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add set kbd backlight via i2c example in picocalc_helloworld

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cuu
2025-04-27 15:32:55 +08:00
parent f2fa13099c
commit 111319e22d
3 changed files with 48 additions and 0 deletions
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28
Code/picocalc_helloworld/i2ckbd/i2ckbd.c
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@@ -77,6 +77,34 @@ int read_battery() {
return -1;
}
if (buff != 0) {
return buff;
}
return -1;
}
int set_kbd_backlight(uint8_t val){
int retval;
uint16_t buff = 0;
unsigned char msg[2];
msg[0] = 0x0A;
msg[1] = val;
bitSet(msg[0],7);
if (i2c_inited == 0) return -1;
retval = i2c_write_timeout_us(I2C_KBD_MOD, I2C_KBD_ADDR, msg, 2, false, 500000);
if (retval == PICO_ERROR_GENERIC || retval == PICO_ERROR_TIMEOUT) {
printf("read_battery i2c write error\n");
return -1;
}
sleep_ms(16);
retval = i2c_read_timeout_us(I2C_KBD_MOD, I2C_KBD_ADDR, (unsigned char *) &buff, 2, false, 500000);
if (retval == PICO_ERROR_GENERIC || retval == PICO_ERROR_TIMEOUT) {
printf("read_battery i2c read error read\n");
return -1;
}
if (buff != 0) {
return buff;
}