130 lines
3.1 KiB
C
130 lines
3.1 KiB
C
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/**
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* @file disp_spi.c
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*
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*/
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/*********************
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* INCLUDES
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*********************/
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#include "disp_spi.h"
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#include "esp_system.h"
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#include "driver/gpio.h"
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#include "driver/spi_master.h"
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#include <string.h>
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#include <freertos/FreeRTOS.h>
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#include <freertos/semphr.h>
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#include "freertos/task.h"
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#include "lvgl/lvgl.h"
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#include "ili9341.h"
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/*********************
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* DEFINES
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*********************/
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/**********************
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* TYPEDEFS
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**********************/
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/**********************
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* STATIC PROTOTYPES
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**********************/
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static void IRAM_ATTR spi_ready (spi_transaction_t *trans);
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/**********************
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* STATIC VARIABLES
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**********************/
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static spi_device_handle_t spi;
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static volatile bool spi_trans_in_progress;
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static volatile bool spi_color_sent;
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/**********************
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* MACROS
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**********************/
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/**********************
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* GLOBAL FUNCTIONS
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**********************/
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void disp_spi_init(void)
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{
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esp_err_t ret;
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spi_bus_config_t buscfg={
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.miso_io_num=-1,
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.mosi_io_num=DISP_SPI_MOSI,
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.sclk_io_num=DISP_SPI_CLK,
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.quadwp_io_num=-1,
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.quadhd_io_num=-1,
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.max_transfer_sz = DISP_BUF_SIZE * 2,
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};
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spi_device_interface_config_t devcfg={
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.clock_speed_hz=40*1000*1000, //Clock out at 40 MHz
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.mode=0, //SPI mode 0
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.spics_io_num=DISP_SPI_CS, //CS pin
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.queue_size=1,
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.pre_cb=NULL,
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.post_cb=spi_ready,
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.flags = SPI_DEVICE_HALFDUPLEX
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};
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//Initialize the SPI bus
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ret=spi_bus_initialize(HSPI_HOST, &buscfg, 1);
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assert(ret==ESP_OK);
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//Attach the LCD to the SPI bus
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ret=spi_bus_add_device(HSPI_HOST, &devcfg, &spi);
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assert(ret==ESP_OK);
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}
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void disp_spi_send_data(uint8_t * data, uint16_t length)
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{
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if (length == 0) return; //no need to send anything
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while(spi_trans_in_progress);
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spi_transaction_t t = {
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.length = length * 8, // transaction length is in bits
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.tx_buffer = data
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};
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spi_trans_in_progress = true;
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spi_color_sent = false; //Mark the "lv_flush_ready" NOT needs to be called in "spi_ready"
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spi_device_queue_trans(spi, &t, portMAX_DELAY);
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}
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void disp_spi_send_colors(uint8_t * data, uint16_t length)
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{
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if (length == 0) return; //no need to send anything
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while(spi_trans_in_progress);
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spi_transaction_t t = {
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.length = length * 8, // transaction length is in bits
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.tx_buffer = data
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};
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spi_trans_in_progress = true;
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spi_color_sent = true; //Mark the "lv_flush_ready" needs to be called in "spi_ready"
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spi_device_queue_trans(spi, &t, portMAX_DELAY);
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}
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bool disp_spi_is_busy(void)
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{
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return spi_trans_in_progress;
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}
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/**********************
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* STATIC FUNCTIONS
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**********************/
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static void IRAM_ATTR spi_ready (spi_transaction_t *trans)
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{
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spi_trans_in_progress = false;
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lv_disp_t * disp = lv_refr_get_disp_refreshing();
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if(spi_color_sent) lv_disp_flush_ready(&disp->driver);
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}
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