49 lines
1.4 KiB
C
49 lines
1.4 KiB
C
#include <stdio.h>
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#include <stdint.h>
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#include <stdbool.h>
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#include "ulp_riscv.h"
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#include "ulp_riscv_utils.h"
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#include "ulp_riscv_gpio.h"
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#include "soc/rtc_io_reg.h"
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#include "ulp_riscv_register_ops.h"
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#define HUB75_OE_CAPTRUE__RTC_PIN_NUM GPIO_NUM_18
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#define HUB75_LINE_ADDR_A_RTC_PIN_NUM GPIO_NUM_16
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#define HUB75_LINE_ADDR_B_RTC_PIN_NUM GPIO_NUM_15
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#define HUB75_LINE_ADDR_C_RTC_PIN_NUM GPIO_NUM_14
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#define HUB75_LINE_ADDR_D_RTC_PIN_NUM GPIO_NUM_13
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#define OE_CAPTRUE_RTC_PIN_NUM_REG_BIT (1 << (HUB75_OE_CAPTRUE__RTC_PIN_NUM + 10))
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volatile int set_addr_request = 0;
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volatile int oe_disable_val = 1;
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volatile int addr_reg_bit_val = 0;
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int main (void)
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{
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if (oe_disable_val) goto OE_HIGH_DISABLE;
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else goto OE_LOW_DISABLE;
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OE_HIGH_DISABLE:
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while(1) {
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while (!set_addr_request); /* 等待地址设置请求 */
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while (!(REG_READ(RTC_GPIO_IN_REG) & OE_CAPTRUE_RTC_PIN_NUM_REG_BIT)); /* 等待oe高电平disable信号 */
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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 */
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set_addr_request = 0;
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}
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OE_LOW_DISABLE:
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while(1) {
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while (!set_addr_request);
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while ((REG_READ(RTC_GPIO_IN_REG) & OE_CAPTRUE_RTC_PIN_NUM_REG_BIT)); /* 等待oe低电平disable信号 */
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REG_WRITE(RTC_GPIO_OUT_REG, addr_reg_bit_val);
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set_addr_request = 0;
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}
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return 0;
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}
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