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Add SD card support to the PIC32MX7 MMB board; Add regiser level debug instrumentatin for the PIC32 SPI driver

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git-svn-id: https://nuttx.svn.sourceforge.net/svnroot/nuttx/trunk@4797 7fd9a85b-ad96-42d3-883c-3090e2eb8679
This commit is contained in:
patacongo
2012-06-02 17:57:39 +00:00
parent e02ce9e19d
commit dc1b82ed5d
7 changed files with 200 additions and 50 deletions
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nuttx/arch/mips/src/pic32mx/pic32mx-spi.c
+84 -1
View File
@@ -72,6 +72,7 @@
#ifndef CONFIG_DEBUG
# undef CONFIG_DEBUG_SPI
# undef CONFIG_DEBUG_VERBOSE
# undef CONFIG_SPI_REGDEBUG
#endif
#ifdef CONFIG_DEBUG_SPI
@@ -309,13 +310,75 @@ static struct pic32mx_dev_s g_spi4dev =
*
****************************************************************************/
#ifdef CONFIG_SPI_REGDEBUG
static uint32_t spi_getreg(FAR struct pic32mx_dev_s *priv, unsigned int offset)
{
/* Last address, value, and count */
static uint32_t prevaddr = 0;
static uint32_t prevalue = 0;
static uint32_t count = 0;
/* New address and value */
uint32_t addr;
uint32_t value;
/* Read the value from the register */
addr = priv->base + offset;
value = getreg32(addr);
/* Is this the same value that we read from the same register last time?
* Are we polling the register? If so, suppress some of the output.
*/
if (addr == prevaddr && value == prevalue)
{
if (count == 0xffffffff || ++count > 3)
{
if (count == 4)
{
lldbg("...\n");
}
return value;
}
}
/* No this is a new address or value */
else
{
/* Did we print "..." for the previous value? */
if (count > 3)
{
/* Yes.. then show how many times the value repeated */
lldbg("[repeats %d more times]\n", count-3);
}
/* Save the new address, value, and count */
prevaddr = addr;
prevalue = value;
count = 1;
}
/* Show the register value read */
lldbg("%08x->%08x\n", addr, value);
return value;
}
#else
static uint32_t spi_getreg(FAR struct pic32mx_dev_s *priv, unsigned int offset)
{
return getreg32(priv->base + offset);
}
#endif
/****************************************************************************
* Name: spi_getreg
* Name: spi_putreg
*
* Description:
* Write a value to one, 32-bit SPI register
@@ -330,11 +393,31 @@ static uint32_t spi_getreg(FAR struct pic32mx_dev_s *priv, unsigned int offset)
*
****************************************************************************/
#ifdef CONFIG_SPI_REGDEBUG
static void spi_putreg(FAR struct pic32mx_dev_s *priv, unsigned int offset,
uint32_t value)
{
uint32_t addr;
/* Get the address to write to */
addr = priv->base + offset;
/* Show the register value being written */
lldbg("%08x<-%08x\n", addr, value);
/* Then do the write */
putreg32(value, addr);
}
#else
static void spi_putreg(FAR struct pic32mx_dev_s *priv, unsigned int offset,
uint32_t value)
{
putreg32(value, priv->base + offset);
}
#endif
/****************************************************************************
* Name: spi_lock