altos: PCA9922 LED driver needs Enable driven low to latch values

Driving Enable high means anything going past on the clock and data
pair is reflected on the LEDs, which isn't terribly useful

Signed-off-by: Keith Packard <keithp@keithp.com>

diff --git a/src/drivers/ao_pca9922.c b/src/drivers/ao_pca9922.c
index 6d8d18d8f8eb7df1880eb9d3ca29887786180515..fe070b884909260b028ee53930b2698d59186c71 100644 (file)
--- a/src/drivers/ao_pca9922.c
+++ b/src/drivers/ao_pca9922.c
@@ -30,9 +30,12 @@ ao_led_apply(void)
        /* Don't try the SPI bus during initialization */
        if (!ao_cur_task)
                return;
-       ao_spi_get_bit(AO_PCA9922_CS_PORT, AO_PCA9922_CS_PIN, AO_PCA9922_CS, AO_PCA9922_SPI_BUS, AO_SPI_SPEED_FAST);
+       ao_mutex_get(&ao_spi_mutex);
+       ao_spi_set_speed(AO_SPI_SPEED_FAST);
+       AO_PCA9922_CS = 1;
        ao_spi_send(&ao_led_state, 1, AO_PCA9922_SPI_BUS);
-       ao_spi_put_bit(AO_PCA9922_CS_PORT, AO_PCA9922_CS_PIN, AO_PCA9922_CS, AO_PCA9922_SPI_BUS);
+       AO_PCA9922_CS = 0;
+       ao_mutex_put(&ao_spi_mutex);
 }
 
 void