1
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* - SSP_CLOCK_CPHA1_CPOL0
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* - SSP_CLOCK_CPHA1_CPOL1
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* @return Nothing
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* @note Note: The clockFormat is only used in SPI mode
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*/
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STATIC INLINE void Chip_SSP_SetFormat(LPC_SSP_T *pSSP, uint32_t bits, uint32_t frameFormat, uint32_t clockMode)
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{
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pSSP->CR0 = (pSSP->CR0 & ~0xFF) | bits | frameFormat | clockMode;
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}
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/**
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* @brief Set the SSP working as master or slave mode
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* @param pSSP : The base of SSP peripheral on the chip
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* @param mode : Operating mode, should be
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* - SSP_MODE_MASTER
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* - SSP_MODE_SLAVE
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* @return Nothing
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*/
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STATIC INLINE void Chip_SSP_Set_Mode(LPC_SSP_T *pSSP, uint32_t mode)
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{
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pSSP->CR1 = (pSSP->CR1 & ~(1 << 2)) | mode;
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}
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/*
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* @brief SSP mode
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*/
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typedef enum CHIP_SSP_MODE {
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SSP_MODE_MASTER = (0 << 2), /**< Master mode */
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SSP_MODE_SLAVE = (1u << 2), /**< Slave mode */
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} CHIP_SSP_MODE_T;
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/*
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* @brief SPI address
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*/
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typedef struct {
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uint8_t port; /*!< Port Number */
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uint8_t pin; /*!< Pin number */
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} SPI_Address_t;
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/*
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* @brief SSP data setup structure
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*/
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typedef struct {
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void *tx_data; /*!< Pointer to transmit data */
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uint32_t tx_cnt; /*!< Transmit counter */
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void *rx_data; /*!< Pointer to transmit data */
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uint32_t rx_cnt; /*!< Receive counter */
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uint32_t length; /*!< Length of transfer data */
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} Chip_SSP_DATA_SETUP_T;
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/** SSP configuration parameter defines */
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/** Clock phase control bit */
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#define SSP_CPHA_FIRST SSP_CR0_CPHA_FIRST
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#define SSP_CPHA_SECOND SSP_CR0_CPHA_SECOND
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/** Clock polarity control bit */
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/* There's no bug here!!!
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* - If bit[6] in SSPnCR0 is 0: SSP controller maintains the bus clock low between frames.
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* That means the active clock is in HI state.
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* - If bit[6] in SSPnCR0 is 1 (SSP_CR0_CPOL_HI): SSP controller maintains the bus clock
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* high between frames. That means the active clock is in LO state.
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*/
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#define SSP_CPOL_HI SSP_CR0_CPOL_LO
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#define SSP_CPOL_LO SSP_CR0_CPOL_HI
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/** SSP master mode enable */
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#define SSP_SLAVE_MODE SSP_CR1_SLAVE_EN
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#define SSP_MASTER_MODE SSP_CR1_MASTER_EN
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/**
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* @brief Clean all data in RX FIFO of SSP
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* @param pSSP : The base SSP peripheral on the chip
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* @return Nothing
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*/
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void Chip_SSP_Int_FlushData(LPC_SSP_T *pSSP);
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/**
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* @brief SSP Interrupt Read/Write with 8-bit frame width
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* @param pSSP : The base SSP peripheral on the chip
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* @param xf_setup : Pointer to a SSP_DATA_SETUP_T structure that contains specified
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* information about transmit/receive data configuration
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* @return SUCCESS or ERROR
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*/
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Status Chip_SSP_Int_RWFrames8Bits(LPC_SSP_T *pSSP, Chip_SSP_DATA_SETUP_T *xf_setup);
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/**
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* @brief SSP Interrupt Read/Write with 16-bit frame width
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* @param pSSP : The base SSP peripheral on the chip
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* @param xf_setup : Pointer to a SSP_DATA_SETUP_T structure that contains specified
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* information about transmit/receive data configuration
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* @return SUCCESS or ERROR
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*/
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Status Chip_SSP_Int_RWFrames16Bits(LPC_SSP_T *pSSP, Chip_SSP_DATA_SETUP_T *xf_setup);
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/**
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* @brief SSP Polling Read/Write in blocking mode
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* @param pSSP : The base SSP peripheral on the chip
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* @param xf_setup : Pointer to a SSP_DATA_SETUP_T structure that contains specified
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* information about transmit/receive data configuration
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* @return Actual data length has been transferred
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* @note
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* This function can be used in both master and slave mode. It starts with writing phase and after that,
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* a reading phase is generated to read any data available in RX_FIFO. All needed information is prepared
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* through xf_setup param.
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*/
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uint32_t Chip_SSP_RWFrames_Blocking(LPC_SSP_T *pSSP, Chip_SSP_DATA_SETUP_T *xf_setup);
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/**
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* @brief SSP Polling Write in blocking mode
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* @param pSSP : The base SSP peripheral on the chip
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* @param buffer : Buffer address
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* @param buffer_len : Buffer length
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* @return Actual data length has been transferred
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* @note
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* This function can be used in both master and slave mode. First, a writing operation will send
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* the needed data. After that, a dummy reading operation is generated to clear data buffer
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*/
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uint32_t Chip_SSP_WriteFrames_Blocking(LPC_SSP_T *pSSP, uint8_t *buffer, uint32_t buffer_len);
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/**
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* @brief SSP Polling Read in blocking mode
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* @param pSSP : The base SSP peripheral on the chip
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* @param buffer : Buffer address
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* @param buffer_len : The length of buffer
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* @return Actual data length has been transferred
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* @note
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* This function can be used in both master and slave mode. First, a dummy writing operation is generated
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* to clear data buffer. After that, a reading operation will receive the needed data
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*/
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uint32_t Chip_SSP_ReadFrames_Blocking(LPC_SSP_T *pSSP, uint8_t *buffer, uint32_t buffer_len);
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/**
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* @brief Initialize the SSP
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* @param pSSP : The base SSP peripheral on the chip
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* @return Nothing
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|
*/
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void Chip_SSP_Init(LPC_SSP_T *pSSP);
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|
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/**
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* @brief Deinitialise the SSP
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* @param pSSP : The base of SSP peripheral on the chip
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* @return Nothing
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* @note The SSP controller is disabled
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*/
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void Chip_SSP_DeInit(LPC_SSP_T *pSSP);
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|
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/**
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* @brief Set the SSP operating modes, master or slave
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|
* @param pSSP : The base SSP peripheral on the chip
|
|
* @param master : 1 to set master, 0 to set slave
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* @return Nothing
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|
*/
|
|
void Chip_SSP_SetMaster(LPC_SSP_T *pSSP, bool master);
|
|
|
|
/**
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|
* @brief Set the clock frequency for SSP interface
|
|
* @param pSSP : The base SSP peripheral on the chip
|
|
* @param bitRate : The SSP bit rate
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|
* @return Nothing
|
|
*/
|
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void Chip_SSP_SetBitRate(LPC_SSP_T *pSSP, uint32_t bitRate);
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|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
#ifdef __cplusplus
|
|
}
|
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#endif
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|
|
#endif /* __SSP_11U6X_H_ */
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