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drivers: i2c: stm32 I2C V2 handles i2c_target processed_cb return code

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Check the return code of the i2c_target_read/write callback function
is 0 before continuing the transmit/receive operation on I2C target
When Transmitting: 0 if data has been provided, then continue
When address matches: 0 if the write is accepted or
if more data can be requested depending on the transfer direction.

Signed-off-by: Francois Ramu <francois.ramu@st.com>
This commit is contained in:
Francois Ramu 2024-11-06 13:34:59 +01:00 committed by Mahesh Mahadevan
parent fe56ce5a1c
commit c7cbe91760
1 changed files with 16 additions and 7 deletions
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23
drivers/i2c/i2c_ll_stm32_v2.c
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@ -254,8 +254,11 @@ static void stm32_i2c_slave_event(const struct device *dev)
if (LL_I2C_IsActiveFlag_TXIS(i2c)) {
uint8_t val;
slave_cb->read_processed(slave_cfg, &val);
LL_I2C_TransmitData8(i2c, val);
if (slave_cb->read_processed(slave_cfg, &val) < 0) {
LOG_ERR("Error continuing reading");
} else {
LL_I2C_TransmitData8(i2c, val);
}
return;
}
@ -293,14 +296,20 @@ static void stm32_i2c_slave_event(const struct device *dev)
dir = LL_I2C_GetTransferDirection(i2c);
if (dir == LL_I2C_DIRECTION_WRITE) {
slave_cb->write_requested(slave_cfg);
LL_I2C_EnableIT_RX(i2c);
if (slave_cb->write_requested(slave_cfg) < 0) {
LOG_ERR("Error initiating writing");
} else {
LL_I2C_EnableIT_RX(i2c);
}
} else {
uint8_t val;
slave_cb->read_requested(slave_cfg, &val);
LL_I2C_TransmitData8(i2c, val);
LL_I2C_EnableIT_TX(i2c);
if (slave_cb->read_requested(slave_cfg, &val) < 0) {
LOG_ERR("Error initiating reading");
} else {
LL_I2C_TransmitData8(i2c, val);
LL_I2C_EnableIT_TX(i2c);
}
}
stm32_i2c_enable_transfer_interrupts(dev);