Locate defined pins in a proyect

RE: Locate defined pins in a proyect

Sigurd — Wed, 15 Jul 2020 14:31:58 GMT

[quote user="lavande"]What should I do to nrf_gpio_cfg of VDD PIN?[/quote]

Use an available GPIO pin from the nRF52 as "VDD Pin". In the 3rd party driver code linked to in this case, pin 2 is used as VDD. Looking at the datasheet for SSD1306(https://cdn-shop.adafruit.com/datasheets/SSD1306.pdf), VDD is "Power supply pin for core logic operation".

RE: Locate defined pins in a proyect

lavande — Mon, 13 Jul 2020 03:46:49 GMT

SigurdHi Sigurd, Our VDD ping is connect to VCC_3.3 and cannot be controlled. What should I do to nrf_gpio_cfg of VDD PIN?

If I remove it , the screen cant light on.

The following is the sample code.

nrf_gpio_cfg(
SSD1306_CONFIG_VDD_PIN,
NRF_GPIO_PIN_DIR_OUTPUT,
NRF_GPIO_PIN_INPUT_DISCONNECT,
NRF_GPIO_PIN_NOPULL,
NRF_GPIO_PIN_H0S1,
NRF_GPIO_PIN_NOSENSE);

nrf_gpio_pin_set(SSD1306_CONFIG_VDD_PIN);

//ssd1306_init_i2c(SSD1306_CONFIG_SCL_PIN, SSD1306_CONFIG_SDA_PIN);
//ssd1306_begin(SSD1306_SWITCHCAPVCC, SSD1306_I2C_ADDRESS, false);

RE: Locate defined pins in a proyect

lavande — Fri, 10 Jul 2020 03:08:53 GMT

SigurdHi Sigurd, Our VDD ping is connect to VCC_3.3 and cannot be controlled. What should I do to nrf_gpio_cfg of VDD PIN?

If I remove it , the screen cant light on.

The following is the sample code.

nrf_gpio_cfg(
SSD1306_CONFIG_VDD_PIN,
NRF_GPIO_PIN_DIR_OUTPUT,
NRF_GPIO_PIN_INPUT_DISCONNECT,
NRF_GPIO_PIN_NOPULL,
NRF_GPIO_PIN_H0S1,
NRF_GPIO_PIN_NOSENSE);

nrf_gpio_pin_set(SSD1306_CONFIG_VDD_PIN);

//ssd1306_init_i2c(SSD1306_CONFIG_SCL_PIN, SSD1306_CONFIG_SDA_PIN);
//ssd1306_begin(SSD1306_SWITCHCAPVCC, SSD1306_I2C_ADDRESS, false);

RE: Locate defined pins in a proyect

Sigurd — Mon, 15 May 2017 07:46:54 GMT

Depends on if you want to use I2C(TWI) or SPI. In the code you linked to i2c is used by default, and then I believe you only need to connect SCL(SSD1306_CONFIG_SCL_PIN), SDA(SSD1306_CONFIG_SDA_PIN), VDD and ground

RE: Locate defined pins in a proyect

JuanjoAlm — Fri, 12 May 2017 16:40:20 GMT

But I only have this pins in my display: cdn-learn.adafruit.com/guides... Then i cant see in main.c the next pins: Data, 3v3, Vin and GND. For example, I should connect CLK pin to kit's pin number 23? Thanks mate!

RE: Locate defined pins in a proyect

JuanjoAlm — Fri, 12 May 2017 16:32:36 GMT

But I only have this pins in my display:

cdn-learn.adafruit.com/.../DSC00469_copy.jpg

Then i cant see in main.c the next pins:

Data, 3v3, Vin and GND.

For example, I should connect CLK pin to kit's pin number 23?

Thanks mate!

RE: Locate defined pins in a proyect

Sigurd — Fri, 12 May 2017 16:17:30 GMT

Hi,

From the main.c we have the following defines for the display:

#define SSD1306_CONFIG_VDD_PIN      2
#define SSD1306_CONFIG_CLK_PIN      23
#define SSD1306_CONFIG_MOSI_PIN     24
#define SSD1306_CONFIG_CS_PIN       22
#define SSD1306_CONFIG_DC_PIN       20
#define SSD1306_CONFIG_RST_PIN      19

#define SSD1306_CONFIG_SCL_PIN      27
#define SSD1306_CONFIG_SDA_PIN      26