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Diffstat (limited to 'utils/atj2137/adfuload/test_binary/backlight_c/test_bl.c')
-rw-r--r--utils/atj2137/adfuload/test_binary/backlight_c/test_bl.c42
1 files changed, 42 insertions, 0 deletions
diff --git a/utils/atj2137/adfuload/test_binary/backlight_c/test_bl.c b/utils/atj2137/adfuload/test_binary/backlight_c/test_bl.c
new file mode 100644
index 0000000000..d67da5ae34
--- /dev/null
+++ b/utils/atj2137/adfuload/test_binary/backlight_c/test_bl.c
@@ -0,0 +1,42 @@
+#include "atj213x.h"
+
+static void backlight_set(int level)
+{
+ /* set duty cycle in 1/32 units */
+ PMU_CHG = ((PMU_CHG & ~PMU_CHG_PDOUT_MASK) | PMU_CHG_PDUT(level));
+}
+
+static void wdt_feed(void)
+{
+ RTC_WDCTL |= RTC_WDCTL_CLR;
+}
+
+int main(void)
+{
+ int i = 0, j = 0;
+
+ /* backlight clock enable, select backlight clock as 32kHz */
+ CMU_FMCLK = (CMU_FMCLK & ~(CMU_FMCLK_BCLK_MASK)) | CMU_FMCLK_BCKE | CMU_FMCLK_BCLK_32K;
+
+ /* baclight enable */
+ PMU_CTL |= PMU_CTL_BL_EN;
+
+ /* pwm output, phase high, some initial duty cycle set as 24/32 */
+ PMU_CHG = ((PMU_CHG & ~PMU_CHG_PDOUT_MASK)| PMU_CHG_PBLS_PWM | PMU_CHG_PPHS_HIGH | PMU_CHG_PDUT(24));
+
+ while(1)
+ {
+ /* otherwise wdt will trigger reset */
+ wdt_feed();
+
+ /* arbitrary delay */
+ if (++i > 30000)
+ {
+ i = 0;
+ j++;
+ backlight_set(j);
+ }
+ }
+
+ return 0;
+}