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Updated README and comments

This commit is contained in:
Gregory Nutt 2014-05-10 11:36:20 -06:00
parent 3e75c2da3a
commit c5614e5b45
2 changed files with 20 additions and 9 deletions
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18
nuttx/arch/arm/src/stm32/stm32_i2c.c
View File

@ -1125,6 +1125,7 @@ static inline uint32_t stm32_i2c_disablefsmc(FAR struct stm32_i2c_priv_s *priv)
regval = ret & ~RCC_AHBENR_FSMCEN;
putreg32(regval, STM32_RCC_AHBENR);
}
return ret;
}
@ -1581,7 +1582,8 @@ static int stm32_i2c_setaddress(FAR struct i2c_dev_s *dev, int addr, int nbits)
*
************************************************************************************/
static int stm32_i2c_process(FAR struct i2c_dev_s *dev, FAR struct i2c_msg_s *msgs, int count)
static int stm32_i2c_process(FAR struct i2c_dev_s *dev, FAR struct i2c_msg_s *msgs,
int count)
{
struct stm32_i2c_inst_s *inst = (struct stm32_i2c_inst_s *)dev;
FAR struct stm32_i2c_priv_s *priv = inst->priv;
@ -1828,14 +1830,14 @@ static int stm32_i2c_writeread(FAR struct i2c_dev_s *dev,
const uint8_t *wbuffer, int wbuflen,
uint8_t *buffer, int buflen)
{
stm32_i2c_sem_wait(dev); /* ensure that address or flags don't change meanwhile */
stm32_i2c_sem_wait(dev); /* Ensure that address or flags don't change meanwhile */
struct i2c_msg_s msgv[2] =
{
{
.addr = ((struct stm32_i2c_inst_s *)dev)->address,
.flags = ((struct stm32_i2c_inst_s *)dev)->flags,
.buffer = (uint8_t *)wbuffer, /* this is really ugly, sorry const ... */
.buffer = (uint8_t *)wbuffer, /* This is really ugly, sorry const ... */
.length = wbuflen
},
{
@ -1862,7 +1864,7 @@ static int stm32_i2c_writeread(FAR struct i2c_dev_s *dev,
static int stm32_i2c_transfer(FAR struct i2c_dev_s *dev, FAR struct i2c_msg_s *msgs,
int count)
{
stm32_i2c_sem_wait(dev); /* ensure that address or flags don't change meanwhile */
stm32_i2c_sem_wait(dev); /* Ensure that address or flags don't change meanwhile */
return stm32_i2c_process(dev, msgs, count);
}
#endif
@ -1881,8 +1883,8 @@ static int stm32_i2c_transfer(FAR struct i2c_dev_s *dev, FAR struct i2c_msg_s *m
FAR struct i2c_dev_s *up_i2cinitialize(int port)
{
struct stm32_i2c_priv_s * priv = NULL; /* private data of device with multiple instances */
struct stm32_i2c_inst_s * inst = NULL; /* device, single instance */
struct stm32_i2c_priv_s * priv = NULL; /* Private data of device with multiple instances */
struct stm32_i2c_inst_s * inst = NULL; /* Eevice, single instance */
int irqs;
#if STM32_PCLK1_FREQUENCY < 4000000
@ -1932,7 +1934,7 @@ FAR struct i2c_dev_s *up_i2cinitialize(int port)
inst->address = 0;
inst->flags = 0;
/* Init private data for the first time, increment refs count,
/* Initialize private data for the first time, increment reference count,
* power-up hardware and configure GPIOs.
*/
@ -1962,7 +1964,7 @@ int up_i2cuninitialize(FAR struct i2c_dev_s * dev)
ASSERT(dev);
/* Decrement refs and check for underflow */
/* Decrement reference count and check for underflow */
if (((struct stm32_i2c_inst_s *)dev)->priv->refs == 0)
{

11
nuttx/binfmt/libpcode/README.txt
View File

@ -150,7 +150,16 @@ The general idea to fix both of these problems is as follows:
on the command line. This might be accomplished by simply modifying the
argv[] structure in the struct binary_s instance.
The current start-up logic in binfmt_execmodule.c would have modified to
handle this special start-up. Perhaps the struct binfmt_s could be
extended to include an exec() method that provides custom start up logic?
4. Add a task start hook to the program. Here is where we can setup up the
on_exit() function that will clean up after the P-Code program terminates.
There are many other smaller issues to be resolved, but those are the main ones.
There are many other smaller issues to be resolved, but those are the main
ones.
A more complex solution might include a user-space p-code daemon that
receives the P-Code path in a POSIX message and starts a P-Code interpreter
thread wholly in user space.