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HOTFIX: disable interrupt-driven I2C mode, configure pessimistic I2C timeout, correct handling of the NAK generation for I2C master reads.

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This looks like it addresses the recent I2C lockup issue, unfortunately it also increases CPU consumption by ~5% for the I2C sensor bus.
This commit is contained in:
px4dev
2013-01-18 00:43:57 -08:00
parent 7d7c352fb4
commit bc35bb23dd
4 changed files with 56 additions and 12 deletions
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apps/systemcmds/eeprom/24xxxx_mtd.c
+27
View File
@@ -163,6 +163,8 @@ static ssize_t at24c_bwrite(FAR struct mtd_dev_s *dev, off_t startblock,
size_t nblocks, FAR const uint8_t *buf);
static int at24c_ioctl(FAR struct mtd_dev_s *dev, int cmd, unsigned long arg);
void at24c_test(void);
/************************************************************************************
* Private Data
************************************************************************************/
@@ -218,6 +220,31 @@ static int at24c_erase(FAR struct mtd_dev_s *dev, off_t startblock, size_t nbloc
return (int)nblocks;
}
/************************************************************************************
* Name: at24c_test
************************************************************************************/
void at24c_test(void)
{
uint8_t buf[CONFIG_AT24XX_MTD_BLOCKSIZE];
unsigned count = 0;
unsigned errors = 0;
for (count = 0; count < 10000; count++) {
ssize_t result = at24c_bread(&g_at24c.mtd, 0, 1, buf);
if (result == ERROR) {
if (errors++ > 2) {
vdbg("too many errors\n");
return;
}
} else if (result != 1) {
vdbg("unexpected %u\n", result);
}
if ((count % 100) == 0)
vdbg("test %u errors %u\n", count, errors);
}
}
/************************************************************************************
* Name: at24c_bread
************************************************************************************/
apps/systemcmds/eeprom/eeprom.c
+13
View File
@@ -73,6 +73,7 @@ static void eeprom_erase(void);
static void eeprom_ioctl(unsigned operation);
static void eeprom_save(const char *name);
static void eeprom_load(const char *name);
static void eeprom_test(void);
static bool attached = false;
static bool started = false;
@@ -93,6 +94,9 @@ int eeprom_main(int argc, char *argv[])
if (!strcmp(argv[1], "erase"))
eeprom_erase();
if (!strcmp(argv[1], "test"))
eeprom_test();
if (0) { /* these actually require a file on the filesystem... */
if (!strcmp(argv[1], "reformat"))
@@ -250,3 +254,12 @@ eeprom_load(const char *name)
exit(0);
}
extern void at24c_test(void);
static void
eeprom_test(void)
{
at24c_test();
exit(0);
}