CC2538: how to get Beagle Bone Black GPIO_SRDY & GPIO_MRDY Pins.

shiv patil

Genius 3356 points

Part Number: CC2538

Hello E2E Community,

I am trying to implement SPI interface on CC2538 ZNP device.

For that I am studding the following documentation & HA 1.2.2a ZNP application code.

As mentioned in NPI_Gateway.cfg SRDY MRDY pins are configure as follows.

[GPIO_SRDY.GPIO]
value="/sys/class/gpio/gpio132/value"
direction="/sys/class/gpio/gpio132/direction"
active_high_low=1 ; (Active Low=0, Active High=1)

[GPIO_SRDY.LEVEL_SHIFTER]
value="/sys/class/gpio/gpio137/value"
direction="/sys/class/gpio/gpio137/direction"
active_high_low=1 ; (Active Low=0, Active High=1)

[GPIO_MRDY.GPIO]
value="/sys/class/gpio/gpio135/value"
direction="/sys/class/gpio/gpio135/direction"
active_high_low=1 ; (Active Low=0, Active High=1)

[GPIO_MRDY.LEVEL_SHIFTER]
value="/sys/class/gpio/gpio136/value"
direction="/sys/class/gpio/gpio136/direction"
active_high_low=1 ; (Active Low=0, Active High=1)

what is the use case of LEVEL_SHIFTER pins??..

are LEVEL_SHIFTER pins are connected some were or we just need to configure them & let them Open?...

over 6 years ago

0 Toby over 6 years ago

TI__Mastermind 35070 points

Hi,

This is not necessary for SPI mode, as indicated by the following code from hal_gpio.h:

/*******************************************/

/*** We will be using SPI mode so no need to support MRDY and SRDY ***/

#define HAL_RNP_MRDY_CFG() HalGpioMrdyInit(0)

#define HAL_RNP_MRDY_CLR() HalGpioMrdySet(0)

#define HAL_RNP_MRDY_SET() HalGpioMrdySet(1)

#define HAL_RNP_SRDY_CFG() HalGpioSrdyInit(0)

#define HAL_RNP_SRDY_CLR() HalGpioSrdyCheck(0)
#define HAL_RNP_SRDY_SET() HalGpioSrdyCheck(1)

#define HAL_RNP_SRDY_RX() HAL_RNP_SRDY_SET()
#define HAL_RNP_SRDY_TX() HAL_RNP_SRDY_CLR()

Regards,
Toby

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CC2538: how to get Beagle Bone Black GPIO_SRDY & GPIO_MRDY Pins.