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touch: reset and usage updates

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This commit is contained in:
mcudev 2017-11-11 11:16:17 -05:00
parent 5556c37f6f
commit 6179edde90
2 changed files with 43 additions and 26 deletions
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52
embed/trezorhal/touch.c
View File

@ -26,7 +26,7 @@ void touch_init(void)
GPIO_InitStructure.Pin = GPIO_PIN_6 | GPIO_PIN_7;
GPIO_InitStructure.Mode = GPIO_MODE_AF_OD;
GPIO_InitStructure.Pull = GPIO_NOPULL;
GPIO_InitStructure.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
GPIO_InitStructure.Speed = GPIO_SPEED_FREQ_LOW; // I2C is a KHz bus and low speed is still good into the low MHz
GPIO_InitStructure.Alternate = GPIO_AF4_I2C1;
HAL_GPIO_Init(GPIOB, &GPIO_InitStructure);
@ -42,39 +42,43 @@ void touch_init(void)
ensure(sectrue * (HAL_OK == HAL_I2C_Init(&i2c_handle)), NULL);
// PC5 capacitive touch panel module reset (RSTN)
// PC4 capacitive touch panel module (CTPM) interrupt (INT) input
//GPIO_InitStructure.Pin = GPIO_PIN_4;
//GPIO_InitStructure.Mode = GPIO_MODE_INPUT;
//GPIO_InitStructure.Pull = GPIO_PULLUP;
//GPIO_InitStructure.Speed = GPIO_SPEED_FREQ_LOW;
//GPIO_InitStructure.Alternate = 0;
//HAL_GPIO_Init(GPIOC, &GPIO_InitStructure);
// PC5 capacitive touch panel module (CTPM) reset (RSTN)
GPIO_InitStructure.Pin = GPIO_PIN_5;
GPIO_InitStructure.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStructure.Pull = GPIO_PULLUP;
GPIO_InitStructure.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
GPIO_InitStructure.Pull = GPIO_NOPULL;
GPIO_InitStructure.Speed = GPIO_SPEED_FREQ_LOW;
GPIO_InitStructure.Alternate = 0;
HAL_GPIO_Init(GPIOC, &GPIO_InitStructure);
// reset the touch panel by toggling the reset line (active low)
HAL_GPIO_WritePin(GPIOC, GPIO_PIN_5, GPIO_PIN_SET);
HAL_GPIO_WritePin(GPIOC, GPIO_PIN_5, GPIO_PIN_RESET); // set the pin value before driving it out
HAL_GPIO_Init(GPIOC, &GPIO_InitStructure); // switch the pin to be an output
// reset the touch panel by keeping its reset line low (active low) low for a minimum of 5ms
HAL_Delay(10); // being conservative, min is 5ms
HAL_GPIO_WritePin(GPIOC, GPIO_PIN_5, GPIO_PIN_RESET);
HAL_Delay(10); // being conservative, min is 5ms
HAL_GPIO_WritePin(GPIOC, GPIO_PIN_5, GPIO_PIN_SET);
HAL_Delay(310); // "Time of starting to report point after resetting" min is 300ms
}
HAL_GPIO_WritePin(GPIOC, GPIO_PIN_5, GPIO_PIN_SET); // release CTPM reset
HAL_Delay(310); // "Time of starting to report point after resetting" min is 300ms, giving an extra 10ms
#define TOUCH_ADDRESS (0x38U << 1) // the HAL requires the 7-bit address to be shifted by one bit
#define TOUCH_PACKET_SIZE 7U
#define EVENT_PRESS_DOWN 0x00U
#define EVENT_CONTACT 0x80U
#define EVENT_LIFT_UP 0x40U
#define EVENT_NO_EVENT 0xC0U
#define GESTURE_NO_GESTURE 0x00U
#define X_POS_MSB (touch_data[3] & 0xFU)
#define X_POS_LSB (touch_data[4])
#define Y_POS_MSB (touch_data[5] & 0xFU)
#define Y_POS_LSB (touch_data[6])
#define X_Y_POS ((X_POS_MSB << 20) | (X_POS_LSB << 12) | (Y_POS_MSB << 8) | (Y_POS_LSB))
// set register 0xA4 G_MODE to interrupt polling mode (0x00). basically, CTPM keeps this input line (to PC4) low while a finger is on the screen.
//uint8_t touch_panel_config[] = {0xA4, 0x00};
//ensure(sectrue * (HAL_OK == HAL_I2C_Master_Transmit(&i2c_handle, TOUCH_ADDRESS, touch_panel_config, sizeof(touch_panel_config), 10)), NULL);
}
uint32_t touch_read(void)
{
static uint8_t touch_data[TOUCH_PACKET_SIZE], previous_touch_data[TOUCH_PACKET_SIZE];
//const GPIO_PinState ctpm_interrupt_line = HAL_GPIO_ReadPin(GPIOC, GPIO_PIN_4);
uint8_t outgoing[] = {0x00}; // start reading from address 0x00
if (HAL_OK != HAL_I2C_Master_Transmit(&i2c_handle, TOUCH_ADDRESS, outgoing, sizeof(outgoing), 1)) {
return 0;
}
if (HAL_OK != HAL_I2C_Master_Receive(&i2c_handle, TOUCH_ADDRESS, touch_data, TOUCH_PACKET_SIZE, 1)) {
return 0; // read failure
}

17
embed/trezorhal/touch.h
View File

@ -5,8 +5,8 @@
* see LICENSE file for details
*/
#ifndef __TREZORHAL_TOUCH_H__
#define __TREZORHAL_TOUCH_H__
#ifndef TREZORHAL_TOUCH_H
#define TREZORHAL_TOUCH_H
#include <stdint.h>
@ -14,6 +14,19 @@
#define TOUCH_MOVE (2U << 24)
#define TOUCH_END (4U << 24)
#define TOUCH_ADDRESS (0x38U << 1) // the HAL requires the 7-bit address to be shifted by one bit
#define TOUCH_PACKET_SIZE 7U
#define EVENT_PRESS_DOWN 0x00U
#define EVENT_CONTACT 0x80U
#define EVENT_LIFT_UP 0x40U
#define EVENT_NO_EVENT 0xC0U
#define GESTURE_NO_GESTURE 0x00U
#define X_POS_MSB (touch_data[3] & 0xFU)
#define X_POS_LSB (touch_data[4])
#define Y_POS_MSB (touch_data[5] & 0xFU)
#define Y_POS_LSB (touch_data[6])
#define X_Y_POS ((X_POS_MSB << 20) | (X_POS_LSB << 12) | (Y_POS_MSB << 8) | (Y_POS_LSB))
void touch_init(void);
uint32_t touch_read(void);
uint32_t touch_click(void);