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STM32: Remove i2c_read() and i2c_write() redirects to HAL_I2C_IsDeviceReady() 

Some I2C devices require specific zero length read/write sequences which
the HAL_I2C_IsDeviceReady() redirect interferes with.  After Removing
these redirects, it was confirmed that zero length reads and writes
would both still work correctly for detecting presence/absence of an
I2C device on a bus.
pull/4717/head
Bradley Scott 2017-07-05 14:02:34 -04:00
parent 1af8aef5dc
commit 251459e8aa
1 changed files with 0 additions and 14 deletions
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14
targets/TARGET_STM/i2c_api.c
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@ -743,13 +743,6 @@ int i2c_read(i2c_t *obj, int address, char *data, int length, int stop) {
int count = I2C_ERROR_BUS_BUSY, ret = 0;
uint32_t timeout = 0;
if((length == 0) || (data == 0)) {
if(HAL_I2C_IsDeviceReady(handle, address, 1, 10) == HAL_OK)
return 0;
else
return I2C_ERROR_BUS_BUSY;
}
if ((obj_s->XferOperation == I2C_FIRST_AND_LAST_FRAME) ||
(obj_s->XferOperation == I2C_LAST_FRAME)) {
if (stop)
@ -802,13 +795,6 @@ int i2c_write(i2c_t *obj, int address, const char *data, int length, int stop) {
int count = I2C_ERROR_BUS_BUSY, ret = 0;
uint32_t timeout = 0;
if((length == 0) || (data == 0)) {
if(HAL_I2C_IsDeviceReady(handle, address, 1, 10) == HAL_OK)
return 0;
else
return I2C_ERROR_BUS_BUSY;
}
if ((obj_s->XferOperation == I2C_FIRST_AND_LAST_FRAME) ||
(obj_s->XferOperation == I2C_LAST_FRAME)) {
if (stop)