alex/esp-idf-ssd1306
1
0
Fork 0
mirror of https://github.com/nopnop2002/esp-idf-ssd1306.git synced 2024-09-19 09:45:59 -04:00
Code Issues Actions Packages Projects Releases Wiki Activity

Update README.md

Browse Source
This commit is contained in:
nopnop2002 2024-09-09 11:21:26 +09:00
parent 1bf91080a0
commit 9f4ad56286
1 changed files with 4 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
DeviceAddDemo/README.md
View File

@ -9,8 +9,7 @@ If you want to use SSD1306 and other i2c/spi devices at the same time, please fo
# Using i2c interface
### Case 1
Use multiple i2c devices on one i2c bus.
### Use multiple i2c devices on one i2c bus.
SCL and SDA are shared by all devices.
```
I2C_NUM_0 --+-- I2C SSD1306
@ -100,8 +99,6 @@ We need to run this code on the second device.
SSD1306 and other device can use different frequencies.
```
// We need to load bus_handle from somewhere.
i2c_device_config_t dev_cfg = {
.dev_addr_length = I2C_ADDR_BIT_LEN_7,
.device_address = I2C_ADDRESS2,
@ -142,8 +139,7 @@ The i2c driver must be installed before using this initialization function.
---
### Case 2
Use multiple i2c devices on two i2c bus.
### Use multiple i2c devices on two i2c bus.
SCL and SDA each use separate GPIOs.
Install the i2c master driver for each of I2C_NUM_0 and I2C_NUM_1.
The frequencies of I2C_NUM_0 and I2C_NUM_1 can be set completely independently.
@ -180,8 +176,7 @@ Can only be used with XTENSA series.
# Using spi interface
### Case 1
Use multiple spi devices on one spi bus.
### Use multiple spi devices on one spi bus.
MOSI and SCLK are shared by all devices.
```
SPI2_HOST --+-- SPI SSD1306
@ -243,8 +238,7 @@ The spi driver must be installed before using this initialization function.
spi_device_add(&dev, CONFIG_CS_GPIO, CONFIG_DC_GPIO, CONFIG_RESET_GPIO);
```
### Case 2
Use multiple spi devices on two spi bus.
### Use multiple spi devices on two spi bus.
MOSI and SCLK each use separate GPIOs.
Install the spi master driver for each of SPI2_HOST and SPI3_HOST.
```