rt-thread-official/bsp/wch/risc-v/Libraries/ch56x_drivers/ch56x_gpio.h

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/*
* Copyright (c) 2006-2022, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2022-07-15 Emuzit first version
*/
#ifndef __CH56X_GPIO_H__
#define __CH56X_GPIO_H__
#include "soc.h"
#ifdef __cplusplus
extern "C" {
#endif
/* Fixed linear mapping : 32 pins per port, for ports A,B,C,D...
*/
#define GET_PIN(port,pin) (GPIO_P##port##_PIN_START + pin)
#ifdef SOC_SERIES_CH569
#define GPIO_INT_PINS { \
GET_PIN(A,2), GET_PIN(A,3), GET_PIN(A,4), GET_PIN(B,3), \
GET_PIN(B,4), GET_PIN(B,11), GET_PIN(B,12), GET_PIN(B,15) \
}
#else
#define GPIO_INT_PINS { \
GET_PIN(A,3), GET_PIN(A,4), GET_PIN(A,6), GET_PIN(A,10), \
GET_PIN(A,11), GET_PIN(A,12), GET_PIN(B,4), GET_PIN(B,10), \
}
#endif
/*
* R8_GPIO_INT_FLAG / R8_GPIO_INT_STATUS (CH567,CH568):
* write 1 to specific bit to clear int flag
*
* R8_GPIO_INT_ENABLE:
* To use EXTIx function, pin should be set as input.
* For wakeup function, also set RB_SLP_GPIO_WAKE.
*
* R8_GPIO_INT_MODE:
* R8_GPIO_INT_POLAR:
*/
#if defined(SOC_SERIES_CH569)
union _gpio_interrupt
{
uint8_t reg;
struct
{
uint8_t pa2 : 1;
uint8_t pa3 : 1;
uint8_t pa4 : 1;
uint8_t pb3 : 1;
uint8_t pb4 : 1;
uint8_t pb11 : 1;
uint8_t pb12 : 1;
uint8_t pb15 : 1;
};
};
#else
union _gpio_interrupt
{
uint8_t reg;
struct
{
uint8_t pa3 : 1;
uint8_t pa4 : 1;
uint8_t pa6 : 1;
uint8_t pa10 : 1;
uint8_t pa11 : 1;
uint8_t pa12 : 1;
uint8_t pb4 : 1;
uint8_t pb10 : 1;
};
};
#endif
#define GPIO_IE_DISABLE 0
#define GPIO_IE_ENABLE 1
#define GPIO_IM_LEVEL 0
#define GPIO_IM_EDGE 1
#define GPIO_IP_LOW_FALLING 0
#define GPIO_IP_HIGH_RISING 1
/*
* R8_PIN_ALTERNATE (CH569) : reset value is 0x01
* R8_PORT_PIN (CH567/CH568) : reset value is 0x00
*/
union _gpio_pin_alternate
{
uint8_t reg;
struct
{
uint8_t pin_mii : 1; // RW, ETH uses RMII/RGMII (CH565W/CH569W)
uint8_t pin_tmr1 : 1; // RW, TMR1/PWM5/CAP1 remapping
uint8_t pin_tmr2 : 1; // RW, TMR2/PWM6/CAP2 remapping
uint8_t resv_3 : 1;
uint8_t pin_uart0 : 1; // RW, RXD0/TXD0 remapping
uint8_t pin_uart1 : 1; // RW, CH567 only
uint8_t resv_6 : 2;
};
};
#define RB_PIN_MII 0x01
#define RB_PIN_TMR1 0x02
#define RB_PIN_TMR2 0x04
#define RB_PIN_UART0 0x10
#define RB_PIN_UART1 0x20
#ifdef SOC_SERIES_CH569
#define GPIO_ALT_RMII 0
#define GPIO_ALT_RGMII 1
#define GPIO_ALT_TMR1_PB15 0
#define GPIO_ALT_TMR1_PB0 1
#define GPIO_ALT_TMR2_PA4 0
#define GPIO_ALT_TMR2_PB3 1
#define GPIO_ALT_UART0_PB5_6 0
#define GPIO_ALT_UART0_PA5_6 1
#else
#define GPIO_ALT_TMR1_PA10 0
#define GPIO_ALT_TMR1_PB2 1
#define GPIO_ALT_TMR2_PA11 0
#define GPIO_ALT_TMR2_PB11 1
#define GPIO_ALT_UART0_PB4_7 0
#define GPIO_ALT_UART0_PA15_14 1
#define GPIO_ALT_UART1_PA8_9 0
#define GPIO_ALT_UART1_PB8_9 1
#endif
struct gpio_px_regs
{
uint32_t DIR; // reset value for pins is 0, input pins
uint32_t PIN; // RO
uint32_t OUT; // reset value is 0
uint32_t CLR; // reset value is 0
uint32_t PU; // reset value is 0
uint32_t PD; // reset value is 0
uint32_t DRV; // reset value for pins is 0, 8mA
uint32_t SMT; // reset value for pins is 1, enable schmitt trigger
} __packed;
CHECK_STRUCT_SIZE(struct gpio_px_regs, 0x20);
#define GPIO_PX_DIR_IN 0
#define GPIO_PX_DIR_OUT 1
#define GPIO_PX_PU_DISABLE 0
#define GPIO_PX_PU_ENABLE 1
#define GPIO_PX_PD_DISABLE 0 // for DIR_IN
#define GPIO_PX_PD_ENABLE 1 // for DIR_IN
#define GPIO_PX_PD_PUSH_PULL 0 // for DIR_OUT
#define GPIO_PX_PD_OPEN_DRAIN 1 // for DIR_OUT
#define GPIO_PX_DRV_8mA 0
#define GPIO_PX_DRV_16mA 1
#define GPIO_PX_SMT_DISABLE 0
#define GPIO_PX_SMT_SLOW 1 // for DIR_OUT
#define GPIO_PX_SMT_ENABLE 1 // for DIR_IN
/*
* 0x12 R8_PIN_ALTERNATE: GPIO multi-use remapping register
* 0x1c R8_GPIO_INT_FLAG: GPIO interrupt flag register
* 0x1d R8_GPIO_INT_ENABLE: GPIO interrupt enable register
* 0x1e R8_GPIO_INT_MODE: GPIO interrupt mode register
* 0x1f R8_GPIO_INT_POLAR: GPIO interrupt polarity register
*
* 0x40 R32_PA_DIR: PA pin direction control
* 0x44 R32_PA_PIN: PA pin input status
* 0x48 R32_PA_OUT: PA pin output register
* 0x4c R32_PA_CLR: PA pin output clear
* 0x50 R32_PA_PU: PA pin pull-up resistor enable register
* 0x54 R32_PA_PD: PA pin open drain output / input pull-down control
* 0x58 R32_PA_DRV: PA pin output driving capability register
* 0x5c R32_PA_SMT: PA pin slow output / schmitt trigger input control
*
* 0x60 R32_PB_DIR:
* 0x64 R32_PB_PIN:
* 0x68 R32_PB_OUT:
* 0x6c R32_PB_CLR:
* 0x70 R32_PB_PU:
* 0x74 R32_PB_PD:
* 0x78 R32_PB_DRV:
* 0x7c R32_PB_SMT:
*
* CAVEAT: gcc (as of 8.2.0) tends to read 32-bit word for bit field test.
* Be careful for those with side effect for read.
*/
struct gpio_registers
{
uint32_t resv_00[4];
uint8_t resv_10[2];
union _gpio_pin_alternate PIN_ALTERNATE;
uint8_t resv_13;
uint32_t resv_14[2];
union _gpio_interrupt INT_FLAG;
union _gpio_interrupt INT_ENABLE;
union _gpio_interrupt INT_MODE;
union _gpio_interrupt INT_POLAR;
uint32_t resv_20[8];
struct gpio_px_regs PA;
struct gpio_px_regs PB;
} __packed;
CHECK_STRUCT_SIZE(struct gpio_registers, 0x80);
#ifdef __cplusplus
}
#endif
#endif