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/**
******************************************************************************
* @file stmpe1600.c
* @author MCD Application Team
* @brief This file provides a set of functions needed to manage the STMPE1600
* IO Expander devices.
******************************************************************************
* @attention
*
* Copyright (c) 2015 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 "stmpe1600.h"
/** @addtogroup BSP
* @{
*/
/** @addtogroup Components
* @{
*/
/** @defgroup STMPE1600
* @{
*/
/* Private typedef -----------------------------------------------------------*/
/** @defgroup STMPE1600_Private_Types_Definitions
* @{
*/
/* Private define ------------------------------------------------------------*/
/** @defgroup STMPE1600_Private_Defines
* @{
*/
#define STMPE1600_MAX_INSTANCE 2
/* Private macro -------------------------------------------------------------*/
/** @defgroup STMPE1600_Private_Macros
* @{
*/
/* Private variables ---------------------------------------------------------*/
static uint16_t tmp = 0;
/** @defgroup STMPE1600_Private_Variables
* @{
*/
/* IO driver structure initialization */
IO_DrvTypeDef stmpe1600_io_drv =
{
stmpe1600_Init,
stmpe1600_ReadID,
stmpe1600_Reset,
stmpe1600_Start,
stmpe1600_IO_Config,
stmpe1600_IO_WritePin,
stmpe1600_IO_ReadPin,
0,
0,
stmpe1600_IO_ITStatus,
stmpe1600_IO_ClearIT,
};
uint8_t stmpe1600[STMPE1600_MAX_INSTANCE] = {0};
/**
* @}
*/
/* Private function prototypes -----------------------------------------------*/
/** @defgroup STMPE1600_Private_Function_Prototypes
* @{
*/
static uint8_t stmpe1600_GetInstance(uint16_t DeviceAddr);
/* Private functions ---------------------------------------------------------*/
/** @defgroup STMPE1600_Private_Functions
* @{
*/
/**
* @brief Initialize the stmpe1600 and configure the needed hardware resources
* @param DeviceAddr: Device address on communication Bus.
* @retval None
*/
void stmpe1600_Init(uint16_t DeviceAddr)
{
uint8_t instance;
uint8_t empty;
/* Check if device instance already exists */
instance = stmpe1600_GetInstance(DeviceAddr);
if(instance == 0xFF)
{
/* Look for empty instance */
empty = stmpe1600_GetInstance(0);
if(empty < STMPE1600_MAX_INSTANCE)
{
/* Register the current device instance */
stmpe1600[empty] = DeviceAddr;
/* Initialize IO BUS layer */
IOE_Init();
/* Generate stmpe1600 Software reset */
stmpe1600_Reset(DeviceAddr);
}
}
}
/**
* @brief Configures the touch Screen Controller (Single point detection)
* @param DeviceAddr: Device address on communication Bus.
* @retval None.
*/
void stmpe1600_Start(uint16_t DeviceAddr, uint32_t IO_Pin)
{
/*Configuration already done during the initialization */
}
/**
* @brief Reset the stmpe1600 by Software.
* @param DeviceAddr: Device address on communication Bus.
* @retval None
*/
void stmpe1600_Reset(uint16_t DeviceAddr)
{
/* Power Down the stmpe1600 */
IOE_Write(DeviceAddr, STMPE1600_REG_SYS_CTRL, (uint16_t)0x80);
/* Wait for a delay to ensure registers erasing */
IOE_Delay(2);
/* Power On the Codec after the power off: all registers are reinitialized */
IOE_Write(DeviceAddr, STMPE1600_REG_SYS_CTRL, (uint16_t)0x00);
/* Wait for a delay to ensure registers erasing */
IOE_Delay(2);
}
/**
* @brief Read the stmpe1600 device ID.
* @param DeviceAddr: Device address on communication Bus.
* @retval The Device ID (two bytes).
*/
uint16_t stmpe1600_ReadID(uint16_t DeviceAddr)
{
uint8_t tmpData[2] = {0 , 0};
/* Initialize IO BUS layer */
IOE_Init();
/* Read the stmpe1600 device ID */
IOE_ReadMultiple(DeviceAddr, STMPE1600_REG_CHP_ID, tmpData, 2);
/* Return the device ID value */
return((uint16_t)tmpData[0] | (((uint16_t)tmpData[1]) << 8));
}
/**
* @brief Set the global interrupt Polarity.
* @param DeviceAddr: Device address on communication Bus.
* @param Polarity: could be one of these values;
* @arg STMPE1600_POLARITY_LOW: Interrupt line is active Low/Falling edge
* @arg STMPE1600_POLARITY_HIGH: Interrupt line is active High/Rising edge
* @retval None
*/
void stmpe1600_SetITPolarity(uint16_t DeviceAddr, uint8_t Polarity)
{
uint8_t tmp = 0;
/* Get the current register value */
tmp = IOE_Read(DeviceAddr, STMPE1600_REG_SYS_CTRL);
/* Mask the polarity bit */
tmp &= ~(uint16_t)0x01;
/* Set the Interrupt Output line polarity */
tmp |= (uint8_t)Polarity;
/* Set the new register value */
IOE_Write(DeviceAddr, STMPE1600_REG_SYS_CTRL, tmp);
}
/**
* @brief Enable the Global interrupt.
* @param DeviceAddr: Device address on communication Bus.
* @retval None
*/
void stmpe1600_EnableGlobalIT(uint16_t DeviceAddr)
{
uint8_t tmpData[2] = {0 , 0};
/* Configure NVIC IT for IOE */
IOE_ITConfig();
/* Get the current register value */
IOE_ReadMultiple(DeviceAddr, STMPE1600_REG_SYS_CTRL, tmpData, 2);
tmp = ((uint16_t)tmpData[0] | (((uint16_t)tmpData[1]) << 8));
/* Set the global interrupts to be Enabled */
tmp |= (uint16_t)STMPE1600_IT_ENABLE;
/* Write Back the Interrupt Control register */
IOE_WriteMultiple(DeviceAddr, STMPE1600_REG_SYS_CTRL, (uint8_t *)&tmp, 2);
}
/**
* @brief Disable the Global interrupt.
* @param DeviceAddr: Device address on communication Bus.
* @retval None
*/
void stmpe1600_DisableGlobalIT(uint16_t DeviceAddr)
{
uint8_t tmpData[2] = {0 , 0};
/* Get the current register value */
IOE_ReadMultiple(DeviceAddr, STMPE1600_REG_SYS_CTRL, tmpData, 2);
tmp = ((uint16_t)tmpData[0] | (((uint16_t)tmpData[1]) << 8));
/* Set the global interrupts to be Enabled */
tmp &= ~(uint16_t)STMPE1600_IT_ENABLE;
/* Write Back the Interrupt Control register */
IOE_WriteMultiple(DeviceAddr, STMPE1600_REG_SYS_CTRL, (uint8_t *)&tmp, 2);
}
/**
* @brief Initialize the selected pin(s) direction.
* @param DeviceAddr: Device address on communication Bus.
* @param IO_Pin: IO pin(s) to be configured.
* This parameter could be any combination of the following values:
* @arg STMPE1600_PIN_x: where x can be from 0 to 15.
* @param Direction: could be STMPE1600_DIRECTION_IN or STMPE1600_DIRECTION_OUT.
* @retval None
*/
void stmpe1600_IO_InitPin(uint16_t DeviceAddr, uint32_t IO_Pin, uint8_t Direction)
{
uint8_t tmpData[2] = {0 , 0};
/* Get the current register value */
IOE_ReadMultiple(DeviceAddr, STMPE1600_REG_GPDR, tmpData, 2);
tmp = ((uint16_t)tmpData[0] | (((uint16_t)tmpData[1]) << 8));
/* Set the Pin direction */
if (Direction != STMPE1600_DIRECTION_IN)
{
tmp |= (uint16_t)IO_Pin;
}
else
{
tmp &= ~(uint16_t)IO_Pin;
}
/* Set the new register value */
IOE_WriteMultiple(DeviceAddr, STMPE1600_REG_GPDR, (uint8_t *)&tmp, 2);
}
/**
* @brief Configure 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 STMPE1600_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
* @retval 0 if no error, IO_Mode if error
*/
uint8_t stmpe1600_IO_Config(uint16_t DeviceAddr, uint32_t IO_Pin, IO_ModeTypedef IO_Mode)
{
uint8_t error_code = 0;
uint8_t buffer[2] = {0,0};
/* Configure IO pin according to selected IO mode */
switch(IO_Mode)
{
case IO_MODE_INPUT: /* Input mode */
stmpe1600_IO_DisablePinIT(DeviceAddr, IO_Pin);
stmpe1600_IO_InitPin(DeviceAddr, IO_Pin, STMPE1600_DIRECTION_IN);
break;
case IO_MODE_OUTPUT: /* Output mode */
stmpe1600_IO_DisablePinIT(DeviceAddr, IO_Pin);
stmpe1600_IO_InitPin(DeviceAddr, IO_Pin, STMPE1600_DIRECTION_OUT);
break;
case IO_MODE_IT_RISING_EDGE: /* Interrupt rising edge mode */
stmpe1600_SetITPolarity(DeviceAddr, STMPE1600_POLARITY_HIGH);
stmpe1600_IO_EnablePinIT(DeviceAddr, IO_Pin);
stmpe1600_IO_InitPin(DeviceAddr, IO_Pin, STMPE1600_DIRECTION_IN);
/* Clear all IO IT pending bits if any */
stmpe1600_IO_ClearIT(DeviceAddr, IO_Pin);
/* Read GMPR to enable interrupt */
IOE_ReadMultiple(DeviceAddr , STMPE1600_REG_GPMR, buffer, 2);
break;
case IO_MODE_IT_FALLING_EDGE: /* Interrupt falling edge mode */
stmpe1600_SetITPolarity(DeviceAddr, STMPE1600_POLARITY_LOW);
stmpe1600_IO_EnablePinIT(DeviceAddr, IO_Pin);
stmpe1600_IO_InitPin(DeviceAddr, IO_Pin, STMPE1600_DIRECTION_IN);
/* Clear all IO IT pending bits if any */
stmpe1600_IO_ClearIT(DeviceAddr, IO_Pin);
/* Read GMPR to enable interrupt */
IOE_ReadMultiple(DeviceAddr , STMPE1600_REG_GPMR, buffer, 2);
break;
default:
error_code = (uint8_t) IO_Mode;
break;
}
return error_code;
}
/**
* @brief Enable polarity inversion of the selected IO pin(s).
* @param DeviceAddr: Device address on communication Bus.
* @param IO_Pin: IO pin(s) to be configured.
* This parameter could be any combination of the following values:
* @arg STMPE1600_PIN_x: where x can be from 0 to 15.
* @retval None
*/
void stmpe1600_IO_PolarityInv_Enable(uint16_t DeviceAddr, uint32_t IO_Pin)
{
uint8_t tmpData[2] = {0 , 0};
/* Get the current register value */
IOE_ReadMultiple(DeviceAddr, STMPE1600_REG_GPPIR, tmpData, 2);
tmp = ((uint16_t)tmpData[0] | (((uint16_t)tmpData[1]) << 8));
/* Enable pin polarity inversion */
tmp |= (uint16_t)IO_Pin;
/* Set the new register value */
IOE_WriteMultiple(DeviceAddr, STMPE1600_REG_GPPIR, (uint8_t *)&tmp, 2);
}
/**
* @brief Disable polarity inversion of the selected IO pins.
* @param DeviceAddr: Device address on communication Bus.
* @param IO_Pin: IO pin(s) to be configured.
* This parameter could be any combination of the following values:
* @arg STMPE1600_PIN_x: where x can be from 0 to 15.
* @retval None
*/
void stmpe1600_IO_PolarityInv_Disable(uint16_t DeviceAddr, uint32_t IO_Pin)
{
uint8_t tmpData[2] = {0 , 0};
/* Get the current register value */
IOE_ReadMultiple(DeviceAddr, STMPE1600_REG_GPPIR, tmpData, 2);
tmp = ((uint16_t)tmpData[0] | (((uint16_t)tmpData[1]) << 8));
/* Disable pin polarity inversion */
tmp &= ~ (uint16_t)IO_Pin;
/* Set the new register value */
IOE_WriteMultiple(DeviceAddr, STMPE1600_REG_GPPIR, (uint8_t *)&tmp, 2);
}
/**
* @brief Set the value of the selected IO pins.
* @param DeviceAddr: Device address on communication Bus.
* @param IO_Pin: IO pin(s) to be set.
* This parameter could be any combination of the following values:
* @arg STMPE1600_PIN_x: where x can be from 0 to 15.
* @param PinState: The value to be set.
* @retval None
*/
void stmpe1600_IO_WritePin(uint16_t DeviceAddr, uint32_t IO_Pin, uint8_t PinState)
{
uint8_t tmpData[2] = {0 , 0};
/* Get the current register value */
IOE_ReadMultiple(DeviceAddr, STMPE1600_REG_GPMR, tmpData, 2);
tmp = ((uint16_t)tmpData[0] | (((uint16_t)tmpData[1]) << 8));
/* Set the pin state */
if(PinState != 0)
{
tmp |= (uint16_t)IO_Pin;
}
else
{
tmp &= ~(uint16_t)IO_Pin;
}
/* Set the new register value */
IOE_WriteMultiple(DeviceAddr, STMPE1600_REG_GPSR, (uint8_t *)&tmp, 2);
}
/**
* @brief Read the state of the selected IO pin(s).
* @param DeviceAddr: Device address on communication Bus.
* @param IO_Pin: IO pin(s) to be read.
* This parameter could be any combination of the following values:
* @arg STMPE1600_PIN_x: where x can be from 0 to 15.
* @retval State of the selected IO pin(s).
*/
uint32_t stmpe1600_IO_ReadPin(uint16_t DeviceAddr, uint32_t IO_Pin)
{
uint8_t tmpData[2] = {0 , 0};
/* Get the register value */
IOE_ReadMultiple(DeviceAddr, STMPE1600_REG_GPMR, tmpData, 2);
tmp = ((uint16_t)tmpData[0] | (((uint16_t)tmpData[1]) << 8));
/* Return the pin(s) state */
return(tmp & IO_Pin);
}
/**
* @brief Enable the interrupt mode for the selected IO pin(s).
* @param DeviceAddr: Device address on communication Bus.
* @param IO_Pin: IO pin(s) to be configured.
* This parameter could be any combination of the following values:
* @arg STMPE1600_PIN_x: where x can be from 0 to 15.
* @retval None
*/
void stmpe1600_IO_EnablePinIT(uint16_t DeviceAddr, uint32_t IO_Pin)
{
uint8_t tmpData[2] = {0 , 0};
/* Enable global interrupt */
stmpe1600_EnableGlobalIT(DeviceAddr);
/* Get the current register value */
IOE_ReadMultiple(DeviceAddr, STMPE1600_REG_IEGPIOR, tmpData, 2);
tmp = ((uint16_t)tmpData[0] | (((uint16_t)tmpData[1]) << 8));
/* Put pin in IT mode */
tmp |= (uint16_t)IO_Pin;
/* Write the new register value */
IOE_WriteMultiple(DeviceAddr, STMPE1600_REG_IEGPIOR, (uint8_t *)&tmp, 2);
}
/**
* @brief Disable the interrupt mode for the selected IO pin(s).
* @param DeviceAddr: Device address on communication Bus.
* @param IO_Pin: IO pin(s) to be configured.
* This parameter could be any combination of the following values:
* @arg STMPE1600_PIN_x: where x can be from 0 to 15.
* @retval None
*/
void stmpe1600_IO_DisablePinIT(uint16_t DeviceAddr, uint32_t IO_Pin)
{
uint8_t tmpData[2] = {0 , 0};
/* Get the current register value */
IOE_ReadMultiple(DeviceAddr, STMPE1600_REG_IEGPIOR, tmpData, 2);
tmp = ((uint16_t)tmpData[0] | (((uint16_t)tmpData[1]) << 8));
/* Disable the IT pin mode */
tmp &= ~(uint16_t)IO_Pin;
/* Set the new register value */
IOE_WriteMultiple(DeviceAddr, STMPE1600_REG_IEGPIOR, (uint8_t *)&tmp, 2);
}
/**
* @brief Read the IT status of the selected IO pin(s)
* (clears all the pending bits if any).
* @param DeviceAddr: Device address on communication Bus.
* @param IO_Pin: IO pin(s) to be checked.
* This parameter could be any combination of the following values:
* @arg STMPE1600_PIN_x: where x can be from 0 to 15.
* @retval IT Status of the selected IO pin(s).
*/
uint32_t stmpe1600_IO_ITStatus(uint16_t DeviceAddr, uint32_t IO_Pin)
{
uint8_t tmpData[2] = {0 , 0};
/* Get the register value */
IOE_ReadMultiple(DeviceAddr, STMPE1600_REG_ISGPIOR, tmpData, 2);
tmp = ((uint16_t)tmpData[0] | (((uint16_t)tmpData[1]) << 8));
/* Return the pin IT status */
return((tmp & IO_Pin) == IO_Pin);
}
/**
* @brief Detect an IT pending bit from the selected IO pin(s).
* (clears all the pending bits if any).
* @param DeviceAddr: Device address on communication Bus.
* @param IO_Pin: IO pin(s) to be checked.
* This parameter could be any combination of the following values:
* @arg STMPE1600_PIN_x: where x can be from 0 to 15.
* @retval IT pending bit detection status.
*/
uint8_t stmpe1600_IO_ReadIT(uint16_t DeviceAddr, uint32_t IO_Pin)
{
uint8_t tmpData[2] = {0 , 0};
/* Get the register value */
IOE_ReadMultiple(DeviceAddr, STMPE1600_REG_ISGPIOR, tmpData, 2);
tmp = ((uint16_t)tmpData[0] | (((uint16_t)tmpData[1]) << 8));
/* Return if there is an IT pending bit or not */
return(tmp & IO_Pin);
}
/**
* @brief Clear all the IT pending bits if any.
* @param DeviceAddr: Device address on communication Bus.
* @retval None
*/
void stmpe1600_IO_ClearIT(uint16_t DeviceAddr, uint32_t IO_Pin)
{
uint8_t tmpData[2] = {0 , 0};
/* Get the register value to clear all pending bits */
IOE_ReadMultiple(DeviceAddr, STMPE1600_REG_ISGPIOR, tmpData, 2);
}
/**
* @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 stmpe1600_GetInstance(uint16_t DeviceAddr)
{
uint8_t idx = 0;
/* Check all the registered instances */
for(idx = 0; idx < STMPE1600_MAX_INSTANCE ; idx ++)
{
/* Return index if there is address match */
if(stmpe1600[idx] == DeviceAddr)
{
return idx;
}
}
return 0xFF;
}
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/