Hi,
I need a I2C master for my NIOS II/f. I thought using the I2C master which is shipped by Altera in Quartus Prime 17.0 should serve my needs.
However I'm a bit worried about the software quality of the HAL and drivers.
While testing I recognized that switching speed of the bus is not possible. The clock setting is fixed for 100kHz, setting other values results in wrong behaviour.
altera_avalon_i2c.c:302
Therefore ALT_AVALON_I2C_DIFF_LCNT_HCNT should be adapted to the speed setting.
Did I miss something? What is your experience with the NIOS II software drivers?
In addition, I could not find any proper documentation with examples. Do I really have to browse the header files to get infos about the API?
Cheers, Marc
I need a I2C master for my NIOS II/f. I thought using the I2C master which is shipped by Altera in Quartus Prime 17.0 should serve my needs.
However I'm a bit worried about the software quality of the HAL and drivers.
While testing I recognized that switching speed of the bus is not possible. The clock setting is fixed for 100kHz, setting other values results in wrong behaviour.
altera_avalon_i2c.c:302
Code:
ALT_AVALON_I2C_STATUS_CODE alt_avalon_i2c_master_config_speed_set(
...
/* adjust h/l by predetermined amount */
scl_hcnt = scl_lcnt + ALT_AVALON_I2C_DIFF_LCNT_HCNT; // scl_lcnt+60, should be scl_lcnt+15 for 400kHz
scl_lcnt = scl_lcnt - ALT_AVALON_I2C_DIFF_LCNT_HCNT;
...Did I miss something? What is your experience with the NIOS II software drivers?
In addition, I could not find any proper documentation with examples. Do I really have to browse the header files to get infos about the API?
Cheers, Marc