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touch: Add Tuning Calibration

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This, for now, can be done at Nyx boot by holding VOL- and VOL+.

Make sure that you don't touch the touchscreen.
This commit is contained in:
CTCaer 2020-03-21 22:03:51 +02:00
parent a8db070755
commit 91a241dafa
2 changed files with 107 additions and 33 deletions
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135
nyx/nyx_gui/input/touch.c
View file

@ -26,6 +26,7 @@
#include "../power/max77620.h"
#include "../soc/gpio.h"
#include "../soc/t210.h"
#include "../utils/btn.h"
#include "../utils/util.h"
#include "touch.h"
@ -52,15 +53,18 @@ static int touch_read_reg(u8 *cmd, u32 csize, u8 *buf, u32 size)
return 0;
}
static void touch_wait_controller_ready()
static int touch_wait_event(u8 event, u8 status, u32 timeout)
{
u32 timeout = get_tmr_ms() + 100;
u32 timer = get_tmr_ms() + timeout;
while (true)
{
u8 tmp = 0;
i2c_recv_buf_small(&tmp, 1, I2C_3, STMFTS_I2C_ADDR, STMFTS_READ_ONE_EVENT);
if (tmp == STMFTS_EV_CONTROLLER_READY || get_tmr_ms() > timeout)
break;
u8 tmp[8] = {0};
i2c_recv_buf_small(tmp, 8, I2C_3, STMFTS_I2C_ADDR, STMFTS_READ_ONE_EVENT);
if (tmp[1] == event && tmp[2] == status)
return 0;
if (get_tmr_ms() > timer)
return 1;
}
}
@ -212,8 +216,95 @@ int touch_get_fw_info(touch_fw_info_t *fw)
return res;
}
int touch_sys_reset()
{
u8 cmd[3] = { 0, 0x28, 0x80 }; // System reset cmd.
for (u8 retries = 0; retries < 3; retries++)
{
if (touch_command(STMFTS_WRITE_REG, cmd, 3))
{
msleep(10);
continue;
}
msleep(10);
if (touch_wait_event(STMFTS_EV_CONTROLLER_READY, 0, 20))
continue;
else
return 0;
}
return 1;
}
int touch_execute_autotune()
{
// Reset touchscreen module.
if (touch_sys_reset())
return 0;
// Trim low power oscillator.
touch_command(STMFTS_LP_TIMER_CALIB, NULL, 0);
msleep(200);
// Apply Mutual Sense Compensation tuning.
if (touch_command(STMFTS_MS_CX_TUNING, NULL, 0))
return 0;
if (touch_wait_event(STMFTS_EV_STATUS, 1, 2000))
return 0;
// Apply Self Sense Compensation tuning.
if (touch_command(STMFTS_SS_CX_TUNING, NULL, 0))
return 0;
if (touch_wait_event(STMFTS_EV_STATUS, 2, 2000))
return 0;
// Save Compensation data to EEPROM.
if (touch_command(STMFTS_SAVE_CX_TUNING, NULL, 0))
return 0;
if (touch_wait_event(STMFTS_EV_STATUS, 4, 2000))
return 0;
// Enable auto tuning calibration and multi-touch sensing.
u8 cmd = 1;
if (touch_command(STMFTS_AUTO_CALIBRATION, &cmd, 1))
return 0;
if (touch_command(STMFTS_MS_MT_SENSE_ON, NULL, 0))
return 0;
if (touch_command(STMFTS_CLEAR_EVENT_STACK, NULL, 0))
return 0;
return 1;
}
static int touch_init()
{
// Initialize touchscreen module.
if (touch_sys_reset())
return 0;
// Enable auto tuning calibration and multi-touch sensing.
u8 cmd = 1;
if (touch_command(STMFTS_AUTO_CALIBRATION, &cmd, 1))
return 0;
if (touch_command(STMFTS_MS_MT_SENSE_ON, NULL, 0))
return 0;
if (touch_command(STMFTS_CLEAR_EVENT_STACK, NULL, 0))
return 0;
return 1;
}
int touch_power_on()
{
// Enables LDO6 for touchscreen VDD/AVDD supply
max77620_regulator_set_volt_and_flags(REGULATOR_LDO6, 2900000, MAX77620_POWER_MODE_NORMAL);
i2c_send_byte(I2C_5, MAX77620_I2C_ADDR, MAX77620_REG_LDO6_CFG2,
MAX77620_LDO_CFG2_ADE_ENABLE | (3 << 3) | (MAX77620_POWER_MODE_NORMAL << MAX77620_LDO_POWER_MODE_SHIFT));
// Configure touchscreen GPIO.
PINMUX_AUX(PINMUX_AUX_DAP4_SCLK) = PINMUX_PULL_DOWN | 1;
gpio_config(GPIO_PORT_J, GPIO_PIN_7, GPIO_MODE_GPIO);
@ -235,32 +326,14 @@ int touch_power_on()
clock_enable_i2c(I2C_3);
i2c_init(I2C_3);
// Enables LDO6 for touchscreen VDD/AVDD supply
max77620_regulator_set_volt_and_flags(REGULATOR_LDO6, 2900000, MAX77620_POWER_MODE_NORMAL);
i2c_send_byte(I2C_5, MAX77620_I2C_ADDR, MAX77620_REG_LDO6_CFG2,
MAX77620_LDO_CFG2_ADE_ENABLE | (3 << 3) | (MAX77620_POWER_MODE_NORMAL << MAX77620_LDO_POWER_MODE_SHIFT));
// Wait for the touchscreen module to get ready.
touch_wait_event(STMFTS_EV_CONTROLLER_READY, 0, 20);
touch_wait_controller_ready();
// Initialize touchscreen module.
u8 cmd[3] = { 0, 0x28, 0x80 }; // System reset cmd.
if (touch_command(STMFTS_WRITE_REG, cmd, 3))
return 0;
msleep(10);
touch_wait_controller_ready();
cmd[0] = 1;
if (touch_command(STMFTS_AUTO_CALIBRATION, cmd, 1))
return 0;
if (touch_command(STMFTS_MS_MT_SENSE_ON, NULL, 0))
return 0;
if (touch_command(STMFTS_CLEAR_EVENT_STACK, NULL, 0))
return 0;
return 1;
u32 btn = btn_wait_timeout(0, BTN_VOL_DOWN | BTN_VOL_UP);
if ((btn & BTN_VOL_DOWN) && (btn & BTN_VOL_UP))
return touch_execute_autotune();
else
return touch_init();
}
void touch_power_off()

5
nyx/nyx_gui/input/touch.h
View file

@ -119,11 +119,12 @@ typedef struct _touch_fw_info_t {
u16 fw_rev;
} touch_fw_info_t;
int touch_power_on();
void touch_power_off();
void touch_poll(touch_event *event);
touch_event touch_poll_wait();
int touch_get_fw_info(touch_fw_info_t *fw);
touch_info touch_get_info();
int touch_execute_autotune();
int touch_power_on();
void touch_power_off();
#endif /* __TOUCH_H_ */