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/**
******************************************************************************
* @file stmpe811.c
* @author MCD Application Team
* @brief This file provides a set of functions needed to manage the STMPE811
* IO Expander devices.
******************************************************************************
* @attention
*
* Copyright (c) 2014 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "stmpe811.h"
/** @addtogroup BSP
* @{
*/
/** @addtogroup Components
* @{
*/
/** @defgroup STMPE811
* @{
*/
/** @defgroup STMPE811_Private_Types_Definitions
* @{
*/
/** @defgroup STMPE811_Private_Defines
* @{
*/
#define STMPE811_MAX_INSTANCE 2
/**
* @}
*/
/** @defgroup STMPE811_Private_Macros
* @{
*/
/**
* @}
*/
/** @defgroup STMPE811_Private_Variables
* @{
*/
/* Touch screen driver structure initialization */
TS_DrvTypeDef stmpe811_ts_drv =
{
stmpe811_Init,
stmpe811_ReadID,
stmpe811_Reset,
stmpe811_TS_Start,
stmpe811_TS_DetectTouch,
stmpe811_TS_GetXY,
stmpe811_TS_EnableIT,
stmpe811_TS_ClearIT,
stmpe811_TS_ITStatus,
stmpe811_TS_DisableIT,
};
/* IO driver structure initialization */
IO_DrvTypeDef stmpe811_io_drv =
{
stmpe811_Init,
stmpe811_ReadID,
stmpe811_Reset,
stmpe811_IO_Start,
stmpe811_IO_Config,
stmpe811_IO_WritePin,
stmpe811_IO_ReadPin,
stmpe811_IO_EnableIT,
stmpe811_IO_DisableIT,
stmpe811_IO_ITStatus,
stmpe811_IO_ClearIT,
};
/* stmpe811 instances by address */
uint8_t stmpe811[STMPE811_MAX_INSTANCE] = {0};
/**
* @}
*/
/** @defgroup STMPE811_Private_Function_Prototypes
* @{
*/
static uint8_t stmpe811_GetInstance(uint16_t DeviceAddr);
/**
* @}
*/
/** @defgroup STMPE811_Private_Functions
* @{
*/
/**
* @brief Initialize the stmpe811 and configure the needed hardware resources
* @param DeviceAddr: Device address on communication Bus.
* @retval None
*/
void stmpe811_Init(uint16_t DeviceAddr)
{
uint8_t instance;
uint8_t empty;
/* Check if device instance already exists */
instance = stmpe811_GetInstance(DeviceAddr);
/* To prevent double initialization */
if(instance == 0xFF)
{
/* Look for empty instance */
empty = stmpe811_GetInstance(0);
if(empty < STMPE811_MAX_INSTANCE)
{
/* Register the current device instance */
stmpe811[empty] = DeviceAddr;
/* Initialize IO BUS layer */
IOE_Init();
/* Generate stmpe811 Software reset */
stmpe811_Reset(DeviceAddr);
}
}
}
/**
* @brief Reset the stmpe811 by Software.
* @param DeviceAddr: Device address on communication Bus.
* @retval None
*/
void stmpe811_Reset(uint16_t DeviceAddr)
{
/* Power Down the stmpe811 */
IOE_Write(DeviceAddr, STMPE811_REG_SYS_CTRL1, 2);
/* Wait for a delay to ensure registers erasing */
IOE_Delay(10);
/* Power On the Codec after the power off => all registers are reinitialized */
IOE_Write(DeviceAddr, STMPE811_REG_SYS_CTRL1, 0);
/* Wait for a delay to ensure registers erasing */
IOE_Delay(2);
}
/**
* @brief Read the stmpe811 IO Expander device ID.
* @param DeviceAddr: Device address on communication Bus.
* @retval The Device ID (two bytes).
*/
uint16_t stmpe811_ReadID(uint16_t DeviceAddr)
{
/* Initialize IO BUS layer */
IOE_Init();
/* Return the device ID value */
return ((IOE_Read(DeviceAddr, STMPE811_REG_CHP_ID_LSB) << 8) |\
(IOE_Read(DeviceAddr, STMPE811_REG_CHP_ID_MSB)));
}
/**
* @brief Enable the Global interrupt.
* @param DeviceAddr: Device address on communication Bus.
* @retval None
*/
void stmpe811_EnableGlobalIT(uint16_t DeviceAddr)
{
uint8_t tmp = 0;
/* Read the Interrupt Control register */
tmp = IOE_Read(DeviceAddr, STMPE811_REG_INT_CTRL);
/* Set the global interrupts to be Enabled */
tmp |= (uint8_t)STMPE811_GIT_EN;
/* Write Back the Interrupt Control register */
IOE_Write(DeviceAddr, STMPE811_REG_INT_CTRL, tmp);
}
/**
* @brief Disable the Global interrupt.
* @param DeviceAddr: Device address on communication Bus.
* @retval None
*/
void stmpe811_DisableGlobalIT(uint16_t DeviceAddr)
{
uint8_t tmp = 0;
/* Read the Interrupt Control register */
tmp = IOE_Read(DeviceAddr, STMPE811_REG_INT_CTRL);
/* Set the global interrupts to be Disabled */
tmp &= ~(uint8_t)STMPE811_GIT_EN;
/* Write Back the Interrupt Control register */
IOE_Write(DeviceAddr, STMPE811_REG_INT_CTRL, tmp);
}
/**
* @brief Enable the interrupt mode for the selected IT source
* @param DeviceAddr: Device address on communication Bus.
* @param Source: The interrupt source to be configured, could be:
* @arg STMPE811_GIT_IO: IO interrupt
* @arg STMPE811_GIT_ADC : ADC interrupt
* @arg STMPE811_GIT_FE : Touch Screen Controller FIFO Error interrupt
* @arg STMPE811_GIT_FF : Touch Screen Controller FIFO Full interrupt
* @arg STMPE811_GIT_FOV : Touch Screen Controller FIFO Overrun interrupt
* @arg STMPE811_GIT_FTH : Touch Screen Controller FIFO Threshold interrupt
* @arg STMPE811_GIT_TOUCH : Touch Screen Controller Touch Detected interrupt
* @retval None
*/
void stmpe811_EnableITSource(uint16_t DeviceAddr, uint8_t Source)
{
uint8_t tmp = 0;
/* Get the current value of the INT_EN register */
tmp = IOE_Read(DeviceAddr, STMPE811_REG_INT_EN);
/* Set the interrupts to be Enabled */
tmp |= Source;
/* Set the register */
IOE_Write(DeviceAddr, STMPE811_REG_INT_EN, tmp);
}
/**
* @brief Disable the interrupt mode for the selected IT source
* @param DeviceAddr: Device address on communication Bus.
* @param Source: The interrupt source to be configured, could be:
* @arg STMPE811_GIT_IO: IO interrupt
* @arg STMPE811_GIT_ADC : ADC interrupt
* @arg STMPE811_GIT_FE : Touch Screen Controller FIFO Error interrupt
* @arg STMPE811_GIT_FF : Touch Screen Controller FIFO Full interrupt
* @arg STMPE811_GIT_FOV : Touch Screen Controller FIFO Overrun interrupt
* @arg STMPE811_GIT_FTH : Touch Screen Controller FIFO Threshold interrupt
* @arg STMPE811_GIT_TOUCH : Touch Screen Controller Touch Detected interrupt
* @retval None
*/
void stmpe811_DisableITSource(uint16_t DeviceAddr, uint8_t Source)
{
uint8_t tmp = 0;
/* Get the current value of the INT_EN register */
tmp = IOE_Read(DeviceAddr, STMPE811_REG_INT_EN);
/* Set the interrupts to be Enabled */
tmp &= ~Source;
/* Set the register */
IOE_Write(DeviceAddr, STMPE811_REG_INT_EN, tmp);
}
/**
* @brief Set the global interrupt Polarity.
* @param DeviceAddr: Device address on communication Bus.
* @param Polarity: the IT mode polarity, could be one of the following values:
* @arg STMPE811_POLARITY_LOW: Interrupt line is active Low/Falling edge
* @arg STMPE811_POLARITY_HIGH: Interrupt line is active High/Rising edge
* @retval None
*/
void stmpe811_SetITPolarity(uint16_t DeviceAddr, uint8_t Polarity)
{
uint8_t tmp = 0;
/* Get the current register value */
tmp = IOE_Read(DeviceAddr, STMPE811_REG_INT_CTRL);
/* Mask the polarity bits */
tmp &= ~(uint8_t)0x04;
/* Modify the Interrupt Output line configuration */
tmp |= Polarity;
/* Set the new register value */
IOE_Write(DeviceAddr, STMPE811_REG_INT_CTRL, tmp);
}
/**
* @brief Set the global interrupt Type.
* @param DeviceAddr: Device address on communication Bus.
* @param Type: Interrupt line activity type, could be one of the following values:
* @arg STMPE811_TYPE_LEVEL: Interrupt line is active in level model
* @arg STMPE811_TYPE_EDGE: Interrupt line is active in edge model
* @retval None
*/
void stmpe811_SetITType(uint16_t DeviceAddr, uint8_t Type)
{
uint8_t tmp = 0;
/* Get the current register value */
tmp = IOE_Read(DeviceAddr, STMPE811_REG_INT_CTRL);
/* Mask the type bits */
tmp &= ~(uint8_t)0x02;
/* Modify the Interrupt Output line configuration */
tmp |= Type;
/* Set the new register value */
IOE_Write(DeviceAddr, STMPE811_REG_INT_CTRL, tmp);
}
/**
* @brief Check the selected Global interrupt source pending bit
* @param DeviceAddr: Device address on communication Bus.
* @param Source: the Global interrupt source to be checked, could be:
* @arg STMPE811_GIT_IO: IO interrupt
* @arg STMPE811_GIT_ADC : ADC interrupt
* @arg STMPE811_GIT_FE : Touch Screen Controller FIFO Error interrupt
* @arg STMPE811_GIT_FF : Touch Screen Controller FIFO Full interrupt
* @arg STMPE811_GIT_FOV : Touch Screen Controller FIFO Overrun interrupt
* @arg STMPE811_GIT_FTH : Touch Screen Controller FIFO Threshold interrupt
* @arg STMPE811_GIT_TOUCH : Touch Screen Controller Touch Detected interrupt
* @retval The checked Global interrupt source status.
*/
uint8_t stmpe811_GlobalITStatus(uint16_t DeviceAddr, uint8_t Source)
{
/* Return the global IT source status */
return((IOE_Read(DeviceAddr, STMPE811_REG_INT_STA) & Source) == Source);
}
/**
* @brief Return the Global interrupts status
* @param DeviceAddr: Device address on communication Bus.
* @param Source: the Global interrupt source to be checked, could be:
* @arg STMPE811_GIT_IO: IO interrupt
* @arg STMPE811_GIT_ADC : ADC interrupt
* @arg STMPE811_GIT_FE : Touch Screen Controller FIFO Error interrupt
* @arg STMPE811_GIT_FF : Touch Screen Controller FIFO Full interrupt
* @arg STMPE811_GIT_FOV : Touch Screen Controller FIFO Overrun interrupt
* @arg STMPE811_GIT_FTH : Touch Screen Controller FIFO Threshold interrupt
* @arg STMPE811_GIT_TOUCH : Touch Screen Controller Touch Detected interrupt
* @retval The checked Global interrupt source status.
*/
uint8_t stmpe811_ReadGITStatus(uint16_t DeviceAddr, uint8_t Source)
{
/* Return the global IT source status */
return((IOE_Read(DeviceAddr, STMPE811_REG_INT_STA) & Source));
}
/**
* @brief Clear the selected Global interrupt pending bit(s)
* @param DeviceAddr: Device address on communication Bus.
* @param Source: the Global interrupt source to be cleared, could be any combination
* of the following values:
* @arg STMPE811_GIT_IO: IO interrupt
* @arg STMPE811_GIT_ADC : ADC interrupt
* @arg STMPE811_GIT_FE : Touch Screen Controller FIFO Error interrupt
* @arg STMPE811_GIT_FF : Touch Screen Controller FIFO Full interrupt
* @arg STMPE811_GIT_FOV : Touch Screen Controller FIFO Overrun interrupt
* @arg STMPE811_GIT_FTH : Touch Screen Controller FIFO Threshold interrupt
* @arg STMPE811_GIT_TOUCH : Touch Screen Controller Touch Detected interrupt
* @retval None
*/
void stmpe811_ClearGlobalIT(uint16_t DeviceAddr, uint8_t Source)
{
/* Write 1 to the bits that have to be cleared */
IOE_Write(DeviceAddr, STMPE811_REG_INT_STA, Source);
}
/**
* @brief Start the IO functionality use and disable the AF for selected IO pin(s).
* @param DeviceAddr: Device address on communication Bus.
* @param IO_Pin: The IO pin(s) to put in AF. This parameter can be one
* of the following values:
* @arg STMPE811_PIN_x: where x can be from 0 to 7.
* @retval None
*/
void stmpe811_IO_Start(uint16_t DeviceAddr, uint32_t IO_Pin)
{
uint8_t mode;
/* Get the current register value */
mode = IOE_Read(DeviceAddr, STMPE811_REG_SYS_CTRL2);
/* Set the Functionalities to be Disabled */
mode &= ~(STMPE811_IO_FCT | STMPE811_ADC_FCT);
/* Write the new register value */
IOE_Write(DeviceAddr, STMPE811_REG_SYS_CTRL2, mode);
/* Disable AF for the selected IO pin(s) */
stmpe811_IO_DisableAF(DeviceAddr, (uint8_t)IO_Pin);
}
/**
* @brief Configures the IO pin(s) according to IO mode structure value.
* @param DeviceAddr: Device address on communication Bus.
* @param IO_Pin: The output pin to be set or reset. This parameter can be one
* of the following values:
* @arg STMPE811_PIN_x: where x can be from 0 to 7.
* @param IO_Mode: The IO pin mode to configure, could be one of the following values:
* @arg IO_MODE_INPUT
* @arg IO_MODE_OUTPUT
* @arg IO_MODE_IT_RISING_EDGE
* @arg IO_MODE_IT_FALLING_EDGE
* @arg IO_MODE_IT_LOW_LEVEL
* @arg IO_MODE_IT_HIGH_LEVEL
* @retval 0 if no error, IO_Mode if error
*/
uint8_t stmpe811_IO_Config(uint16_t DeviceAddr, uint32_t IO_Pin, IO_ModeTypedef IO_Mode)
{
uint8_t error_code = 0;
/* Configure IO pin according to selected IO mode */
switch(IO_Mode)
{
case IO_MODE_INPUT: /* Input mode */
stmpe811_IO_InitPin(DeviceAddr, IO_Pin, STMPE811_DIRECTION_IN);
break;
case IO_MODE_OUTPUT: /* Output mode */
stmpe811_IO_InitPin(DeviceAddr, IO_Pin, STMPE811_DIRECTION_OUT);
break;
case IO_MODE_IT_RISING_EDGE: /* Interrupt rising edge mode */
stmpe811_IO_EnableIT(DeviceAddr);
stmpe811_IO_EnablePinIT(DeviceAddr, IO_Pin);
stmpe811_IO_InitPin(DeviceAddr, IO_Pin, STMPE811_DIRECTION_IN);
stmpe811_SetITType(DeviceAddr, STMPE811_TYPE_EDGE);
stmpe811_IO_SetEdgeMode(DeviceAddr, IO_Pin, STMPE811_EDGE_RISING);
break;
case IO_MODE_IT_FALLING_EDGE: /* Interrupt falling edge mode */
stmpe811_IO_EnableIT(DeviceAddr);
stmpe811_IO_EnablePinIT(DeviceAddr, IO_Pin);
stmpe811_IO_InitPin(DeviceAddr, IO_Pin, STMPE811_DIRECTION_IN);
stmpe811_SetITType(DeviceAddr, STMPE811_TYPE_EDGE);
stmpe811_IO_SetEdgeMode(DeviceAddr, IO_Pin, STMPE811_EDGE_FALLING);
break;
case IO_MODE_IT_LOW_LEVEL: /* Low level interrupt mode */
stmpe811_IO_EnableIT(DeviceAddr);
stmpe811_IO_EnablePinIT(DeviceAddr, IO_Pin);
stmpe811_IO_InitPin(DeviceAddr, IO_Pin, STMPE811_DIRECTION_IN);
stmpe811_SetITType(DeviceAddr, STMPE811_TYPE_LEVEL);
stmpe811_SetITPolarity(DeviceAddr, STMPE811_POLARITY_LOW);
break;
case IO_MODE_IT_HIGH_LEVEL: /* High level interrupt mode */
stmpe811_IO_EnableIT(DeviceAddr);
stmpe811_IO_EnablePinIT(DeviceAddr, IO_Pin);
stmpe811_IO_InitPin(DeviceAddr, IO_Pin, STMPE811_DIRECTION_IN);
stmpe811_SetITType(DeviceAddr, STMPE811_TYPE_LEVEL);
stmpe811_SetITPolarity(DeviceAddr, STMPE811_POLARITY_HIGH);
break;
default:
error_code = (uint8_t) IO_Mode;
break;
}
return error_code;
}
/**
* @brief Initialize the selected IO pin direction.
* @param DeviceAddr: Device address on communication Bus.
* @param IO_Pin: The IO pin to be configured. This parameter could be any
* combination of the following values:
* @arg STMPE811_PIN_x: Where x can be from 0 to 7.
* @param Direction: could be STMPE811_DIRECTION_IN or STMPE811_DIRECTION_OUT.
* @retval None
*/
void stmpe811_IO_InitPin(uint16_t DeviceAddr, uint32_t IO_Pin, uint8_t Direction)
{
uint8_t tmp = 0;
/* Get all the Pins direction */
tmp = IOE_Read(DeviceAddr, STMPE811_REG_IO_DIR);
/* Set the selected pin direction */
if (Direction != STMPE811_DIRECTION_IN)
{
tmp |= (uint8_t)IO_Pin;
}
else
{
tmp &= ~(uint8_t)IO_Pin;
}
/* Write the register new value */
IOE_Write(DeviceAddr, STMPE811_REG_IO_DIR, tmp);
}
/**
* @brief Disable the AF for the selected IO pin(s).
* @param DeviceAddr: Device address on communication Bus.
* @param IO_Pin: The IO pin to be configured. This parameter could be any
* combination of the following values:
* @arg STMPE811_PIN_x: Where x can be from 0 to 7.
* @retval None
*/
void stmpe811_IO_DisableAF(uint16_t DeviceAddr, uint32_t IO_Pin)
{
uint8_t tmp = 0;
/* Get the current state of the IO_AF register */
tmp = IOE_Read(DeviceAddr, STMPE811_REG_IO_AF);
/* Enable the selected pins alternate function */
tmp |= (uint8_t)IO_Pin;
/* Write back the new value in IO AF register */
IOE_Write(DeviceAddr, STMPE811_REG_IO_AF, tmp);
}
/**
* @brief Enable the AF for the selected IO pin(s).
* @param DeviceAddr: Device address on communication Bus.
* @param IO_Pin: The IO pin to be configured. This parameter could be any
* combination of the following values:
* @arg STMPE811_PIN_x: Where x can be from 0 to 7.
* @retval None
*/
void stmpe811_IO_EnableAF(uint16_t DeviceAddr, uint32_t IO_Pin)
{
uint8_t tmp = 0;
/* Get the current register value */
tmp = IOE_Read(DeviceAddr, STMPE811_REG_IO_AF);
/* Enable the selected pins alternate function */
tmp &= ~(uint8_t)IO_Pin;
/* Write back the new register value */
IOE_Write(DeviceAddr, STMPE811_REG_IO_AF, tmp);
}
/**
* @brief Configure the Edge for which a transition is detectable for the
* selected pin.
* @param DeviceAddr: Device address on communication Bus.
* @param IO_Pin: The IO pin to be configured. This parameter could be any
* combination of the following values:
* @arg STMPE811_PIN_x: Where x can be from 0 to 7.
* @param Edge: The edge which will be detected. This parameter can be one or
* a combination of following values: STMPE811_EDGE_FALLING and STMPE811_EDGE_RISING .
* @retval None
*/
void stmpe811_IO_SetEdgeMode(uint16_t DeviceAddr, uint32_t IO_Pin, uint8_t Edge)
{
uint8_t tmp1 = 0, tmp2 = 0;
/* Get the current registers values */
tmp1 = IOE_Read(DeviceAddr, STMPE811_REG_IO_FE);
tmp2 = IOE_Read(DeviceAddr, STMPE811_REG_IO_RE);
/* Disable the Falling Edge */
tmp1 &= ~(uint8_t)IO_Pin;
/* Disable the Falling Edge */
tmp2 &= ~(uint8_t)IO_Pin;
/* Enable the Falling edge if selected */
if (Edge & STMPE811_EDGE_FALLING)
{
tmp1 |= (uint8_t)IO_Pin;
}
/* Enable the Rising edge if selected */
if (Edge & STMPE811_EDGE_RISING)
{
tmp2 |= (uint8_t)IO_Pin;
}
/* Write back the new registers values */
IOE_Write(DeviceAddr, STMPE811_REG_IO_FE, tmp1);
IOE_Write(DeviceAddr, STMPE811_REG_IO_RE, tmp2);
}
/**
* @brief Write a new IO pin state.
* @param DeviceAddr: Device address on communication Bus.
* @param IO_Pin: The output pin to be set or reset. This parameter can be one
* of the following values:
* @arg STMPE811_PIN_x: where x can be from 0 to 7.
* @param PinState: The new IO pin state.
* @retval None
*/
void stmpe811_IO_WritePin(uint16_t DeviceAddr, uint32_t IO_Pin, uint8_t PinState)
{
/* Apply the bit value to the selected pin */
if (PinState != 0)
{
/* Set the register */
IOE_Write(DeviceAddr, STMPE811_REG_IO_SET_PIN, (uint8_t)IO_Pin);
}
else
{
/* Set the register */
IOE_Write(DeviceAddr, STMPE811_REG_IO_CLR_PIN, (uint8_t)IO_Pin);
}
}
/**
* @brief Return the state of the selected IO pin(s).
* @param DeviceAddr: Device address on communication Bus.
* @param IO_Pin: The output pin to be set or reset. This parameter can be one
* of the following values:
* @arg STMPE811_PIN_x: where x can be from 0 to 7.
* @retval IO pin(s) state.
*/
uint32_t stmpe811_IO_ReadPin(uint16_t DeviceAddr, uint32_t IO_Pin)
{
return((uint32_t)(IOE_Read(DeviceAddr, STMPE811_REG_IO_MP_STA) & (uint8_t)IO_Pin));
}
/**
* @brief Enable the global IO interrupt source.
* @param DeviceAddr: Device address on communication Bus.
* @retval None
*/
void stmpe811_IO_EnableIT(uint16_t DeviceAddr)
{
IOE_ITConfig();
/* Enable global IO IT source */
stmpe811_EnableITSource(DeviceAddr, STMPE811_GIT_IO);
/* Enable global interrupt */
stmpe811_EnableGlobalIT(DeviceAddr);
}
/**
* @brief Disable the global IO interrupt source.
* @param DeviceAddr: Device address on communication Bus.
* @retval None
*/
void stmpe811_IO_DisableIT(uint16_t DeviceAddr)
{
/* Disable the global interrupt */
stmpe811_DisableGlobalIT(DeviceAddr);
/* Disable global IO IT source */
stmpe811_DisableITSource(DeviceAddr, STMPE811_GIT_IO);
}
/**
* @brief Enable interrupt mode for the selected IO pin(s).
* @param DeviceAddr: Device address on communication Bus.
* @param IO_Pin: The IO interrupt to be enabled. This parameter could be any
* combination of the following values:
* @arg STMPE811_PIN_x: where x can be from 0 to 7.
* @retval None
*/
void stmpe811_IO_EnablePinIT(uint16_t DeviceAddr, uint32_t IO_Pin)
{
uint8_t tmp = 0;
/* Get the IO interrupt state */
tmp = IOE_Read(DeviceAddr, STMPE811_REG_IO_INT_EN);
/* Set the interrupts to be enabled */
tmp |= (uint8_t)IO_Pin;
/* Write the register new value */
IOE_Write(DeviceAddr, STMPE811_REG_IO_INT_EN, tmp);
}
/**
* @brief Disable interrupt mode for the selected IO pin(s).
* @param DeviceAddr: Device address on communication Bus.
* @param IO_Pin: The IO interrupt to be disabled. This parameter could be any
* combination of the following values:
* @arg STMPE811_PIN_x: where x can be from 0 to 7.
* @retval None
*/
void stmpe811_IO_DisablePinIT(uint16_t DeviceAddr, uint32_t IO_Pin)
{
uint8_t tmp = 0;
/* Get the IO interrupt state */
tmp = IOE_Read(DeviceAddr, STMPE811_REG_IO_INT_EN);
/* Set the interrupts to be Disabled */
tmp &= ~(uint8_t)IO_Pin;
/* Write the register new value */
IOE_Write(DeviceAddr, STMPE811_REG_IO_INT_EN, tmp);
}
/**
* @brief Check the status of the selected IO interrupt pending bit
* @param DeviceAddr: Device address on communication Bus.
* @param IO_Pin: The IO interrupt to be checked could be:
* @arg STMPE811_PIN_x Where x can be from 0 to 7.
* @retval Status of the checked IO pin(s).
*/
uint32_t stmpe811_IO_ITStatus(uint16_t DeviceAddr, uint32_t IO_Pin)
{
/* Get the Interrupt status */
return(IOE_Read(DeviceAddr, STMPE811_REG_IO_INT_STA) & (uint8_t)IO_Pin);
}
/**
* @brief Clear the selected IO interrupt pending bit(s).
* @param DeviceAddr: Device address on communication Bus.
* @param IO_Pin: the IO interrupt to be cleared, could be:
* @arg STMPE811_PIN_x: Where x can be from 0 to 7.
* @retval None
*/
void stmpe811_IO_ClearIT(uint16_t DeviceAddr, uint32_t IO_Pin)
{
/* Clear the global IO IT pending bit */
stmpe811_ClearGlobalIT(DeviceAddr, STMPE811_GIT_IO);
/* Clear the IO IT pending bit(s) */
IOE_Write(DeviceAddr, STMPE811_REG_IO_INT_STA, (uint8_t)IO_Pin);
/* Clear the Edge detection pending bit*/
IOE_Write(DeviceAddr, STMPE811_REG_IO_ED, (uint8_t)IO_Pin);
/* Clear the Rising edge pending bit */
IOE_Write(DeviceAddr, STMPE811_REG_IO_RE, (uint8_t)IO_Pin);
/* Clear the Falling edge pending bit */
IOE_Write(DeviceAddr, STMPE811_REG_IO_FE, (uint8_t)IO_Pin);
}
/**
* @brief Configures the touch Screen Controller (Single point detection)
* @param DeviceAddr: Device address on communication Bus.
* @retval None.
*/
void stmpe811_TS_Start(uint16_t DeviceAddr)
{
uint8_t mode;
/* Get the current register value */
mode = IOE_Read(DeviceAddr, STMPE811_REG_SYS_CTRL2);
/* Set the Functionalities to be Enabled */
mode &= ~(STMPE811_IO_FCT);
/* Write the new register value */
IOE_Write(DeviceAddr, STMPE811_REG_SYS_CTRL2, mode);
/* Select TSC pins in TSC alternate mode */
stmpe811_IO_EnableAF(DeviceAddr, STMPE811_TOUCH_IO_ALL);
/* Set the Functionalities to be Enabled */
mode &= ~(STMPE811_TS_FCT | STMPE811_ADC_FCT);
/* Set the new register value */
IOE_Write(DeviceAddr, STMPE811_REG_SYS_CTRL2, mode);
/* Select Sample Time, bit number and ADC Reference */
IOE_Write(DeviceAddr, STMPE811_REG_ADC_CTRL1, 0x49);
/* Wait for 2 ms */
IOE_Delay(2);
/* Select the ADC clock speed: 3.25 MHz */
IOE_Write(DeviceAddr, STMPE811_REG_ADC_CTRL2, 0x01);
/* Select 2 nF filter capacitor */
/* Configuration:
- Touch average control : 4 samples
- Touch delay time : 500 uS
- Panel driver setting time: 500 uS
*/
IOE_Write(DeviceAddr, STMPE811_REG_TSC_CFG, 0x9A);
/* Configure the Touch FIFO threshold: single point reading */
IOE_Write(DeviceAddr, STMPE811_REG_FIFO_TH, 0x01);
/* Clear the FIFO memory content. */
IOE_Write(DeviceAddr, STMPE811_REG_FIFO_STA, 0x01);
/* Put the FIFO back into operation mode */
IOE_Write(DeviceAddr, STMPE811_REG_FIFO_STA, 0x00);
/* Set the range and accuracy pf the pressure measurement (Z) :
- Fractional part :7
- Whole part :1
*/
IOE_Write(DeviceAddr, STMPE811_REG_TSC_FRACT_XYZ, 0x01);
/* Set the driving capability (limit) of the device for TSC pins: 50mA */
IOE_Write(DeviceAddr, STMPE811_REG_TSC_I_DRIVE, 0x01);
/* Touch screen control configuration (enable TSC):
- No window tracking index
- XYZ acquisition mode
*/
IOE_Write(DeviceAddr, STMPE811_REG_TSC_CTRL, 0x01);
/* Clear all the status pending bits if any */
IOE_Write(DeviceAddr, STMPE811_REG_INT_STA, 0xFF);
/* Wait for 2 ms delay */
IOE_Delay(2);
}
/**
* @brief Return if there is touch detected or not.
* @param DeviceAddr: Device address on communication Bus.
* @retval Touch detected state.
*/
uint8_t stmpe811_TS_DetectTouch(uint16_t DeviceAddr)
{
uint8_t state;
uint8_t ret = 0;
state = ((IOE_Read(DeviceAddr, STMPE811_REG_TSC_CTRL) & (uint8_t)STMPE811_TS_CTRL_STATUS) == (uint8_t)STMPE811_TS_CTRL_STATUS);
if(state > 0)
{
if(IOE_Read(DeviceAddr, STMPE811_REG_FIFO_SIZE) > 0)
{
ret = 1;
}
}
else
{
/* Reset FIFO */
IOE_Write(DeviceAddr, STMPE811_REG_FIFO_STA, 0x01);
/* Enable the FIFO again */
IOE_Write(DeviceAddr, STMPE811_REG_FIFO_STA, 0x00);
}
return ret;
}
/**
* @brief Get the touch screen X and Y positions values
* @param DeviceAddr: Device address on communication Bus.
* @param X: Pointer to X position value
* @param Y: Pointer to Y position value
* @retval None.
*/
void stmpe811_TS_GetXY(uint16_t DeviceAddr, uint16_t *X, uint16_t *Y)
{
uint8_t dataXYZ[4];
uint32_t uldataXYZ;
IOE_ReadMultiple(DeviceAddr, STMPE811_REG_TSC_DATA_NON_INC, dataXYZ, sizeof(dataXYZ)) ;
/* Calculate positions values */
uldataXYZ = (dataXYZ[0] << 24)|(dataXYZ[1] << 16)|(dataXYZ[2] << 8)|(dataXYZ[3] << 0);
*X = (uldataXYZ >> 20) & 0x00000FFF;
*Y = (uldataXYZ >> 8) & 0x00000FFF;
/* Reset FIFO */
IOE_Write(DeviceAddr, STMPE811_REG_FIFO_STA, 0x01);
/* Enable the FIFO again */
IOE_Write(DeviceAddr, STMPE811_REG_FIFO_STA, 0x00);
}
/**
* @brief Configure the selected source to generate a global interrupt or not
* @param DeviceAddr: Device address on communication Bus.
* @retval None
*/
void stmpe811_TS_EnableIT(uint16_t DeviceAddr)
{
IOE_ITConfig();
/* Enable global TS IT source */
stmpe811_EnableITSource(DeviceAddr, STMPE811_TS_IT);
/* Enable global interrupt */
stmpe811_EnableGlobalIT(DeviceAddr);
}
/**
* @brief Configure the selected source to generate a global interrupt or not
* @param DeviceAddr: Device address on communication Bus.
* @retval None
*/
void stmpe811_TS_DisableIT(uint16_t DeviceAddr)
{
/* Disable global interrupt */
stmpe811_DisableGlobalIT(DeviceAddr);
/* Disable global TS IT source */
stmpe811_DisableITSource(DeviceAddr, STMPE811_TS_IT);
}
/**
* @brief Configure the selected source to generate a global interrupt or not
* @param DeviceAddr: Device address on communication Bus.
* @retval TS interrupts status
*/
uint8_t stmpe811_TS_ITStatus(uint16_t DeviceAddr)
{
/* Return TS interrupts status */
return(stmpe811_ReadGITStatus(DeviceAddr, STMPE811_TS_IT));
}
/**
* @brief Configure the selected source to generate a global interrupt or not
* @param DeviceAddr: Device address on communication Bus.
* @retval None
*/
void stmpe811_TS_ClearIT(uint16_t DeviceAddr)
{
/* Clear the global TS IT source */
stmpe811_ClearGlobalIT(DeviceAddr, STMPE811_TS_IT);
}
/**
* @brief Check if the device instance of the selected address is already registered
* and return its index
* @param DeviceAddr: Device address on communication Bus.
* @retval Index of the device instance if registered, 0xFF if not.
*/
static uint8_t stmpe811_GetInstance(uint16_t DeviceAddr)
{
uint8_t idx = 0;
/* Check all the registered instances */
for(idx = 0; idx < STMPE811_MAX_INSTANCE ; idx ++)
{
if(stmpe811[idx] == DeviceAddr)
{
return idx;
}
}
return 0xFF;
}
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/
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