luchianmihai/walnux
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

arch/arm/rp2040: Implement GPIO output override functionality

Browse source 
Add support for the RP2040's GPIO output override capabilities.
Implementation inspired by the uniqueid functions for the same arch.

Signed-off-by: Niccolò Maggioni <nicco.maggioni+nuttx@gmail.com>
This commit is contained in:
Niccolò Maggioni 2025-08-11 14:28:39 +02:00 • committed by Xiang Xiao
parent 8a157d7514
commit fa9f771a0f
1 changed files with 43 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

43
arch/arm/src/rp2040/rp2040_gpio.h
View file

@ -43,6 +43,10 @@
#define RP2040_GPIO_NUM 30 /* Number of GPIO pins */
#define REG_ALIAS_XOR_BITS (0x1u << 12u)
#define hw_alias_check_addr(addr) ((uintptr_t)(addr))
#define hw_xor_alias_untyped(addr) ((void *)(REG_ALIAS_XOR_BITS | hw_alias_check_addr(addr)))
/* GPIO function types ******************************************************/
#define RP2040_GPIO_FUNC_JTAG RP2040_IO_BANK0_GPIO_CTRL_FUNCSEL_JTAG
@ -71,6 +75,13 @@
#define RP2040_GPIO_INTR_EDGE_LOW (0x4)
#define RP2040_GPIO_INTR_EDGE_HIGH (0x8)
/* GPIO override modes ******************************************************/
#define RP2040_GPIO_OVERRIDE_NORMAL 0
#define RP2040_GPIO_OVERRIDE_INVERT 1
#define RP2040_GPIO_OVERRIDE_LOW 2
#define RP2040_GPIO_OVERRIDE_HIGH 3
/****************************************************************************
* Public Types
****************************************************************************/
@ -189,6 +200,38 @@ static inline void rp2040_gpio_set_drive_strength(uint32_t gpio,
RP2040_PADS_BANK0_GPIO(gpio));
}
always_inline_function static void hw_xor_bits(uint32_t *addr, uint32_t mask)
{
*(uint32_t *) hw_xor_alias_untyped((volatile void *)addr) = mask;
}
always_inline_function static void hw_write_masked(uint32_t *addr,
uint32_t values, uint32_t write_mask)
{
hw_xor_bits(addr, (*addr ^ values) & write_mask);
}
/****************************************************************************
* Name: rp2040_gpio_set_outover
*
* Description:
* Set whether the pin's output override will be enabled.
* See the RP2040_GPIO_OVERRIDE_* constants.
*
****************************************************************************/
static inline void rp2040_gpio_set_outover(uint32_t gpio, uint32_t outover)
{
DEBUGASSERT(gpio < RP2040_GPIO_NUM);
DEBUGASSERT(outover <= RP2040_GPIO_OVERRIDE_HIGH);
hw_write_masked(
(uint32_t *)(RP2040_IO_BANK0_BASE + (0x08 * gpio) + 0x04),
outover << RP2040_IO_BANK0_GPIO_CTRL_OUTOVER_SHIFT,
RP2040_IO_BANK0_GPIO_CTRL_OUTOVER_MASK
);
}
/****************************************************************************
* Public Function Prototypes
****************************************************************************/