j3d1/esp-open-rtos
1
0
Fork 0
Code Issues Pull requests Projects Releases Wiki Activity

I2c optimization and features (#321)

Browse source 
* custom delay
* Update comment
* add bus control status, add some missing include & fixed display output on sh1104 (#319)
* add some missing include
* Fixed display on SH1106
* Fix comment, add force sytem, rework flag, 16 bits data transfert
* Update all library with new I2C API
* custom delay
* Update comment, add bus control status
* fix i2c read + fix ds3231 temp + fix ssd1306 send
This commit is contained in:
Zaltora 2017-03-21 07:41:47 +01:00 • committed by Ruslan V. Uss
parent 1575bac0c7
commit 813477aa8a
19 changed files with 418 additions and 335 deletions
Download patch file Download diff file Expand all files Collapse all files

23
extras/pcf8574/pcf8574.c
View file

@ -3,9 +3,9 @@
uint8_t pcf8574_port_read(uint8_t addr)
{
i2c_start();
uint8_t res = i2c_write((addr << 1) | 1) ? i2c_read(1) : 0;
i2c_stop();
uint8_t res;
if (i2c_slave_read(addr, NULL, &res, 1))
return 0;
return res;
}
@ -14,11 +14,8 @@ size_t pcf8574_port_read_buf(uint8_t addr, void *buf, size_t len)
if (!len || !buf) return 0;
uint8_t *_buf = (uint8_t *)buf;
i2c_start();
if (!i2c_write((addr << 1) | 1)) return 0;
for (size_t i = 0; i < len; i++)
*_buf++ = i2c_read(i == len - 1);
i2c_stop();
if (i2c_slave_read(addr, NULL, _buf, len))
return 0;
return len;
}
@ -27,18 +24,14 @@ size_t pcf8574_port_write_buf(uint8_t addr, void *buf, size_t len)
if (!len || !buf) return 0;
uint8_t *_buf = (uint8_t *)buf;
i2c_start();
if (!i2c_write(addr << 1)) return 0;
for (size_t i = 0; i < len; i++)
i2c_write(*_buf++);
if (i2c_slave_write(addr, NULL, _buf, len))
return 0;
return len;
}
void pcf8574_port_write(uint8_t addr, uint8_t value)
{
i2c_start();
if (i2c_write(addr << 1)) i2c_write(value);
i2c_stop();
i2c_slave_write(addr, NULL, &value, 1);
}
bool pcf8574_gpio_read(uint8_t addr, uint8_t num)