121 lines
3.6 KiB
C
121 lines
3.6 KiB
C
#include <stdlib.h>
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#include <unistd.h>
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#include "lvgl.h"
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#include "utils/user_log_util.h"
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#include "impl/user_st7789_impl.h"
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extern user_config_t g_config;
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extern user_spi_driver_t g_spi;
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int _user_st7789_impl_init_pin(user_gpio_t *gpio, char *pin_name, uint8_t is_output) {
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char *chip;
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uint32_t offset;
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char name_buffer[64];
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snprintf(name_buffer, 64, "agent.devices.lcd.%s_pin.path", pin_name);
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chip = user_config_lookup_string(&g_config, name_buffer);
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if(chip == NULL) return -1;
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snprintf(name_buffer, 64, "agent.devices.lcd.%s_pin.line", pin_name);
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if(user_config_lookup_int(&g_config, name_buffer, &offset) != 0) return -2;
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if(user_gpio_init(gpio, chip, offset, is_output) != 0) return -3;
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return 0;
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}
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int user_st7789_impl_init(void *handle) {
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user_st7789_impl_t *impl = handle;
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impl->cs_gpio = malloc(sizeof(user_gpio_t));
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if(!impl->cs_gpio) return -1;
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impl->dc_gpio = malloc(sizeof(user_gpio_t));
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if(!impl->dc_gpio) return -1;
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impl->reset_gpio = malloc(sizeof(user_gpio_t));
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if(!impl->reset_gpio) return -1;
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if(_user_st7789_impl_init_pin(impl->cs_gpio, "cs", 1) != 0) {
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free(impl->cs_gpio);
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impl->cs_gpio = NULL;
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USER_LOG(USER_LOG_WARN, "No CS pin found, SPI must be correctly configured.");
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}
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if(_user_st7789_impl_init_pin(impl->dc_gpio, "dc", 1) != 0) {
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USER_LOG(USER_LOG_ERROR, "DC pin not found.");
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return -2;
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}
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if(_user_st7789_impl_init_pin(impl->reset_gpio, "reset", 1) != 0) {
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free(impl->reset_gpio);
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impl->reset_gpio = NULL;
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USER_LOG(USER_LOG_WARN, "No Reset pin found.");
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}
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impl->spi_driver = &g_spi;
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return 0;
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}
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void user_st7789_impl_deinit(void *handle) {
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user_st7789_impl_t *impl = handle;
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user_gpio_deinit(impl->cs_gpio);
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user_gpio_deinit(impl->dc_gpio);
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user_gpio_deinit(impl->reset_gpio);
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if(impl->cs_gpio) free(impl->cs_gpio);
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if(impl->dc_gpio) free(impl->dc_gpio);
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if(impl->reset_gpio) free(impl->reset_gpio);
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}
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st7789_ret_t user_st7789_impl_write_cmd(void *handle, uint8_t *cmd,
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uint8_t len) {
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user_st7789_impl_t *impl = handle;
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if(impl->dc_gpio && (user_gpio_set(impl->dc_gpio, 0) != 0)) return ST7789_ERROR;
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if(impl->cs_gpio && (user_gpio_set(impl->cs_gpio, 0) != 0)) return ST7789_ERROR;
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// ST7789VW requires parameters to be sent with DC=0.
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if(user_spi_driver_xfer(impl->spi_driver, cmd, NULL, len) != 0) {
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if(impl->cs_gpio) user_gpio_set(impl->cs_gpio, 1);
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return ST7789_ERROR;
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}
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if(impl->cs_gpio && (user_gpio_set(impl->cs_gpio, 1) != 0)) return ST7789_ERROR;
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return ST7789_OK;
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}
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st7789_ret_t user_st7789_impl_write_data(void *handle, uint8_t *data,
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uint32_t len) {
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user_st7789_impl_t *impl = handle;
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if(impl->dc_gpio && (user_gpio_set(impl->dc_gpio, 1) != 0)) return ST7789_ERROR;
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if(impl->cs_gpio && (user_gpio_set(impl->cs_gpio, 0) != 0)) return ST7789_ERROR;
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if(user_spi_driver_xfer(impl->spi_driver, data, NULL, len) != 0) {
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if(impl->cs_gpio) user_gpio_set(impl->cs_gpio, 1);
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return ST7789_ERROR;
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}
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if(impl->cs_gpio && (user_gpio_set(impl->cs_gpio, 1) != 0)) return ST7789_ERROR;
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return ST7789_OK;
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}
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st7789_ret_t user_st7789_impl_reset(void *handle) {
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user_st7789_impl_t *impl = handle;
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if(&impl->reset_gpio == NULL) return ST7789_OK;
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if(user_gpio_set(impl->reset_gpio, 0) != 0) return ST7789_ERROR;
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usleep(10 * 1000); // Sleep 10ms
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if(user_gpio_set(impl->cs_gpio, 1) != 0) return ST7789_ERROR;
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}
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