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/*
* This file is subject to the terms of the GFX License. If a copy of
* the license was not distributed with this file, you can obtain one at:
*
* http://chibios-gfx.com/license.html
*/
/**
* @file drivers/ginput/touch/STMPE811/ginput_lld_mouse_board_embest_dmstf4bb.h
* @brief GINPUT Touch low level driver source for the STMPE811 on the Embest DM-STF4BB board.
*
* @defgroup Mouse Mouse
* @ingroup GINPUT
* @{
*/
#ifndef _GINPUT_LLD_MOUSE_BOARD_H
#define _GINPUT_LLD_MOUSE_BOARD_H
static const I2CConfig i2ccfg = {
OPMODE_I2C,
400000,
FAST_DUTY_CYCLE_2,
};
/**
* @brief Initialise the board for the touch.
*
* @notapi
*/
static void init_board(void)
{
palSetPadMode(GPIOC, 13, PAL_MODE_INPUT | PAL_STM32_PUDR_FLOATING); /* TP IRQ */
palSetPadMode(GPIOB, 8, PAL_MODE_ALTERNATE(4) | PAL_STM32_OTYPE_OPENDRAIN); /* SCL */
palSetPadMode(GPIOB, 9, PAL_MODE_ALTERNATE(4) | PAL_STM32_OTYPE_OPENDRAIN); /* SDA */
i2cStart(&I2CD1, &i2ccfg);
}
/**
* @brief Check whether an interrupt is raised
* @return TRUE if there is an interrupt signal present
*
* @notapi
*/
static inline bool_t getpin_irq(void) {
return (!(palReadPad(GPIOC, 13)));
}
/**
* @brief Write a value into a certain register
*
* @param[in] reg The register address
* @param[in] n The amount of bytes (one or two)
* @param[in] val The value
*
* @notapi
*/
static void write_reg(uint8_t reg, uint8_t n, uint16_t val)
{
uint8_t txbuf[3];
i2cAcquireBus(&I2CD1);
txbuf[0] = reg;
if (n == 1) {
txbuf[1] = val;
i2cMasterTransmitTimeout(&I2CD1, STMPE811_ADDR, txbuf, 2, NULL, 0, MS2ST(STMPE811_TIMEOUT));
} else if (n == 2) {
txbuf[1] = ((val & 0xFF00) >> 8);
txbuf[2] = (val & 0x00FF);
i2cMasterTransmitTimeout(&I2CD1, STMPE811_ADDR, txbuf, 3, NULL, 0, MS2ST(STMPE811_TIMEOUT));
}
i2cReleaseBus(&I2CD1);
}
/**
* @brief Read the value of a certain register
*
* @param[in] reg The register address
* @param[in] n The amount of bytes (one or two)
*
* @return Data read from device (one byte or two depending on n param)
*
* @notapi
*/
static uint16_t read_reg(uint8_t reg, uint8_t n)
{
uint8_t txbuf[1], rxbuf[2];
uint16_t ret;
rxbuf[0] = 0;
rxbuf[1] = 0;
i2cAcquireBus(&I2CD1);
txbuf[0] = reg;
i2cMasterTransmitTimeout(&I2CD1, STMPE811_ADDR, txbuf, 1, rxbuf, n, MS2ST(STMPE811_TIMEOUT));
if (n == 1) {
ret = rxbuf[0];
} else if (n == 2) {
ret = ((rxbuf[0] << 8) | (rxbuf[1] & 0xFF));
}
i2cReleaseBus(&I2CD1);
return ret;
}
static void read_reg_n(uint8_t reg, uint8_t n, uint8_t *rxbuf)
{
uint8_t txbuf[1];
i2cAcquireBus(&I2CD1);
txbuf[0] = reg;
i2cMasterTransmitTimeout(&I2CD1, STMPE811_ADDR, txbuf, 1, rxbuf, n, MS2ST(STMPE811_TIMEOUT));
i2cReleaseBus(&I2CD1);
}
#endif /* _GINPUT_LLD_MOUSE_BOARD_H */
/** @} */
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