I2C3
引脚图
修改i2c3复用功能
build\boards\cv180x\cv1800b_sophpi_duo_sd\u-boot\cvi_board_init.c
//I2C3 pin6 7
PINMUX_CONFIG(SD1_CMD, IIC3_SCL);
PINMUX_CONFIG(SD1_CLK, IIC3_SDA);
扫描I2C3上的设备
[root@cvitek]~# i2cdetect -y -r 3
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: – – – – – – – – – – – – –
10: – – – – – – – – – – – – – – – –
20: – – – – – – – – – – – – – – – –
30: – – – – – – – – – – – – – – – –
40: – – – – – – – – – – – – – – – –
50: – – – – – – – – – – – – – – – –
60: – – – – – – – – – – – 6b – – – –
70: – – – – – – – –
I2C1
扫描
[root@cvitek]~# i2cdetect -y -r 1
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: – – – – – – – – – – – – –
10: – – – – – – – – – – – – – – – –
20: – – – – – – – – – – – – – – – –
30: – – – – – – – – – – – – – – – –
40: – – – – – – – – – – – – – – – –
50: – – – – – – – – – – – – – – – –
60: – – – – – – – – – – – 6b – – – –
70: – – – – – – – –
dump 0x3c上的设备寄存器
[root@cvitek]~# i2cdump -f -y 1 0x3c
0 1 2 3 4 5 6 7 8 9 a b c d e f 0123456789abcdef
00: 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 FFFFFFFFFFFFFFFF
10: 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 FFFFFFFFFFFFFFFF
20: 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 FFFFFFFFFFFFFFFF
30: 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 FFFFFFFFFFFFFFFF
40: 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 FFFFFFFFFFFFFFFF
50: 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 FFFFFFFFFFFFFFFF
60: 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 FFFFFFFFFFFFFFFF
70: 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 FFFFFFFFFFFFFFFF
80: 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 FFFFFFFFFFFFFFFF
90: 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 FFFFFFFFFFFFFFFF
a0: 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 FFFFFFFFFFFFFFFF
b0: 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 FFFFFFFFFFFFFFFF
c0: 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 FFFFFFFFFFFFFFFF
d0: 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 FFFFFFFFFFFFFFFF
e0: 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 FFFFFFFFFFFFFFFF
f0: 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 46 FFFFFFFFFFFFFFFF
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【[RISC-V]Milk-V开发板 i2c测试oled及波形输出】文章来源地址https://www.toymoban.com/news/detail-520009.html
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