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feat(i2c): update i2c driver for esp32s2beta

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chenjianqiang
2019-06-14 16:15:45 +08:00
parent 6410f7a259
commit 667113cf94
6 changed files with 181 additions and 133 deletions
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examples/peripherals/i2c/i2c_self_test/README.md
+5 -5
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@@ -24,19 +24,19 @@ To run this example, you should have one ESP32 dev board (e.g. ESP32-WROVER Kit)
| | SDA | SCL |
| ---------------- | ------ | ------ |
| ESP32 I2C Master | GPIO18 | GPIO19 |
| ESP32 I2C Slave | GPIO25 | GPIO26 |
| ESP32 I2C Slave | GPIO4 | GPIO5 |
| BH1750 Sensor | SDA | SCL |
- slave:
- GPIO25 is assigned as the data signal of I2C slave port
- GPIO26 is assigned as the clock signal of I2C slave port
- GPIO4 is assigned as the data signal of I2C slave port
- GPIO5 is assigned as the clock signal of I2C slave port
- master:
- GPIO18 is assigned as the data signal of I2C master port
- GPIO19 is assigned as the clock signal of I2C master port
- Connection:
- connect GPIO18 with GPIO25
- connect GPIO19 with GPIO26
- connect GPIO18 with GPIO4
- connect GPIO19 with GPIO5
- connect SDA/SCL of BH1750 sensor with GPIO18/GPIO19
**Note: ** There’s no need to add an external pull-up resistors for SDA/SCL pin, because the driver will enable the internal pull-up resistors.
examples/peripherals/i2c/i2c_self_test/main/Kconfig.projbuild
+2 -2
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@@ -29,13 +29,13 @@ menu "Example Configuration"
menu "I2C Slave"
config I2C_SLAVE_SCL
int "SCL GPIO Num"
default 26
default 5
help
GPIO number for I2C Slave clock line.
config I2C_SLAVE_SDA
int "SDA GPIO Num"
default 25
default 4
help
GPIO number for I2C Slave data line.