reduce adxl speed to 100kHz

[fw/altos] / src / drivers / ao_adxl375.c

diff --git a/src/drivers/ao_adxl375.c b/src/drivers/ao_adxl375.c
index dca2213b1ba94cb3b111a19ed81301c6e1cf8450..be9be79c3ef99f0adabffe856e7b689caf4b690d 100644 (file)
--- a/src/drivers/ao_adxl375.c
+++ b/src/drivers/ao_adxl375.c
@@ -21,11 +21,13 @@
 #define DEBUG          0
 
 #if DEBUG
-#define PRINTD(l, ...) do { if (DEBUG & (l)) { printf ("\r%5u %s: ", ao_tick_count, __func__); printf(__VA_ARGS__); flush(); } } while(0)
+#define PRINTD(l, ...) do { if (DEBUG & (l)) { printf ("\r%5lu %s: ", ao_tick_count, __func__); printf(__VA_ARGS__); flush(); } } while(0)
 #else
 #define PRINTD(l,...)
 #endif
 
+#define AO_ADXL375_SPI_SPEED   ao_spi_speed(100000)
+
 struct ao_adxl375_sample       ao_adxl375_current;
 
 static void
@@ -53,7 +55,7 @@ ao_adxl375_reg_read(uint8_t addr)
        ao_spi_duplex(d, d, 2, AO_ADXL375_SPI_INDEX);
        ao_adxl375_stop();
 
-       PRINTD(DEBUG_LOW, "read %x = %x\n", addr, d);
+       PRINTD(DEBUG_LOW, "read %x = %x\n", addr, d[1]);
 
        return d[1];
 }
@@ -71,7 +73,7 @@ ao_adxl375_reg_write(uint8_t addr, uint8_t value)
        ao_adxl375_stop();
 
 #if DEBUG & DEBUG_LOW
-       d[0] = addr | AO_ADXL375_READ
+       d[0] = addr | AO_ADXL375_READ;
        d[1] = 0;
        ao_adxl375_start();
        ao_spi_duplex(d, d, 2, AO_ADXL375_SPI_INDEX);
@@ -103,7 +105,7 @@ struct ao_adxl375_total {
 
 #define MIN_LSB_G      18.4
 #define MAX_LSB_G      22.6
-#define SELF_TEST_MIN_G        6.0
+#define SELF_TEST_MIN_G        5.0
 #define SELF_TEST_MAX_G        6.8
 
 #define MIN_SELF_TEST  ((int32_t) (MIN_LSB_G * SELF_TEST_MIN_G * AO_ADXL375_SELF_TEST_SAMPLES + 0.5))
@@ -127,7 +129,7 @@ ao_adxl375_total_value(struct ao_adxl375_total *total, int samples)
 #define AO_ADXL375_DATA_FORMAT_SETTINGS(self_test) (                   \
                AO_ADXL375_DATA_FORMAT_FIXED |                          \
                (self_test << AO_ADXL375_DATA_FORMAT_SELF_TEST) |       \
-               (AO_ADXL375_DATA_FORMAT_SPI_4_WIRE << AO_ADXL375_DATA_FORMAT_SPI_4_WIRE) | \
+               (AO_ADXL375_DATA_FORMAT_SPI_4_WIRE << AO_ADXL375_DATA_FORMAT_SPI) | \
                (0 << AO_ADXL375_DATA_FORMAT_INT_INVERT) |              \
                (0 << AO_ADXL375_DATA_FORMAT_JUSTIFY))
 
@@ -220,6 +222,7 @@ ao_adxl375_setup(void)
 static void
 ao_adxl375(void)
 {
+       ao_delay(AO_SEC_TO_TICKS(5));
        ao_adxl375_setup();
        for (;;) {
                ao_adxl375_value(&ao_adxl375_current);