在8051单片机片外扩62256芯片(32K Bytes RAM),将其映射到8051芯片的外部数据空间地址并编程实现对62256芯片RAM自检,在P1.0口驱动绿色LED,P1.1口驱动红色LED,当自检通过时绿色LED每秒闪烁1次,红色LED不亮;当自检不通过时红色LED每秒闪烁2次,绿色LED不亮。
1条回答 默认 最新
- qllaoda 2023-05-24 14:01关注
#include <reg51.h> #define EXTERNAL_RAM_SIZE 32768 // 32KB #define TEST_PATTERN 0xAA // Test pattern for write and read operations unsigned char external_ram[EXTERNAL_RAM_SIZE]; void delay() { // Delay function (adjust the value depending on the clock frequency) for (int i = 0; i < 50000; i++); } void selfTestPassed() { P1 &= ~(1 << 1); // Turn off the red LED while (1) { P1 ^= (1 << 0); // Toggle the green LED delay(); } } void selfTestFailed() { P1 &= ~(1 << 0); // Turn off the green LED while (1) { P1 ^= (1 << 1); // Toggle the red LED delay(); delay(); } } void main() { // Configure P1.0 and P1.1 as output pins for driving LEDs P1 = P1 & 0xFC; // Write test pattern to external RAM for (int i = 0; i < EXTERNAL_RAM_SIZE; i++) { external_ram[i] = TEST_PATTERN; } // Read and verify test pattern from external RAM for (int i = 0; i < EXTERNAL_RAM_SIZE; i++) { if (external_ram[i] != TEST_PATTERN) { selfTestFailed(); // Perform actions for self-test failure } } selfTestPassed(); // Perform actions for self-test success while(1){} }
解决 1无用
悬赏问题
- ¥15 vue3前端取消收藏的不会引用collectId
- ¥15 有关类的报错,在模块里调用另一个模块的方法下的变量时出错
- ¥15 delphi7 HMAC_SHA256方式加密
- ¥15 关于#qt#的问题:我想实现qcustomplot完成坐标轴
- ¥15 下列c语言代码为何输出了多余的空格
- ¥15 kali linux用wget archive.kali.org/archive-key.asc指令下载签名无效(失败)
- ¥15 openHarmony 利用c++程序在dayu210开发板上实现拉取RTSP视频流并且在屏幕上显示
- ¥15 GD32H757的can通信配置
- ¥20 nist随机数测试的问题
- ¥20 帮我解决这个项目,thank you各位程序员