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Code Issues Releases Activity

PiOS: Make I2C return an error code for NACK

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This commit is contained in:
James Cotton 2011-11-19 00:11:16 -06:00
parent a7ef5601e0
commit da75e9fdaf
2 changed files with 4 additions and 0 deletions
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3
flight/PiOS/STM32F4xx/pios_i2c.c
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@ -592,6 +592,7 @@ static void go_w_last_txn_last(struct pios_i2c_adapter *i2c_adapter)
static void go_nack(struct pios_i2c_adapter *i2c_adapter)
{
i2c_adapter->nack = true;
I2C_ITConfig(i2c_adapter->cfg->regs, I2C_IT_EVT | I2C_IT_BUF | I2C_IT_ERR, DISABLE);
I2C_AcknowledgeConfig(i2c_adapter->cfg->regs, DISABLE);
I2C_GenerateSTOP(i2c_adapter->cfg->regs, ENABLE);
@ -994,6 +995,7 @@ int32_t PIOS_I2C_Transfer(uint32_t i2c_id, const struct pios_i2c_txn txn_list[],
i2c_adapter->callback = NULL;
i2c_adapter->bus_error = false;
i2c_adapter->nack = false;
i2c_adapter_inject_event(i2c_adapter, I2C_EVENT_START);
/* Wait for the transfer to complete */
@ -1024,6 +1026,7 @@ int32_t PIOS_I2C_Transfer(uint32_t i2c_id, const struct pios_i2c_txn txn_list[],
return !semaphore_success ? -2 :
i2c_adapter->bus_error ? -1 :
i2c_adapter->nack ? -3 :
0;
}

1
flight/PiOS/inc/pios_i2c_priv.h
View File

@ -94,6 +94,7 @@ struct pios_i2c_adapter {
#endif
bool bus_error;
bool nack;
volatile enum i2c_adapter_state curr_state;
const struct pios_i2c_txn *first_txn;