led_matrix/main/ulp/main.c

#include <stdio.h>
#include <stdint.h>
#include <stdbool.h>
#include "ulp_riscv.h"
#include "ulp_riscv_utils.h"
#include "ulp_riscv_gpio.h"
#include "soc/rtc_io_reg.h"
#include "ulp_riscv_register_ops.h"

#define HUB75_OE_CAPTRUE__RTC_PIN_NUM     GPIO_NUM_18
#define HUB75_LINE_ADDR_A_RTC_PIN_NUM     GPIO_NUM_16
#define HUB75_LINE_ADDR_B_RTC_PIN_NUM     GPIO_NUM_15
#define HUB75_LINE_ADDR_C_RTC_PIN_NUM     GPIO_NUM_14
#define HUB75_LINE_ADDR_D_RTC_PIN_NUM     GPIO_NUM_13

#define OE_CAPTRUE_RTC_PIN_NUM_REG_BIT    (1 << (HUB75_OE_CAPTRUE__RTC_PIN_NUM + 10))

volatile int set_addr_request = 0;
volatile int oe_disable_val = 1;
volatile int addr_reg_bit_val = 0;

int main (void)
{
    if (oe_disable_val) goto OE_HIGH_DISABLE;
    else goto OE_LOW_DISABLE;

OE_HIGH_DISABLE:
    while(1) {
        while (!set_addr_request);  /* 等待地址设置请求 */
        while (!(REG_READ(RTC_GPIO_IN_REG) & OE_CAPTRUE_RTC_PIN_NUM_REG_BIT));  /* 等待oe高电平disable信号 */

        REG_WRITE(RTC_GPIO_OUT_REG, addr_reg_bit_val); /* CPU程序应采用读修改写方式，防止影响寄存器其他位 */
        set_addr_request = 0;   
    }

OE_LOW_DISABLE:
    while(1) {
        while (!set_addr_request); 
        while ((REG_READ(RTC_GPIO_IN_REG) & OE_CAPTRUE_RTC_PIN_NUM_REG_BIT));  /* 等待oe低电平disable信号 */
        
        REG_WRITE(RTC_GPIO_OUT_REG, addr_reg_bit_val); 
        set_addr_request = 0;
    }
  
    return 0;
}