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Diffstat (limited to 'tmp/STM32F10x_StdPeriph_Lib_V3.5.0/Utilities/STM32_EVAL/STM32100E_EVAL/stm32100e_eval_ioe.c')
| -rw-r--r-- | tmp/STM32F10x_StdPeriph_Lib_V3.5.0/Utilities/STM32_EVAL/STM32100E_EVAL/stm32100e_eval_ioe.c | 1405 |
1 files changed, 0 insertions, 1405 deletions
diff --git a/tmp/STM32F10x_StdPeriph_Lib_V3.5.0/Utilities/STM32_EVAL/STM32100E_EVAL/stm32100e_eval_ioe.c b/tmp/STM32F10x_StdPeriph_Lib_V3.5.0/Utilities/STM32_EVAL/STM32100E_EVAL/stm32100e_eval_ioe.c deleted file mode 100644 index e45fc96..0000000 --- a/tmp/STM32F10x_StdPeriph_Lib_V3.5.0/Utilities/STM32_EVAL/STM32100E_EVAL/stm32100e_eval_ioe.c +++ /dev/null @@ -1,1405 +0,0 @@ -/** - ****************************************************************************** - * @file stm32100e_eval_ioe.c - * @author MCD Application Team - * @version V4.5.0 - * @date 07-March-2011 - * @brief This file includes the IO Expander driver for STMPE811 IO Expander - * devices. - ****************************************************************************** - * @attention - * - * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS - * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE - * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY - * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING - * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE - * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS. - * - * <h2><center>© COPYRIGHT 2011 STMicroelectronics</center></h2> - ****************************************************************************** - */ - - /* File Info : --------------------------------------------------------------- - - Note: - ----- - - This driver uses the DMA method for sending and receiving data on I2C bus - which allow higher efficiency and reliability of the communication. - - SUPPORTED FEATURES: - - Touch Screen Features: Single point mode (Polling/Interrupt). - - TempSensor Feature: accuracy not determined (Polling). - - IO Read/write : Set/Reset and Read (Polling/Interrupt). - - UNSUPPORTED FEATURES: - - Row ADC Feature is not supported (not implemented on STM32100E-EVAL board) - - Joystick: config and Read (Polling/Interrupt) - ----------------------------------------------------------------------------*/ - -/* Includes ------------------------------------------------------------------*/ -#include "stm32100e_eval_ioe.h" - -/** @addtogroup Utilities - * @{ - */ - -/** @addtogroup STM32_EVAL - * @{ - */ - -/** @addtogroup STM32100E_EVAL - * @{ - */ - -/** @defgroup STM32100E_EVAL_IOE - * @brief This file includes the IO Expander driver for STMPE811 IO Expander - * devices. - * @{ - */ - -/** @defgroup STM32100E_EVAL_IOE_Private_TypesDefinitions - * @{ - */ -/** - * @} - */ - - -/** @defgroup STM32100E_EVAL_IOE_Private_Defines - * @{ - */ -#define TIMEOUT_MAX 0x1000 /*<! The value of the maximal timeout for I2C waiting loops */ -/** - * @} - */ - - -/** @defgroup STM32100E_EVAL_IOE_Private_Macros - * @{ - */ -/** - * @} - */ - - -/** @defgroup STM32100E_EVAL_IOE_Private_Variables - * @{ - */ -TS_STATE TS_State; /*<! The global structure holding the TS state */ - -uint32_t IOE_TimeOut = TIMEOUT_MAX; /*<! Value of Timeout when I2C communication fails */ -/** - * @} - */ - - -/** @defgroup STM32100E_EVAL_IOE_Private_FunctionPrototypes - * @{ - */ -static uint16_t IOE_TS_Read_X(void); -static uint16_t IOE_TS_Read_Y(void); -static uint16_t IOE_TS_Read_Z(void); - -static void IOE_GPIO_Config(void); -static void IOE_I2C_Config(void); -static void IOE_DMA_Config(IOE_DMADirection_TypeDef Direction, uint8_t* buffer); -static void IOE_EXTI_Config(void); - -#ifndef USE_Delay -static void delay(__IO uint32_t nCount); -#endif /* USE_Delay*/ -/** - * @} - */ - - -/** @defgroup STM32100E_EVAL_IOE_Private_Functions - * @{ - */ - - -/** - * @brief Initializes and Configures the IO_Expanders Functionalities - * (Touch Screen ..) and configures all STM32100E-EVAL necessary - * hardware (GPIOs, APB clocks ..). - * @param None - * @retval IOE_OK if all initializations done correctly. Other value if error. - */ -uint8_t IOE_Config(void) -{ - /* Configure the needed pins */ - IOE_GPIO_Config(); - - /* Configure I2C peripheral */ - IOE_I2C_Config(); - - /* Read IO Expander 1 ID */ - if(IOE_IsOperational(IOE_1_ADDR)) - { - return IOE1_NOT_OPERATIONAL; - } - - /* Generate IOExpander Software reset */ - IOE_Reset(IOE_1_ADDR); - - /* ---------------------- IO Expander configuration --------------------- */ - /* Enable the GPIO, Touch Screen and ADC functionalities */ - IOE_FnctCmd(IOE_1_ADDR, IOE_TS_FCT | IOE_ADC_FCT | IOE_IO_FCT | IOE_TEMPSENS_FCT , ENABLE); - - /* Touch Screen controller configuration */ - IOE_TS_Config(); - - /* Temperature Sensor configuration */ - IOE_TempSens_Config(); - - /* ------------------------------------------------------------------------ */ - - /* Configuration is OK */ - return IOE_OK; -} - -/** - * @brief Configures The selected interrupts on the IO Expanders. - * @param IOE_ITSRC_Source: the source of the interrupts. Could be one or a - * combination of the following parameters: - * @arg IOE_ITSRC_TSC: Touch Screen interrupts. - * @retval IOE_OK: if all initializations are OK. Other value if error. - */ -uint8_t IOE_ITConfig(uint32_t IOE_ITSRC_Source) -{ - /* Configure the Interrupt output pin to generate low level (INT_CTRL) */ - IOE_ITOutConfig(Polarity_Low, Type_Level); - - /* Manage the Touch Screen Interrupts */ - if (IOE_ITSRC_Source & IOE_ITSRC_TSC) - { - /* Enable the Global interrupt */ - IOE_GITCmd(IOE_1_ADDR, ENABLE); - - /* Enable the Global GPIO Interrupt */ - IOE_GITConfig(IOE_1_ADDR, (uint8_t)(IOE_GIT_TOUCH | IOE_GIT_FTH | IOE_GIT_FOV), ENABLE); - - /* Read the GPIO_IT_STA to clear all pending bits if any */ - I2C_ReadDeviceRegister(IOE_1_ADDR, IOE_REG_GPIO_INT_STA); - } - - /* Configure the Interrupt line as EXTI source */ - IOE_EXTI_Config(); - - /* If all OK return IOE_OK */ - return IOE_OK; -} - -/** - * @brief Writes a bit value to an output IO pin. - * @param IO_Pin: The output pin to be set or reset. - * IO_Pin_x: Where x can be from 0 to 7. - * @param BitVal: The value to be set. This parameter can be one of the - * following values: BitSet or BitReset. See IOE_BitVal_TypeDef. - * @retval IOE_OK or PARAM_ERROR - */ -uint8_t IOE_WriteIOPin(uint8_t IO_Pin, IOE_BitValue_TypeDef BitVal) -{ - uint8_t DeviceAddr = 0; - - /* Get the IO expander Address according to which pin is to be controlled */ - if (IO_Pin & IO1_OUT_ALL_PINS) - { - DeviceAddr = IOE_1_ADDR; - } - else - { - return PARAM_ERROR; - } - - /* Apply the bit value to the selected pin */ - if (BitVal == BitReset) - { - /* Set the register */ - I2C_WriteDeviceRegister(DeviceAddr, IOE_REG_GPIO_CLR_PIN, IO_Pin); - } - else - { - /* Set the register */ - I2C_WriteDeviceRegister(DeviceAddr, IOE_REG_GPIO_SET_PIN, IO_Pin); - } - - return IOE_OK; -} - - -/** - * @brief Returns the status of the selected input IO pin. - * @param IO_Pin: The input pin to be read. - * IO_Pin_x: Where x can be from 0 to 7. - * @arg JOY_IO_PINS: Joystick IO pins (use IOE_JoyStickGetState for these pins) - * @retval None - */ -uint8_t IOE_ReadIOPin(uint32_t IO_Pin) -{ - uint8_t DeviceAddr = 0; - uint8_t tmp = 0; - if (IO_Pin & IO1_IN_ALL_PINS) - { - DeviceAddr = IOE_1_ADDR; - } - else - { - return PARAM_ERROR; - } - - /* Get all the Pins status */ - tmp = I2C_ReadDeviceRegister(DeviceAddr, IOE_REG_GPIO_MP_STA); - if ((tmp & (uint8_t)IO_Pin) != 0) - { - return BitSet; - } - else - { - return BitReset; - } -} - - -/** - * @brief Returns Status and positions of the Touch screen. - * @param None - * @retval Pointer to TS_STATE structure holding Touch Screen information. - */ -TS_STATE* IOE_TS_GetState(void) -{ - uint32_t xDiff, yDiff , x , y; - static uint32_t _x = 0, _y = 0; - - /* Check if the Touch detect event happenned */ - TS_State.TouchDetected = (I2C_ReadDeviceRegister(IOE_1_ADDR, IOE_REG_TSC_CTRL) & 0x80); - if(TS_State.TouchDetected) - { - x = IOE_TS_Read_X(); - y = IOE_TS_Read_Y(); - xDiff = x > _x? (x - _x): (_x - x); - yDiff = y > _y? (y - _y): (_y - y); - if (xDiff + yDiff > 5) - { - _x = x; - _y = y; - } - } - /* Update the X position */ - TS_State.X = _x; - - /* Update the Y position */ - TS_State.Y = _y; - /* Update the Z Pression index */ - TS_State.Z = IOE_TS_Read_Z(); - - /* Clear the interrupt pending bit and enable the FIFO again */ - I2C_WriteDeviceRegister(IOE_1_ADDR, IOE_REG_FIFO_STA, 0x01); - I2C_WriteDeviceRegister(IOE_1_ADDR, IOE_REG_FIFO_STA, 0x00); - - /* Return pointer to the updated structure */ - return &TS_State; -} - -/** - * @brief Returns the temperature row value (in 16 bit format). - * @param None - * @retval The temperature row value. - */ -uint32_t IOE_TempSens_GetData(void) -{ - static __IO uint32_t tmp = 0; - - /* Aquire data enable */ - I2C_WriteDeviceRegister(IOE_1_ADDR, IOE_REG_TEMP_CTRL, 0x03); - - /* Enable the TEMPSENS module */ - tmp = (uint32_t)((I2C_ReadDeviceRegister(IOE_1_ADDR, IOE_REG_TEMP_DATA) & 0x03) << 8); - tmp |= (uint32_t)I2C_ReadDeviceRegister(IOE_1_ADDR, IOE_REG_TEMP_DATA + 1); - - tmp = (uint32_t)((33 * tmp * 100) / 751); - tmp = (uint32_t)((tmp + 5) / 10); - - /* return the temprature row value */ - return tmp; -} - -/** - * @brief Checks the selected Global interrupt source pending bit - * @param DeviceAddr: The address of the IOExpander, could be : IOE_1_ADDR. - * @param Global_IT: the Global interrupt source to be checked, could be: - * @arg Global_IT_GPIO : All IOs interrupt - * @arg Global_IT_ADC : ADC interrupt - * @arg Global_IT_TEMP : Temperature Sensor interrupts - * @arg Global_IT_FE : Touch Screen Controller FIFO Error interrupt - * @arg Global_IT_FF : Touch Screen Controller FIFO Full interrupt - * @arg Global_IT_FOV : Touch Screen Controller FIFO Overrun interrupt - * @arg Global_IT_FTH : Touch Screen Controller FIFO Threshold interrupt - * @arg Global_IT_TOUCH : Touch Screen Controller Touch Detected interrupt - * @retval Status of the checked flag. Could be SET or RESET. - */ -FlagStatus IOE_GetGITStatus(uint8_t DeviceAddr, uint8_t Global_IT) -{ - __IO uint8_t tmp = 0; - - /* get the Interrupt status */ - tmp = I2C_ReadDeviceRegister(DeviceAddr, IOE_REG_INT_STA); - - if ((tmp & (uint8_t)Global_IT) != 0) - { - return SET; - } - else - { - return RESET; - } -} - -/** - * @brief Clears the selected Global interrupt pending bit(s) - * @param DeviceAddr: The address of the IOExpander, could be : IOE_1_ADDR. - * @param Global_IT: the Global interrupt to be cleared, could be any combination - * of the following values: - * @arg Global_IT_GPIO : All IOs interrupt - * @arg Global_IT_ADC : ADC interrupt - * @arg Global_IT_TEMP : Temperature Sensor interrupts - * @arg Global_IT_FE : Touch Screen Controller FIFO Error interrupt - * @arg Global_IT_FF : Touch Screen Controller FIFO Full interrupt - * @arg Global_IT_FOV : Touch Screen Controller FIFO Overrun interrupt - * @arg Global_IT_FTH : Touch Screen Controller FIFO Threshold interrupt - * @arg Global_IT_TOUCH : Touch Screen Controller Touch Detected interrupt - * @retval IOE_OK: if all initializations are OK. Other value if error. - */ -uint8_t IOE_ClearGITPending(uint8_t DeviceAddr, uint8_t Global_IT) -{ - /* Write 1 to the bits that have to be cleared */ - I2C_WriteDeviceRegister(DeviceAddr, IOE_REG_INT_STA, Global_IT); - - /* If all OK return IOE_OK */ - return IOE_OK; -} - -/** - * @brief Checks the status of the selected IO interrupt pending bit - * @param DeviceAddr: The address of the IOExpander, could be : IOE_1_ADDR. - * @param IO_IT: the IO interrupt to be checked could be IO_ITx Where x can be - * from 0 to 7. - * @retval Status of the checked flag. Could be SET or RESET. - */ -FlagStatus IOE_GetIOITStatus(uint8_t DeviceAddr, uint8_t IO_IT) -{ - uint8_t tmp = 0; - - /* get the Interrupt status */ - tmp = I2C_ReadDeviceRegister(DeviceAddr, IOE_REG_GPIO_INT_STA); - - if ((tmp & (uint8_t)IO_IT) != 0) - { - return SET; - } - else - { - return RESET; - } -} - -/** - * @brief Clears the selected IO interrupt pending bit(s). - * @param DeviceAddr: The address of the IOExpander, could be : IOE_1_ADDR. - * @param IO_IT: the IO interrupt to be checked could be IO_ITx Where x can be - * from 0 to 7. - * @retval IOE_OK: if all initializations are OK. Other value if error. - */ -uint8_t IOE_ClearIOITPending(uint8_t DeviceAddr, uint8_t IO_IT) -{ - /* Write 1 to the bits that have to be cleared */ - I2C_WriteDeviceRegister(DeviceAddr, IOE_REG_GPIO_INT_STA, IO_IT); - - /* Clear the Edge detection pending bit*/ - I2C_WriteDeviceRegister(DeviceAddr, IOE_REG_GPIO_ED, IO_IT); - - /* Clear the Rising edge pending bit */ - I2C_WriteDeviceRegister(DeviceAddr, IOE_REG_GPIO_RE, IO_IT); - - /* Clear the Falling edge pending bit */ - I2C_WriteDeviceRegister(DeviceAddr, IOE_REG_GPIO_FE, IO_IT); - - return IOE_OK; - -} -/** - * @brief Checks if the selected device is correctly configured and - * communicates correctly ont the I2C bus. - * @param DeviceAddr: The address of the IOExpander, could be : IOE_1_ADDR. - * @retval IOE_OK if IOE is operational. Other value if failure. - */ -uint8_t IOE_IsOperational(uint8_t DeviceAddr) -{ - /* Return Error if the ID is not correct */ - if( IOE_ReadID(DeviceAddr) != (uint16_t)STMPE811_ID ) - { - /* Check if a Timeout occured */ - if (IOE_TimeOut == 0) - { - return(IOE_TimeoutUserCallback()); - } - else - { - return IOE_FAILURE; /* ID is not Correct */ - } - } - else - { - return IOE_OK; /* ID is correct */ - } -} - -/** - * @brief Resets the IO Expander by Software (SYS_CTRL1, RESET bit). - * @param DeviceAddr: The address of the IOExpander, could be : IOE_1_ADDR. - * @retval IOE_OK: if all initializations are OK. Other value if error. - */ -uint8_t IOE_Reset(uint8_t DeviceAddr) -{ - /* Power Down the IO_Expander */ - I2C_WriteDeviceRegister(DeviceAddr, IOE_REG_SYS_CTRL1, 0x02); - - /* wait for a delay to insure registers erasing */ - _delay_(2); - - /* Power On the Codec after the power off => all registers are reinitialized*/ - I2C_WriteDeviceRegister(DeviceAddr, IOE_REG_SYS_CTRL1, 0x00); - - /* If all OK return IOE_OK */ - return IOE_OK; -} - -/** - * @brief Reads the selected device's ID. - * @param DeviceAddr: The address of the IOExpander, could be : IOE_1_ADDR. - * @retval The Device ID (two bytes). - */ -uint16_t IOE_ReadID(uint8_t DeviceAddr) -{ - uint16_t tmp = 0; - - /* Read device ID */ - tmp = I2C_ReadDeviceRegister(DeviceAddr, 0); - tmp = (uint32_t)(tmp << 8); - tmp |= (uint32_t)I2C_ReadDeviceRegister(DeviceAddr, 1); - - /* Return the ID */ - return (uint16_t)tmp; -} - -/** - * @brief Configures the selcted IO Expander functionalities. - * @param DeviceAddr: The address of the IOExpander, could be : IOE_1_ADDR. - * @param Fct: the functions to be configured. could be any - * combination of the following values: - * @arg IOE_IO_FCT : IO function - * @arg IOE_TS_FCT : Touch Screen function - * @arg IOE_ADC_FCT : ADC function - * @arg IOE_TEMPSENS_FCT : Tempreature Sensor function - * @retval IOE_OK: if all initializations are OK. Other value if error. - */ -uint8_t IOE_FnctCmd(uint8_t DeviceAddr, uint8_t Fct, FunctionalState NewState) -{ - uint8_t tmp = 0; - - /* Get the register value */ - tmp = I2C_ReadDeviceRegister(DeviceAddr, IOE_REG_SYS_CTRL2); - - if (NewState != DISABLE) - { - /* Set the Functionalities to be Enabled */ - tmp &= ~(uint8_t)Fct; - } - else - { - /* Set the Functionalities to be Disabled */ - tmp |= (uint8_t)Fct; - } - - /* Set the register value */ - I2C_WriteDeviceRegister(DeviceAddr, IOE_REG_SYS_CTRL2, tmp); - - /* If all OK return IOE_OK */ - return IOE_OK; -} - -/** - * @brief Configures the selected pin direction (to be an input or an output) - * @param DeviceAddr: The address of the IOExpander, could be : IOE_1_ADDR. - * @param IO_Pin: IO_Pin_x: Where x can be from 0 to 7. - * @param Direction: could be Direction_IN or Direction_OUT. - * @retval IOE_OK: if all initializations are OK. Other value if error. - */ -uint8_t IOE_IOPinConfig(uint8_t DeviceAddr, uint8_t IO_Pin, uint8_t Direction) -{ - uint8_t tmp = 0; - - /* Get all the Pins direction */ - tmp = I2C_ReadDeviceRegister(DeviceAddr, IOE_REG_GPIO_DIR); - - if (Direction != Direction_IN) - { - tmp |= (uint8_t)IO_Pin; - } - else - { - tmp &= ~(uint8_t)IO_Pin; - } - - /* Write the register new value */ - I2C_WriteDeviceRegister(DeviceAddr, IOE_REG_GPIO_DIR, tmp); - - /* If all OK return IOE_OK */ - return IOE_OK; -} - -/** - * @brief Enables or disables the Global interrupt. - * @param DeviceAddr: The address of the IOExpander, could be :I OE_1_ADDR. - * @param NewState: could be ENABLE or DISABLE. - * @retval IOE_OK: if all initializations are OK. Other value if error. - */ -uint8_t IOE_GITCmd(uint8_t DeviceAddr, FunctionalState NewState) -{ - uint8_t tmp = 0; - - /* Read the Interrupt Control register */ - I2C_ReadDeviceRegister(DeviceAddr, IOE_REG_INT_CTRL); - - if (NewState != DISABLE) - { - /* Set the global interrupts to be Enabled */ - tmp |= (uint8_t)IOE_GIT_EN; - } - else - { - /* Set the global interrupts to be Disabled */ - tmp &= ~(uint8_t)IOE_GIT_EN; - } - - /* Write Back the Interrupt Control register */ - I2C_WriteDeviceRegister(DeviceAddr, IOE_REG_INT_CTRL, tmp); - - /* If all OK return IOE_OK */ - return IOE_OK; -} - -/** - * @brief Configures the selected source to generate or not a global interrupt - * @param DeviceAddr: The address of the IOExpander, could be : IOE_1_ADDR - * @param Global_IT: the interrupt source to be configured, could be: - * @arg Global_IT_GPIO : All IOs interrupt - * @arg Global_IT_ADC : ADC interrupt - * @arg Global_IT_TEMP : Temperature Sensor interrupts - * @arg Global_IT_FE : Touch Screen Controller FIFO Error interrupt - * @arg Global_IT_FF : Touch Screen Controller FIFO Full interrupt - * @arg Global_IT_FOV : Touch Screen Controller FIFO Overrun interrupt - * @arg Global_IT_FTH : Touch Screen Controller FIFO Threshold interrupt - * @arg Global_IT_TOUCH : Touch Screen Controller Touch Detected interrupt - * @retval IOE_OK: if all initializations are OK. Other value if error. - */ -uint8_t IOE_GITConfig(uint8_t DeviceAddr, uint8_t Global_IT, FunctionalState NewState) -{ - uint8_t tmp = 0; - - /* Get the current value of the INT_EN register */ - tmp = I2C_ReadDeviceRegister(DeviceAddr, IOE_REG_INT_EN); - - if (NewState != DISABLE) - { - /* Set the interrupts to be Enabled */ - tmp |= (uint8_t)Global_IT; - } - else - { - /* Set the interrupts to be Disabled */ - tmp &= ~(uint8_t)Global_IT; - } - /* Set the register */ - I2C_WriteDeviceRegister(DeviceAddr, IOE_REG_INT_EN, tmp); - - /* If all OK return IOE_OK */ - return IOE_OK; -} - -/** - * @brief Configures the selected pins to generate an interrupt or not. - * @param DeviceAddr: The address of the IOExpander, could be : IOE_1_ADDR. - * @param IO_IT: The IO interrupt to be configured. This parameter could be any - * combination of the following values: - * @arg IO_IT_x: where x can be from 0 to 7. - * @param NewState: could be ENABLE or DISABLE. - * @retval IOE_OK: if all initializations are OK. Other value if error. - */ -uint8_t IOE_IOITConfig(uint8_t DeviceAddr, uint8_t IO_IT, FunctionalState NewState) -{ - uint8_t tmp = 0; - - tmp = I2C_ReadDeviceRegister(DeviceAddr, IOE_REG_GPIO_INT_EN); - - if (NewState != DISABLE) - { - /* Set the interrupts to be Enabled */ - tmp |= (uint8_t)IO_IT; - } - else - { - /* Set the interrupts to be Disabled */ - tmp &= ~(uint8_t)IO_IT; - } - - /* Set the register */ - I2C_WriteDeviceRegister(DeviceAddr, IOE_REG_GPIO_INT_EN, tmp); - - /* If all OK return IOE_OK */ - return IOE_OK; -} - -/** - * @brief Configures the touch Screen Controller (Single point detection) - * @param None - * @retval IOE_OK if all initializations are OK. Other value if error. - */ -uint8_t IOE_TS_Config(void) -{ - uint8_t tmp = 0; - - /* Enable TSC Fct: already done in IOE_Config */ - tmp = I2C_ReadDeviceRegister(IOE_1_ADDR, IOE_REG_SYS_CTRL2); - tmp &= ~(uint32_t)(IOE_TS_FCT | IOE_ADC_FCT); - I2C_WriteDeviceRegister(IOE_1_ADDR, IOE_REG_SYS_CTRL2, tmp); - - /* Enable the TSC gloabl interrupts */ - tmp = I2C_ReadDeviceRegister(IOE_1_ADDR, IOE_REG_INT_EN); - tmp |= (uint32_t)(IOE_GIT_TOUCH | IOE_GIT_FTH | IOE_GIT_FOV); - I2C_WriteDeviceRegister(IOE_1_ADDR, IOE_REG_INT_EN, tmp); - - /* Select Sample Time, bit number and ADC Reference */ - I2C_WriteDeviceRegister(IOE_1_ADDR, IOE_REG_ADC_CTRL1, 0x49); - - /* Wait for ~20 ms */ - _delay_(2); - - /* Select the ADC clock speed: 3.25 MHz */ - I2C_WriteDeviceRegister(IOE_1_ADDR, IOE_REG_ADC_CTRL2, 0x01); - - /* Select TSC pins in non default mode */ - tmp = I2C_ReadDeviceRegister(IOE_1_ADDR, IOE_REG_GPIO_AF); - tmp &= ~(uint8_t)TOUCH_IO_ALL; - I2C_WriteDeviceRegister(IOE_1_ADDR, IOE_REG_GPIO_AF, tmp); - - /* Select 2 nF filter capacitor */ - I2C_WriteDeviceRegister(IOE_1_ADDR, IOE_REG_TSC_CFG, 0x9A); - - /* Select single point reading */ - I2C_WriteDeviceRegister(IOE_1_ADDR, IOE_REG_FIFO_TH, 0x01); - - /* Write 0x01 to clear the FIFO memory content. */ - I2C_WriteDeviceRegister(IOE_1_ADDR, IOE_REG_FIFO_STA, 0x01); - - /* Write 0x00 to put the FIFO back into operation mode */ - I2C_WriteDeviceRegister(IOE_1_ADDR, IOE_REG_FIFO_STA, 0x00); - - /* set the data format for Z value: 7 fractional part and 1 whole part */ - I2C_WriteDeviceRegister(IOE_1_ADDR, IOE_REG_TSC_FRACT_XYZ, 0x01); - - /* set the driving capability of the device for TSC pins: 50mA */ - I2C_WriteDeviceRegister(IOE_1_ADDR, IOE_REG_TSC_I_DRIVE, 0x01); - - /* Use no tracking index, touchscreen controller operation mode (XYZ) and - enable the TSC */ - I2C_WriteDeviceRegister(IOE_1_ADDR, IOE_REG_TSC_CTRL, 0x01); - - /* Clear all the status pending bits */ - I2C_WriteDeviceRegister(IOE_1_ADDR, IOE_REG_INT_STA, 0xFF); - - /* Initialize the TS structure to their default values */ - TS_State.TouchDetected = TS_State.X = TS_State.Y = TS_State.Z = 0; - - /* All configuration done */ - return IOE_OK; -} - -/** - * @brief Configures and enables the Temperature sensor module. - * @param None - * @retval IOE_OK if all initializations are OK. Other value if error. - */ -uint8_t IOE_TempSens_Config(void) -{ - __IO uint8_t tmp = 0; - - /* Enable Temperature Sensor Fct: already done in IOE_Config */ - tmp = I2C_ReadDeviceRegister(IOE_1_ADDR, IOE_REG_SYS_CTRL2); - tmp &= ~(uint32_t)(IOE_TEMPSENS_FCT | IOE_ADC_FCT); - I2C_WriteDeviceRegister(IOE_1_ADDR, IOE_REG_SYS_CTRL2, tmp); - - /* Enable the TEMPSENS module */ - I2C_WriteDeviceRegister(IOE_1_ADDR, IOE_REG_TEMP_CTRL, 0x01); - - /* Aquire data enable */ - I2C_WriteDeviceRegister(IOE_1_ADDR, IOE_REG_TEMP_CTRL, 0x3); - - /* All configuration done */ - return IOE_OK; -} - -/** - * @brief Configures the selected pin to be in Alternate function or not - * @param DeviceAddr: The address of the IOExpander, could be : IOE_1_ADDR. - * @param IO_Pin: IO_Pin_x, Where x can be from 0 to 7. - * @param NewState: State of the AF for the selected pin, could be - * ENABLE or DISABLE. - * @retval IOE_OK: if all initializations are OK. Other value if error. - */ -uint8_t IOE_IOAFConfig(uint8_t DeviceAddr, uint8_t IO_Pin, FunctionalState NewState) -{ - uint8_t tmp = 0; - - /* Get the current state of the GPIO_AF register */ - tmp = I2C_ReadDeviceRegister(DeviceAddr, IOE_REG_GPIO_AF); - - if (NewState != DISABLE) - { - /* Enable the selected pins alternate function */ - tmp |= (uint8_t)IO_Pin; - } - else - { - /* Disable the selected pins alternate function */ - tmp &= ~(uint8_t)IO_Pin; - } - - /* Write back the new valu in GPIO_AF register */ - I2C_WriteDeviceRegister(DeviceAddr, IOE_REG_GPIO_AF, tmp); - - /* If all OK return IOE_OK */ - return IOE_OK; -} - -/** - * @brief Configures the Edge for which a transition is detectable for the - * the selected pin. - * @param DeviceAddr: The address of the IOExpander, could be : IOE_1_ADDR. - * @param IO_Pin: IO_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 - * a combination of follwing values: EDGE_FALLING and EDGE_RISING . - * @retval IOE_OK: if all initializations are OK. Other value if error. - */ -uint8_t IOE_IOEdgeConfig(uint8_t DeviceAddr, uint8_t IO_Pin, uint8_t Edge) -{ - uint8_t tmp1 = 0, tmp2 = 0; - - /* Get the registers values */ - tmp1 = I2C_ReadDeviceRegister(DeviceAddr, IOE_REG_GPIO_FE); - tmp2 = I2C_ReadDeviceRegister(DeviceAddr, IOE_REG_GPIO_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 & EDGE_FALLING) - { - tmp1 |= (uint8_t)IO_Pin; - } - - /* Enable the Rising edge if selected */ - if (Edge & EDGE_RISING) - { - tmp2 |= (uint8_t)IO_Pin; - } - - /* Write back the registers values */ - I2C_WriteDeviceRegister(DeviceAddr, IOE_REG_GPIO_FE, tmp1); - I2C_WriteDeviceRegister(DeviceAddr, IOE_REG_GPIO_RE, tmp2); - - /* if OK return 0 */ - return IOE_OK; -} - -/** - * @brief Configures the Interrupt line active state and format (level/edge) - * @param Polarity: could be - * @arg Polarity_Low: Interrupt line is active Low/Falling edge - * @arg Polarity_High: Interrupt line is active High/Rising edge - * @param Type: Interrupt line activity type, could be one of the following values - * @arg Type_Level: Interrupt line is active in level model - * @arg Type_Edge: Interrupt line is active in edge model - * @retval IOE_OK: if all initializations are OK. Other value if error. - */ -uint8_t IOE_ITOutConfig(uint8_t Polarity, uint8_t Type) -{ - uint8_t tmp = 0; - - /* Get the register IOE_REG_INT_CTRL value */ - tmp = I2C_ReadDeviceRegister(IOE_1_ADDR, IOE_REG_INT_CTRL); - - /* Mask the polarity and type bits */ - tmp &= ~(uint8_t)0x06; - - /* Modify the Interrupt Output line configuration */ - tmp |= (uint8_t)(Polarity | Type); - - /* Set the register */ - I2C_WriteDeviceRegister(IOE_1_ADDR, IOE_REG_INT_CTRL, tmp); - - /* If all OK return IOE_OK */ - return IOE_OK; -} - -/** - * @brief Writes a value in a register of the device through I2C. - * @param DeviceAddr: The address of the IOExpander, could be : IOE_1_ADDR. - * @param RegisterAddr: The target register adress - * @param RegisterValue: The target register value to be written - * @retval IOE_OK: if all operations are OK. Other value if error. - */ -uint8_t I2C_WriteDeviceRegister(uint8_t DeviceAddr, uint8_t RegisterAddr, uint8_t RegisterValue) -{ - uint32_t read_verif = 0; - uint8_t IOE_BufferTX = 0; - - /* Get Value to be written */ - IOE_BufferTX = RegisterValue; - - /* Configure DMA Peripheral */ - IOE_DMA_Config(IOE_DMA_TX, (uint8_t*)(&IOE_BufferTX)); - - /* Enable the I2C peripheral */ - I2C_GenerateSTART(IOE_I2C, ENABLE); - - /* Test on SB Flag */ - IOE_TimeOut = TIMEOUT_MAX; - while (I2C_GetFlagStatus(IOE_I2C,I2C_FLAG_SB) == RESET) - { - if (IOE_TimeOut-- == 0) return(IOE_TimeoutUserCallback()); - } - - /* Transmit the slave address and enable writing operation */ - I2C_Send7bitAddress(IOE_I2C, DeviceAddr, I2C_Direction_Transmitter); - - /* Test on ADDR Flag */ - IOE_TimeOut = TIMEOUT_MAX; - while (!I2C_CheckEvent(IOE_I2C, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED)) - { - if (IOE_TimeOut-- == 0) return(IOE_TimeoutUserCallback()); - } - - /* Transmit the first address for r/w operations */ - I2C_SendData(IOE_I2C, RegisterAddr); - - /* Test on TXE FLag (data dent) */ - IOE_TimeOut = TIMEOUT_MAX; - while ((!I2C_GetFlagStatus(IOE_I2C,I2C_FLAG_TXE)) && (!I2C_GetFlagStatus(IOE_I2C,I2C_FLAG_BTF))) - { - if (IOE_TimeOut-- == 0) return(IOE_TimeoutUserCallback()); - } - - /* Enable I2C DMA request */ - I2C_DMACmd(IOE_I2C,ENABLE); - - /* Enable DMA TX Channel */ - DMA_Cmd(IOE_DMA_TX_CHANNEL, ENABLE); - - /* Wait until DMA Transfer Complete */ - IOE_TimeOut = TIMEOUT_MAX; - while (!DMA_GetFlagStatus(IOE_DMA_TX_TCFLAG)) - { - if (IOE_TimeOut-- == 0) return(IOE_TimeoutUserCallback()); - } - - /* Wait until BTF Flag is set before generating STOP */ - IOE_TimeOut = 2 * TIMEOUT_MAX; - while ((!I2C_GetFlagStatus(IOE_I2C,I2C_FLAG_BTF))) - { - } - - /* Send STOP Condition */ - I2C_GenerateSTOP(IOE_I2C, ENABLE); - - /* Disable DMA TX Channel */ - DMA_Cmd(IOE_DMA_TX_CHANNEL, DISABLE); - - /* Disable I2C DMA request */ - I2C_DMACmd(IOE_I2C,DISABLE); - - /* Clear DMA TX Transfer Complete Flag */ - DMA_ClearFlag(IOE_DMA_TX_TCFLAG); - -#ifdef VERIFY_WRITTENDATA - /* Verify (if needed) that the loaded data is correct */ - - /* Read the just written register*/ - read_verif = I2C_ReadDeviceRegister(DeviceAddr, RegisterAddr); - /* Load the register and verify its value */ - if (read_verif != RegisterValue) - { - /* Control data wrongly tranfered */ - read_verif = IOE_FAILURE; - } - else - { - /* Control data correctly transfered */ - read_verif = 0; - } -#endif - - /* Return the verifying value: 0 (Passed) or 1 (Failed) */ - return read_verif; -} - -/** - * @brief Reads a register of the device through I2C. - * @param DeviceAddr: The address of the device, could be : IOE_1_ADDR. - * @param RegisterAddr: The target register adress (between 00x and 0x24) - * @retval The value of the read register (0xAA if Timout occured) - */ -uint8_t I2C_ReadDeviceRegister(uint8_t DeviceAddr, uint8_t RegisterAddr) -{ - uint8_t IOE_BufferRX[2] = {0x00, 0x00}; - - /* Configure DMA Peripheral */ - IOE_DMA_Config(IOE_DMA_RX, (uint8_t*)IOE_BufferRX); - - /* Enable DMA NACK automatic generation */ - I2C_DMALastTransferCmd(IOE_I2C, ENABLE); - - /* Enable the I2C peripheral */ - I2C_GenerateSTART(IOE_I2C, ENABLE); - - /* Test on SB Flag */ - IOE_TimeOut = TIMEOUT_MAX; - while (!I2C_GetFlagStatus(IOE_I2C,I2C_FLAG_SB)) - { - if (IOE_TimeOut-- == 0) return(IOE_TimeoutUserCallback()); - } - - /* Send device address for write */ - I2C_Send7bitAddress(IOE_I2C, DeviceAddr, I2C_Direction_Transmitter); - - /* Test on ADDR Flag */ - IOE_TimeOut = TIMEOUT_MAX; - while (!I2C_CheckEvent(IOE_I2C, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED)) - { - if (IOE_TimeOut-- == 0) return(IOE_TimeoutUserCallback()); - } - - /* Send the device's internal address to write to */ - I2C_SendData(IOE_I2C, RegisterAddr); - - /* Test on TXE FLag (data dent) */ - IOE_TimeOut = TIMEOUT_MAX; - while ((!I2C_GetFlagStatus(IOE_I2C,I2C_FLAG_TXE)) && (!I2C_GetFlagStatus(IOE_I2C,I2C_FLAG_BTF))) - { - if (IOE_TimeOut-- == 0) return(IOE_TimeoutUserCallback()); - } - - /* Send START condition a second time */ - I2C_GenerateSTART(IOE_I2C, ENABLE); - - /* Test on SB Flag */ - IOE_TimeOut = TIMEOUT_MAX; - while (!I2C_GetFlagStatus(IOE_I2C,I2C_FLAG_SB)) - { - if (IOE_TimeOut-- == 0) return(IOE_TimeoutUserCallback()); - } - - /* Send IOExpander address for read */ - I2C_Send7bitAddress(IOE_I2C, DeviceAddr, I2C_Direction_Receiver); - - /* Test on ADDR Flag */ - IOE_TimeOut = TIMEOUT_MAX; - while (!I2C_CheckEvent(IOE_I2C, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED)) - { - if (IOE_TimeOut-- == 0) return(IOE_TimeoutUserCallback()); - } - - /* Enable I2C DMA request */ - I2C_DMACmd(IOE_I2C,ENABLE); - - /* Enable DMA RX Channel */ - DMA_Cmd(IOE_DMA_RX_CHANNEL, ENABLE); - - /* Wait until DMA Transfer Complete */ - IOE_TimeOut = 2 * TIMEOUT_MAX; - while (!DMA_GetFlagStatus(IOE_DMA_RX_TCFLAG)) - { - if (IOE_TimeOut-- == 0) return(IOE_TimeoutUserCallback()); - } - - /* Send STOP Condition */ - I2C_GenerateSTOP(IOE_I2C, ENABLE); - - /* Disable DMA RX Channel */ - DMA_Cmd(IOE_DMA_RX_CHANNEL, DISABLE); - - /* Disable I2C DMA request */ - I2C_DMACmd(IOE_I2C,DISABLE); - - /* Clear DMA RX Transfer Complete Flag */ - DMA_ClearFlag(IOE_DMA_RX_TCFLAG); - - /* return a pointer to the IOE_Buffer */ - return (uint8_t)IOE_BufferRX[0]; -} - - -/** - * @brief Reads a buffer of 2 bytes from the device registers. - * @param DeviceAddr: The address of the device, could be : IOE_1_ADDR. - * @param RegisterAddr: The target register adress (between 00x and 0x24) - * @retval A pointer to the buffer containing the two returned bytes (in halfword). - */ -uint16_t I2C_ReadDataBuffer(uint8_t DeviceAddr, uint32_t RegisterAddr) -{ - uint8_t tmp= 0; - uint8_t IOE_BufferRX[2] = {0x00, 0x00}; - - /* Configure DMA Peripheral */ - IOE_DMA_Config(IOE_DMA_RX, (uint8_t*)IOE_BufferRX); - - /* Enable DMA NACK automatic generation */ - I2C_DMALastTransferCmd(IOE_I2C, ENABLE); - - /* Enable the I2C peripheral */ - I2C_GenerateSTART(IOE_I2C, ENABLE); - - /* Test on SB Flag */ - IOE_TimeOut = TIMEOUT_MAX; - while (!I2C_GetFlagStatus(IOE_I2C,I2C_FLAG_SB)) - { - if (IOE_TimeOut-- == 0) return(IOE_TimeoutUserCallback()); - } - - /* Send device address for write */ - I2C_Send7bitAddress(IOE_I2C, DeviceAddr, I2C_Direction_Transmitter); - - /* Test on ADDR Flag */ - IOE_TimeOut = TIMEOUT_MAX; - while (!I2C_CheckEvent(IOE_I2C, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED)) - { - if (IOE_TimeOut-- == 0) return(IOE_TimeoutUserCallback()); - } - - /* Send the device's internal address to write to */ - I2C_SendData(IOE_I2C, RegisterAddr); - - /* Test on TXE FLag (data dent) */ - IOE_TimeOut = TIMEOUT_MAX; - while ((!I2C_GetFlagStatus(IOE_I2C,I2C_FLAG_TXE)) && (!I2C_GetFlagStatus(IOE_I2C,I2C_FLAG_BTF))) - { - if (IOE_TimeOut-- == 0) return(IOE_TimeoutUserCallback()); - } - - /* Send START condition a second time */ - I2C_GenerateSTART(IOE_I2C, ENABLE); - - /* Test on SB Flag */ - IOE_TimeOut = TIMEOUT_MAX; - while (!I2C_GetFlagStatus(IOE_I2C,I2C_FLAG_SB)) - { - if (IOE_TimeOut-- == 0) return(IOE_TimeoutUserCallback()); - } - - /* Send IOExpander address for read */ - I2C_Send7bitAddress(IOE_I2C, DeviceAddr, I2C_Direction_Receiver); - - /* Test on ADDR Flag */ - IOE_TimeOut = TIMEOUT_MAX; - while (!I2C_CheckEvent(IOE_I2C, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED)) - { - if (IOE_TimeOut-- == 0) return(IOE_TimeoutUserCallback()); - } - - /* Enable I2C DMA request */ - I2C_DMACmd(IOE_I2C,ENABLE); - - /* Enable DMA RX Channel */ - DMA_Cmd(IOE_DMA_RX_CHANNEL, ENABLE); - - /* Wait until DMA Transfer Complete */ - IOE_TimeOut = 2 * TIMEOUT_MAX; - while (!DMA_GetFlagStatus(IOE_DMA_RX_TCFLAG)) - { - if (IOE_TimeOut-- == 0) return(IOE_TimeoutUserCallback()); - } - - /* Send STOP Condition */ - I2C_GenerateSTOP(IOE_I2C, ENABLE); - - /* Disable DMA RX Channel */ - DMA_Cmd(IOE_DMA_RX_CHANNEL, DISABLE); - - /* Disable I2C DMA request */ - I2C_DMACmd(IOE_I2C,DISABLE); - - /* Clear DMA RX Transfer Complete Flag */ - DMA_ClearFlag(IOE_DMA_RX_TCFLAG); - - /* Reorganize received data */ - tmp = IOE_BufferRX[0]; - IOE_BufferRX[0] = IOE_BufferRX[1]; - IOE_BufferRX[1] = tmp; - - /* return a pointer to the IOE_Buffer */ - return *(uint16_t *)IOE_BufferRX; -} - -/** - * @brief Return Touch Screen X position value - * @param None - * @retval X position. - */ -static uint16_t IOE_TS_Read_X(void) -{ - int32_t x, xr; - - x = I2C_ReadDataBuffer(IOE_1_ADDR, IOE_REG_TSC_DATA_Y); - - /* first correction */ - xr = (x * 320) >> 12; - /* second correction */ - xr = ((xr * 32)/29) - 17; - - if(xr <= 0) - xr = 0; - - return (uint16_t)(xr); -} - -/** - * @brief Return Touch Screen Y position value - * @param None - * @retval Y position. - */ -static uint16_t IOE_TS_Read_Y(void) -{ - int32_t y, yr; - y= I2C_ReadDataBuffer(IOE_1_ADDR, IOE_REG_TSC_DATA_X); - - yr= (y * 240) >> 12; - yr = ((yr * 240) / 217) - 12; - - if(yr <= 0) - yr = 0; - - return (uint16_t)(yr); -} - -/** - * @brief Return Touch Screen Z position value - * @param None - * @retval Z position. - */ -static uint16_t IOE_TS_Read_Z(void) -{ - uint32_t z; - z = I2C_ReadDataBuffer(IOE_1_ADDR, IOE_REG_TSC_DATA_Z); - - - if(z <= 0) - z = 0; - - return (uint16_t)(z); -} - -/** - * @brief Initializes the GPIO pins used by the IO expander. - * @param None - * @retval None - */ -static void IOE_GPIO_Config(void) -{ - GPIO_InitTypeDef GPIO_InitStructure; - - /* Enable IOE_I2C and IOE_I2C_PORT & Alternate Function clocks */ - RCC_APB1PeriphClockCmd(IOE_I2C_CLK, ENABLE); - RCC_APB2PeriphClockCmd(IOE_I2C_SCL_GPIO_CLK | IOE_I2C_SDA_GPIO_CLK | IOE_IT_GPIO_CLK - | RCC_APB2Periph_AFIO, ENABLE); - - /* Reset IOE_I2C IP */ - RCC_APB1PeriphResetCmd(IOE_I2C_CLK, ENABLE); - - /* Release reset signal of IOE_I2C IP */ - RCC_APB1PeriphResetCmd(IOE_I2C_CLK, DISABLE); - - /* IOE_I2C SCL and SDA pins configuration */ - GPIO_InitStructure.GPIO_Pin = IOE_I2C_SCL_PIN; - GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz; - GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD; - GPIO_Init(IOE_I2C_SCL_GPIO_PORT, &GPIO_InitStructure); - - /* IOE_I2C SCL and SDA pins configuration */ - GPIO_InitStructure.GPIO_Pin = IOE_I2C_SDA_PIN; - GPIO_Init(IOE_I2C_SDA_GPIO_PORT, &GPIO_InitStructure); - - /* Set EXTI pin as Input PullUp - IO_Expander_INT */ - GPIO_InitStructure.GPIO_Pin = IOE_IT_PIN; - GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU; - GPIO_Init(IOE_IT_GPIO_PORT, &GPIO_InitStructure); - - /* Connect IO Expander IT line to EXTI line */ - GPIO_EXTILineConfig(IOE_IT_EXTI_PORT_SOURCE, IOE_IT_EXTI_PIN_SOURCE); -} - - -/** - * @brief Configure the I2C Peripheral used to communicate with IO_Expanders. - * @param None - * @retval None - */ -static void IOE_I2C_Config(void) -{ - I2C_InitTypeDef I2C_InitStructure; - - /* IOE_I2C configuration */ - I2C_InitStructure.I2C_Mode = I2C_Mode_I2C; - I2C_InitStructure.I2C_DutyCycle = I2C_DutyCycle_2; - I2C_InitStructure.I2C_OwnAddress1 = 0x00; - I2C_InitStructure.I2C_Ack = I2C_Ack_Enable; - I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit; - I2C_InitStructure.I2C_ClockSpeed = IOE_I2C_SPEED; - - I2C_Init(IOE_I2C, &I2C_InitStructure); -} - - -/** - * @brief Configure the DMA Peripheral used to handle communication via I2C. - * @param None - * @retval None - */ - -static void IOE_DMA_Config(IOE_DMADirection_TypeDef Direction, uint8_t* buffer) -{ - DMA_InitTypeDef DMA_InitStructure; - - RCC_AHBPeriphClockCmd(IOE_DMA_CLK, ENABLE); - - /* Initialize the DMA_PeripheralBaseAddr member */ - DMA_InitStructure.DMA_PeripheralBaseAddr = IOE_I2C_DR; - /* Initialize the DMA_MemoryBaseAddr member */ - DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)buffer; - /* Initialize the DMA_PeripheralInc member */ - DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable; - /* Initialize the DMA_MemoryInc member */ - DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable; - /* Initialize the DMA_PeripheralDataSize member */ - DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte; - /* Initialize the DMA_MemoryDataSize member */ - DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte; - /* Initialize the DMA_Mode member */ - DMA_InitStructure.DMA_Mode = DMA_Mode_Normal; - /* Initialize the DMA_Priority member */ - DMA_InitStructure.DMA_Priority = DMA_Priority_VeryHigh; - /* Initialize the DMA_M2M member */ - DMA_InitStructure.DMA_M2M = DMA_M2M_Disable; - - /* If using DMA for Reception */ - if (Direction == IOE_DMA_RX) - { - /* Initialize the DMA_DIR member */ - DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC; - - /* Initialize the DMA_BufferSize member */ - DMA_InitStructure.DMA_BufferSize = 2; - - DMA_DeInit(IOE_DMA_RX_CHANNEL); - - DMA_Init(IOE_DMA_RX_CHANNEL, &DMA_InitStructure); - } - /* If using DMA for Transmission */ - else if (Direction == IOE_DMA_TX) - { - /* Initialize the DMA_DIR member */ - DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST; - - /* Initialize the DMA_BufferSize member */ - DMA_InitStructure.DMA_BufferSize = 1; - - DMA_DeInit(IOE_DMA_TX_CHANNEL); - - DMA_Init(IOE_DMA_TX_CHANNEL, &DMA_InitStructure); - } -} - -/** - * @brief Configures the IO expander Interrupt line and GPIO in EXTI mode. - * @param None - * @retval None - */ -static void IOE_EXTI_Config(void) -{ - GPIO_InitTypeDef GPIO_InitStructure; - NVIC_InitTypeDef NVIC_InitStructure; - EXTI_InitTypeDef EXTI_InitStructure; - - /* Enable Button GPIO clock */ - RCC_APB2PeriphClockCmd(IOE_IT_GPIO_CLK | RCC_APB2Periph_AFIO, ENABLE); - - /* Configure Button pin as input floating */ - GPIO_InitStructure.GPIO_Pin = IOE_IT_PIN; - GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; - GPIO_Init(IOE_IT_GPIO_PORT, &GPIO_InitStructure); - - /* Connect Button EXTI Line to Button GPIO Pin */ - GPIO_EXTILineConfig(IOE_IT_EXTI_PORT_SOURCE, IOE_IT_EXTI_PIN_SOURCE); - - /* Configure Button EXTI line */ - EXTI_InitStructure.EXTI_Line = IOE_IT_EXTI_LINE; - EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt; - EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling; - EXTI_InitStructure.EXTI_LineCmd = ENABLE; - EXTI_Init(&EXTI_InitStructure); - - /* Enable and set Button EXTI Interrupt to the lowest priority */ - NVIC_InitStructure.NVIC_IRQChannel = IOE_IT_EXTI_IRQn; - NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x0F; - NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x0F; - NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; - NVIC_Init(&NVIC_InitStructure); -} - -#ifndef USE_Delay -/** - * @brief Inserts a delay time. - * @param nCount: specifies the delay time length. - * @retval None - */ -static void delay(__IO uint32_t nCount) -{ - __IO uint32_t index = 0; - for(index = (100000 * nCount); index != 0; index--) - { - } -} -#endif /* USE_Delay*/ -/** - * @} - */ - -/** - * @} - */ - -/** - * @} - */ - -/** - * @} - */ - -/** - * @} - */ - -/******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/ |