[RISC-V]Milk-V开发板 i2c测试oled及波形输出

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

视频讲解

【[RISC-V]Milk-V开发板 i2c测试oled及波形输出】