0、路径

\os\qcc514x_qcc304x\hydra_os\src\fw\src\customer\core\trap_api\trap_api_core_pio.c

os\qcc514x_qcc304x\hydra_os\src\fw\src\gen\customer\core\trap_api\pio.h

1、相关PIO API

1.1、获取PIO的bank

1.1.1 自定义

#define PIO2BANK(pio) ((uint16)((pio) / 32))

1.1.2 SDK提供

#define PioCommonPioBank(_pio) ((_pio) / PIOS_PER_BANK)

1.2、获取PIO的mask（bank中对应的bit）

1.2.1 自定义

#define PIO2MASK(pio) (1UL << ((pio) % 32))

1.2.2 SDK提供

#define PioCommonPioMask(_pio) (1UL << ((_pio) % PIOS_PER_BANK))

1.3、绑定bank和对应的mask

/**
* \brief Maps PIOs as software or hardware controlled.
* Before using a PIO as a software controlled digital IO a call to this
* function is required. Not mapping the PIO may cause other functions in the
* PIO trap API to return errors and not produce the required behaviour.
* To put a PIO under HW control the app needs to call this function first and
* then PioSetFunction to select the HW functionality needed.
* Please note that there is no default state, all PIOs should be considered
* unmapped and unusable until they are configured by a call to this function.
* \param bank PIO bank number.
* \param mask Each bit in the mask corresponds to a PIO line. Bits set to 1 in this mask will
* be modified. Bits set to 0 in this mask will not be modified.
* \param bits Each bit corresponds to a PIO line. A bit set to 1 will cause a PIO to be
* behave as a software controlled pin. A bit set to 0 will result in the pio
* being marked as controlled by a hardware peripheral.
* \return A 32 bit mask. If any bit in this mask is high then that PIO could not be
* mapped or unmapped; note that no action will have been taken on any PIOs.
*
* \ingroup trapset_core
*/

function prototype：

uint32 PioSetMapPins32Bank(uint16 bank, uint32 mask, uint32 bits)；

传入的实际参数按照顺序为：bank, mask, mask

1.4、设置输入输出模式

/**
* \brief Set PIOs as inputs or outputs.
*
* Note that all PIOs must be mapped in before they can be used.
* See the PioSetMapPins32Bank() documentation for information on valid PIO
* directions
* and PIO mapping.
* \param bank PIO bank number.
* \param mask Each bit in the mask corresponds to a PIO line. Bits set to 1 in this mask will
* be modified. Bits set to 0 in this mask will not be modified.
* \param dir Each bit in the "dir" value corresponds to a PIO line. Bits set to 1 in this
* value will result in that PIO line being configured as an output. Bits set to
* 0 in this value will result in that PIO line being configured as an input.
* \return A 32 bit mask. If any bit in this mask is high then that PIO could not be set
* to the direction specified; note that no action will have been taken on any
* PIOs.
*
* \ingroup trapset_core
*/

function prototype：

uint32 PioSetDir32Bank(uint16 bank, uint32 mask, uint32 dir)；

参数dir的值决定了PIO的方向：

mask：output(输出)
0：input(输入)

1.5、设置管脚电平

/**
* \brief Modifies the contents of the PIO data output register. PIO pins must be set to
* outputs via PioSetDir32Bank() before they can be driven high or low through
* this trap. This trap also sets pull direction for PIOs used as inputs.
*
* Note that all PIOs must be mapped in before they can be used.
* See the PioSetMapPins32Bank() documentation for information on valid PIO
* directions
* and PIO mapping.
* BlueCore has internal resistors which can be configured to either pull-up or
* pull-down the pins used for input. This is controlled by the value
* written to the output register using PioSet32Bank().
* The resistors pull-down if the value is zero, and pull-up otherwise, so the
* following fragment sets pins 1 and 2 to inputs with pin 1 configured to
* pull-up and pin 2 configured to pull-down.
* \code
* PioSet32Bank(0, 2|4, 2);
* PioSetDir32Bank(0, 2|4, 0);
* \endcode
* \param bank PIO bank number.
* \param mask Each bit in the mask corresponds to a PIO line. Bits set to 1 in this mask will
* be modified. Bits set to 0 in this mask will not be modified.
* \param bits Each bit in the "bits" value corresponds to a PIO line. Bits set to 1 in this
* value will result in that PIO line being driven high. Bits set to 0 in this
* value will result in that PIO line being driven low.
* \return A 32 bit mask. If any bit in this mask is high then that PIO could not be
* driven to the level specified; note that no action will have been taken on any
* PIOs.
*
* \ingroup trapset_core
*/

function prototype：

uint32 PioSet32Bank(uint16 bank, uint32 mask, uint32 bits)；

参数bits的值决定了PIO的电平：

mask：high（高电平）
0：low(低电平)

NOTE：当对应的管脚在调用该接口之前，已经设置为输入模式时候，那么此时设置的高低电平表示pull down or pull up，

0：pull down（下拉）

1：pull up（上拉）

1.6 获取电平状态

/**
* \brief Returns the contents of one of the PIO data input registers. For PIOs set as
* outputs, this function will return the value last written using
* PioSet32Bank().
* \param bank PIO bank number.
*
* \ingroup trapset_core
*/

function prototype：

uint32 PioGet32Bank(uint16 bank)；

bank：表示读取的bank，返回的是整个bank pio的状态，需要用对应pio的mask来获取对应pio的状态。

1.7 设置管脚功能

/**
* \brief Sets a supported function for particular pio pin
* if a pin can be mapped as LED, UART, BITSERIAL, ANALOGUE etc, then this
* function can be used to set the pin for one of the supported functions.
* Consult the device's data sheet to understand what functions are supported
* for each PIO pins.
* A pin can support only few functions. Trying to set a function which is NOT
* supported by the pin will return FALSE without affecting/modifying the
* existing pin function.
* Before this trap can be used, it is necessary to use PioSetMapPins32Bank to
* put the PIO in HW mode.
* For functions corresponding to other susbystems the OTHER function ID must be
* used. This reverts the PIOs to the initial unmapped state. Any further use by
* the app needs remapping.
* PioSetFunction() Usage Example:
* if PIO[20] can be mapped to UART/BITSERIAL/LED/PIO and currently PIO[20] is
* mapped as PIO, then App should call the PioSetMapPins32Bank() to unmap it
* from PIO and then call PioSetFunction() to map to (UART/BITSERIAL/LED/PIO)
* function.
* Unmap PIO[20] so that it can be mapped to a function
* PioSetMapPins32Bank(0, 1<<20, 0<<20);
* This will map PIO[20] line as UART_RX
* PioSetFunction(20, UART_RX);

*

*
* To map back the PIO[20] as a PIO, PioSetMapPins32Bank() should be used.
* PioSetMapPins32Bank(0, 1<<20, 1<<20);
* \param pin Pin that requires a function change; the pin value ranges from 0 to 95.
* \param function Supported function that needs to be set for the specified pin. Refer
* \#pin_function_id
* \return TRUE if successful, else FALSE.
*
* \ingroup trapset_core
*/

bool PioSetFunction(uint16 pin, pin_function_id function);

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QCC3040---PIO的配置方法

0、路径

1、相关PIO API

1.1、获取PIO的bank

1.1.1 自定义

1.1.2 SDK提供

1.2、获取PIO的mask（bank中对应的bit）

1.2.1 自定义

1.2.2 SDK提供

1.3、绑定bank和对应的mask

1.4、设置输入输出模式

1.5、设置管脚电平

1.6 获取电平状态

1.7 设置管脚功能

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