This version of this document is no longer maintained. For the latest documentation, see http://www.qnx.com/developers/docs. |
Perform an I2C master write/read transaction
#include <gf/gf.h> int gf_i2c_writeread ( gf_dev_t gdev, int busno, int slaveaddr, uint8_t * odata, int obytes, uint8_t * idata, int ibytes );
gf
This function performs an I2C master write/read transaction. The transaction performed is what the I2C specification refers to as a combined transfer format. This is typically used to write a register or memory subaddress to the device, followed by a read transfer from that register/memory.
Threads should not call this function between calls to gf_draw_begin() and gf_draw_end(), or a deadlock will occur. |
QNX Graphics Framework
Safety: | |
---|---|
Interrupt handler | No |
Signal handler | No |
Thread | Yes |