Hi,
I am running the standard Grove LCD code, as below but am getting an error, "Grove LCD: Device not ready.'
the code is
/*
* Copyright (c) 2012-2014 Wind River Systems, Inc.
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <zephyr.h>
#include <device.h>
//#include <display/cfb.h>
#include <stdio.h>
#include <drivers/display.h>
#include <nrf-pinctrl.h>
#include <drivers/i2c.h>
#include <sys/printk.h>
#include <zephyr/drivers/sensor.h>
#include <zephyr/sys/printk.h>
#include <zephyr/sys/util.h>
#include <drivers/misc/grove_lcd/grove_lcd.h>
#include <string.h>
/**
* @file Display a counter through I2C and Grove LCD.
*/
/* sleep time in msec */
#define SLEEPTIME 100
uint8_t clamp_rgb(int val)
{
if (val > 255) {
return 255;
} else if (val < 0) {
return 0;
} else {
return val;
}
}
void main(void)
{
const struct device *glcd = DEVICE_DT_GET(DT_NODELABEL(glcd));
char str[20];
int rgb[] = { 0x0, 0x0, 0x0 };
uint8_t rgb_chg[3];
const uint8_t rgb_step = 16U;
uint8_t set_config;
int i, j, m;
int cnt;
if (!device_is_ready(glcd)) {
printk("Grove LCD: Device not ready.\n");
return;
}
/* Now configure the LCD the way we want it */
set_config = GLCD_FS_ROWS_2
| GLCD_FS_DOT_SIZE_LITTLE
| GLCD_FS_8BIT_MODE;
glcd_function_set(glcd, set_config);
set_config = GLCD_DS_DISPLAY_ON | GLCD_DS_CURSOR_ON | GLCD_DS_BLINK_ON;
glcd_display_state_set(glcd, set_config);
/* Setup variables /*/
for (i = 0; i < sizeof(str); i++) {
str[i] = '\0';
}
/* Starting counting */
cnt = 0;
while (1) {
glcd_cursor_pos_set(glcd, 0, 0);
/* RGB values are from 0 - 511.
* First half means incrementally brighter.
* Second half is opposite (i.e. goes darker).
*/
/* Update the RGB values for backlight */
m = (rgb[2] > 255) ? (512 - rgb[2]) : (rgb[2]);
rgb_chg[2] = clamp_rgb(m);
m = (rgb[1] > 255) ? (512 - rgb[1]) : (rgb[1]);
rgb_chg[1] = clamp_rgb(m);
m = (rgb[0] > 255) ? (512 - rgb[0]) : (rgb[0]);
rgb_chg[0] = clamp_rgb(m);
glcd_color_set(glcd, rgb_chg[0], rgb_chg[1], rgb_chg[2]);
/* Display the counter
*
* well... sprintf() might be easier,
* but this is more fun.
*/
m = cnt;
i = 1000000000;
j = 0;
while (i > 0) {
str[j] = '0' + (m / i);
m = m % i;
i = i / 10;
j++;
}
cnt++;
glcd_print(glcd, str, j);
/* Rotate RGB values */
rgb[2] += rgb_step;
if (rgb[2] > 511) {
rgb[2] = 0;
rgb[1] += rgb_step;
}
if (rgb[1] > 511) {
rgb[1] = 0;
rgb[0] += rgb_step;
}
if (rgb[0] > 511) {
rgb[0] = 0;
}
/* wait a while */
k_msleep(SLEEPTIME);
}
}
my overlay file is
/ {
chosen {
zephyr,display = &glcd;
};
};
&pinctrl {
uart0_default_alt: uart0_default_alt {
group0 {
psels = <NRF_PSEL(UART_TX, 0, 24)>, <NRF_PSEL(UART_RX, 0, 22)>;
};
};
uart0_sleep_alt: uart0_sleep_alt {
group1 {
psels = <NRF_PSEL(UART_TX, 0, 24)>, <NRF_PSEL(UART_RX, 0, 22)>;
low-power-enable;
};
};
i2c0_default_alt: i2c0_default_alt {
group2 {
psels = <NRF_PSEL(TWIM_SDA, 0, 17)>,
<NRF_PSEL(TWIM_SCL, 0, 20)>;
};
};
};
&uart0 {
pinctrl-0 = <&uart0_default_alt>;
pinctrl-1 = <&uart0_sleep_alt>;
pinctrl-names = "default", "sleep";
compatible = "nordic,nrf-uart";
current-speed = <115200>;
status = "okay";
};
&i2c0 {
status = "okay";
compatible = "nordic,nrf-twim";
pinctrl-0 = <&i2c0_default>;
pinctrl-1 = <&i2c0_sleep>;
pinctrl-names = "default", "sleep";
clock-frequency = <I2C_BITRATE_STANDARD>;
// clock-frequency = <I2C_BITRATE_FAST>;
zephyr,concat-buf-size = <520>;
glcd: glcd@3e {
compatible = "seeed,grove-lcd-rgb";
label = "GLCD";
reg = <0x3e>;
};
};
&i2c0 {
/delete-property/sda-gpios;
/delete-property/scl-gpios;
};
and my proj file
# General config
CONFIG_BOARD_HAS_NRF5_BOOTLOADER=n
CONFIG_ASSERT=y
CONFIG_TEST_RANDOM_GENERATOR=y
CONFIG_GPIO=y
CONFIG_SERIAL=y
CONFIG_UART_INTERRUPT_DRIVEN=y
CONFIG_TEST_RANDOM_GENERATOR=y
CONFIG_NEWLIB_LIBC=y
CONFIG_CONSOLE_SUBSYS=y
CONFIG_CONSOLE_GETCHAR=y
CONFIG_STDOUT_CONSOLE=y
CONFIG_CONSOLE=y
CONFIG_CPLUSPLUS=y
CONFIG_LOG=y
CONFIG_SHELL=y
CONFIG_REBOOT=y
CONFIG_NEWLIB_LIBC_FLOAT_PRINTF=y
CONFIG_UART_CONSOLE=y
CONFIG_GPIO=y
CONFIG_STDOUT_CONSOLE=y
CONFIG_PRINTK=y
CONFIG_PINCTRL=y
CONFIG_PM_DEVICE=y
CONFIG_I2C=y
CONFIG_I2C_NRFX=y
CONFIG_SENSOR=y
CONFIG_BOOT_BANNER=n
#Display
CONFIG_DISPLAY=y
CONFIG_CHARACTER_FRAMEBUFFER=y
CONFIG_SHELL=y
CONFIG_CHARACTER_FRAMEBUFFER_SHELL=y
CONFIG_HEAP_MEM_POOL_SIZE=16384
CONFIG_GROVE_LCD_RGB=y
I think I'm missing something obvious but can't see it :-(
Rod
