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Fix bug of not being able to send a single Byte with i2c_master_write

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Signed-off-by: XiongYu <xiongyu@espressif.com>

Merges https://github.com/espressif/ESP8266_RTOS_SDK/pull/343
This commit is contained in:
Benjamin Marty
2018-10-16 18:43:39 +00:00
committed by XiongYu
parent 8f42cd7451
commit 05ff1226e7
1 changed files with 2 additions and 2 deletions
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4
components/esp8266/driver/i2c.c
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@ -500,7 +500,7 @@ static void i2c_master_cmd_begin_static(i2c_port_t i2c_num)
i2c_master_set_dc(i2c_num, i2c_last_state[i2c_num]->sda, 0);
for (i = 7; i >= 0; i--) {
if (cmd->byte_num == 1) {
if (cmd->byte_num == 1 && cmd->data == NULL) {
dat = (cmd->byte_cmd) >> i;
} else {
dat = ((uint8_t) * (cmd->data + len)) >> i;
@ -615,4 +615,4 @@ esp_err_t i2c_master_cmd_begin(i2c_port_t i2c_num, i2c_cmd_handle_t cmd_handle,
return ESP_FAIL;
}
}
}