110 lines
2.3 KiB
C
110 lines
2.3 KiB
C
/**
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* @file tp_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 "tp_spi.h"
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#include "touch_driver.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 "../lvgl_helpers.h"
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#include "../lvgl_spi_conf.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 spi_device_handle_t spi;
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/**********************
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* STATIC VARIABLES
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**********************/
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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 tp_spi_add_device_config(spi_host_device_t host, spi_device_interface_config_t *devcfg)
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{
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esp_err_t ret=spi_bus_add_device(host, devcfg, &spi);
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assert(ret==ESP_OK);
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}
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void tp_spi_add_device(spi_host_device_t host)
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{
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spi_device_interface_config_t devcfg={
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.clock_speed_hz = SPI_TOUCH_CLOCK_SPEED_HZ,
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.mode = SPI_TOUCH_SPI_MODE,
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.spics_io_num=TP_SPI_CS, //CS pin
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.queue_size=1,
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.pre_cb=NULL,
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.post_cb=NULL,
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.command_bits = 8,
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.address_bits = 0,
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.dummy_bits = 0,
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.flags = SPI_DEVICE_HALFDUPLEX | SPI_DEVICE_NO_DUMMY,
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};
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//Attach the Touch controller to the SPI bus
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tp_spi_add_device_config(host, &devcfg);
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}
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void tp_spi_xchg(uint8_t* data_send, uint8_t* data_recv, uint8_t byte_count)
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{
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spi_transaction_t t = {
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.length = byte_count * 8, // SPI transaction length is in bits
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.tx_buffer = data_send,
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.rx_buffer = data_recv};
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esp_err_t ret = spi_device_transmit(spi, &t);
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assert(ret == ESP_OK);
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}
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void tp_spi_write_reg(uint8_t* data, uint8_t byte_count)
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{
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spi_transaction_t t = {
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.length = byte_count * 8,
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.tx_buffer = data,
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.flags = 0
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};
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esp_err_t ret = spi_device_transmit(spi, &t);
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assert(ret == ESP_OK);
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}
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void tp_spi_read_reg(uint8_t reg, uint8_t* data, uint8_t byte_count)
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{
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spi_transaction_t t = {
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.length = (byte_count + sizeof(reg)) * 8,
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.rxlength = byte_count * 8,
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.cmd = reg,
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.rx_buffer = data,
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.flags = 0
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};
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// Read - send first byte as command
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esp_err_t ret = spi_device_transmit(spi, &t);
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assert(ret == ESP_OK);
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}
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/**********************
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* STATIC FUNCTIONS
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**********************/
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