zener/lvgl_esp32_drivers
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

Move drivers from the lv_port_esp32 to here

Browse source
This commit is contained in:
C47D 2020-12-17 00:02:55 -06:00
parent 5a32d98f83
commit 08384030b0
69 changed files with 14977 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

242
lvgl_touch/stmpe610.c Normal file
View file

@ -0,0 +1,242 @@
/**
* @file STMPE610.c
*/
/*********************
* INCLUDES
*********************/
#include "stmpe610.h"
#include "esp_system.h"
#include "esp_log.h"
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "driver/gpio.h"
#include "tp_spi.h"
#include <stddef.h>
/*********************
* DEFINES
*********************/
#define TAG "STMPE610"
/**********************
* TYPEDEFS
**********************/
/**********************
* STATIC PROTOTYPES
**********************/
static void write_8bit_reg(uint8_t reg, uint8_t val);
static uint16_t read_16bit_reg(uint8_t reg);
static uint8_t read_8bit_reg(uint8_t reg);
static void read_data(int16_t *x, int16_t *y, uint8_t *z);
static bool buffer_empty();
static void adjust_data(int16_t * x, int16_t * y);
/**********************
* STATIC VARIABLES
**********************/
/**********************
* MACROS
**********************/
/**********************
* GLOBAL FUNCTIONS
**********************/
/**
* Initialize the STMPE610
*/
void stmpe610_init(void)
{
uint8_t u8;
uint16_t u16;
ESP_LOGI(TAG, "Initialization.");
// Get the initial SPI configuration
//u8 = read_8bit_reg(STMPE_SPI_CFG);
//ESP_LOGI(TAG, "SPI_CFG = 0x%x", u8);
// Attempt a software reset
write_8bit_reg(STMPE_SYS_CTRL1, STMPE_SYS_CTRL1_RESET);
vTaskDelay(10 / portTICK_RATE_MS);
// Reset the SPI configuration, making sure auto-increment is set
u8 = read_8bit_reg(STMPE_SPI_CFG);
write_8bit_reg(STMPE_SPI_CFG, u8 | STMPE_SPI_CFG_AA);
u8 = read_8bit_reg(STMPE_SPI_CFG);
ESP_LOGI(TAG, "SPI_CFG = 0x%x", u8);
// Verify SPI communication
u16 = read_16bit_reg(STMPE_CHIP_ID);
if (u16 != 0x811) {
ESP_LOGE(TAG, "Incorrect version: 0x%x", u16);
}
write_8bit_reg(STMPE_SYS_CTRL2, 0x00); // Disable clocks
write_8bit_reg(STMPE_TSC_CTRL, 0); // Disable to allow writing
write_8bit_reg(STMPE_TSC_CTRL,
STEMP_TSC_CTRL_TRACK_0 |
STMPE_TSC_CTRL_XYZ |
STMPE_TSC_CTRL_EN);
write_8bit_reg(STMPE_TSC_CFG, STMPE_TSC_CFG_4SAMPLE |
STMPE_TSC_CFG_DELAY_1MS |
STMPE_TSC_CFG_SETTLE_1MS);
write_8bit_reg(STMPE_TSC_FRACTION_Z, 0x7);
write_8bit_reg(STMPE_TSC_I_DRIVE, STMPE_TSC_I_DRIVE_50MA);
write_8bit_reg(STMPE_SYS_CTRL2, 0x04); // GPIO clock off, TSC clock on, ADC clock on
write_8bit_reg(STMPE_ADC_CTRL1, STMPE_ADC_CTRL1_12BIT | STMPE_ADC_CTRL1_80CLK);
write_8bit_reg(STMPE_ADC_CTRL2, STMPE_ADC_CTRL2_3_25MHZ);
write_8bit_reg(STMPE_GPIO_ALT_FUNCT, 0x00); // Disable GPIO
write_8bit_reg(STMPE_FIFO_TH, 1); // Set FIFO threshold
write_8bit_reg(STMPE_FIFO_STA, STMPE_FIFO_STA_RESET); // Assert FIFO reset
write_8bit_reg(STMPE_FIFO_STA, 0); // Deassert FIFO reset
write_8bit_reg(STMPE_INT_EN, 0x00); // No interrupts
write_8bit_reg(STMPE_INT_STA, 0xFF); // reset all ints
}
/**
* Get the current position and state of the touchpad
* @param data store the read data here
* @return false: because no more data to be read
*/
bool stmpe610_read(lv_indev_drv_t * drv, lv_indev_data_t * data)
{
static int16_t last_x = 0;
static int16_t last_y = 0;
bool valid = true;
int c = 0;
int16_t x = 0;
int16_t y = 0;
uint8_t z;
if ((read_8bit_reg(STMPE_TSC_CTRL) & STMPE_TSC_TOUCHED) == STMPE_TSC_TOUCHED) {
// Making sure that we read all data and return the latest point
while (!buffer_empty()) {
read_data(&x, &y, &z);
c++;
}
if (c > 0) {
//ESP_LOGI(TAG, "%d: %d %d %d", c, x, y, z);
adjust_data(&x, &y);
last_x = x;
last_y = y;
//ESP_LOGI(TAG, " ==> %d %d", x, y);
}
z = read_8bit_reg(STMPE_INT_STA); // Clear interrupts
z = read_8bit_reg(STMPE_FIFO_STA);
if ((z & STMPE_FIFO_STA_OFLOW) == STMPE_FIFO_STA_OFLOW) {
// Clear the FIFO if we discover an overflow
write_8bit_reg(STMPE_FIFO_STA, STMPE_FIFO_STA_RESET);
write_8bit_reg(STMPE_FIFO_STA, 0); // unreset
ESP_LOGE(TAG, "Fifo overflow");
}
}
if (c == 0) {
x = last_x;
y = last_y;
valid = false;
}
data->point.x = (int16_t) x;
data->point.y = (int16_t) y;
data->state = valid == false ? LV_INDEV_STATE_REL : LV_INDEV_STATE_PR;
return false;
}
/**********************
* STATIC FUNCTIONS
**********************/
static void write_8bit_reg(uint8_t reg, uint8_t val)
{
uint8_t data_send[2];
data_send[0] = reg;
data_send[1] = val;
tp_spi_write_reg(data_send, 2);
}
static uint16_t read_16bit_reg(uint8_t reg)
{
uint8_t data_recv[2];
tp_spi_read_reg(0x80 | reg, data_recv, 2);
return data_recv[0] << 8 | data_recv[1];
}
static uint8_t read_8bit_reg(uint8_t reg)
{
uint8_t data_recv;
tp_spi_read_reg(0x80 | reg, &data_recv, 1);
return data_recv;
}
static void read_data(int16_t *x, int16_t *y, uint8_t *z)
{
*x = read_16bit_reg(STMPE_TSC_DATA_X);
*y = read_16bit_reg(STMPE_TSC_DATA_Y);
*z = read_8bit_reg(STMPE_TSC_DATA_Z);
}
static bool buffer_empty()
{
return ((read_8bit_reg(STMPE_FIFO_STA) & STMPE_FIFO_STA_EMPTY) == STMPE_FIFO_STA_EMPTY);
}
static void adjust_data(int16_t * x, int16_t * y)
{
#if STMPE610_XY_SWAP != 0
int16_t swap_tmp;
swap_tmp = *x;
*x = *y;
*y = swap_tmp;
#endif
if((*x) > STMPE610_X_MIN)(*x) -= STMPE610_X_MIN;
else(*x) = 0;
if((*y) > STMPE610_Y_MIN)(*y) -= STMPE610_Y_MIN;
else(*y) = 0;
(*x) = (uint32_t)((uint32_t)(*x) * LV_HOR_RES) /
(STMPE610_X_MAX - STMPE610_X_MIN);
(*y) = (uint32_t)((uint32_t)(*y) * LV_VER_RES) /
(STMPE610_Y_MAX - STMPE610_Y_MIN);
#if STMPE610_X_INV != 0
(*x) = LV_HOR_RES - (*x);
#endif
#if STMPE610_Y_INV != 0
(*y) = LV_VER_RES - (*y);
#endif
}