93 lines
1.7 KiB
C
93 lines
1.7 KiB
C
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/**
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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 "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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/*********************
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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_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=TP_SPI_MISO,
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.mosi_io_num=TP_SPI_MOSI,
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.sclk_io_num=TP_SPI_CLK,
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.quadwp_io_num=-1,
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.quadhd_io_num=-1
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};
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spi_device_interface_config_t devcfg={
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.clock_speed_hz=2*1000*1000, //Clock out at 80 MHz
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.mode=0, //SPI mode 0
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.spics_io_num=-1, //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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};
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//Initialize the SPI bus
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ret=spi_bus_initialize(VSPI_HOST, &buscfg, 2);
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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(VSPI_HOST, &devcfg, &spi);
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assert(ret==ESP_OK);
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}
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uint8_t tp_spi_xchg(uint8_t data_send)
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{
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uint8_t data_recv = 0;
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spi_transaction_t t = {
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.length = 8, // length is in bits
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.tx_buffer = &data_send,
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.rx_buffer = &data_recv
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};
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spi_device_queue_trans(spi, &t, portMAX_DELAY);
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spi_transaction_t * rt;
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spi_device_get_trans_result(spi, &rt, portMAX_DELAY);
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return data_recv;
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}
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/**********************
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* STATIC FUNCTIONS
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**********************/
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