MPC823: i2c-algo-8xx read interrupt?
bart at ardistech.com
bart at ardistech.com
Sat Feb 9 02:18:17 EST 2002
Hi,
When testing with i2c reading an eeprom on a MPC823e I get the message "IIC
read; complete but rbuf empty". IMHO this is because the interrupt in the TX
buffer is enabled intead of the the interrupt of the RX buffer. Is this a bug
or is there a reason behind this?
Best regards,
Bart Thissen, Ardis Technologies bv
i2c-algo-8xx.c: cpm_iic_read
Original (with TX interrupt and warning)
tbdf->cbd_datlen = count + 1;
tbdf->cbd_sc =
BD_SC_READY | BD_SC_INTRPT | BD_SC_LAST |
BD_SC_WRAP | BD_IIC_START;
rbdf->cbd_datlen = 0;
rbdf->cbd_bufaddr = __pa(buf);
rbdf->cbd_sc = BD_SC_EMPTY | BD_SC_WRAP;
With RX interrupt (without warning):
tbdf->cbd_datlen = count + 1;
tbdf->cbd_sc =
BD_SC_READY | BD_SC_LAST |
BD_SC_WRAP | BD_IIC_START;
rbdf->cbd_datlen = 0;
rbdf->cbd_bufaddr = __pa(buf);
rbdf->cbd_sc = BD_SC_EMPTY | BD_SC_WRAP | BD_SC_INTRPT;
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