Hello all:
I have been struggling to determine why the sync line (TF0) behaves so strangely when in capture mode yet acts fine in playback mode. So far, no real clues. However, I do have a few questions. I have DATADEF set for TD0 set to 1. However, at the end of a playback it pulls to zero. Any clue why this might be happening?
Also, in the machine code, I set up some test code to printk back the gpio registers:
the code for the gpio is given as
#define AT91_PIO_TK0 (1 << (AT91_PIN_PB16 - PIN_BASE) % 32) #define AT91_PIO_TF0 (1 << (AT91_PIN_PB17 - PIN_BASE) % 32) #define AT91_PIO_TD0 (1 << (AT91_PIN_PB18 - PIN_BASE) % 32) #define AT91_PIO_RD0 (1 << (AT91_PIN_PB19 - PIN_BASE) % 32) #define AT91_PIO_RK0 (1 << (AT91_PIN_PB20 - PIN_BASE) % 32) #define AT91_PIO_RF0 (1 << (AT91_PIN_PB21 - PIN_BASE) % 32) . . . ssc_pio_lines = AT91_PIO_TF0 | AT91_PIO_TK0 | AT91_PIO_TD0 | AT91_PIO_RD0 /*| AT91_PIO_RK0 | AT91_PIO_RF0*/ ;
printk("SSC PIO LINES is 0x%x\n",ssc_pio_lines); /* Reset all PIO registers and assign lines to peripheral A */ at91_sys_write(AT91_PIOB + PIO_PDR, ssc_pio_lines); at91_sys_write(AT91_PIOB + PIO_ODR, ssc_pio_lines); at91_sys_write(AT91_PIOB + PIO_IFDR, ssc_pio_lines); at91_sys_write(AT91_PIOB + PIO_CODR, ssc_pio_lines); at91_sys_write(AT91_PIOB + PIO_IDR, ssc_pio_lines); at91_sys_write(AT91_PIOB + PIO_MDDR, ssc_pio_lines); at91_sys_write(AT91_PIOB + PIO_PUDR, ssc_pio_lines); at91_sys_write(AT91_PIOB + PIO_ASR, ssc_pio_lines); at91_sys_write(AT91_PIOB + PIO_OWDR, ssc_pio_lines);
/*TEST CODE*/ printk("PIOB-PDR is set to %d\n",at91_sys_read(AT91_PIOB + PIO_PDR)); printk("PIOB-ODR is set to %d\n",at91_sys_read(AT91_PIOB + PIO_ODR)); printk("PIOB-IFDR is set to %d\n",at91_sys_read(AT91_PIOB + PIO_IFDR)); printk("PIOB-CODR is set to %d\n",at91_sys_read(AT91_PIOB + PIO_CODR)); printk("PIOB-IRD is set to %d\n",at91_sys_read(AT91_PIOB + PIO_IDR)); printk("PIOB-MDDR is set to %d\n",at91_sys_read(AT91_PIOB + PIO_MDDR)); printk("PIOB-PUDR is set to %d\n",at91_sys_read(AT91_PIOB + PIO_PUDR)); printk("PIOB-ASR is set to %d\n",at91_sys_read(AT91_PIOB + PIO_ASR)); printk("PIOB-OWDR is set to %d\n",at91_sys_read(AT91_PIOB + PIO_OWDR)); /*END OF TEST CODE*/
and the result at boot is:
AT91SAM9260EK W6811 Driver <1> w6811: W6811 PCM SoC Audio 0.1 asoc: W6811 <-> at91-ssc0 mapping ok SSC PIO LINES is 0xf0000 PIOB-PDR is set to 0 PIOB-ODR is set to 0 PIOB-IFDR is set to 0 PIOB-CODR is set to 0 PIOB-IRD is set to 0 PIOB-MDDR is set to 0 PIOB-PUDR is set to 0 PIOB-ASR is set to 0 PIOB-OWDR is set to 0
...why are all the registers set to 0?
I may have to try separating TF0/RF0 and TK0/RK0....but should not have to I do not think.
Paul