8051和DAC0832输出三角波，用汇编语言编写

好的，以下是8051和DAC0832输出三角波的汇编代码：

ORG 0H 
MOV DPTR, #LUT ; 将数据指针指向三角波LUT
MOV R0, #0H ; 初始化计数器
MOV A, R0 ; 将计数器值存入累加器
MOVX @DPTR, A ; 将累加器值存入LUT
INC DPTR ; 将指针指向下一个位置
DJNZ R0, $ ; 计数器自减，如果不为0则跳转
SETB P1.0 ; 将P1.0置高，启动DAC0832
SETB P1.1 ; 将P1.1置高，启动DAC0832
MOV DPTR, #LUT ; 将指针再次指向LUT
MOV R0, #0H ; 重新初始化计数器
LOOP: 
MOVX A, @DPTR ; 从LUT中读取数据
MOV R1, A ; 将数据存入R1
INC DPTR ; 将指针指向下一个位置
MOV A, R1 ; 将数据存入累加器
ACALL SEND_DAC ; 将累加器值发送到DAC0832
DJNZ R0, LOOP ; 计数器自减，如果不为0则跳转
CLR P1.0 ; 将P1.0置低，关闭DAC0832
CLR P1.1 ; 将P1.1置低，关闭DAC0832
SJMP $ ; 无限循环

LUT: ; 三角波LUT
DB 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239, 240, 241, 242, 243, 244, 245, 246, 247, 248, 249, 250, 251, 252, 253, 254, 255, 254, 253, 252, 251, 250, 249, 248, 247, 246, 245, 244, 243, 242, 241, 240, 239, 238, 237, 236, 235, 234, 233, 232, 231, 230, 229, 228, 227, 226, 225, 224, 223, 222, 221, 220, 219, 218, 217, 216, 215, 214, 213, 212, 211, 210, 209, 208, 207, 206, 205, 204, 203, 202, 201, 200, 199, 198, 197, 196, 195, 194, 193, 192, 191, 190, 189, 188, 187, 186, 185, 184, 183, 182, 181, 180, 179, 178, 177, 176, 175, 174, 173, 172, 171, 170, 169, 168, 167, 166, 165, 164, 163, 162, 161, 160, 159, 158, 157, 156, 155, 154, 153, 152, 151, 150, 149, 148, 147, 146, 145, 144, 143, 142, 141, 140, 139, 138, 137, 136, 135, 134, 133, 132, 131, 130, 129, 128, 127, 126, 125, 124, 123, 122, 121, 120, 119, 118, 117, 116, 115, 114, 113, 112, 111, 110, 109, 108, 107, 106, 105, 104, 103, 102, 101, 100, 99, 98, 97, 96, 95, 94, 93, 92, 91, 90, 89, 88, 87, 86, 85, 84, 83, 82, 81, 80, 79, 78, 77, 76, 75, 74, 73, 72, 71, 70, 69, 68, 67, 66, 65, 64, 63, 62, 61, 60, 59, 58, 57, 56, 55, 54, 53, 52, 51, 50, 49, 48, 47, 46, 45, 44, 43, 42, 41, 40, 39, 38, 37, 36, 35, 34, 33, 32, 31, 30, 29, 28, 27, 26, 25, 24, 23, 22, 21, 20, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0 

SEND_DAC: ; 发送数据到DAC0832
MOV A, R1 ; 将数据存入累加器
MOV P2, A ; 将数据发送到P2口
CLR P1.2 ; 将P1.2置低
SETB P1.2 ; 将P1.2置高，将数据发送到DAC0832
RET ; 返回主程序

以上代码使用了一个简单的查找表（LUT）来生成三角波。首先，将数据指针指向LUT的开头，并使用一个计数器来循环LUT。在每个循环中，将当前计数器值存储在LUT中，并将指针指向下一个位置。然后，将P1.0和P1.1引脚置高，启动DAC0832。接下来，将指针再次指向LUT的开头，并使用另一个计数器来循环LUT。对于每个循环，从LUT中读取数据，并将其存储在R1寄存器中。然后，将数据发送到DAC0832，关闭DAC0832，最后无限循环。