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I2C: const correctness, checking SDA/SCL GPIOs

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* const correctness in i2c_slave_write_buffer()
* i2c_set_pin() additionally checks whether
  SDA and SCL pins are the same number
This commit is contained in:
Jakob Hasse 2020-02-12 16:38:31 +01:00 committed by StrawHat
parent c65b67115a
commit d230d44e2d
3 changed files with 12 additions and 4 deletions
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8
components/driver/i2c.c
View file

@ -61,6 +61,7 @@ static const char* I2C_TAG = "i2c";
#define I2C_MODE_ERR_STR "i2c mode error"
#define I2C_SDA_IO_ERR_STR "sda gpio number error"
#define I2C_SCL_IO_ERR_STR "scl gpio number error"
#define I2C_SCL_SDA_EQUAL_ERR_STR "scl and sda gpio numbers are the same"
#define I2C_CMD_LINK_INIT_ERR_STR "i2c command link error"
#define I2C_GPIO_PULLUP_ERR_STR "this i2c pin does not support internal pull-up"
#define I2C_ACK_TYPE_ERR_STR "i2c ack type error"
@ -440,7 +441,7 @@ static void IRAM_ATTR i2c_isr_handler_default(void *arg)
i2c_master_cmd_begin_static(i2c_num);
} else if(evt_type == I2C_INTR_EVENT_TOUT) {
p_i2c_obj[i2c_num]->status = I2C_STATUS_TIMEOUT;
i2c_master_cmd_begin_static(i2c_num);
i2c_master_cmd_begin_static(i2c_num);
} else if (evt_type == I2C_INTR_EVENT_ARBIT_LOST) {
p_i2c_obj[i2c_num]->status = I2C_STATUS_TIMEOUT;
i2c_master_cmd_begin_static(i2c_num);
@ -766,6 +767,7 @@ esp_err_t i2c_set_pin(i2c_port_t i2c_num, int sda_io_num, int scl_io_num, bool s
I2C_CHECK(scl_io_num < 0 ||
(scl_pullup_en == GPIO_PULLUP_ENABLE && GPIO_IS_VALID_OUTPUT_GPIO(scl_io_num)) ||
scl_pullup_en == GPIO_PULLUP_DISABLE, I2C_GPIO_PULLUP_ERR_STR, ESP_ERR_INVALID_ARG);
I2C_CHECK((sda_io_num != scl_io_num), I2C_SCL_SDA_EQUAL_ERR_STR, ESP_ERR_INVALID_ARG);
int sda_in_sig, sda_out_sig, scl_in_sig, scl_out_sig;
sda_out_sig = i2c_periph_signal[i2c_num].sda_out_sig;
@ -1022,7 +1024,7 @@ static void IRAM_ATTR i2c_master_cmd_begin_static(i2c_port_t i2c_num)
return;
} else if (p_i2c->status == I2C_STATUS_DONE) {
return;
}
}
if (p_i2c->cmd_link.head == NULL) {
p_i2c->cmd_link.cur = NULL;
@ -1211,7 +1213,7 @@ esp_err_t i2c_master_cmd_begin(i2c_port_t i2c_num, i2c_cmd_handle_t cmd_handle,
return ret;
}
int i2c_slave_write_buffer(i2c_port_t i2c_num, uint8_t* data, int size, TickType_t ticks_to_wait)
int i2c_slave_write_buffer(i2c_port_t i2c_num, const uint8_t* data, int size, TickType_t ticks_to_wait)
{
I2C_CHECK(( i2c_num < I2C_NUM_MAX ), I2C_NUM_ERROR_STR, ESP_FAIL);
I2C_CHECK(p_i2c_obj[i2c_num] != NULL, I2C_DRIVER_ERR_STR, ESP_FAIL);

2
components/driver/include/driver/i2c.h
View file

@ -315,7 +315,7 @@ esp_err_t i2c_master_cmd_begin(i2c_port_t i2c_num, i2c_cmd_handle_t cmd_handle,
* - ESP_FAIL(-1) Parameter error
* - Others(>=0) The number of data bytes that pushed to the I2C slave buffer.
*/
int i2c_slave_write_buffer(i2c_port_t i2c_num, uint8_t* data, int size, TickType_t ticks_to_wait);
int i2c_slave_write_buffer(i2c_port_t i2c_num, const uint8_t* data, int size, TickType_t ticks_to_wait);
/**
* @brief I2C slave read data from internal buffer. When I2C slave receive data, isr will copy received data

6
components/driver/test/test_i2c.c
View file

@ -91,6 +91,12 @@ static i2c_config_t i2c_slave_init(void)
return conf_slave;
}
TEST_CASE("I2C i2c_set_pin() fails if sda and scl gpios are same", "[i2c]")
{
// master test
TEST_ASSERT_EQUAL(ESP_ERR_INVALID_ARG, i2c_set_pin(0, 0, 0, true, true , I2C_MODE_SLAVE));
}
TEST_CASE("I2C config test", "[i2c]")
{
// master test