path: root/firmware/tuner.c
diff options
authorMichael Sevakis <>2017-01-30 09:52:05 -0500
committerMichael Sevakis <>2017-02-11 22:19:32 -0500
commitfc9695eb47732e1c189e2f033dbd55e5c346e8c4 (patch)
tree550830e9af67f47e3eb87587770b25d22110f57a /firmware/tuner.c
parent6436c6e749ab04fbd5d97804a6a1c3b3122b326d (diff)
Improve radio RDS driver and framework
* Remove unused bits like the radio event and simplify basic radio interface. It can be more self-contained with rds.h only required by radio and tuner code. * Add post-processing to text a-la Silicon Labs AN243. The chip's error correction can only do so much; additional checks are highly recommended. Simply testing for two identical messages in a row is extremely effective and I've never seen corrupted text since doing that, even with mediocre reception. Groups segments must arrive in order, not randomly; logic change only accepts them in order, starting at 0. Time readout was made a bit better but really we'd need to use verbose mode and ensure that no errors were seen during receiving of time and more checks would be need to have a stable PI. The text is the important bit anyway. * Time out of stale text. * Text is no longer updated until a complete group has been received, as is specified in the standard. Perhaps go back to scrolling text lines in the radio screen? * Add proper character conversion to UTF-8. Only the default G0 table for the moment. The other two could be added in. * Add variants "RDS_CFG_PROCESS" and "RDS_CFG_PUSH" to allow the option for processed RDS data to be pushed to the driver and still do proper post-processing (only text conversion for now for the latter). Change-Id: I4d83f8b2e89a209a5096d15ec266477318c66925
Diffstat (limited to 'firmware/tuner.c')
1 files changed, 23 insertions, 0 deletions
diff --git a/firmware/tuner.c b/firmware/tuner.c
index c9c5bc0639..565850c659 100644
--- a/firmware/tuner.c
+++ b/firmware/tuner.c
@@ -24,6 +24,9 @@
#include "kernel.h"
#include "tuner.h"
#include "fmradio.h"
+#ifdef HAVE_RDS_CAP
+#include "rds.h"
+#endif /* HAVE_RDS_CAP */
/* General region information */
const struct fm_region_data fm_region_data[TUNER_NUM_REGIONS] =
@@ -102,4 +105,24 @@ void tuner_init(void)
+#ifdef HAVE_RDS_CAP
+size_t tuner_get_rds_info(int setting, void *dst, size_t dstsize)
+ /* TODO: integrate this into tuner_get/set */
+ static const unsigned char info_id_tbl[] =
+ {
+ };
+ if ((unsigned int)setting >= ARRAYLEN(info_id_tbl))
+ return 0;
+ return rds_pull_info(info_id_tbl[setting], (uintptr_t)dst, dstsize);
+#endif /* HAVE_RDS_CAP */
#endif /* SIMULATOR */