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Imported u8g2 library and added example to main

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Removed old display library code
This commit is contained in:
Christian Loch 2020-02-10 19:14:18 +01:00
parent b12deb401c
commit 6f7940a443
5 changed files with 304 additions and 353 deletions
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1
components/u8g2 Submodule

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Subproject commit 12ed2e48354566216bfeee77449fc7ea41e5df2c

2
main/CMakeLists.txt
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set(COMPONENT_REQUIRES ) set(COMPONENT_REQUIRES )
set(COMPONENT_PRIV_REQUIRES ) set(COMPONENT_PRIV_REQUIRES )
set(COMPONENT_SRCS "main.c") set(COMPONENT_SRCS "main.c" "u8g2_esp32_hal.c")
set(COMPONENT_ADD_INCLUDEDIRS "") set(COMPONENT_ADD_INCLUDEDIRS "")
register_component() register_component()

437
main/main.c
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#include "freertos/FreeRTOS.h" //#include "freertos/FreeRTOS.h"
#include "esp_wifi.h" //#include "esp_wifi.h"
#include "esp_system.h" //#include "esp_system.h"
#include "esp_event.h" //#include "esp_event.h"
#include "esp_event_loop.h" //#include "esp_event_loop.h"
#include "nvs_flash.h" //#include "nvs_flash.h"
#include "driver/gpio.h" //#include "driver/gpio.h"
#include "bme280.h" #include "bme280.h"
//#include "ssd1366.h"
#include "driver/i2c.h" #include "driver/i2c.h"
#include <u8g2.h>
#include "u8g2_esp32_hal.h"
#include <esp_log.h>
#define I2C_MASTER_TX_BUF_DISABLE 0 /*!< I2C master doesn't need buffer */ void i2c_setup()
#define I2C_MASTER_RX_BUF_DISABLE 0 /*!< I2C master doesn't need buffer */
#define WRITE_BIT I2C_MASTER_WRITE /*!< I2C master write */
#define READ_BIT I2C_MASTER_READ /*!< I2C master read */
#define ACK_CHECK_EN 0x1 /*!< I2C master will check ack from slave*/
#define ACK_CHECK_DIS 0x0 /*!< I2C master will not check ack from slave */
#define ACK_VAL 0x0 /*!< I2C ack value */
#define NACK_VAL 0x1 /*!< I2C nack value */
static struct {
struct arg_int *port;
struct arg_int *freq;
struct arg_int *sda;
struct arg_int *scl;
struct arg_end *end;
} i2cconfig_args;
static struct {
struct arg_int *chip_address;
struct arg_int *register_address;
struct arg_int *data_length;
struct arg_end *end;
} i2cget_args;
static struct {
struct arg_int *chip_address;
struct arg_int *register_address;
struct arg_int *data;
struct arg_end *end;
} i2cset_args;
static int do_i2cget_cmd(int argc, char **argv)
{ {
int nerrors = arg_parse(argc, argv, (void **)&i2cget_args); printf("Setting up I²C driver... ");
if (nerrors != 0) { //i2c_driver_install(0, I2C_MODE_MASTER, 0, 0, 0);
arg_print_errors(stderr, i2cget_args.end, argv[0]); i2c_config_t config;
return 0; config.mode = I2C_MODE_MASTER;
} config.sda_io_num = 18;
config.sda_pullup_en = GPIO_PULLUP_ENABLE;
config.scl_io_num = 19;
config.scl_pullup_en = GPIO_PULLUP_ENABLE;
config.master.clk_speed = 100000;
i2c_param_config(I2C_NUM_0, &config);
printf("Set driver parameters... ");
esp_err_t err = i2c_driver_install(I2C_NUM_0, I2C_MODE_MASTER, 0, 0, 0);
if (err == ESP_OK)
printf("Driver installed!\n");
else if (err == ESP_ERR_INVALID_ARG)
printf("Driver install failed, invalid arguments!\n");
else
printf("Driver install failed!\n");
}
/* Check chip address: "-c" option */ void i2c_detect()
int chip_addr = i2cget_args.chip_address->ival[0]; {
/* Check register address: "-r" option */ printf("Scanning I²C bus:\n");
int data_addr = -1; uint8_t address;
if (i2cget_args.register_address->count) { printf(" 0 1 2 3 4 5 6 7 8 9 a b c d e f\r\n");
data_addr = i2cget_args.register_address->ival[0]; for (int i = 0; i < 128; i += 16) {
} printf("%02x: ", i);
/* Check data length: "-l" option */ for (int j = 0; j < 16; j++) {
int len = 1; fflush(stdout);
if (i2cget_args.data_length->count) { address = i + j;
len = i2cget_args.data_length->ival[0];
}
uint8_t *data = malloc(len);
i2c_master_driver_initialize();
i2c_driver_install(i2c_port, I2C_MODE_MASTER, I2C_MASTER_RX_BUF_DISABLE, I2C_MASTER_TX_BUF_DISABLE, 0);
i2c_cmd_handle_t cmd = i2c_cmd_link_create(); i2c_cmd_handle_t cmd = i2c_cmd_link_create();
i2c_master_start(cmd); i2c_master_start(cmd);
if (data_addr != -1) { i2c_master_write_byte(cmd, (address << 1) | I2C_MASTER_WRITE, 0x1);
i2c_master_write_byte(cmd, chip_addr << 1 | WRITE_BIT, ACK_CHECK_EN);
i2c_master_write_byte(cmd, data_addr, ACK_CHECK_EN);
i2c_master_start(cmd);
}
i2c_master_write_byte(cmd, chip_addr << 1 | READ_BIT, ACK_CHECK_EN);
if (len > 1) {
i2c_master_read(cmd, data, len - 1, ACK_VAL);
}
i2c_master_read_byte(cmd, data + len - 1, NACK_VAL);
i2c_master_stop(cmd); i2c_master_stop(cmd);
esp_err_t ret = i2c_master_cmd_begin(i2c_port, cmd, 1000 / portTICK_RATE_MS); esp_err_t ret = i2c_master_cmd_begin(I2C_NUM_0, cmd, 50 / portTICK_RATE_MS);
i2c_cmd_link_delete(cmd); i2c_cmd_link_delete(cmd);
if (ret == ESP_OK) { if (ret == ESP_OK) {
for (int i = 0; i < len; i++) { printf("%02x ", address);
printf("0x%02x ", data[i]); } else if (ret == ESP_ERR_TIMEOUT) {
if ((i + 1) % 16 == 0) { printf("UU ");
} else {
printf("-- ");
}
}
printf("\r\n"); printf("\r\n");
} }
}
if (len % 16) {
printf("\r\n");
}
} else if (ret == ESP_ERR_TIMEOUT) {
ESP_LOGW(TAG, "Bus is busy");
} else {
ESP_LOGW(TAG, "Read failed");
}
free(data);
i2c_driver_delete(i2c_port);
return 0;
} }
static int do_i2cset_cmd(int argc, char **argv) void i2c_shutdown()
{ {
int nerrors = arg_parse(argc, argv, (void **)&i2cset_args); printf("Shutting down I²C bus... ");
if (nerrors != 0) { esp_err_t err = i2c_driver_delete(I2C_NUM_0);
arg_print_errors(stderr, i2cset_args.end, argv[0]); if (err == ESP_ERR_INVALID_ARG)
return 0; printf("Failed, invalid arguments!\n");
} else
printf("Success!\n");
/* Check chip address: "-c" option */
int chip_addr = i2cset_args.chip_address->ival[0];
/* Check register address: "-r" option */
int data_addr = 0;
if (i2cset_args.register_address->count) {
data_addr = i2cset_args.register_address->ival[0];
}
/* Check data: "-d" option */
int len = i2cset_args.data->count;
i2c_master_driver_initialize();
i2c_driver_install(i2c_port, I2C_MODE_MASTER, I2C_MASTER_RX_BUF_DISABLE, I2C_MASTER_TX_BUF_DISABLE, 0);
i2c_cmd_handle_t cmd = i2c_cmd_link_create();
i2c_master_start(cmd);
i2c_master_write_byte(cmd, chip_addr << 1 | WRITE_BIT, ACK_CHECK_EN);
if (i2cset_args.register_address->count) {
i2c_master_write_byte(cmd, data_addr, ACK_CHECK_EN);
}
for (int i = 0; i < len; i++) {
i2c_master_write_byte(cmd, i2cset_args.data->ival[i], ACK_CHECK_EN);
}
i2c_master_stop(cmd);
esp_err_t ret = i2c_master_cmd_begin(i2c_port, cmd, 1000 / portTICK_RATE_MS);
i2c_cmd_link_delete(cmd);
if (ret == ESP_OK) {
ESP_LOGI(TAG, "Write OK");
} else if (ret == ESP_ERR_TIMEOUT) {
ESP_LOGW(TAG, "Bus is busy");
} else {
ESP_LOGW(TAG, "Write Failed");
}
i2c_driver_delete(i2c_port);
return 0;
}
static int do_i2cconfig_cmd(int argc, char **argv)
{
int nerrors = arg_parse(argc, argv, (void **)&i2cconfig_args);
if (nerrors != 0) {
arg_print_errors(stderr, i2cconfig_args.end, argv[0]);
return 0;
}
/* Check "--port" option */
if (i2cconfig_args.port->count) {
if (i2c_get_port(i2cconfig_args.port->ival[0], &i2c_port) != ESP_OK) {
return 1;
}
}
/* Check "--freq" option */
if (i2cconfig_args.freq->count) {
i2c_frequency = i2cconfig_args.freq->ival[0];
}
/* Check "--sda" option */
i2c_gpio_sda = i2cconfig_args.sda->ival[0];
/* Check "--scl" option */
i2c_gpio_scl = i2cconfig_args.scl->ival[0];
return 0;
}
int fd;
void user_delay_ms(uint32_t period);
void print_sensor_data(struct bme280_data *comp_data);
int8_t user_i2c_read(uint8_t id, uint8_t reg_addr, uint8_t *data, uint16_t len);
int8_t user_i2c_write(uint8_t id, uint8_t reg_addr, uint8_t *data, uint16_t len);
int8_t stream_sensor_data_forced_mode(struct bme280_dev *dev);
/*!
* @brief This function reading the sensor's registers through I2C bus.
*/
int8_t user_i2c_read(uint8_t id, uint8_t reg_addr, uint8_t *data, uint16_t len)
{
write(fd, &reg_addr, 1);
read(fd, data, len);
return 0;
}
/*!
* @brief This function provides the delay for required time (Microseconds) as per the input provided in some of the
* APIs
*/
void user_delay_ms(uint32_t period)
{
/* Milliseconds convert to microseconds */
usleep(period * 1000);
}
/*!
* @brief This function for writing the sensor's registers through I2C bus.
*/
int8_t user_i2c_write(uint8_t id, uint8_t reg_addr, uint8_t *data, uint16_t len)
{
int8_t *buf;
buf = malloc(len + 1);
buf[0] = reg_addr;
memcpy(buf + 1, data, len);
if (write(fd, buf, len + 1) < len)
{
return BME280_E_COMM_FAIL;
}
free(buf);
return BME280_OK;
}
/*!
* @brief This API used to print the sensor temperature, pressure and humidity data.
*/
void print_sensor_data(struct bme280_data *comp_data)
{
float temp, press, hum;
#ifdef BME280_FLOAT_ENABLE
temp = comp_data->temperature;
press = 0.01 * comp_data->pressure;
hum = comp_data->humidity;
#else
#ifdef BME280_64BIT_ENABLE
temp = 0.01f * comp_data->temperature;
press = 0.0001f * comp_data->pressure;
hum = 1.0f / 1024.0f * comp_data->humidity;
#else
temp = 0.01f * comp_data->temperature;
press = 0.01f * comp_data->pressure;
hum = 1.0f / 1024.0f * comp_data->humidity;
#endif
#endif
printf("%0.2lf deg C, %0.2lf hPa, %0.2lf%%\n", temp, press, hum);
}
/*!
* @brief This API reads the sensor temperature, pressure and humidity data in forced mode.
*/
int8_t stream_sensor_data_forced_mode(struct bme280_dev *dev)
{
/* Variable to define the result */
int8_t rslt = BME280_OK;
/* Variable to define the selecting sensors */
uint8_t settings_sel = 0;
/* Variable to store minimum wait time between consecutive measurement in force mode */
uint32_t req_delay;
/* Structure to get the pressure, temperature and humidity values */
struct bme280_data comp_data;
/* Recommended mode of operation: Indoor navigation */
dev->settings.osr_h = BME280_OVERSAMPLING_1X;
dev->settings.osr_p = BME280_OVERSAMPLING_16X;
dev->settings.osr_t = BME280_OVERSAMPLING_2X;
dev->settings.filter = BME280_FILTER_COEFF_16;
settings_sel = BME280_OSR_PRESS_SEL | BME280_OSR_TEMP_SEL | BME280_OSR_HUM_SEL | BME280_FILTER_SEL;
/* Set the sensor settings */
rslt = bme280_set_sensor_settings(settings_sel, dev);
if (rslt != BME280_OK)
{
fprintf(stderr, "Failed to set sensor settings (code %+d).", rslt);
return rslt;
}
printf("Temperature, Pressure, Humidity\n");
/*Calculate the minimum delay required between consecutive measurement based upon the sensor enabled
* and the oversampling configuration. */
req_delay = bme280_cal_meas_delay(&dev->settings);
/* Continuously stream sensor data */
while (1)
{
/* Set the sensor to forced mode */
rslt = bme280_set_sensor_mode(BME280_FORCED_MODE, dev);
if (rslt != BME280_OK)
{
fprintf(stderr, "Failed to set sensor mode (code %+d).", rslt);
break;
}
/* Wait for the measurement to complete and print data */
dev->delay_ms(req_delay);
rslt = bme280_get_sensor_data(BME280_ALL, &comp_data, dev);
if (rslt != BME280_OK)
{
fprintf(stderr, "Failed to get sensor data (code %+d).", rslt);
break;
}
print_sensor_data(&comp_data);
}
return rslt;
}
static esp_err_t i2c_master_driver_initialize()
{
i2c_config_t conf = {
.mode = I2C_MODE_MASTER,
.sda_io_num = i2c_gpio_sda,
.sda_pullup_en = GPIO_PULLUP_ENABLE,
.scl_io_num = i2c_gpio_scl,
.scl_pullup_en = GPIO_PULLUP_ENABLE,
.master.clk_speed = i2c_frequency
};
return i2c_param_config(i2c_port, &conf);
} }
void app_main(void) void app_main(void)
{ {
i2c_setup();
i2c_detect();
i2c_shutdown();
u8g2_esp32_hal_t u8g2_esp32_hal = U8G2_ESP32_HAL_DEFAULT;
u8g2_esp32_hal.sda = 18;
u8g2_esp32_hal.scl = 19;
u8g2_esp32_hal_init(u8g2_esp32_hal);
struct bme280_dev dev; u8g2_t u8g2;
u8g2_Setup_ssd1306_i2c_128x64_vcomh0_f(&u8g2, U8G2_R0, u8g2_esp32_i2c_byte_cb,
u8g2_esp32_gpio_and_delay_cb);
/* Variable to define the result */ //u8x8_SetI2CAddress(&u8g2.u8x8,0x78);
int8_t rslt = BME280_OK; u8x8_SetI2CAddress(&u8g2.u8x8,0x3C << 1);
u8g2_InitDisplay(&u8g2); // send init sequence to the display, display is in sleep mode after this,
u8g2_SetPowerSave(&u8g2, 0); // wake up display
/* Make sure to select BME280_I2C_ADDR_PRIM or BME280_I2C_ADDR_SEC as needed */ u8g2_SetContrast(&u8g2, 50);
dev.dev_id = BME280_I2C_ADDR_PRIM;
/* dev.dev_id = BME280_I2C_ADDR_SEC; */ u8g2_uint_t r = 10;
dev.intf = BME280_I2C_INTF; u8g2_uint_t x = r+1;
dev.read = user_i2c_read; u8g2_uint_t y = r+1;
dev.write = user_i2c_write; int8_t dx = 2;
dev.delay_ms = user_delay_ms; int8_t dy = 5;
if ((fd = open(argv[1], O_RDWR)) < 0) while (1) {
{ u8g2_ClearBuffer(&u8g2);
fprintf(stderr, "Failed to open the i2c bus %s\n", argv[1]); u8g2_DrawDisc(&u8g2, x, y, r, U8G2_DRAW_ALL);
exit(1); u8g2_DrawFrame(&u8g2, 0, 0, 128, 64);
u8g2_SendBuffer(&u8g2);
x = x + dx;
y = y + dy;
if (x <= 0+r+1 || x >= 127-r-1) {
dx = dx * -1;
}
if (y <= 0+r+1 || y >= 63-r-1) {
dy = dy * -1;
vTaskDelay(10 / portTICK_PERIOD_MS);
}
} }
#ifdef __KERNEL__
if (ioctl(fd, I2C_SLAVE, dev.dev_id) < 0)
{
fprintf(stderr, "Failed to acquire bus access and/or talk to slave.\n");
exit(1);
}
#endif
/* Initialize the bme280 */
rslt = bme280_init(&dev);
if (rslt != BME280_OK)
{
fprintf(stderr, "Failed to initialize the device (code %+d).\n", rslt);
exit(1);
}
rslt = stream_sensor_data_forced_mode(&dev);
if (rslt != BME280_OK)
{
fprintf(stderr, "Failed to stream sensor data (code %+d).\n", rslt);
exit(1);
}
return ;
} }

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main/u8g2_esp32_hal.c Normal file
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#include <stdio.h>
#include <string.h>
#include "sdkconfig.h"
#include "esp_log.h"
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "u8g2_esp32_hal.h"
static const char *TAG = "u8g2_hal";
static const unsigned int I2C_TIMEOUT_MS = 1000;
static i2c_cmd_handle_t handle_i2c; // I2C handle.
static u8g2_esp32_hal_t u8g2_esp32_hal; // HAL state data.
#undef ESP_ERROR_CHECK
#define ESP_ERROR_CHECK(x) do { esp_err_t rc = (x); if (rc != ESP_OK) { ESP_LOGE("err", "esp_err_t = %d", rc); assert(0 && #x);} } while(0);
/*
* Initialze the ESP32 HAL.
*/
void u8g2_esp32_hal_init(u8g2_esp32_hal_t u8g2_esp32_hal_param) {
u8g2_esp32_hal = u8g2_esp32_hal_param;
} // u8g2_esp32_hal_init
/*
* HAL callback function as prescribed by the U8G2 library. This callback is invoked
* to handle I2C communications.
*/
uint8_t u8g2_esp32_i2c_byte_cb(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int, void *arg_ptr) {
//ESP_LOGD(TAG, "i2c_cb: Received a msg: %d, arg_int: %d, arg_ptr: %p", msg, arg_int, arg_ptr);
switch(msg) {
case U8X8_MSG_BYTE_SET_DC: {
if (u8g2_esp32_hal.dc != U8G2_ESP32_HAL_UNDEFINED) {
gpio_set_level(u8g2_esp32_hal.dc, arg_int);
}
break;
}
case U8X8_MSG_BYTE_INIT: {
if (u8g2_esp32_hal.sda == U8G2_ESP32_HAL_UNDEFINED ||
u8g2_esp32_hal.scl == U8G2_ESP32_HAL_UNDEFINED) {
break;
}
i2c_config_t conf;
conf.mode = I2C_MODE_MASTER;
ESP_LOGI(TAG, "sda_io_num %d", u8g2_esp32_hal.sda);
conf.sda_io_num = u8g2_esp32_hal.sda;
conf.sda_pullup_en = GPIO_PULLUP_ENABLE;
ESP_LOGI(TAG, "scl_io_num %d", u8g2_esp32_hal.scl);
conf.scl_io_num = u8g2_esp32_hal.scl;
conf.scl_pullup_en = GPIO_PULLUP_ENABLE;
ESP_LOGI(TAG, "clk_speed %d", I2C_MASTER_FREQ_HZ);
conf.master.clk_speed = I2C_MASTER_FREQ_HZ;
ESP_LOGI(TAG, "i2c_param_config %d", conf.mode);
ESP_ERROR_CHECK(i2c_param_config(I2C_MASTER_NUM, &conf));
ESP_LOGI(TAG, "i2c_driver_install %d", I2C_MASTER_NUM);
ESP_ERROR_CHECK(i2c_driver_install(I2C_MASTER_NUM, conf.mode, I2C_MASTER_RX_BUF_DISABLE, I2C_MASTER_TX_BUF_DISABLE, 0));
break;
}
case U8X8_MSG_BYTE_SEND: {
uint8_t* data_ptr = (uint8_t*)arg_ptr;
ESP_LOG_BUFFER_HEXDUMP(TAG, data_ptr, arg_int, ESP_LOG_VERBOSE);
while( arg_int > 0 ) {
ESP_ERROR_CHECK(i2c_master_write_byte(handle_i2c, *data_ptr, ACK_CHECK_EN));
data_ptr++;
arg_int--;
}
break;
}
case U8X8_MSG_BYTE_START_TRANSFER: {
uint8_t i2c_address = u8x8_GetI2CAddress(u8x8);
handle_i2c = i2c_cmd_link_create();
ESP_LOGD(TAG, "Start I2C transfer to %02X.", i2c_address>>1);
ESP_ERROR_CHECK(i2c_master_start(handle_i2c));
ESP_ERROR_CHECK(i2c_master_write_byte(handle_i2c, i2c_address | I2C_MASTER_WRITE, ACK_CHECK_EN));
break;
}
case U8X8_MSG_BYTE_END_TRANSFER: {
ESP_LOGD(TAG, "End I2C transfer.");
ESP_ERROR_CHECK(i2c_master_stop(handle_i2c));
ESP_ERROR_CHECK(i2c_master_cmd_begin(I2C_MASTER_NUM, handle_i2c, I2C_TIMEOUT_MS / portTICK_RATE_MS));
i2c_cmd_link_delete(handle_i2c);
break;
}
}
return 0;
} // u8g2_esp32_i2c_byte_cb
/*
* HAL callback function as prescribed by the U8G2 library. This callback is invoked
* to handle callbacks for GPIO and delay functions.
*/
uint8_t u8g2_esp32_gpio_and_delay_cb(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int, void *arg_ptr) {
ESP_LOGD(TAG, "gpio_and_delay_cb: Received a msg: %d, arg_int: %d, arg_ptr: %p", msg, arg_int, arg_ptr);
switch(msg) {
// Initialize the GPIO and DELAY HAL functions. If the pins for DC and RESET have been
// specified then we define those pins as GPIO outputs.
case U8X8_MSG_GPIO_AND_DELAY_INIT: {
uint64_t bitmask = 0;
if (u8g2_esp32_hal.dc != U8G2_ESP32_HAL_UNDEFINED) {
bitmask = bitmask | (1ull<<u8g2_esp32_hal.dc);
}
if (u8g2_esp32_hal.reset != U8G2_ESP32_HAL_UNDEFINED) {
bitmask = bitmask | (1ull<<u8g2_esp32_hal.reset);
}
if (u8g2_esp32_hal.cs != U8G2_ESP32_HAL_UNDEFINED) {
bitmask = bitmask | (1ull<<u8g2_esp32_hal.cs);
}
if (bitmask==0) {
break;
}
gpio_config_t gpioConfig;
gpioConfig.pin_bit_mask = bitmask;
gpioConfig.mode = GPIO_MODE_OUTPUT;
gpioConfig.pull_up_en = GPIO_PULLUP_DISABLE;
gpioConfig.pull_down_en = GPIO_PULLDOWN_ENABLE;
gpioConfig.intr_type = GPIO_INTR_DISABLE;
gpio_config(&gpioConfig);
break;
}
// Set the GPIO reset pin to the value passed in through arg_int.
case U8X8_MSG_GPIO_RESET:
if (u8g2_esp32_hal.reset != U8G2_ESP32_HAL_UNDEFINED) {
gpio_set_level(u8g2_esp32_hal.reset, arg_int);
}
break;
// Set the GPIO client select pin to the value passed in through arg_int.
case U8X8_MSG_GPIO_CS:
if (u8g2_esp32_hal.cs != U8G2_ESP32_HAL_UNDEFINED) {
gpio_set_level(u8g2_esp32_hal.cs, arg_int);
}
break;
// Set the Software I²C pin to the value passed in through arg_int.
case U8X8_MSG_GPIO_I2C_CLOCK:
if (u8g2_esp32_hal.scl != U8G2_ESP32_HAL_UNDEFINED) {
gpio_set_level(u8g2_esp32_hal.scl, arg_int);
// printf("%c",(arg_int==1?'C':'c'));
}
break;
// Set the Software I²C pin to the value passed in through arg_int.
case U8X8_MSG_GPIO_I2C_DATA:
if (u8g2_esp32_hal.sda != U8G2_ESP32_HAL_UNDEFINED) {
gpio_set_level(u8g2_esp32_hal.sda, arg_int);
// printf("%c",(arg_int==1?'D':'d'));
}
break;
// Delay for the number of milliseconds passed in through arg_int.
case U8X8_MSG_DELAY_MILLI:
vTaskDelay(arg_int/portTICK_PERIOD_MS);
break;
}
return 0;
} // u8g2_esp32_gpio_and_delay_cb

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main/u8g2_esp32_hal.h Normal file
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/*
* u8g2_esp32_hal.h
*
* Created on: Feb 12, 2017
* Author: kolban
*/
#include "driver/gpio.h"
#include "driver/i2c.h"
#ifndef U8G2_ESP32_HAL_H_
#define U8G2_ESP32_HAL_H_
#include "u8g2.h"
#define U8G2_ESP32_HAL_UNDEFINED (-1)
#define I2C_MASTER_NUM I2C_NUM_1 // I2C port number for master dev
#define I2C_MASTER_TX_BUF_DISABLE 0 // I2C master do not need buffer
#define I2C_MASTER_RX_BUF_DISABLE 0 // I2C master do not need buffer
#define I2C_MASTER_FREQ_HZ 1000000 // I2C master clock frequency
#define ACK_CHECK_EN 0x1 // I2C master will check ack from slave
#define ACK_CHECK_DIS 0x0 // I2C master will not check ack from slave
typedef struct {
gpio_num_t clk;
gpio_num_t mosi;
gpio_num_t sda; // data for I²C
gpio_num_t scl; // clock for I²C
gpio_num_t cs;
gpio_num_t reset;
gpio_num_t dc;
} u8g2_esp32_hal_t ;
#define U8G2_ESP32_HAL_DEFAULT {U8G2_ESP32_HAL_UNDEFINED, U8G2_ESP32_HAL_UNDEFINED, U8G2_ESP32_HAL_UNDEFINED, U8G2_ESP32_HAL_UNDEFINED, U8G2_ESP32_HAL_UNDEFINED, U8G2_ESP32_HAL_UNDEFINED, U8G2_ESP32_HAL_UNDEFINED }
void u8g2_esp32_hal_init(u8g2_esp32_hal_t u8g2_esp32_hal_param);
uint8_t u8g2_esp32_i2c_byte_cb(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int, void *arg_ptr);
uint8_t u8g2_esp32_gpio_and_delay_cb(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int, void *arg_ptr);
#endif /* U8G2_ESP32_HAL_H_ */