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Add support for SPI NOR chip select

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git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@2938 42af7a65-404d-4744-a932-0658087f49c3
This commit is contained in:
patacongo 2010-09-11 02:53:07 +00:00
parent 3146413533
commit e28f395393
1 changed files with 67 additions and 45 deletions
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112
arch/arm/src/lpc313x/lpc313x_internal.h
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@ -1,7 +1,7 @@
/************************************************************************************
* arch/arm/src/lpc313x/lpc313x_internal.h
*
* Copyright (C) 2009 Gregory Nutt. All rights reserved.
* Copyright (C) 2009-2010 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
*
* Redistribution and use in source and binary forms, with or without
@ -47,7 +47,9 @@
#include <stdbool.h>
#include "up_internal.h"
#include "up_arch.h"
#include "chip.h"
#include "lpc313x_ioconfig.h"
/************************************************************************************
* Definitions
@ -79,6 +81,70 @@ extern "C" {
#define EXTERN extern
#endif
/************************************************************************************
* Inline Functions
************************************************************************************/
/* Configure a pin as an input */
static inline void gpio_configinput(uint32_t ioconfig, uint32_t bit)
{
uint32_t regaddr;
regaddr = ioconfig + LPC313X_IOCONFIG_MODE0RESET_OFFSET;
putreg32(bit, regaddr);
regaddr = ioconfig + LPC313X_IOCONFIG_MODE1RESET_OFFSET;
putreg32(bit, regaddr);
}
/* Return the current state of an input GPIO pin */
static inline bool lpc313x_gpioread(uint32_t ioconfig, uint32_t bit)
{
uint32_t regaddr = ioconfig + LPC313X_IOCONFIG_PINS_OFFSET;
return (getreg32(regaddr) & bit) != 0;
}
/* Configure the pin so that it is driven by the device */
static inline void gpio_configdev(uint32_t ioconfig, uint32_t bit)
{
uint32_t regaddr;
regaddr = ioconfig + LPC313X_IOCONFIG_MODE1RESET_OFFSET;
putreg32(bit, regaddr);
regaddr = ioconfig + LPC313X_IOCONFIG_MODE0SET_OFFSET;
putreg32(bit, regaddr);
}
/* Configure a pin as a low output */
static inline void gpio_outputlow(uint32_t ioconfig, uint32_t bit)
{
uint32_t regaddr;
regaddr = ioconfig + LPC313X_IOCONFIG_MODE1SET_OFFSET;
putreg32(bit, regaddr);
regaddr = ioconfig + LPC313X_IOCONFIG_MODE0RESET_OFFSET;
putreg32(bit, regaddr);
}
/* Configure a pin as a high output */
static inline void gpio_outputhigh(uint32_t ioconfig, uint32_t bit)
{
uint32_t regaddr;
regaddr = ioconfig + LPC313X_IOCONFIG_MODE1SET_OFFSET;
putreg32(bit, regaddr);
regaddr = ioconfig + LPC313X_IOCONFIG_MODE0SET_OFFSET;
putreg32(bit, regaddr);
}
/************************************************************************************
* Public Function Prototypes
************************************************************************************/
@ -103,50 +169,6 @@ EXTERN void lpc313x_lowsetup(void);
EXTERN void lpc313x_clockconfig(void);
/************************************************************************************
* Name: lpc313x_configgpio
*
* Description:
* Configure a GPIO pin based on bit-encoded description of the pin.
*
************************************************************************************/
EXTERN int lpc313x_configgpio(uint32_t cfgset);
/************************************************************************************
* Name: lpc313x_gpiowrite
*
* Description:
* Write one or zero to the selected GPIO pin
*
************************************************************************************/
EXTERN void lpc313x_gpiowrite(uint32_t pinset, bool value);
/************************************************************************************
* Name: lpc313x_gpioread
*
* Description:
* Read one or zero from the selected GPIO pin
*
************************************************************************************/
EXTERN bool lpc313x_gpioread(uint32_t pinset);
/************************************************************************************
* Function: lpc313x_dumpgpio
*
* Description:
* Dump all GPIO registers associated with the provided base address
*
************************************************************************************/
#ifdef CONFIG_DEBUG
EXTERN int lpc313x_dumpgpio(uint32_t pinset, const char *msg);
#else
# define lpc313x_dumpgpio(p,m)
#endif
/************************************************************************************
* Name: lpc313x_spiselect and lpc313x_spistatus
*