Jimmy Fang
/
TEST_I2C_0724
I2C master
main.cpp@0:33d0ef188319, 2019-07-24 (annotated)
- Committer:
- jimmy4399
- Date:
- Wed Jul 24 03:27:30 2019 +0000
- Revision:
- 0:33d0ef188319
I2C Master
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
jimmy4399 | 0:33d0ef188319 | 1 | #include "mbed.h" |
jimmy4399 | 0:33d0ef188319 | 2 | |
jimmy4399 | 0:33d0ef188319 | 3 | I2C i2c(I2C_SDA , I2C_SCL ); |
jimmy4399 | 0:33d0ef188319 | 4 | |
jimmy4399 | 0:33d0ef188319 | 5 | const int addr8bit = 0xA0; // 8bit I2C address, 0x90 |
jimmy4399 | 0:33d0ef188319 | 6 | |
jimmy4399 | 0:33d0ef188319 | 7 | char cmd[2]; |
jimmy4399 | 0:33d0ef188319 | 8 | |
jimmy4399 | 0:33d0ef188319 | 9 | int main() |
jimmy4399 | 0:33d0ef188319 | 10 | { |
jimmy4399 | 0:33d0ef188319 | 11 | while(1) |
jimmy4399 | 0:33d0ef188319 | 12 | { |
jimmy4399 | 0:33d0ef188319 | 13 | cmd[0] = 'a'; |
jimmy4399 | 0:33d0ef188319 | 14 | cmd[1] = 'b'; |
jimmy4399 | 0:33d0ef188319 | 15 | i2c.write(addr8bit, cmd, 2); |
jimmy4399 | 0:33d0ef188319 | 16 | |
jimmy4399 | 0:33d0ef188319 | 17 | wait(0.5); |
jimmy4399 | 0:33d0ef188319 | 18 | |
jimmy4399 | 0:33d0ef188319 | 19 | #if 0 |
jimmy4399 | 0:33d0ef188319 | 20 | cmd[0] = 0x00; |
jimmy4399 | 0:33d0ef188319 | 21 | i2c.write(addr8bit, cmd, 1); |
jimmy4399 | 0:33d0ef188319 | 22 | i2c.read( addr8bit, cmd, 2); |
jimmy4399 | 0:33d0ef188319 | 23 | #endif |
jimmy4399 | 0:33d0ef188319 | 24 | } |
jimmy4399 | 0:33d0ef188319 | 25 | } |