diff options
| author | Keith Packard <keithp@keithp.com> | 2012-10-14 18:50:45 -0700 |
|---|---|---|
| committer | Keith Packard <keithp@keithp.com> | 2012-10-14 18:50:45 -0700 |
| commit | b7b310e0ff26444e441f82d9a5c0c64a5c71508e (patch) | |
| tree | fca9ec0b0279ebd7b43104b031daee995045d4c0 | |
| parent | 91b8c8b20cead2836ec835f44b4ca0cf06cbf518 (diff) | |
altos: Wait for companion to see CS before attempting communcationcompanion-delay
The AVR just can't go fast enough to see the CS in time, so pause for
a while.
(rewritten from f9607fb76c22187396cceb46b745fa1485d4f155)
Signed-off-by: Keith Packard <keithp@keithp.com>
| -rw-r--r-- | src/drivers/ao_companion.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/src/drivers/ao_companion.c b/src/drivers/ao_companion.c index c749adea..2ed407f1 100644 --- a/src/drivers/ao_companion.c +++ b/src/drivers/ao_companion.c @@ -24,11 +24,14 @@ #endif #define COMPANION_SELECT() do { \ + uint8_t pause; \ ao_spi_get_bit(AO_COMPANION_CS_PORT, \ AO_COMPANION_CS_PIN, \ AO_COMPANION_CS, \ AO_COMPANION_SPI_BUS, \ AO_SPI_SPEED_200kHz); \ + for (pause = 0; pause < 100; pause++) \ + ao_arch_nop(); \ } while (0) #define COMPANION_DESELECT() do { \ |