ARMmbed
/
mbed-os
mirror of https://github.com/ARMmbed/mbed-os.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity

STM I2C - move i2c_read in SYNC part 

just change the place of code to have i2c_read and i2c_write together
pull/3430/head
Laurent MEUNIER 2016-12-08 09:48:07 +01:00
parent 315d893e83
commit c0ca0a7e2c
1 changed files with 52 additions and 54 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

106
targets/TARGET_STM/i2c_api.c
View File

@ -442,60 +442,6 @@ i2c_t *get_i2c_obj(I2C_HandleTypeDef *hi2c){
return (obj);
}
/* SYNCHRONOUS API FUNCTIONS */
int i2c_read(i2c_t *obj, int address, char *data, int length, int stop) {
struct i2c_s *obj_s = I2C_S(obj);
I2C_HandleTypeDef *handle = &(obj_s->handle);
int count = 0, ret = 0;
uint32_t timeout = 0;
if ((obj_s->XferOperation == I2C_FIRST_AND_LAST_FRAME) ||
(obj_s->XferOperation == I2C_LAST_FRAME)) {
if (stop)
obj_s->XferOperation = I2C_FIRST_AND_LAST_FRAME;
else
obj_s->XferOperation = I2C_FIRST_FRAME;
} else if ((obj_s->XferOperation == I2C_FIRST_FRAME) ||
(obj_s->XferOperation == I2C_NEXT_FRAME)) {
if (stop)
obj_s->XferOperation = I2C_LAST_FRAME;
else
obj_s->XferOperation = I2C_NEXT_FRAME;
}
obj_s->event = 0;
/* Activate default IRQ handlers for sync mode
* which would be overwritten in async mode
*/
i2c_ev_err_enable(obj, i2c_get_irq_handler(obj));
ret = HAL_I2C_Master_Sequential_Receive_IT(handle, address, (uint8_t *) data, length, obj_s->XferOperation);
if(ret == HAL_OK) {
timeout = BYTE_TIMEOUT_US * length;
/* transfer started : wait completion or timeout */
while(!(obj_s->event & I2C_EVENT_ALL) && (--timeout != 0)) {
wait_us(1);
}
i2c_ev_err_disable(obj);
if((timeout == 0) || (obj_s->event != I2C_EVENT_TRANSFER_COMPLETE)) {
DEBUG_PRINTF(" TIMEOUT or error in i2c_read\r\n");
/* re-init IP to try and get back in a working state */
i2c_init(obj, obj_s->sda, obj_s->scl);
} else {
count = length;
}
} else {
DEBUG_PRINTF("ERROR in i2c_read\r\n");
}
return count;
}
/*
* UNITARY APIS.
* For very basic operations, direct registers access is needed
@ -685,6 +631,58 @@ void i2c_reset(i2c_t *obj) {
/*
* SYNC APIS
*/
int i2c_read(i2c_t *obj, int address, char *data, int length, int stop) {
struct i2c_s *obj_s = I2C_S(obj);
I2C_HandleTypeDef *handle = &(obj_s->handle);
int count = 0, ret = 0;
uint32_t timeout = 0;
if ((obj_s->XferOperation == I2C_FIRST_AND_LAST_FRAME) ||
(obj_s->XferOperation == I2C_LAST_FRAME)) {
if (stop)
obj_s->XferOperation = I2C_FIRST_AND_LAST_FRAME;
else
obj_s->XferOperation = I2C_FIRST_FRAME;
} else if ((obj_s->XferOperation == I2C_FIRST_FRAME) ||
(obj_s->XferOperation == I2C_NEXT_FRAME)) {
if (stop)
obj_s->XferOperation = I2C_LAST_FRAME;
else
obj_s->XferOperation = I2C_NEXT_FRAME;
}
obj_s->event = 0;
/* Activate default IRQ handlers for sync mode
* which would be overwritten in async mode
*/
i2c_ev_err_enable(obj, i2c_get_irq_handler(obj));
ret = HAL_I2C_Master_Sequential_Receive_IT(handle, address, (uint8_t *) data, length, obj_s->XferOperation);
if(ret == HAL_OK) {
timeout = BYTE_TIMEOUT_US * length;
/* transfer started : wait completion or timeout */
while(!(obj_s->event & I2C_EVENT_ALL) && (--timeout != 0)) {
wait_us(1);
}
i2c_ev_err_disable(obj);
if((timeout == 0) || (obj_s->event != I2C_EVENT_TRANSFER_COMPLETE)) {
DEBUG_PRINTF(" TIMEOUT or error in i2c_read\r\n");
/* re-init IP to try and get back in a working state */
i2c_init(obj, obj_s->sda, obj_s->scl);
} else {
count = length;
}
} else {
DEBUG_PRINTF("ERROR in i2c_read:%d\r\n", ret);
}
return count;
}
int i2c_write(i2c_t *obj, int address, const char *data, int length, int stop) {
struct i2c_s *obj_s = I2C_S(obj);
I2C_HandleTypeDef *handle = &(obj_s->handle);