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ssp_001.c
Go to the documentation of this file.
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/*
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* @brief SSP Registers and control functions
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*
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* @note
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* Copyright(C) NXP Semiconductors, 2012
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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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#include "
ssp_001.h
"
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/*****************************************************************************
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* Private types/enumerations/variables
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****************************************************************************/
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/*****************************************************************************
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* Public types/enumerations/variables
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****************************************************************************/
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/*****************************************************************************
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* Private functions
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****************************************************************************/
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/*****************************************************************************
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* Public functions
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****************************************************************************/
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/*Set up output clocks per bit for SSP bus*/
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void
IP_SSP_Set_ClockRate
(
IP_SSP_001_Type
*pSSP,
uint32_t
clk_rate,
uint32_t
prescale)
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{
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pSSP->
CR0
&= ~(
SSP_CR0_SCR
(0xFF));
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pSSP->
CR0
|=
SSP_CR0_SCR
(clk_rate);
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pSSP->
CPSR
= prescale;
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}
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/* Set up the SSP frame format */
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void
IP_SSP_Set_Format
(
IP_SSP_001_Type
*pSSP,
uint32_t
bits,
uint32_t
frameFormat,
uint32_t
clockFormat)
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{
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pSSP->
CR0
= (pSSP->
CR0
& ~0xFF) | bits | frameFormat | clockFormat;
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}
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/* Set the SSP working as master or slave mode */
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void
IP_SSP_Set_Mode
(
IP_SSP_001_Type
*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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/* Disable SSP operation */
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void
IP_SSP_DeInit
(
IP_SSP_001_Type
*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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/* Enable/Disable SSP operation */
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void
IP_SSP_Cmd
(
IP_SSP_001_Type
*pSSP,
FunctionalState
NewState)
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{
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if
(NewState ==
ENABLE
) {
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pSSP->
CR1
|=
SSP_CR1_SSP_EN
;
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}
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else
{
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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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/* Send SSP 16-bit data */
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void
IP_SSP_SendFrame
(
IP_SSP_001_Type
*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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/* Get received SSP data */
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uint16_t
IP_SSP_ReceiveFrame
(
IP_SSP_001_Type
*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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/* Enable/Disable loopback mode */
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void
IP_SSP_LoopBackCmd
(
IP_SSP_001_Type
*pSSP,
FunctionalState
NewState)
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{
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if
(NewState ==
ENABLE
) {
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pSSP->
CR1
|=
SSP_CR1_LBM_EN
;
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}
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else
{
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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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/* Get the raw interrupt status */
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IntStatus
IP_SSP_GetRawIntStatus
(
IP_SSP_001_Type
*pSSP,
SSP_Raw_Int_Status_Type
RawInt)
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{
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return
(pSSP->
RIS
& RawInt) ?
SET
:
RESET
;
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}
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/* Get the masked interrupt status */
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uint32_t
IP_SSP_GetIntStatus
(
IP_SSP_001_Type
*pSSP)
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{
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return
pSSP->
MIS
;
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}
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/* Clear the corresponding interrupt condition(s) in the SSP controller */
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void
IP_SSP_ClearIntPending
(
IP_SSP_001_Type
*pSSP,
SSP_Int_Clear_Type
IntClear)
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{
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pSSP->
ICR
= IntClear;
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}
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/* Get the current status of SSP controller */
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FlagStatus
IP_SSP_GetStatus
(
IP_SSP_001_Type
*pSSP,
SSP_Status_Type
Stat
)
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{
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return
(pSSP->
SR
& Stat) ?
SET
:
RESET
;
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}
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/* Get the number of bits transferred in each frame */
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uint8_t
IP_SSP_GetDataSize
(
IP_SSP_001_Type
*pSSP)
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{
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return
SSP_CR0_DSS
(pSSP->
CR0
);
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}
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/* Enable/Disable interrupt for the SSP */
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void
IP_SSP_Int_Enable
(
IP_SSP_001_Type
*pSSP,
SSP_Int_Mask_Type
IntType,
FunctionalState
NewState)
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{
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if
(NewState ==
ENABLE
) {
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pSSP->
IMSC
|= IntType;
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}
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else
{
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pSSP->
IMSC
&= (~IntType);
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}
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}
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/* Enable/Disable DMA for SSP */
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void
IP_SSP_DMA_Cmd
(
IP_SSP_001_Type
*pSSP,
SSP_DMA_Type
ssp_dma_t,
FunctionalState
NewState)
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{
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#if !defined(CHIP_LPC111X_CXX) && !defined(CHIP_LPC11UXX)
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if
(NewState ==
ENABLE
) {
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pSSP->
DMACR
|= ssp_dma_t;
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}
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else
{
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pSSP->
DMACR
&= (~ssp_dma_t);
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}
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#endif
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}
software
lpc_core
lpc_ip
ssp_001.c
Generated on Fri Nov 16 2012 13:36:44 for LPCOpen Platform by
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